Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * sh.c -- a prototype Bourne shell grammar parser |
| 4 | * Intended to follow the original Thompson and Ritchie |
| 5 | * "small and simple is beautiful" philosophy, which |
| 6 | * incidentally is a good match to today's BusyBox. |
| 7 | * |
| 8 | * Copyright (C) 2000,2001 Larry Doolittle <larry@doolittle.boa.org> |
| 9 | * |
| 10 | * Credits: |
| 11 | * The parser routines proper are all original material, first |
Eric Andersen | cb81e64 | 2003-07-14 21:21:08 +0000 | [diff] [blame] | 12 | * written Dec 2000 and Jan 2001 by Larry Doolittle. The |
| 13 | * execution engine, the builtins, and much of the underlying |
| 14 | * support has been adapted from busybox-0.49pre's lash, which is |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 15 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
Eric Andersen | cb81e64 | 2003-07-14 21:21:08 +0000 | [diff] [blame] | 16 | * written by Erik Andersen <andersen@codepoet.org>. That, in turn, |
| 17 | * is based in part on ladsh.c, by Michael K. Johnson and Erik W. |
| 18 | * Troan, which they placed in the public domain. I don't know |
| 19 | * how much of the Johnson/Troan code has survived the repeated |
| 20 | * rewrites. |
| 21 | * |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 22 | * Other credits: |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 23 | * b_addchr() derived from similar w_addchar function in glibc-2.2 |
| 24 | * setup_redirect(), redirect_opt_num(), and big chunks of main() |
Denis Vlasenko | 55b2de7 | 2007-04-18 17:21:28 +0000 | [diff] [blame] | 25 | * and many builtins derived from contributions by Erik Andersen |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 26 | * miscellaneous bugfixes from Matt Kraai |
| 27 | * |
| 28 | * There are two big (and related) architecture differences between |
| 29 | * this parser and the lash parser. One is that this version is |
| 30 | * actually designed from the ground up to understand nearly all |
| 31 | * of the Bourne grammar. The second, consequential change is that |
| 32 | * the parser and input reader have been turned inside out. Now, |
| 33 | * the parser is in control, and asks for input as needed. The old |
| 34 | * way had the input reader in control, and it asked for parsing to |
| 35 | * take place as needed. The new way makes it much easier to properly |
| 36 | * handle the recursion implicit in the various substitutions, especially |
| 37 | * across continuation lines. |
| 38 | * |
| 39 | * Bash grammar not implemented: (how many of these were in original sh?) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 40 | * $_ |
| 41 | * ! negation operator for pipes |
| 42 | * &> and >& redirection of stdout+stderr |
| 43 | * Brace Expansion |
| 44 | * Tilde Expansion |
| 45 | * fancy forms of Parameter Expansion |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 46 | * aliases |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 47 | * Arithmetic Expansion |
| 48 | * <(list) and >(list) Process Substitution |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 49 | * reserved words: case, esac, select, function |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 50 | * Here Documents ( << word ) |
| 51 | * Functions |
| 52 | * Major bugs: |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 53 | * job handling woefully incomplete and buggy (improved --vda) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 54 | * reserved word execution woefully incomplete and buggy |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 55 | * to-do: |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 56 | * port selected bugfixes from post-0.49 busybox lash - done? |
| 57 | * finish implementing reserved words: for, while, until, do, done |
| 58 | * change { and } from special chars to reserved words |
| 59 | * builtins: break, continue, eval, return, set, trap, ulimit |
| 60 | * test magic exec |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 61 | * handle children going into background |
| 62 | * clean up recognition of null pipes |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 63 | * check setting of global_argc and global_argv |
| 64 | * control-C handling, probably with longjmp |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 65 | * follow IFS rules more precisely, including update semantics |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 66 | * figure out what to do with backslash-newline |
| 67 | * explain why we use signal instead of sigaction |
| 68 | * propagate syntax errors, die on resource errors? |
| 69 | * continuation lines, both explicit and implicit - done? |
| 70 | * memory leak finding and plugging - done? |
| 71 | * more testing, especially quoting rules and redirection |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 72 | * document how quoting rules not precisely followed for variable assignments |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 73 | * maybe change charmap[] to use 2-bit entries |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 74 | * (eventually) remove all the printf's |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 75 | * |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 76 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 77 | */ |
Bernhard Reutner-Fischer | e15d757 | 2006-06-02 20:56:16 +0000 | [diff] [blame] | 78 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 79 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 80 | #include <glob.h> /* glob, of course */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 81 | #include <getopt.h> /* should be pretty obvious */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 82 | /* #include <dmalloc.h> */ |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 83 | |
Denis Vlasenko | 1aa7e47 | 2007-11-28 06:49:03 +0000 | [diff] [blame] | 84 | #include "busybox.h" /* for APPLET_IS_NOFORK/NOEXEC */ |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 85 | |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 86 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 87 | #if !BB_MMU && ENABLE_HUSH_TICK |
| 88 | //#undef ENABLE_HUSH_TICK |
| 89 | //#define ENABLE_HUSH_TICK 0 |
| 90 | #warning On NOMMU, hush command substitution is dangerous. |
| 91 | #warning Dont use it for commands which produce lots of output. |
| 92 | #warning For more info see shell/hush.c, generate_stream_from_list(). |
| 93 | #endif |
| 94 | |
| 95 | #if !BB_MMU && ENABLE_HUSH_JOB |
| 96 | #undef ENABLE_HUSH_JOB |
| 97 | #define ENABLE_HUSH_JOB 0 |
| 98 | #endif |
| 99 | |
| 100 | #if !ENABLE_HUSH_INTERACTIVE |
| 101 | #undef ENABLE_FEATURE_EDITING |
| 102 | #define ENABLE_FEATURE_EDITING 0 |
| 103 | #undef ENABLE_FEATURE_EDITING_FANCY_PROMPT |
| 104 | #define ENABLE_FEATURE_EDITING_FANCY_PROMPT 0 |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 105 | #endif |
| 106 | |
| 107 | |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 108 | /* If you comment out one of these below, it will be #defined later |
| 109 | * to perform debug printfs to stderr: */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 110 | #define debug_printf(...) do {} while (0) |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 111 | /* Finer-grained debug switches */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 112 | #define debug_printf_parse(...) do {} while (0) |
| 113 | #define debug_print_tree(a, b) do {} while (0) |
| 114 | #define debug_printf_exec(...) do {} while (0) |
| 115 | #define debug_printf_jobs(...) do {} while (0) |
| 116 | #define debug_printf_expand(...) do {} while (0) |
| 117 | #define debug_printf_clean(...) do {} while (0) |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 118 | |
| 119 | #ifndef debug_printf |
| 120 | #define debug_printf(...) fprintf(stderr, __VA_ARGS__) |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 121 | #endif |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 122 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 123 | #ifndef debug_printf_parse |
| 124 | #define debug_printf_parse(...) fprintf(stderr, __VA_ARGS__) |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 125 | #endif |
| 126 | |
| 127 | #ifndef debug_printf_exec |
| 128 | #define debug_printf_exec(...) fprintf(stderr, __VA_ARGS__) |
| 129 | #endif |
| 130 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 131 | #ifndef debug_printf_jobs |
| 132 | #define debug_printf_jobs(...) fprintf(stderr, __VA_ARGS__) |
| 133 | #define DEBUG_SHELL_JOBS 1 |
| 134 | #endif |
| 135 | |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 136 | #ifndef debug_printf_expand |
| 137 | #define debug_printf_expand(...) fprintf(stderr, __VA_ARGS__) |
| 138 | #define DEBUG_EXPAND 1 |
| 139 | #endif |
| 140 | |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 141 | /* Keep unconditionally on for now */ |
| 142 | #define ENABLE_HUSH_DEBUG 1 |
| 143 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 144 | #ifndef debug_printf_clean |
| 145 | /* broken, of course, but OK for testing */ |
| 146 | static const char *indenter(int i) |
| 147 | { |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 148 | static const char blanks[] ALIGN1 = |
| 149 | " "; |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 150 | return &blanks[sizeof(blanks) - i - 1]; |
| 151 | } |
| 152 | #define debug_printf_clean(...) fprintf(stderr, __VA_ARGS__) |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 153 | #define DEBUG_CLEAN 1 |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 154 | #endif |
| 155 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 156 | |
Denis Vlasenko | f962a03 | 2007-11-23 12:50:54 +0000 | [diff] [blame] | 157 | /* |
| 158 | * Leak hunting. Use hush_leaktool.sh for post-processing. |
| 159 | */ |
| 160 | #ifdef FOR_HUSH_LEAKTOOL |
| 161 | void *xxmalloc(int lineno, size_t size) |
| 162 | { |
| 163 | void *ptr = xmalloc((size + 0xff) & ~0xff); |
| 164 | fprintf(stderr, "line %d: malloc %p\n", lineno, ptr); |
| 165 | return ptr; |
| 166 | } |
| 167 | void *xxrealloc(int lineno, void *ptr, size_t size) |
| 168 | { |
| 169 | ptr = xrealloc(ptr, (size + 0xff) & ~0xff); |
| 170 | fprintf(stderr, "line %d: realloc %p\n", lineno, ptr); |
| 171 | return ptr; |
| 172 | } |
| 173 | char *xxstrdup(int lineno, const char *str) |
| 174 | { |
| 175 | char *ptr = xstrdup(str); |
| 176 | fprintf(stderr, "line %d: strdup %p\n", lineno, ptr); |
| 177 | return ptr; |
| 178 | } |
| 179 | void xxfree(void *ptr) |
| 180 | { |
| 181 | fprintf(stderr, "free %p\n", ptr); |
| 182 | free(ptr); |
| 183 | } |
| 184 | #define xmalloc(s) xxmalloc(__LINE__, s) |
| 185 | #define xrealloc(p, s) xxrealloc(__LINE__, p, s) |
| 186 | #define xstrdup(s) xxstrdup(__LINE__, s) |
| 187 | #define free(p) xxfree(p) |
| 188 | #endif |
| 189 | |
| 190 | |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 191 | #define SPECIAL_VAR_SYMBOL 3 |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 192 | |
| 193 | #define PARSEFLAG_EXIT_FROM_LOOP 1 |
| 194 | #define PARSEFLAG_SEMICOLON (1 << 1) /* symbol ';' is special for parser */ |
| 195 | #define PARSEFLAG_REPARSING (1 << 2) /* >= 2nd pass */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 196 | |
| 197 | typedef enum { |
| 198 | REDIRECT_INPUT = 1, |
| 199 | REDIRECT_OVERWRITE = 2, |
| 200 | REDIRECT_APPEND = 3, |
| 201 | REDIRECT_HEREIS = 4, |
| 202 | REDIRECT_IO = 5 |
| 203 | } redir_type; |
| 204 | |
| 205 | /* The descrip member of this structure is only used to make debugging |
| 206 | * output pretty */ |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 207 | static const struct { |
| 208 | int mode; |
Denis Vlasenko | ef36ead | 2007-05-02 15:34:47 +0000 | [diff] [blame] | 209 | signed char default_fd; |
| 210 | char descrip[3]; |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 211 | } redir_table[] = { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 212 | { 0, 0, "()" }, |
| 213 | { O_RDONLY, 0, "<" }, |
| 214 | { O_CREAT|O_TRUNC|O_WRONLY, 1, ">" }, |
| 215 | { O_CREAT|O_APPEND|O_WRONLY, 1, ">>" }, |
| 216 | { O_RDONLY, -1, "<<" }, |
| 217 | { O_RDWR, 1, "<>" } |
| 218 | }; |
| 219 | |
| 220 | typedef enum { |
| 221 | PIPE_SEQ = 1, |
| 222 | PIPE_AND = 2, |
| 223 | PIPE_OR = 3, |
| 224 | PIPE_BG = 4, |
| 225 | } pipe_style; |
| 226 | |
| 227 | /* might eventually control execution */ |
| 228 | typedef enum { |
| 229 | RES_NONE = 0, |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 230 | #if ENABLE_HUSH_IF |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 231 | RES_IF = 1, |
| 232 | RES_THEN = 2, |
| 233 | RES_ELIF = 3, |
| 234 | RES_ELSE = 4, |
| 235 | RES_FI = 5, |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 236 | #endif |
| 237 | #if ENABLE_HUSH_LOOPS |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 238 | RES_FOR = 6, |
| 239 | RES_WHILE = 7, |
| 240 | RES_UNTIL = 8, |
| 241 | RES_DO = 9, |
| 242 | RES_DONE = 10, |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 243 | RES_IN = 11, |
| 244 | #endif |
| 245 | RES_XXXX = 12, |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 246 | RES_SNTX = 13 |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 247 | } reserved_style; |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 248 | enum { |
| 249 | FLAG_END = (1 << RES_NONE ), |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 250 | #if ENABLE_HUSH_IF |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 251 | FLAG_IF = (1 << RES_IF ), |
| 252 | FLAG_THEN = (1 << RES_THEN ), |
| 253 | FLAG_ELIF = (1 << RES_ELIF ), |
| 254 | FLAG_ELSE = (1 << RES_ELSE ), |
| 255 | FLAG_FI = (1 << RES_FI ), |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 256 | #endif |
| 257 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 258 | FLAG_FOR = (1 << RES_FOR ), |
| 259 | FLAG_WHILE = (1 << RES_WHILE), |
| 260 | FLAG_UNTIL = (1 << RES_UNTIL), |
| 261 | FLAG_DO = (1 << RES_DO ), |
| 262 | FLAG_DONE = (1 << RES_DONE ), |
| 263 | FLAG_IN = (1 << RES_IN ), |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 264 | #endif |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 265 | FLAG_START = (1 << RES_XXXX ), |
| 266 | }; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 267 | |
| 268 | /* This holds pointers to the various results of parsing */ |
| 269 | struct p_context { |
| 270 | struct child_prog *child; |
| 271 | struct pipe *list_head; |
| 272 | struct pipe *pipe; |
| 273 | struct redir_struct *pending_redirect; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 274 | smallint res_w; |
| 275 | smallint parse_type; /* bitmask of PARSEFLAG_xxx, defines type of parser : ";$" common or special symbol */ |
| 276 | int old_flag; /* bitmask of FLAG_xxx, for figuring out valid reserved words */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 277 | struct p_context *stack; |
| 278 | /* How about quoting status? */ |
| 279 | }; |
| 280 | |
| 281 | struct redir_struct { |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 282 | struct redir_struct *next; /* pointer to the next redirect in the list */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 283 | redir_type type; /* type of redirection */ |
| 284 | int fd; /* file descriptor being redirected */ |
| 285 | int dup; /* -1, or file descriptor being duplicated */ |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 286 | char **glob_word; /* *word.gl_pathv is the filename */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 287 | }; |
| 288 | |
| 289 | struct child_prog { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 290 | pid_t pid; /* 0 if exited */ |
| 291 | char **argv; /* program name and arguments */ |
| 292 | struct pipe *group; /* if non-NULL, first in group or subshell */ |
Denis Vlasenko | 262d765 | 2007-05-20 21:52:49 +0000 | [diff] [blame] | 293 | smallint subshell; /* flag, non-zero if group must be forked */ |
| 294 | smallint is_stopped; /* is the program currently running? */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 295 | struct redir_struct *redirects; /* I/O redirections */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 296 | struct pipe *family; /* pointer back to the child's parent pipe */ |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 297 | //sp counting seems to be broken... so commented out, grep for '//sp:' |
| 298 | //sp: int sp; /* number of SPECIAL_VAR_SYMBOL */ |
Denis Vlasenko | 262d765 | 2007-05-20 21:52:49 +0000 | [diff] [blame] | 299 | //seems to be unused, grep for '//pt:' |
| 300 | //pt: int parse_type; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 301 | }; |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 302 | /* argv vector may contain variable references (^Cvar^C, ^C0^C etc) |
| 303 | * and on execution these are substituted with their values. |
| 304 | * Substitution can make _several_ words out of one argv[n]! |
| 305 | * Example: argv[0]=='.^C*^C.' here: echo .$*. |
| 306 | */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 307 | |
| 308 | struct pipe { |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 309 | struct pipe *next; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 310 | int num_progs; /* total number of programs in job */ |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 311 | int running_progs; /* number of programs running (not exited) */ |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 312 | int stopped_progs; /* number of programs alive, but stopped */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 313 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 314 | int jobid; /* job number */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 315 | pid_t pgrp; /* process group ID for the job */ |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 316 | char *cmdtext; /* name of job */ |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 317 | #endif |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 318 | char *cmdbuf; /* buffer various argv's point into */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 319 | struct child_prog *progs; /* array of commands in pipe */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 320 | int job_context; /* bitmask defining current context */ |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 321 | smallint followup; /* PIPE_BG, PIPE_SEQ, PIPE_OR, PIPE_AND */ |
| 322 | smallint res_word; /* needed for if, for, while, until... */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 323 | }; |
| 324 | |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 325 | /* On program start, environ points to initial environment. |
| 326 | * putenv adds new pointers into it, unsetenv removes them. |
| 327 | * Neither of these (de)allocates the strings. |
| 328 | * setenv allocates new strings in malloc space and does putenv, |
| 329 | * and thus setenv is unusable (leaky) for shell's purposes */ |
| 330 | #define setenv(...) setenv_is_leaky_dont_use() |
| 331 | struct variable { |
| 332 | struct variable *next; |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 333 | char *varstr; /* points to "name=" portion */ |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 334 | int max_len; /* if > 0, name is part of initial env; else name is malloced */ |
| 335 | smallint flg_export; /* putenv should be done on this var */ |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 336 | smallint flg_read_only; |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 337 | }; |
| 338 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 339 | typedef struct { |
| 340 | char *data; |
| 341 | int length; |
| 342 | int maxlen; |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 343 | smallint o_quote; |
| 344 | smallint nonnull; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 345 | } o_string; |
| 346 | #define NULL_O_STRING {NULL,0,0,0,0} |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 347 | /* used for initialization: o_string foo = NULL_O_STRING; */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 348 | |
| 349 | /* I can almost use ordinary FILE *. Is open_memstream() universally |
| 350 | * available? Where is it documented? */ |
| 351 | struct in_str { |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 352 | const char *p; |
| 353 | /* eof_flag=1: last char in ->p is really an EOF */ |
| 354 | char eof_flag; /* meaningless if ->p == NULL */ |
| 355 | char peek_buf[2]; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 356 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 357 | smallint promptme; |
| 358 | smallint promptmode; /* 0: PS1, 1: PS2 */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 359 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 360 | FILE *file; |
| 361 | int (*get) (struct in_str *); |
| 362 | int (*peek) (struct in_str *); |
| 363 | }; |
| 364 | #define b_getch(input) ((input)->get(input)) |
| 365 | #define b_peek(input) ((input)->peek(input)) |
| 366 | |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 367 | enum { |
| 368 | CHAR_ORDINARY = 0, |
| 369 | CHAR_ORDINARY_IF_QUOTED = 1, /* example: *, # */ |
| 370 | CHAR_IFS = 2, /* treated as ordinary if quoted */ |
| 371 | CHAR_SPECIAL = 3, /* example: $ */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 372 | }; |
| 373 | |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 374 | #define HUSH_VER_STR "0.02" |
| 375 | |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 376 | /* "Globals" within this file */ |
| 377 | |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 378 | /* Sorted roughly by size (smaller offsets == smaller code) */ |
| 379 | struct globals { |
| 380 | #if ENABLE_HUSH_INTERACTIVE |
| 381 | /* 'interactive_fd' is a fd# open to ctty, if we have one |
| 382 | * _AND_ if we decided to act interactively */ |
| 383 | int interactive_fd; |
| 384 | const char *PS1; |
| 385 | const char *PS2; |
| 386 | #endif |
| 387 | #if ENABLE_FEATURE_EDITING |
| 388 | line_input_t *line_input_state; |
| 389 | #endif |
| 390 | #if ENABLE_HUSH_JOB |
| 391 | int run_list_level; |
| 392 | pid_t saved_task_pgrp; |
| 393 | pid_t saved_tty_pgrp; |
| 394 | int last_jobid; |
| 395 | struct pipe *job_list; |
| 396 | struct pipe *toplevel_list; |
| 397 | smallint ctrl_z_flag; |
| 398 | #endif |
| 399 | smallint fake_mode; |
| 400 | /* these three support $?, $#, and $1 */ |
| 401 | char **global_argv; |
| 402 | int global_argc; |
| 403 | int last_return_code; |
| 404 | const char *ifs; |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 405 | const char *cwd; |
| 406 | unsigned last_bg_pid; |
Denis Vlasenko | 0a83fc3 | 2007-05-25 11:12:32 +0000 | [diff] [blame] | 407 | struct variable *top_var; /* = &shell_ver (set in main()) */ |
| 408 | struct variable shell_ver; |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 409 | #if ENABLE_FEATURE_SH_STANDALONE |
| 410 | struct nofork_save_area nofork_save; |
| 411 | #endif |
| 412 | #if ENABLE_HUSH_JOB |
| 413 | sigjmp_buf toplevel_jb; |
| 414 | #endif |
| 415 | unsigned char charmap[256]; |
| 416 | char user_input_buf[ENABLE_FEATURE_EDITING ? BUFSIZ : 2]; |
| 417 | }; |
| 418 | |
| 419 | #define G (*ptr_to_globals) |
| 420 | |
| 421 | #if !ENABLE_HUSH_INTERACTIVE |
| 422 | enum { interactive_fd = 0 }; |
| 423 | #endif |
| 424 | #if !ENABLE_HUSH_JOB |
| 425 | enum { run_list_level = 0 }; |
| 426 | #endif |
| 427 | |
| 428 | #if ENABLE_HUSH_INTERACTIVE |
| 429 | #define interactive_fd (G.interactive_fd ) |
| 430 | #define PS1 (G.PS1 ) |
| 431 | #define PS2 (G.PS2 ) |
| 432 | #endif |
| 433 | #if ENABLE_FEATURE_EDITING |
| 434 | #define line_input_state (G.line_input_state) |
| 435 | #endif |
| 436 | #if ENABLE_HUSH_JOB |
| 437 | #define run_list_level (G.run_list_level ) |
| 438 | #define saved_task_pgrp (G.saved_task_pgrp ) |
| 439 | #define saved_tty_pgrp (G.saved_tty_pgrp ) |
| 440 | #define last_jobid (G.last_jobid ) |
| 441 | #define job_list (G.job_list ) |
| 442 | #define toplevel_list (G.toplevel_list ) |
| 443 | #define toplevel_jb (G.toplevel_jb ) |
| 444 | #define ctrl_z_flag (G.ctrl_z_flag ) |
| 445 | #endif /* JOB */ |
| 446 | #define global_argv (G.global_argv ) |
| 447 | #define global_argc (G.global_argc ) |
| 448 | #define last_return_code (G.last_return_code) |
| 449 | #define ifs (G.ifs ) |
| 450 | #define fake_mode (G.fake_mode ) |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 451 | #define cwd (G.cwd ) |
| 452 | #define last_bg_pid (G.last_bg_pid ) |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 453 | #define top_var (G.top_var ) |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 454 | #define shell_ver (G.shell_ver ) |
| 455 | #if ENABLE_FEATURE_SH_STANDALONE |
| 456 | #define nofork_save (G.nofork_save ) |
Denis Vlasenko | 4b924f3 | 2007-05-30 00:29:55 +0000 | [diff] [blame] | 457 | #endif |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 458 | #if ENABLE_HUSH_JOB |
| 459 | #define toplevel_jb (G.toplevel_jb ) |
| 460 | #endif |
| 461 | #define charmap (G.charmap ) |
| 462 | #define user_input_buf (G.user_input_buf ) |
Denis Vlasenko | 574f2f4 | 2008-02-27 18:41:59 +0000 | [diff] [blame] | 463 | #define INIT_G() do { \ |
| 464 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
| 465 | } while (0) |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 466 | |
| 467 | |
| 468 | #define B_CHUNK 100 |
| 469 | #define B_NOSPAC 1 |
| 470 | #define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n" |
| 471 | |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 472 | #if 1 |
| 473 | /* Normal */ |
| 474 | static void syntax(const char *msg) |
| 475 | { |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 476 | /* Was using fancy stuff: |
| 477 | * (interactive_fd ? bb_error_msg : bb_error_msg_and_die)(...params...) |
| 478 | * but it SEGVs. ?! Oh well... explicit temp ptr works around that */ |
| 479 | void (*fp)(const char *s, ...); |
| 480 | |
| 481 | fp = (interactive_fd ? bb_error_msg : bb_error_msg_and_die); |
| 482 | fp(msg ? "%s: %s" : "syntax error", "syntax error", msg); |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 483 | } |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 484 | |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 485 | #else |
| 486 | /* Debug */ |
| 487 | static void syntax_lineno(int line) |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 488 | { |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 489 | void (*fp)(const char *s, ...); |
| 490 | |
| 491 | fp = (interactive_fd ? bb_error_msg : bb_error_msg_and_die); |
| 492 | fp("syntax error hush.c:%d", line); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 493 | } |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 494 | #define syntax(str) syntax_lineno(__LINE__) |
| 495 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 496 | |
| 497 | /* Index of subroutines: */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 498 | /* o_string manipulation: */ |
| 499 | static int b_check_space(o_string *o, int len); |
| 500 | static int b_addchr(o_string *o, int ch); |
| 501 | static void b_reset(o_string *o); |
| 502 | static int b_addqchr(o_string *o, int ch, int quote); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 503 | /* in_str manipulations: */ |
| 504 | static int static_get(struct in_str *i); |
| 505 | static int static_peek(struct in_str *i); |
| 506 | static int file_get(struct in_str *i); |
| 507 | static int file_peek(struct in_str *i); |
| 508 | static void setup_file_in_str(struct in_str *i, FILE *f); |
| 509 | static void setup_string_in_str(struct in_str *i, const char *s); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 510 | /* "run" the final data structures: */ |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 511 | #if !defined(DEBUG_CLEAN) |
| 512 | #define free_pipe_list(head, indent) free_pipe_list(head) |
| 513 | #define free_pipe(pi, indent) free_pipe(pi) |
| 514 | #endif |
Eric Andersen | bf7df04 | 2001-05-23 22:18:35 +0000 | [diff] [blame] | 515 | static int free_pipe_list(struct pipe *head, int indent); |
| 516 | static int free_pipe(struct pipe *pi, int indent); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 517 | /* really run the final data structures: */ |
| 518 | static int setup_redirects(struct child_prog *prog, int squirrel[]); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 519 | static int run_list(struct pipe *pi); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 520 | static void pseudo_exec_argv(char **argv) ATTRIBUTE_NORETURN; |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 521 | static void pseudo_exec(struct child_prog *child) ATTRIBUTE_NORETURN; |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 522 | static int run_pipe(struct pipe *pi); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 523 | /* extended glob support: */ |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 524 | static char **globhack(const char *src, char **strings); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 525 | static int glob_needed(const char *s); |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 526 | static int xglob(o_string *dest, char ***pglob); |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 527 | /* variable assignment: */ |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 528 | static int is_assignment(const char *s); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 529 | /* data structure manipulation: */ |
| 530 | static int setup_redirect(struct p_context *ctx, int fd, redir_type style, struct in_str *input); |
| 531 | static void initialize_context(struct p_context *ctx); |
| 532 | static int done_word(o_string *dest, struct p_context *ctx); |
| 533 | static int done_command(struct p_context *ctx); |
| 534 | static int done_pipe(struct p_context *ctx, pipe_style type); |
| 535 | /* primary string parsing: */ |
| 536 | static int redirect_dup_num(struct in_str *input); |
| 537 | static int redirect_opt_num(o_string *o); |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 538 | #if ENABLE_HUSH_TICK |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 539 | static int process_command_subs(o_string *dest, /*struct p_context *ctx,*/ |
| 540 | struct in_str *input, const char *subst_end); |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 541 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 542 | static int parse_group(o_string *dest, struct p_context *ctx, struct in_str *input, int ch); |
Denis Vlasenko | 15d78fb | 2007-01-30 22:28:21 +0000 | [diff] [blame] | 543 | static const char *lookup_param(const char *src); |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 544 | static int handle_dollar(o_string *dest, /*struct p_context *ctx,*/ |
| 545 | struct in_str *input); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 546 | static int parse_stream(o_string *dest, struct p_context *ctx, struct in_str *input0, const char *end_trigger); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 547 | /* setup: */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 548 | static int parse_and_run_stream(struct in_str *inp, int parse_flag); |
| 549 | static int parse_and_run_string(const char *s, int parse_flag); |
| 550 | static int parse_and_run_file(FILE *f); |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 551 | /* job management: */ |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 552 | static int checkjobs(struct pipe* fg_pipe); |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 553 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 554 | static int checkjobs_and_fg_shell(struct pipe* fg_pipe); |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 555 | static void insert_bg_job(struct pipe *pi); |
| 556 | static void remove_bg_job(struct pipe *pi); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 557 | static void delete_finished_bg_job(struct pipe *pi); |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 558 | #else |
| 559 | int checkjobs_and_fg_shell(struct pipe* fg_pipe); /* never called */ |
| 560 | #endif |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 561 | /* local variable support */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 562 | static char **expand_strvec_to_strvec(char **argv); |
| 563 | /* used for eval */ |
| 564 | static char *expand_strvec_to_string(char **argv); |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 565 | /* used for expansion of right hand of assignments */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 566 | static char *expand_string_to_string(const char *str); |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 567 | static struct variable *get_local_var(const char *name); |
| 568 | static int set_local_var(char *str, int flg_export); |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 569 | static void unset_local_var(const char *name); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 570 | |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 571 | |
| 572 | static char **add_strings_to_strings(int need_xstrdup, char **strings, char **add) |
| 573 | { |
| 574 | int i; |
| 575 | unsigned count1; |
| 576 | unsigned count2; |
| 577 | char **v; |
| 578 | |
| 579 | v = strings; |
| 580 | count1 = 0; |
| 581 | if (v) { |
| 582 | while (*v) { |
| 583 | count1++; |
| 584 | v++; |
| 585 | } |
| 586 | } |
| 587 | count2 = 0; |
| 588 | v = add; |
| 589 | while (*v) { |
| 590 | count2++; |
| 591 | v++; |
| 592 | } |
| 593 | v = xrealloc(strings, (count1 + count2 + 1) * sizeof(char*)); |
| 594 | v[count1 + count2] = NULL; |
| 595 | i = count2; |
| 596 | while (--i >= 0) |
| 597 | v[count1 + i] = need_xstrdup ? xstrdup(add[i]) : add[i]; |
| 598 | return v; |
| 599 | } |
| 600 | |
| 601 | /* 'add' should be a malloced pointer */ |
| 602 | static char **add_string_to_strings(char **strings, char *add) |
| 603 | { |
| 604 | char *v[2]; |
| 605 | |
| 606 | v[0] = add; |
| 607 | v[1] = NULL; |
| 608 | |
| 609 | return add_strings_to_strings(0, strings, v); |
| 610 | } |
| 611 | |
| 612 | static void free_strings(char **strings) |
| 613 | { |
| 614 | if (strings) { |
| 615 | char **v = strings; |
| 616 | while (*v) |
| 617 | free(*v++); |
| 618 | free(strings); |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | |
Denis Vlasenko | 8350686 | 2007-11-23 13:11:42 +0000 | [diff] [blame] | 623 | /* Function prototypes for builtins */ |
| 624 | static int builtin_cd(char **argv); |
Denis Vlasenko | 5bc593c | 2007-11-23 21:20:21 +0000 | [diff] [blame] | 625 | static int builtin_echo(char **argv); |
Denis Vlasenko | 8350686 | 2007-11-23 13:11:42 +0000 | [diff] [blame] | 626 | static int builtin_eval(char **argv); |
| 627 | static int builtin_exec(char **argv); |
| 628 | static int builtin_exit(char **argv); |
| 629 | static int builtin_export(char **argv); |
| 630 | #if ENABLE_HUSH_JOB |
| 631 | static int builtin_fg_bg(char **argv); |
| 632 | static int builtin_jobs(char **argv); |
| 633 | #endif |
| 634 | #if ENABLE_HUSH_HELP |
| 635 | static int builtin_help(char **argv); |
| 636 | #endif |
| 637 | static int builtin_pwd(char **argv); |
| 638 | static int builtin_read(char **argv); |
| 639 | static int builtin_test(char **argv); |
| 640 | static int builtin_set(char **argv); |
| 641 | static int builtin_shift(char **argv); |
| 642 | static int builtin_source(char **argv); |
| 643 | static int builtin_umask(char **argv); |
| 644 | static int builtin_unset(char **argv); |
| 645 | //static int builtin_not_written(char **argv); |
| 646 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 647 | /* Table of built-in functions. They can be forked or not, depending on |
| 648 | * context: within pipes, they fork. As simple commands, they do not. |
| 649 | * When used in non-forking context, they can change global variables |
Denis Vlasenko | e1a0d48 | 2006-10-20 13:28:22 +0000 | [diff] [blame] | 650 | * in the parent shell process. If forked, of course they cannot. |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 651 | * For example, 'unset foo | whatever' will parse and run, but foo will |
| 652 | * still be set at the end. */ |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 653 | struct built_in_command { |
| 654 | const char *cmd; /* name */ |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 655 | int (*function) (char **argv); /* function ptr */ |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 656 | #if ENABLE_HUSH_HELP |
| 657 | const char *descr; /* description */ |
| 658 | #define BLTIN(cmd, func, help) { cmd, func, help } |
| 659 | #else |
| 660 | #define BLTIN(cmd, func, help) { cmd, func } |
| 661 | #endif |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 662 | }; |
| 663 | |
Denis Vlasenko | 5bc593c | 2007-11-23 21:20:21 +0000 | [diff] [blame] | 664 | /* For now, echo and test are unconditionally enabled. |
| 665 | * Maybe make it configurable? */ |
"Vladimir N. Oleynik" | 485d7cb | 2005-10-17 09:48:57 +0000 | [diff] [blame] | 666 | static const struct built_in_command bltins[] = { |
Denis Vlasenko | 8350686 | 2007-11-23 13:11:42 +0000 | [diff] [blame] | 667 | BLTIN("[" , builtin_test, "Test condition"), |
| 668 | BLTIN("[[" , builtin_test, "Test condition"), |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 669 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 670 | BLTIN("bg" , builtin_fg_bg, "Resume a job in the background"), |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 671 | #endif |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 672 | // BLTIN("break" , builtin_not_written, "Exit for, while or until loop"), |
| 673 | BLTIN("cd" , builtin_cd, "Change working directory"), |
| 674 | // BLTIN("continue", builtin_not_written, "Continue for, while or until loop"), |
Denis Vlasenko | 5bc593c | 2007-11-23 21:20:21 +0000 | [diff] [blame] | 675 | BLTIN("echo" , builtin_echo, "Write strings to stdout"), |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 676 | BLTIN("eval" , builtin_eval, "Construct and run shell command"), |
| 677 | BLTIN("exec" , builtin_exec, "Exec command, replacing this shell with the exec'd process"), |
| 678 | BLTIN("exit" , builtin_exit, "Exit from shell"), |
| 679 | BLTIN("export", builtin_export, "Set environment variable"), |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 680 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 681 | BLTIN("fg" , builtin_fg_bg, "Bring job into the foreground"), |
| 682 | BLTIN("jobs" , builtin_jobs, "Lists the active jobs"), |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 683 | #endif |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 684 | // TODO: remove pwd? we have it as an applet... |
| 685 | BLTIN("pwd" , builtin_pwd, "Print current directory"), |
| 686 | BLTIN("read" , builtin_read, "Input environment variable"), |
| 687 | // BLTIN("return", builtin_not_written, "Return from a function"), |
| 688 | BLTIN("set" , builtin_set, "Set/unset shell local variables"), |
| 689 | BLTIN("shift" , builtin_shift, "Shift positional parameters"), |
| 690 | // BLTIN("trap" , builtin_not_written, "Trap signals"), |
Denis Vlasenko | 8350686 | 2007-11-23 13:11:42 +0000 | [diff] [blame] | 691 | BLTIN("test" , builtin_test, "Test condition"), |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 692 | // BLTIN("ulimit", builtin_not_written, "Controls resource limits"), |
| 693 | BLTIN("umask" , builtin_umask, "Sets file creation mask"), |
| 694 | BLTIN("unset" , builtin_unset, "Unset environment variable"), |
| 695 | BLTIN("." , builtin_source, "Source-in and run commands in a file"), |
| 696 | #if ENABLE_HUSH_HELP |
| 697 | BLTIN("help" , builtin_help, "List shell built-in commands"), |
| 698 | #endif |
| 699 | BLTIN(NULL, NULL, NULL) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 700 | }; |
| 701 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 702 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 703 | |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 704 | /* Signals are grouped, we handle them in batches */ |
| 705 | static void set_fatal_sighandler(void (*handler)(int)) |
| 706 | { |
Denis Vlasenko | 25591c3 | 2008-02-16 22:58:56 +0000 | [diff] [blame] | 707 | bb_signals(0 |
| 708 | + (1 << SIGILL) |
| 709 | + (1 << SIGTRAP) |
| 710 | + (1 << SIGABRT) |
| 711 | + (1 << SIGFPE) |
| 712 | + (1 << SIGBUS) |
| 713 | + (1 << SIGSEGV) |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 714 | /* bash 3.2 seems to handle these just like 'fatal' ones */ |
Denis Vlasenko | 25591c3 | 2008-02-16 22:58:56 +0000 | [diff] [blame] | 715 | + (1 << SIGHUP) |
| 716 | + (1 << SIGPIPE) |
| 717 | + (1 << SIGALRM) |
| 718 | , handler); |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 719 | } |
| 720 | static void set_jobctrl_sighandler(void (*handler)(int)) |
| 721 | { |
Denis Vlasenko | 25591c3 | 2008-02-16 22:58:56 +0000 | [diff] [blame] | 722 | bb_signals(0 |
| 723 | + (1 << SIGTSTP) |
| 724 | + (1 << SIGTTIN) |
| 725 | + (1 << SIGTTOU) |
| 726 | , handler); |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 727 | } |
| 728 | static void set_misc_sighandler(void (*handler)(int)) |
| 729 | { |
Denis Vlasenko | 25591c3 | 2008-02-16 22:58:56 +0000 | [diff] [blame] | 730 | bb_signals(0 |
| 731 | + (1 << SIGINT) |
| 732 | + (1 << SIGQUIT) |
| 733 | + (1 << SIGTERM) |
| 734 | , handler); |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 735 | } |
| 736 | /* SIGCHLD is special and handled separately */ |
| 737 | |
| 738 | static void set_every_sighandler(void (*handler)(int)) |
| 739 | { |
| 740 | set_fatal_sighandler(handler); |
| 741 | set_jobctrl_sighandler(handler); |
| 742 | set_misc_sighandler(handler); |
| 743 | signal(SIGCHLD, handler); |
| 744 | } |
| 745 | |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 746 | static void handler_ctrl_c(int sig ATTRIBUTE_UNUSED) |
Denis Vlasenko | b5eaabb | 2007-04-28 16:45:59 +0000 | [diff] [blame] | 747 | { |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 748 | debug_printf_jobs("got sig %d\n", sig); |
Denis Vlasenko | b5eaabb | 2007-04-28 16:45:59 +0000 | [diff] [blame] | 749 | // as usual we can have all kinds of nasty problems with leaked malloc data here |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 750 | siglongjmp(toplevel_jb, 1); |
Denis Vlasenko | b5eaabb | 2007-04-28 16:45:59 +0000 | [diff] [blame] | 751 | } |
| 752 | |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 753 | static void handler_ctrl_z(int sig ATTRIBUTE_UNUSED) |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 754 | { |
| 755 | pid_t pid; |
| 756 | |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 757 | debug_printf_jobs("got tty sig %d in pid %d\n", sig, getpid()); |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 758 | pid = fork(); |
Denis Vlasenko | c299032 | 2007-05-16 12:57:12 +0000 | [diff] [blame] | 759 | if (pid < 0) /* can't fork. Pretend there was no ctrl-Z */ |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 760 | return; |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 761 | ctrl_z_flag = 1; |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 762 | if (!pid) { /* child */ |
Denis Vlasenko | 8317799 | 2008-02-11 08:44:36 +0000 | [diff] [blame] | 763 | if (ENABLE_HUSH_JOB) |
| 764 | die_sleep = 0; /* let nofork's xfuncs die */ |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 765 | setpgrp(); |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 766 | debug_printf_jobs("set pgrp for child %d ok\n", getpid()); |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 767 | set_every_sighandler(SIG_DFL); |
Denis Vlasenko | 18e19f2 | 2007-04-28 16:43:18 +0000 | [diff] [blame] | 768 | raise(SIGTSTP); /* resend TSTP so that child will be stopped */ |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 769 | debug_printf_jobs("returning in child\n"); |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 770 | /* return to nofork, it will eventually exit now, |
| 771 | * not return back to shell */ |
| 772 | return; |
| 773 | } |
| 774 | /* parent */ |
| 775 | /* finish filling up pipe info */ |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 776 | toplevel_list->pgrp = pid; /* child is in its own pgrp */ |
| 777 | toplevel_list->progs[0].pid = pid; |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 778 | /* parent needs to longjmp out of running nofork. |
| 779 | * we will "return" exitcode 0, with child put in background */ |
| 780 | // as usual we can have all kinds of nasty problems with leaked malloc data here |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 781 | debug_printf_jobs("siglongjmp in parent\n"); |
| 782 | siglongjmp(toplevel_jb, 1); |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 783 | } |
| 784 | |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 785 | /* Restores tty foreground process group, and exits. |
| 786 | * May be called as signal handler for fatal signal |
| 787 | * (will faithfully resend signal to itself, producing correct exit state) |
| 788 | * or called directly with -EXITCODE. |
| 789 | * We also call it if xfunc is exiting. */ |
| 790 | static void sigexit(int sig) ATTRIBUTE_NORETURN; |
| 791 | static void sigexit(int sig) |
| 792 | { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 793 | /* Disable all signals: job control, SIGPIPE, etc. */ |
Denis Vlasenko | 3f165fa | 2008-03-17 08:29:08 +0000 | [diff] [blame] | 794 | sigprocmask_allsigs(SIG_BLOCK); |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 795 | |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 796 | if (interactive_fd) |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 797 | tcsetpgrp(interactive_fd, saved_tty_pgrp); |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 798 | |
| 799 | /* Not a signal, just exit */ |
| 800 | if (sig <= 0) |
| 801 | _exit(- sig); |
| 802 | |
Denis Vlasenko | 400d8bb | 2008-02-24 13:36:01 +0000 | [diff] [blame] | 803 | kill_myself_with_sig(sig); /* does not return */ |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 804 | } |
| 805 | |
| 806 | /* Restores tty foreground process group, and exits. */ |
| 807 | static void hush_exit(int exitcode) ATTRIBUTE_NORETURN; |
| 808 | static void hush_exit(int exitcode) |
| 809 | { |
| 810 | fflush(NULL); /* flush all streams */ |
| 811 | sigexit(- (exitcode & 0xff)); |
| 812 | } |
| 813 | |
Denis Vlasenko | ef36ead | 2007-05-02 15:34:47 +0000 | [diff] [blame] | 814 | #else /* !JOB */ |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 815 | |
| 816 | #define set_fatal_sighandler(handler) ((void)0) |
| 817 | #define set_jobctrl_sighandler(handler) ((void)0) |
| 818 | #define set_misc_sighandler(handler) ((void)0) |
Denis Vlasenko | ef36ead | 2007-05-02 15:34:47 +0000 | [diff] [blame] | 819 | #define hush_exit(e) exit(e) |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 820 | |
Denis Vlasenko | ef36ead | 2007-05-02 15:34:47 +0000 | [diff] [blame] | 821 | #endif /* JOB */ |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 822 | |
| 823 | |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 824 | static const char *set_cwd(void) |
| 825 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 826 | if (cwd == bb_msg_unknown) |
Denis Vlasenko | 7cced6e | 2007-04-12 17:08:53 +0000 | [diff] [blame] | 827 | cwd = NULL; /* xrealloc_getcwd_or_warn(arg) calls free(arg)! */ |
Denis Vlasenko | 6ca0444 | 2007-02-11 16:19:28 +0000 | [diff] [blame] | 828 | cwd = xrealloc_getcwd_or_warn((char *)cwd); |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 829 | if (!cwd) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 830 | cwd = bb_msg_unknown; |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 831 | return cwd; |
| 832 | } |
| 833 | |
Denis Vlasenko | 8350686 | 2007-11-23 13:11:42 +0000 | [diff] [blame] | 834 | |
| 835 | /* built-in 'test' handler */ |
| 836 | static int builtin_test(char **argv) |
| 837 | { |
| 838 | int argc = 0; |
| 839 | while (*argv) { |
| 840 | argc++; |
| 841 | argv++; |
| 842 | } |
| 843 | return test_main(argc, argv - argc); |
| 844 | } |
| 845 | |
Denis Vlasenko | 5bc593c | 2007-11-23 21:20:21 +0000 | [diff] [blame] | 846 | /* built-in 'test' handler */ |
| 847 | static int builtin_echo(char **argv) |
| 848 | { |
| 849 | int argc = 0; |
| 850 | while (*argv) { |
| 851 | argc++; |
| 852 | argv++; |
| 853 | } |
Denis Vlasenko | fe5e23b | 2007-11-24 02:23:51 +0000 | [diff] [blame] | 854 | return echo_main(argc, argv - argc); |
Denis Vlasenko | 5bc593c | 2007-11-23 21:20:21 +0000 | [diff] [blame] | 855 | } |
| 856 | |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 857 | /* built-in 'eval' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 858 | static int builtin_eval(char **argv) |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 859 | { |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 860 | int rcode = EXIT_SUCCESS; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 861 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 862 | if (argv[1]) { |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 863 | char *str = expand_strvec_to_string(argv + 1); |
| 864 | parse_and_run_string(str, PARSEFLAG_EXIT_FROM_LOOP | |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 865 | PARSEFLAG_SEMICOLON); |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 866 | free(str); |
| 867 | rcode = last_return_code; |
| 868 | } |
| 869 | return rcode; |
| 870 | } |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 871 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 872 | /* built-in 'cd <path>' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 873 | static int builtin_cd(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 874 | { |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 875 | const char *newdir; |
Denis Vlasenko | 96e1b38 | 2007-09-30 23:50:48 +0000 | [diff] [blame] | 876 | if (argv[1] == NULL) { |
| 877 | // bash does nothing (exitcode 0) if HOME is ""; if it's unset, |
| 878 | // bash says "bash: cd: HOME not set" and does nothing (exitcode 1) |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 879 | newdir = getenv("HOME") ? : "/"; |
Denis Vlasenko | 96e1b38 | 2007-09-30 23:50:48 +0000 | [diff] [blame] | 880 | } else |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 881 | newdir = argv[1]; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 882 | if (chdir(newdir)) { |
| 883 | printf("cd: %s: %s\n", newdir, strerror(errno)); |
| 884 | return EXIT_FAILURE; |
| 885 | } |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 886 | set_cwd(); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 887 | return EXIT_SUCCESS; |
| 888 | } |
| 889 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 890 | /* built-in 'exec' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 891 | static int builtin_exec(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 892 | { |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 893 | if (argv[1] == NULL) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 894 | return EXIT_SUCCESS; /* Really? */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 895 | pseudo_exec_argv(argv + 1); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 896 | /* never returns */ |
| 897 | } |
| 898 | |
| 899 | /* built-in 'exit' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 900 | static int builtin_exit(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 901 | { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 902 | // TODO: bash does it ONLY on top-level sh exit (+interacive only?) |
| 903 | //puts("exit"); /* bash does it */ |
Denis Vlasenko | f2fffd0 | 2007-05-02 23:39:04 +0000 | [diff] [blame] | 904 | // TODO: warn if we have background jobs: "There are stopped jobs" |
| 905 | // On second consecutive 'exit', exit anyway. |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 906 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 907 | if (argv[1] == NULL) |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 908 | hush_exit(last_return_code); |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 909 | /* mimic bash: exit 123abc == exit 255 + error msg */ |
| 910 | xfunc_error_retval = 255; |
| 911 | /* bash: exit -2 == exit 254, no error msg */ |
Denis Vlasenko | f2fffd0 | 2007-05-02 23:39:04 +0000 | [diff] [blame] | 912 | hush_exit(xatoi(argv[1]) & 0xff); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 913 | } |
| 914 | |
| 915 | /* built-in 'export VAR=value' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 916 | static int builtin_export(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 917 | { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 918 | const char *value; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 919 | char *name = argv[1]; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 920 | |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 921 | if (name == NULL) { |
Denis Vlasenko | f2fffd0 | 2007-05-02 23:39:04 +0000 | [diff] [blame] | 922 | // TODO: |
| 923 | // ash emits: export VAR='VAL' |
| 924 | // bash: declare -x VAR="VAL" |
| 925 | // (both also escape as needed (quotes, $, etc)) |
| 926 | char **e = environ; |
| 927 | if (e) |
| 928 | while (*e) |
| 929 | puts(*e++); |
| 930 | return EXIT_SUCCESS; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 931 | } |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 932 | |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 933 | value = strchr(name, '='); |
| 934 | if (!value) { |
| 935 | /* They are exporting something without a =VALUE */ |
| 936 | struct variable *var; |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 937 | |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 938 | var = get_local_var(name); |
| 939 | if (var) { |
| 940 | var->flg_export = 1; |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 941 | putenv(var->varstr); |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 942 | } |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 943 | /* bash does not return an error when trying to export |
| 944 | * an undefined variable. Do likewise. */ |
| 945 | return EXIT_SUCCESS; |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 946 | } |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 947 | |
| 948 | set_local_var(xstrdup(name), 1); |
| 949 | return EXIT_SUCCESS; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 950 | } |
| 951 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 952 | #if ENABLE_HUSH_JOB |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 953 | /* built-in 'fg' and 'bg' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 954 | static int builtin_fg_bg(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 955 | { |
Eric Andersen | 0fcd447 | 2001-05-02 20:12:03 +0000 | [diff] [blame] | 956 | int i, jobnum; |
Denis Vlasenko | 8a28e62 | 2007-04-14 11:16:29 +0000 | [diff] [blame] | 957 | struct pipe *pi; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 958 | |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 959 | if (!interactive_fd) |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 960 | return EXIT_FAILURE; |
Eric Andersen | 0fcd447 | 2001-05-02 20:12:03 +0000 | [diff] [blame] | 961 | /* If they gave us no args, assume they want the last backgrounded task */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 962 | if (!argv[1]) { |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 963 | for (pi = job_list; pi; pi = pi->next) { |
| 964 | if (pi->jobid == last_jobid) { |
Denis Vlasenko | 8a28e62 | 2007-04-14 11:16:29 +0000 | [diff] [blame] | 965 | goto found; |
Eric Andersen | 0fcd447 | 2001-05-02 20:12:03 +0000 | [diff] [blame] | 966 | } |
| 967 | } |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 968 | bb_error_msg("%s: no current job", argv[0]); |
Denis Vlasenko | 8a28e62 | 2007-04-14 11:16:29 +0000 | [diff] [blame] | 969 | return EXIT_FAILURE; |
| 970 | } |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 971 | if (sscanf(argv[1], "%%%d", &jobnum) != 1) { |
| 972 | bb_error_msg("%s: bad argument '%s'", argv[0], argv[1]); |
Denis Vlasenko | 8a28e62 | 2007-04-14 11:16:29 +0000 | [diff] [blame] | 973 | return EXIT_FAILURE; |
| 974 | } |
| 975 | for (pi = job_list; pi; pi = pi->next) { |
| 976 | if (pi->jobid == jobnum) { |
| 977 | goto found; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 978 | } |
| 979 | } |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 980 | bb_error_msg("%s: %d: no such job", argv[0], jobnum); |
Denis Vlasenko | 8a28e62 | 2007-04-14 11:16:29 +0000 | [diff] [blame] | 981 | return EXIT_FAILURE; |
| 982 | found: |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 983 | // TODO: bash prints a string representation |
| 984 | // of job being foregrounded (like "sleep 1 | cat") |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 985 | if (*argv[0] == 'f') { |
Eric Andersen | 028b65b | 2001-06-28 01:10:11 +0000 | [diff] [blame] | 986 | /* Put the job into the foreground. */ |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 987 | tcsetpgrp(interactive_fd, pi->pgrp); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 988 | } |
| 989 | |
| 990 | /* Restart the processes in the job */ |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 991 | debug_printf_jobs("reviving %d procs, pgrp %d\n", pi->num_progs, pi->pgrp); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 992 | for (i = 0; i < pi->num_progs; i++) { |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 993 | debug_printf_jobs("reviving pid %d\n", pi->progs[i].pid); |
Eric Andersen | 0fcd447 | 2001-05-02 20:12:03 +0000 | [diff] [blame] | 994 | pi->progs[i].is_stopped = 0; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 995 | } |
| 996 | pi->stopped_progs = 0; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 997 | |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 998 | i = kill(- pi->pgrp, SIGCONT); |
| 999 | if (i < 0) { |
Denis Vlasenko | 8a28e62 | 2007-04-14 11:16:29 +0000 | [diff] [blame] | 1000 | if (errno == ESRCH) { |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1001 | delete_finished_bg_job(pi); |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1002 | return EXIT_SUCCESS; |
Eric Andersen | 028b65b | 2001-06-28 01:10:11 +0000 | [diff] [blame] | 1003 | } else { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1004 | bb_perror_msg("kill (SIGCONT)"); |
Eric Andersen | 028b65b | 2001-06-28 01:10:11 +0000 | [diff] [blame] | 1005 | } |
| 1006 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1007 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1008 | if (*argv[0] == 'f') { |
| 1009 | remove_bg_job(pi); |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 1010 | return checkjobs_and_fg_shell(pi); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1011 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1012 | return EXIT_SUCCESS; |
| 1013 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1014 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1015 | |
| 1016 | /* built-in 'help' handler */ |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 1017 | #if ENABLE_HUSH_HELP |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1018 | static int builtin_help(char **argv ATTRIBUTE_UNUSED) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1019 | { |
"Vladimir N. Oleynik" | 485d7cb | 2005-10-17 09:48:57 +0000 | [diff] [blame] | 1020 | const struct built_in_command *x; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1021 | |
| 1022 | printf("\nBuilt-in commands:\n"); |
| 1023 | printf("-------------------\n"); |
| 1024 | for (x = bltins; x->cmd; x++) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1025 | printf("%s\t%s\n", x->cmd, x->descr); |
| 1026 | } |
| 1027 | printf("\n\n"); |
| 1028 | return EXIT_SUCCESS; |
| 1029 | } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 1030 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1031 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1032 | #if ENABLE_HUSH_JOB |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1033 | /* built-in 'jobs' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1034 | static int builtin_jobs(char **argv ATTRIBUTE_UNUSED) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1035 | { |
| 1036 | struct pipe *job; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1037 | const char *status_string; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1038 | |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1039 | for (job = job_list; job; job = job->next) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1040 | if (job->running_progs == job->stopped_progs) |
| 1041 | status_string = "Stopped"; |
| 1042 | else |
| 1043 | status_string = "Running"; |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 1044 | |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1045 | printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->cmdtext); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1046 | } |
| 1047 | return EXIT_SUCCESS; |
| 1048 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1049 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1050 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1051 | /* built-in 'pwd' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1052 | static int builtin_pwd(char **argv ATTRIBUTE_UNUSED) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1053 | { |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 1054 | puts(set_cwd()); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1055 | return EXIT_SUCCESS; |
| 1056 | } |
| 1057 | |
| 1058 | /* built-in 'read VAR' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1059 | static int builtin_read(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1060 | { |
Denis Vlasenko | d67cef2 | 2007-06-13 06:47:47 +0000 | [diff] [blame] | 1061 | char *string; |
Denis Vlasenko | 3e7b0e6 | 2007-05-16 12:52:15 +0000 | [diff] [blame] | 1062 | const char *name = argv[1] ? argv[1] : "REPLY"; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1063 | |
Denis Vlasenko | d67cef2 | 2007-06-13 06:47:47 +0000 | [diff] [blame] | 1064 | string = xmalloc_reads(STDIN_FILENO, xasprintf("%s=", name)); |
| 1065 | return set_local_var(string, 0); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1066 | } |
| 1067 | |
Denis Vlasenko | 3e7b0e6 | 2007-05-16 12:52:15 +0000 | [diff] [blame] | 1068 | /* built-in 'set [VAR=value]' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1069 | static int builtin_set(char **argv) |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 1070 | { |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1071 | char *temp = argv[1]; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 1072 | struct variable *e; |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 1073 | |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 1074 | if (temp == NULL) |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 1075 | for (e = top_var; e; e = e->next) |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 1076 | puts(e->varstr); |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 1077 | else |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 1078 | set_local_var(xstrdup(temp), 0); |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 1079 | |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1080 | return EXIT_SUCCESS; |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 1081 | } |
| 1082 | |
| 1083 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1084 | /* Built-in 'shift' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1085 | static int builtin_shift(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1086 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1087 | int n = 1; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1088 | if (argv[1]) { |
| 1089 | n = atoi(argv[1]); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1090 | } |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1091 | if (n >= 0 && n < global_argc) { |
Denis Vlasenko | 004baba | 2007-05-20 22:22:18 +0000 | [diff] [blame] | 1092 | global_argv[n] = global_argv[0]; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1093 | global_argc -= n; |
| 1094 | global_argv += n; |
| 1095 | return EXIT_SUCCESS; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1096 | } |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1097 | return EXIT_FAILURE; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1098 | } |
| 1099 | |
| 1100 | /* Built-in '.' handler (read-in and execute commands from file) */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1101 | static int builtin_source(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1102 | { |
| 1103 | FILE *input; |
| 1104 | int status; |
| 1105 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1106 | if (argv[1] == NULL) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1107 | return EXIT_FAILURE; |
| 1108 | |
| 1109 | /* XXX search through $PATH is missing */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1110 | input = fopen(argv[1], "r"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1111 | if (!input) { |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1112 | bb_error_msg("cannot open '%s'", argv[1]); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1113 | return EXIT_FAILURE; |
| 1114 | } |
Denis Vlasenko | a089817 | 2007-10-01 09:59:01 +0000 | [diff] [blame] | 1115 | close_on_exec_on(fileno(input)); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1116 | |
| 1117 | /* Now run the file */ |
| 1118 | /* XXX argv and argc are broken; need to save old global_argv |
| 1119 | * (pointer only is OK!) on this stack frame, |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1120 | * set global_argv=argv+1, recurse, and restore. */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1121 | status = parse_and_run_file(input); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1122 | fclose(input); |
Denis Vlasenko | d9e15f2 | 2006-11-27 16:49:55 +0000 | [diff] [blame] | 1123 | return status; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1124 | } |
| 1125 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1126 | static int builtin_umask(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1127 | { |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1128 | mode_t new_umask; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1129 | const char *arg = argv[1]; |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1130 | char *end; |
| 1131 | if (arg) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1132 | new_umask = strtoul(arg, &end, 8); |
| 1133 | if (*end != '\0' || end == arg) { |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1134 | return EXIT_FAILURE; |
| 1135 | } |
| 1136 | } else { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1137 | new_umask = umask(0); |
| 1138 | printf("%.3o\n", (unsigned) new_umask); |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1139 | } |
| 1140 | umask(new_umask); |
| 1141 | return EXIT_SUCCESS; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1142 | } |
| 1143 | |
| 1144 | /* built-in 'unset VAR' handler */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1145 | static int builtin_unset(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1146 | { |
Denis Vlasenko | 3e7b0e6 | 2007-05-16 12:52:15 +0000 | [diff] [blame] | 1147 | /* bash always returns true */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1148 | unset_local_var(argv[1]); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1149 | return EXIT_SUCCESS; |
| 1150 | } |
| 1151 | |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 1152 | //static int builtin_not_written(char **argv) |
| 1153 | //{ |
| 1154 | // printf("builtin_%s not written\n", argv[0]); |
| 1155 | // return EXIT_FAILURE; |
| 1156 | //} |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1157 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1158 | static int b_check_space(o_string *o, int len) |
| 1159 | { |
| 1160 | /* It would be easy to drop a more restrictive policy |
| 1161 | * in here, such as setting a maximum string length */ |
| 1162 | if (o->length + len > o->maxlen) { |
Denis Vlasenko | f5294e1 | 2007-04-14 10:09:57 +0000 | [diff] [blame] | 1163 | /* assert(data == NULL || o->maxlen != 0); */ |
Denis Vlasenko | ef36ead | 2007-05-02 15:34:47 +0000 | [diff] [blame] | 1164 | o->maxlen += (2*len > B_CHUNK ? 2*len : B_CHUNK); |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1165 | o->data = xrealloc(o->data, 1 + o->maxlen); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1166 | } |
| 1167 | return o->data == NULL; |
| 1168 | } |
| 1169 | |
| 1170 | static int b_addchr(o_string *o, int ch) |
| 1171 | { |
Denis Vlasenko | 831dcc4 | 2007-05-16 15:05:36 +0000 | [diff] [blame] | 1172 | debug_printf("b_addchr: '%c' o->length=%d o=%p\n", ch, o->length, o); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1173 | if (b_check_space(o, 1)) |
| 1174 | return B_NOSPAC; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1175 | o->data[o->length] = ch; |
| 1176 | o->length++; |
| 1177 | o->data[o->length] = '\0'; |
| 1178 | return 0; |
| 1179 | } |
| 1180 | |
| 1181 | static void b_reset(o_string *o) |
| 1182 | { |
| 1183 | o->length = 0; |
| 1184 | o->nonnull = 0; |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 1185 | if (o->data) |
| 1186 | o->data[0] = '\0'; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1187 | } |
| 1188 | |
| 1189 | static void b_free(o_string *o) |
| 1190 | { |
Aaron Lehmann | a170e1c | 2002-11-28 11:27:31 +0000 | [diff] [blame] | 1191 | free(o->data); |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 1192 | memset(o, 0, sizeof(*o)); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1193 | } |
| 1194 | |
| 1195 | /* My analysis of quoting semantics tells me that state information |
| 1196 | * is associated with a destination, not a source. |
| 1197 | */ |
| 1198 | static int b_addqchr(o_string *o, int ch, int quote) |
| 1199 | { |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 1200 | if (quote && strchr("*?[\\", ch)) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1201 | int rc; |
| 1202 | rc = b_addchr(o, '\\'); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1203 | if (rc) |
| 1204 | return rc; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1205 | } |
| 1206 | return b_addchr(o, ch); |
| 1207 | } |
| 1208 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1209 | static int static_get(struct in_str *i) |
| 1210 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1211 | int ch = *i->p++; |
| 1212 | if (ch == '\0') return EOF; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1213 | return ch; |
| 1214 | } |
| 1215 | |
| 1216 | static int static_peek(struct in_str *i) |
| 1217 | { |
| 1218 | return *i->p; |
| 1219 | } |
| 1220 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1221 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1222 | #if ENABLE_FEATURE_EDITING |
Rob Landley | 88621d7 | 2006-08-29 19:41:06 +0000 | [diff] [blame] | 1223 | static void cmdedit_set_initial_prompt(void) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1224 | { |
Denis Vlasenko | 38f6319 | 2007-01-22 09:03:07 +0000 | [diff] [blame] | 1225 | #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1226 | PS1 = NULL; |
| 1227 | #else |
| 1228 | PS1 = getenv("PS1"); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1229 | if (PS1 == NULL) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1230 | PS1 = "\\w \\$ "; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1231 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1232 | } |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1233 | #endif /* EDITING */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1234 | |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 1235 | static const char* setup_prompt_string(int promptmode) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1236 | { |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 1237 | const char *prompt_str; |
| 1238 | debug_printf("setup_prompt_string %d ", promptmode); |
Denis Vlasenko | 38f6319 | 2007-01-22 09:03:07 +0000 | [diff] [blame] | 1239 | #if !ENABLE_FEATURE_EDITING_FANCY_PROMPT |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1240 | /* Set up the prompt */ |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1241 | if (promptmode == 0) { /* PS1 */ |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 1242 | free((char*)PS1); |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1243 | PS1 = xasprintf("%s %c ", cwd, (geteuid() != 0) ? '$' : '#'); |
| 1244 | prompt_str = PS1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1245 | } else { |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 1246 | prompt_str = PS2; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1247 | } |
| 1248 | #else |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1249 | prompt_str = (promptmode == 0) ? PS1 : PS2; |
Eric Andersen | af44a0e | 2001-04-27 07:26:12 +0000 | [diff] [blame] | 1250 | #endif |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1251 | debug_printf("result '%s'\n", prompt_str); |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 1252 | return prompt_str; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1253 | } |
| 1254 | |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1255 | static void get_user_input(struct in_str *i) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1256 | { |
Denis Vlasenko | 0937be5 | 2007-04-28 16:47:08 +0000 | [diff] [blame] | 1257 | int r; |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 1258 | const char *prompt_str; |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1259 | |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 1260 | prompt_str = setup_prompt_string(i->promptmode); |
Denis Vlasenko | 38f6319 | 2007-01-22 09:03:07 +0000 | [diff] [blame] | 1261 | #if ENABLE_FEATURE_EDITING |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1262 | /* Enable command line editing only while a command line |
Denis Vlasenko | e376d45 | 2008-02-20 22:23:24 +0000 | [diff] [blame] | 1263 | * is actually being read */ |
| 1264 | do { |
| 1265 | r = read_line_input(prompt_str, user_input_buf, BUFSIZ-1, line_input_state); |
| 1266 | } while (r == 0); /* repeat if Ctrl-C */ |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1267 | i->eof_flag = (r < 0); |
| 1268 | if (i->eof_flag) { /* EOF/error detected */ |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 1269 | user_input_buf[0] = EOF; /* yes, it will be truncated, it's ok */ |
| 1270 | user_input_buf[1] = '\0'; |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1271 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1272 | #else |
| 1273 | fputs(prompt_str, stdout); |
| 1274 | fflush(stdout); |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 1275 | user_input_buf[0] = r = fgetc(i->file); |
| 1276 | /*user_input_buf[1] = '\0'; - already is and never changed */ |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1277 | i->eof_flag = (r == EOF); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1278 | #endif |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 1279 | i->p = user_input_buf; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1280 | } |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1281 | #endif /* INTERACTIVE */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1282 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1283 | /* This is the magic location that prints prompts |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1284 | * and gets data back from the user */ |
| 1285 | static int file_get(struct in_str *i) |
| 1286 | { |
| 1287 | int ch; |
| 1288 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1289 | /* If there is data waiting, eat it up */ |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1290 | if (i->p && *i->p) { |
Denis Vlasenko | 96f67dc | 2007-05-17 13:02:41 +0000 | [diff] [blame] | 1291 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1292 | take_cached: |
Denis Vlasenko | 96f67dc | 2007-05-17 13:02:41 +0000 | [diff] [blame] | 1293 | #endif |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1294 | ch = *i->p++; |
| 1295 | if (i->eof_flag && !*i->p) |
| 1296 | ch = EOF; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1297 | } else { |
| 1298 | /* need to double check i->file because we might be doing something |
| 1299 | * more complicated by now, like sourcing or substituting. */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1300 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1301 | if (interactive_fd && i->promptme && i->file == stdin) { |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1302 | do { |
| 1303 | get_user_input(i); |
| 1304 | } while (!*i->p); /* need non-empty line */ |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1305 | i->promptmode = 1; /* PS2 */ |
| 1306 | i->promptme = 0; |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1307 | goto take_cached; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1308 | } |
Denis Vlasenko | 96f67dc | 2007-05-17 13:02:41 +0000 | [diff] [blame] | 1309 | #endif |
| 1310 | ch = fgetc(i->file); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1311 | } |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1312 | debug_printf("file_get: got a '%c' %d\n", ch, ch); |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1313 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1314 | if (ch == '\n') |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1315 | i->promptme = 1; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1316 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1317 | return ch; |
| 1318 | } |
| 1319 | |
| 1320 | /* All the callers guarantee this routine will never be |
| 1321 | * used right after a newline, so prompting is not needed. |
| 1322 | */ |
| 1323 | static int file_peek(struct in_str *i) |
| 1324 | { |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 1325 | int ch; |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1326 | if (i->p && *i->p) { |
| 1327 | if (i->eof_flag && !i->p[1]) |
| 1328 | return EOF; |
| 1329 | return *i->p; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1330 | } |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 1331 | ch = fgetc(i->file); |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1332 | i->eof_flag = (ch == EOF); |
| 1333 | i->peek_buf[0] = ch; |
| 1334 | i->peek_buf[1] = '\0'; |
| 1335 | i->p = i->peek_buf; |
| 1336 | debug_printf("file_peek: got a '%c' %d\n", *i->p, *i->p); |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 1337 | return ch; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1338 | } |
| 1339 | |
| 1340 | static void setup_file_in_str(struct in_str *i, FILE *f) |
| 1341 | { |
| 1342 | i->peek = file_peek; |
| 1343 | i->get = file_get; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1344 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1345 | i->promptme = 1; |
| 1346 | i->promptmode = 0; /* PS1 */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1347 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1348 | i->file = f; |
| 1349 | i->p = NULL; |
| 1350 | } |
| 1351 | |
| 1352 | static void setup_string_in_str(struct in_str *i, const char *s) |
| 1353 | { |
| 1354 | i->peek = static_peek; |
| 1355 | i->get = static_get; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1356 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 1357 | i->promptme = 1; |
| 1358 | i->promptmode = 0; /* PS1 */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1359 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1360 | i->p = s; |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 1361 | i->eof_flag = 0; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1362 | } |
| 1363 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1364 | /* squirrel != NULL means we squirrel away copies of stdin, stdout, |
| 1365 | * and stderr if they are redirected. */ |
| 1366 | static int setup_redirects(struct child_prog *prog, int squirrel[]) |
| 1367 | { |
| 1368 | int openfd, mode; |
| 1369 | struct redir_struct *redir; |
| 1370 | |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1371 | for (redir = prog->redirects; redir; redir = redir->next) { |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 1372 | if (redir->dup == -1 && redir->glob_word == NULL) { |
Eric Andersen | 817e73c | 2001-06-06 17:56:09 +0000 | [diff] [blame] | 1373 | /* something went wrong in the parse. Pretend it didn't happen */ |
| 1374 | continue; |
| 1375 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1376 | if (redir->dup == -1) { |
Denis Vlasenko | cccdc4e | 2007-11-23 21:08:38 +0000 | [diff] [blame] | 1377 | char *p; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1378 | mode = redir_table[redir->type].mode; |
Denis Vlasenko | cccdc4e | 2007-11-23 21:08:38 +0000 | [diff] [blame] | 1379 | p = expand_string_to_string(redir->glob_word[0]); |
| 1380 | openfd = open_or_warn(p, mode); |
| 1381 | free(p); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1382 | if (openfd < 0) { |
| 1383 | /* this could get lost if stderr has been redirected, but |
| 1384 | bash and ash both lose it as well (though zsh doesn't!) */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1385 | return 1; |
| 1386 | } |
| 1387 | } else { |
| 1388 | openfd = redir->dup; |
| 1389 | } |
| 1390 | |
| 1391 | if (openfd != redir->fd) { |
| 1392 | if (squirrel && redir->fd < 3) { |
| 1393 | squirrel[redir->fd] = dup(redir->fd); |
| 1394 | } |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1395 | if (openfd == -3) { |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 1396 | //close(openfd); // close(-3) ??! |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1397 | } else { |
| 1398 | dup2(openfd, redir->fd); |
Matt Kraai | c616e53 | 2001-06-05 16:50:08 +0000 | [diff] [blame] | 1399 | if (redir->dup == -1) |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1400 | close(openfd); |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1401 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1402 | } |
| 1403 | } |
| 1404 | return 0; |
| 1405 | } |
| 1406 | |
| 1407 | static void restore_redirects(int squirrel[]) |
| 1408 | { |
| 1409 | int i, fd; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1410 | for (i = 0; i < 3; i++) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1411 | fd = squirrel[i]; |
| 1412 | if (fd != -1) { |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 1413 | /* We simply die on error */ |
| 1414 | xmove_fd(fd, i); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1415 | } |
| 1416 | } |
| 1417 | } |
| 1418 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1419 | /* Called after [v]fork() in run_pipe(), or from builtin_exec(). |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 1420 | * Never returns. |
| 1421 | * XXX no exit() here. If you don't exec, use _exit instead. |
Eric Andersen | 94ac244 | 2001-05-22 19:05:18 +0000 | [diff] [blame] | 1422 | * The at_exit handlers apparently confuse the calling process, |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 1423 | * in particular stdin handling. Not sure why? -- because of vfork! (vda) */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1424 | static void pseudo_exec_argv(char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1425 | { |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 1426 | int i, rcode; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 1427 | char *p; |
"Vladimir N. Oleynik" | 485d7cb | 2005-10-17 09:48:57 +0000 | [diff] [blame] | 1428 | const struct built_in_command *x; |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 1429 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1430 | for (i = 0; is_assignment(argv[i]); i++) { |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1431 | debug_printf_exec("pid %d environment modification: %s\n", |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1432 | getpid(), argv[i]); |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1433 | // FIXME: vfork case?? |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1434 | p = expand_string_to_string(argv[i]); |
| 1435 | putenv(p); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1436 | } |
| 1437 | argv += i; |
| 1438 | /* If a variable is assigned in a forest, and nobody listens, |
| 1439 | * was it ever really set? |
| 1440 | */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1441 | if (!argv[0]) |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1442 | _exit(EXIT_SUCCESS); |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 1443 | |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1444 | argv = expand_strvec_to_strvec(argv); |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 1445 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1446 | /* |
| 1447 | * Check if the command matches any of the builtins. |
| 1448 | * Depending on context, this might be redundant. But it's |
| 1449 | * easier to waste a few CPU cycles than it is to figure out |
| 1450 | * if this is one of those cases. |
| 1451 | */ |
| 1452 | for (x = bltins; x->cmd; x++) { |
| 1453 | if (strcmp(argv[0], x->cmd) == 0) { |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 1454 | debug_printf_exec("running builtin '%s'\n", argv[0]); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1455 | rcode = x->function(argv); |
| 1456 | fflush(stdout); |
| 1457 | _exit(rcode); |
Eric Andersen | 94ac244 | 2001-05-22 19:05:18 +0000 | [diff] [blame] | 1458 | } |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1459 | } |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 1460 | |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1461 | /* Check if the command matches any busybox applets */ |
Denis Vlasenko | 80d14be | 2007-04-10 23:03:30 +0000 | [diff] [blame] | 1462 | #if ENABLE_FEATURE_SH_STANDALONE |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1463 | if (strchr(argv[0], '/') == NULL) { |
Denis Vlasenko | 1aa7e47 | 2007-11-28 06:49:03 +0000 | [diff] [blame] | 1464 | int a = find_applet_by_name(argv[0]); |
| 1465 | if (a >= 0) { |
| 1466 | if (APPLET_IS_NOEXEC(a)) { |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1467 | debug_printf_exec("running applet '%s'\n", argv[0]); |
Denis Vlasenko | 1aa7e47 | 2007-11-28 06:49:03 +0000 | [diff] [blame] | 1468 | // is it ok that run_applet_no_and_exit() does exit(), not _exit()? |
| 1469 | run_applet_no_and_exit(a, argv); |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1470 | } |
| 1471 | /* re-exec ourselves with the new arguments */ |
| 1472 | debug_printf_exec("re-execing applet '%s'\n", argv[0]); |
Denis Vlasenko | bdbbb7e | 2007-06-08 15:02:55 +0000 | [diff] [blame] | 1473 | execvp(bb_busybox_exec_path, argv); |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1474 | /* If they called chroot or otherwise made the binary no longer |
| 1475 | * executable, fall through */ |
| 1476 | } |
| 1477 | } |
Eric Andersen | aac75e5 | 2001-04-30 18:18:45 +0000 | [diff] [blame] | 1478 | #endif |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1479 | |
| 1480 | debug_printf_exec("execing '%s'\n", argv[0]); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1481 | execvp(argv[0], argv); |
| 1482 | bb_perror_msg("cannot exec '%s'", argv[0]); |
| 1483 | _exit(1); |
| 1484 | } |
| 1485 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1486 | /* Called after [v]fork() in run_pipe() |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 1487 | */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1488 | static void pseudo_exec(struct child_prog *child) |
| 1489 | { |
Denis Vlasenko | f2fffd0 | 2007-05-02 23:39:04 +0000 | [diff] [blame] | 1490 | // FIXME: buggy wrt NOMMU! Must not modify any global data |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1491 | // until it does exec/_exit, but currently it does |
| 1492 | // (puts malloc'ed stuff into environment) |
| 1493 | if (child->argv) |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1494 | pseudo_exec_argv(child->argv); |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1495 | |
| 1496 | if (child->group) { |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 1497 | #if !BB_MMU |
Denis Vlasenko | 3b49216 | 2007-12-24 14:26:57 +0000 | [diff] [blame] | 1498 | bb_error_msg_and_die("nested lists are not supported on NOMMU"); |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 1499 | #else |
Denis Vlasenko | 3b49216 | 2007-12-24 14:26:57 +0000 | [diff] [blame] | 1500 | int rcode; |
| 1501 | |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1502 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1503 | // run_list_level now takes care of it? |
| 1504 | // debug_printf_exec("pseudo_exec: setting interactive_fd=0\n"); |
| 1505 | // interactive_fd = 0; /* crucial!!!! */ |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1506 | #endif |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1507 | debug_printf_exec("pseudo_exec: run_list\n"); |
| 1508 | rcode = run_list(child->group); |
Eric Andersen | bf7df04 | 2001-05-23 22:18:35 +0000 | [diff] [blame] | 1509 | /* OK to leak memory by not calling free_pipe_list, |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1510 | * since this process is about to exit */ |
Eric Andersen | 94ac244 | 2001-05-22 19:05:18 +0000 | [diff] [blame] | 1511 | _exit(rcode); |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 1512 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1513 | } |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1514 | |
| 1515 | /* Can happen. See what bash does with ">foo" by itself. */ |
| 1516 | debug_printf("trying to pseudo_exec null command\n"); |
| 1517 | _exit(EXIT_SUCCESS); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1518 | } |
| 1519 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1520 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1521 | static const char *get_cmdtext(struct pipe *pi) |
| 1522 | { |
| 1523 | char **argv; |
| 1524 | char *p; |
| 1525 | int len; |
| 1526 | |
| 1527 | /* This is subtle. ->cmdtext is created only on first backgrounding. |
| 1528 | * (Think "cat, <ctrl-z>, fg, <ctrl-z>, fg, <ctrl-z>...." here...) |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1529 | * On subsequent bg argv is trashed, but we won't use it */ |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1530 | if (pi->cmdtext) |
| 1531 | return pi->cmdtext; |
| 1532 | argv = pi->progs[0].argv; |
| 1533 | if (!argv || !argv[0]) |
| 1534 | return (pi->cmdtext = xzalloc(1)); |
| 1535 | |
| 1536 | len = 0; |
| 1537 | do len += strlen(*argv) + 1; while (*++argv); |
| 1538 | pi->cmdtext = p = xmalloc(len); |
| 1539 | argv = pi->progs[0].argv; |
| 1540 | do { |
| 1541 | len = strlen(*argv); |
| 1542 | memcpy(p, *argv, len); |
| 1543 | p += len; |
| 1544 | *p++ = ' '; |
| 1545 | } while (*++argv); |
| 1546 | p[-1] = '\0'; |
| 1547 | return pi->cmdtext; |
| 1548 | } |
| 1549 | |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1550 | static void insert_bg_job(struct pipe *pi) |
| 1551 | { |
| 1552 | struct pipe *thejob; |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1553 | int i; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1554 | |
| 1555 | /* Linear search for the ID of the job to use */ |
| 1556 | pi->jobid = 1; |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1557 | for (thejob = job_list; thejob; thejob = thejob->next) |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1558 | if (thejob->jobid >= pi->jobid) |
| 1559 | pi->jobid = thejob->jobid + 1; |
| 1560 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1561 | /* Add thejob to the list of running jobs */ |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1562 | if (!job_list) { |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 1563 | thejob = job_list = xmalloc(sizeof(*thejob)); |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1564 | } else { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1565 | for (thejob = job_list; thejob->next; thejob = thejob->next) |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1566 | continue; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1567 | thejob->next = xmalloc(sizeof(*thejob)); |
| 1568 | thejob = thejob->next; |
| 1569 | } |
| 1570 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1571 | /* Physically copy the struct job */ |
Eric Andersen | 0fcd447 | 2001-05-02 20:12:03 +0000 | [diff] [blame] | 1572 | memcpy(thejob, pi, sizeof(struct pipe)); |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1573 | thejob->progs = xzalloc(sizeof(pi->progs[0]) * pi->num_progs); |
| 1574 | /* We cannot copy entire pi->progs[] vector! Double free()s will happen */ |
| 1575 | for (i = 0; i < pi->num_progs; i++) { |
| 1576 | // TODO: do we really need to have so many fields which are just dead weight |
| 1577 | // at execution stage? |
| 1578 | thejob->progs[i].pid = pi->progs[i].pid; |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1579 | /* all other fields are not used and stay zero */ |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1580 | } |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1581 | thejob->next = NULL; |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1582 | thejob->cmdtext = xstrdup(get_cmdtext(pi)); |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1583 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1584 | /* We don't wait for background thejobs to return -- append it |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1585 | to the list of backgrounded thejobs and leave it alone */ |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1586 | printf("[%d] %d %s\n", thejob->jobid, thejob->progs[0].pid, thejob->cmdtext); |
Eric Andersen | 1a6d39b | 2001-05-08 05:11:54 +0000 | [diff] [blame] | 1587 | last_bg_pid = thejob->progs[0].pid; |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1588 | last_jobid = thejob->jobid; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1589 | } |
| 1590 | |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1591 | static void remove_bg_job(struct pipe *pi) |
| 1592 | { |
| 1593 | struct pipe *prev_pipe; |
| 1594 | |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1595 | if (pi == job_list) { |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 1596 | job_list = pi->next; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1597 | } else { |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1598 | prev_pipe = job_list; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1599 | while (prev_pipe->next != pi) |
| 1600 | prev_pipe = prev_pipe->next; |
| 1601 | prev_pipe->next = pi->next; |
| 1602 | } |
Eric Andersen | 028b65b | 2001-06-28 01:10:11 +0000 | [diff] [blame] | 1603 | if (job_list) |
| 1604 | last_jobid = job_list->jobid; |
| 1605 | else |
| 1606 | last_jobid = 0; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1607 | } |
Eric Andersen | 028b65b | 2001-06-28 01:10:11 +0000 | [diff] [blame] | 1608 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1609 | /* remove a backgrounded job */ |
| 1610 | static void delete_finished_bg_job(struct pipe *pi) |
| 1611 | { |
| 1612 | remove_bg_job(pi); |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 1613 | pi->stopped_progs = 0; |
Eric Andersen | bf7df04 | 2001-05-23 22:18:35 +0000 | [diff] [blame] | 1614 | free_pipe(pi, 0); |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1615 | free(pi); |
| 1616 | } |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1617 | #endif /* JOB */ |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1618 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1619 | /* Checks to see if any processes have exited -- if they |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1620 | have, figure out why and see if a job has completed */ |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1621 | static int checkjobs(struct pipe* fg_pipe) |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1622 | { |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1623 | int attributes; |
| 1624 | int status; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1625 | #if ENABLE_HUSH_JOB |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1626 | int prognum = 0; |
| 1627 | struct pipe *pi; |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1628 | #endif |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1629 | pid_t childpid; |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1630 | int rcode = 0; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1631 | |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1632 | attributes = WUNTRACED; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1633 | if (fg_pipe == NULL) { |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1634 | attributes |= WNOHANG; |
| 1635 | } |
| 1636 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1637 | /* Do we do this right? |
| 1638 | * bash-3.00# sleep 20 | false |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1639 | * <ctrl-Z pressed> |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1640 | * [3]+ Stopped sleep 20 | false |
| 1641 | * bash-3.00# echo $? |
| 1642 | * 1 <========== bg pipe is not fully done, but exitcode is already known! |
| 1643 | */ |
| 1644 | |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1645 | //FIXME: non-interactive bash does not continue even if all processes in fg pipe |
| 1646 | //are stopped. Testcase: "cat | cat" in a script (not on command line) |
| 1647 | // + killall -STOP cat |
| 1648 | |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1649 | wait_more: |
Denis Vlasenko | fb0eba7 | 2008-01-02 19:55:04 +0000 | [diff] [blame] | 1650 | // TODO: safe_waitpid? |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1651 | while ((childpid = waitpid(-1, &status, attributes)) > 0) { |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1652 | const int dead = WIFEXITED(status) || WIFSIGNALED(status); |
| 1653 | |
| 1654 | #ifdef DEBUG_SHELL_JOBS |
| 1655 | if (WIFSTOPPED(status)) |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 1656 | debug_printf_jobs("pid %d stopped by sig %d (exitcode %d)\n", |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1657 | childpid, WSTOPSIG(status), WEXITSTATUS(status)); |
| 1658 | if (WIFSIGNALED(status)) |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 1659 | debug_printf_jobs("pid %d killed by sig %d (exitcode %d)\n", |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1660 | childpid, WTERMSIG(status), WEXITSTATUS(status)); |
| 1661 | if (WIFEXITED(status)) |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 1662 | debug_printf_jobs("pid %d exited, exitcode %d\n", |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1663 | childpid, WEXITSTATUS(status)); |
| 1664 | #endif |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1665 | /* Were we asked to wait for fg pipe? */ |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1666 | if (fg_pipe) { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1667 | int i; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1668 | for (i = 0; i < fg_pipe->num_progs; i++) { |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 1669 | debug_printf_jobs("check pid %d\n", fg_pipe->progs[i].pid); |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1670 | if (fg_pipe->progs[i].pid == childpid) { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1671 | /* printf("process %d exit %d\n", i, WEXITSTATUS(status)); */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1672 | if (dead) { |
| 1673 | fg_pipe->progs[i].pid = 0; |
| 1674 | fg_pipe->running_progs--; |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1675 | if (i == fg_pipe->num_progs - 1) |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1676 | /* last process gives overall exitstatus */ |
| 1677 | rcode = WEXITSTATUS(status); |
| 1678 | } else { |
| 1679 | fg_pipe->progs[i].is_stopped = 1; |
| 1680 | fg_pipe->stopped_progs++; |
| 1681 | } |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 1682 | debug_printf_jobs("fg_pipe: running_progs %d stopped_progs %d\n", |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1683 | fg_pipe->running_progs, fg_pipe->stopped_progs); |
| 1684 | if (fg_pipe->running_progs - fg_pipe->stopped_progs <= 0) { |
| 1685 | /* All processes in fg pipe have exited/stopped */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1686 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1687 | if (fg_pipe->running_progs) |
| 1688 | insert_bg_job(fg_pipe); |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1689 | #endif |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1690 | return rcode; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1691 | } |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1692 | /* There are still running processes in the fg pipe */ |
| 1693 | goto wait_more; |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1694 | } |
| 1695 | } |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1696 | /* fall through to searching process in bg pipes */ |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1697 | } |
| 1698 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1699 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1700 | /* We asked to wait for bg or orphaned children */ |
| 1701 | /* No need to remember exitcode in this case */ |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1702 | for (pi = job_list; pi; pi = pi->next) { |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1703 | prognum = 0; |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 1704 | while (prognum < pi->num_progs) { |
| 1705 | if (pi->progs[prognum].pid == childpid) |
| 1706 | goto found_pi_and_prognum; |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 1707 | prognum++; |
| 1708 | } |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1709 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1710 | #endif |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1711 | |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 1712 | /* Happens when shell is used as init process (init=/bin/sh) */ |
| 1713 | debug_printf("checkjobs: pid %d was not in our list!\n", childpid); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1714 | goto wait_more; |
Eric Andersen | aeb44c4 | 2001-05-22 20:29:00 +0000 | [diff] [blame] | 1715 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1716 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 1717 | found_pi_and_prognum: |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1718 | if (dead) { |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1719 | /* child exited */ |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1720 | pi->progs[prognum].pid = 0; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1721 | pi->running_progs--; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1722 | if (!pi->running_progs) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1723 | printf(JOB_STATUS_FORMAT, pi->jobid, |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1724 | "Done", pi->cmdtext); |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1725 | delete_finished_bg_job(pi); |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1726 | } |
| 1727 | } else { |
| 1728 | /* child stopped */ |
| 1729 | pi->stopped_progs++; |
| 1730 | pi->progs[prognum].is_stopped = 1; |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1731 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1732 | #endif |
Eric Andersen | bafd94f | 2001-05-02 16:11:59 +0000 | [diff] [blame] | 1733 | } |
| 1734 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1735 | /* wait found no children or failed */ |
| 1736 | |
| 1737 | if (childpid && errno != ECHILD) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1738 | bb_perror_msg("waitpid"); |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1739 | return rcode; |
Eric Andersen | ada18ff | 2001-05-21 16:18:22 +0000 | [diff] [blame] | 1740 | } |
| 1741 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1742 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 1743 | static int checkjobs_and_fg_shell(struct pipe* fg_pipe) |
| 1744 | { |
| 1745 | pid_t p; |
| 1746 | int rcode = checkjobs(fg_pipe); |
| 1747 | /* Job finished, move the shell to the foreground */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1748 | p = getpgid(0); /* pgid of our process */ |
| 1749 | debug_printf_jobs("fg'ing ourself: getpgid(0)=%d\n", (int)p); |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 1750 | if (tcsetpgrp(interactive_fd, p) && errno != ENOTTY) |
| 1751 | bb_perror_msg("tcsetpgrp-4a"); |
| 1752 | return rcode; |
| 1753 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1754 | #endif |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 1755 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1756 | /* run_pipe() starts all the jobs, but doesn't wait for anything |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 1757 | * to finish. See checkjobs(). |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1758 | * |
| 1759 | * return code is normally -1, when the caller has to wait for children |
| 1760 | * to finish to determine the exit status of the pipe. If the pipe |
| 1761 | * is a simple builtin command, however, the action is done by the |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1762 | * time run_pipe returns, and the exit code is provided as the |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1763 | * return value. |
| 1764 | * |
| 1765 | * The input of the pipe is always stdin, the output is always |
| 1766 | * stdout. The outpipe[] mechanism in BusyBox-0.48 lash is bogus, |
| 1767 | * because it tries to avoid running the command substitution in |
| 1768 | * subshell, when that is in fact necessary. The subshell process |
| 1769 | * now has its stdout directed to the input of the appropriate pipe, |
| 1770 | * so this routine is noticeably simpler. |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1771 | * |
| 1772 | * Returns -1 only if started some children. IOW: we have to |
| 1773 | * mask out retvals of builtins etc with 0xff! |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1774 | */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1775 | static int run_pipe(struct pipe *pi) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1776 | { |
| 1777 | int i; |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1778 | int nextin; |
| 1779 | int pipefds[2]; /* pipefds[0] is for reading */ |
Rob Landley | 53702e5 | 2006-07-19 21:43:53 +0000 | [diff] [blame] | 1780 | struct child_prog *child; |
"Vladimir N. Oleynik" | 485d7cb | 2005-10-17 09:48:57 +0000 | [diff] [blame] | 1781 | const struct built_in_command *x; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 1782 | char *p; |
Denis Vlasenko | f5294e1 | 2007-04-14 10:09:57 +0000 | [diff] [blame] | 1783 | /* it is not always needed, but we aim to smaller code */ |
| 1784 | int squirrel[] = { -1, -1, -1 }; |
| 1785 | int rcode; |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 1786 | const int single_fg = (pi->num_progs == 1 && pi->followup != PIPE_BG); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1787 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1788 | debug_printf_exec("run_pipe start: single_fg=%d\n", single_fg); |
Denis Vlasenko | 4ac530c | 2007-05-02 15:35:45 +0000 | [diff] [blame] | 1789 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1790 | #if ENABLE_HUSH_JOB |
Eric Andersen | ada18ff | 2001-05-21 16:18:22 +0000 | [diff] [blame] | 1791 | pi->pgrp = -1; |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1792 | #endif |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1793 | pi->running_progs = 1; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1794 | pi->stopped_progs = 0; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1795 | |
| 1796 | /* Check if this is a simple builtin (not part of a pipe). |
| 1797 | * Builtins within pipes have to fork anyway, and are handled in |
| 1798 | * pseudo_exec. "echo foo | read bar" doesn't work on bash, either. |
| 1799 | */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1800 | child = &(pi->progs[0]); |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 1801 | if (single_fg && child->group && child->subshell == 0) { |
Eric Andersen | 04407e5 | 2001-06-07 16:42:05 +0000 | [diff] [blame] | 1802 | debug_printf("non-subshell grouping\n"); |
| 1803 | setup_redirects(child, squirrel); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1804 | debug_printf_exec(": run_list\n"); |
| 1805 | rcode = run_list(child->group) & 0xff; |
Eric Andersen | 04407e5 | 2001-06-07 16:42:05 +0000 | [diff] [blame] | 1806 | restore_redirects(squirrel); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1807 | debug_printf_exec("run_pipe return %d\n", rcode); |
| 1808 | return rcode; |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1809 | } |
| 1810 | |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1811 | if (single_fg && child->argv != NULL) { |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1812 | char **argv_expanded; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1813 | char **argv = child->argv; |
| 1814 | |
| 1815 | for (i = 0; is_assignment(argv[i]); i++) |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1816 | continue; |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1817 | if (i != 0 && argv[i] == NULL) { |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 1818 | /* assignments, but no command: set the local environment */ |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1819 | for (i = 0; argv[i] != NULL; i++) { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 1820 | debug_printf("local environment set: %s\n", argv[i]); |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1821 | p = expand_string_to_string(argv[i]); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 1822 | set_local_var(p, 0); |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 1823 | } |
| 1824 | return EXIT_SUCCESS; /* don't worry about errors in set_local_var() yet */ |
| 1825 | } |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1826 | for (i = 0; is_assignment(argv[i]); i++) { |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1827 | p = expand_string_to_string(argv[i]); |
| 1828 | //sp: child->sp--; |
| 1829 | putenv(p); |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 1830 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1831 | for (x = bltins; x->cmd; x++) { |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1832 | if (strcmp(argv[i], x->cmd) == 0) { |
| 1833 | if (x->function == builtin_exec && argv[i+1] == NULL) { |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1834 | debug_printf("magic exec\n"); |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1835 | setup_redirects(child, NULL); |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 1836 | return EXIT_SUCCESS; |
| 1837 | } |
Denis Vlasenko | 1359da6 | 2007-04-21 23:27:30 +0000 | [diff] [blame] | 1838 | debug_printf("builtin inline %s\n", argv[0]); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1839 | /* XXX setup_redirects acts on file descriptors, not FILEs. |
| 1840 | * This is perfect for work that comes after exec(). |
| 1841 | * Is it really safe for inline use? Experimentally, |
| 1842 | * things seem to work with glibc. */ |
| 1843 | setup_redirects(child, squirrel); |
Denis Vlasenko | d01ff13 | 2007-05-02 21:40:23 +0000 | [diff] [blame] | 1844 | debug_printf_exec(": builtin '%s' '%s'...\n", x->cmd, argv[i+1]); |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1845 | //sp: if (child->sp) /* btw we can do it unconditionally... */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1846 | argv_expanded = expand_strvec_to_strvec(argv + i); |
| 1847 | rcode = x->function(argv_expanded) & 0xff; |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1848 | free(argv_expanded); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1849 | restore_redirects(squirrel); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1850 | debug_printf_exec("run_pipe return %d\n", rcode); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1851 | return rcode; |
| 1852 | } |
| 1853 | } |
Denis Vlasenko | f5294e1 | 2007-04-14 10:09:57 +0000 | [diff] [blame] | 1854 | #if ENABLE_FEATURE_SH_STANDALONE |
| 1855 | { |
Denis Vlasenko | 1aa7e47 | 2007-11-28 06:49:03 +0000 | [diff] [blame] | 1856 | int a = find_applet_by_name(argv[i]); |
| 1857 | if (a >= 0 && APPLET_IS_NOFORK(a)) { |
Denis Vlasenko | f5294e1 | 2007-04-14 10:09:57 +0000 | [diff] [blame] | 1858 | setup_redirects(child, squirrel); |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1859 | save_nofork_data(&nofork_save); |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 1860 | argv_expanded = argv + i; |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1861 | //sp: if (child->sp) |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1862 | argv_expanded = expand_strvec_to_strvec(argv + i); |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 1863 | debug_printf_exec(": run_nofork_applet '%s' '%s'...\n", argv_expanded[0], argv_expanded[1]); |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1864 | rcode = run_nofork_applet_prime(&nofork_save, a, argv_expanded) & 0xff; |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 1865 | free(argv_expanded); |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1866 | restore_redirects(squirrel); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1867 | debug_printf_exec("run_pipe return %d\n", rcode); |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1868 | return rcode; |
Denis Vlasenko | f5294e1 | 2007-04-14 10:09:57 +0000 | [diff] [blame] | 1869 | } |
| 1870 | } |
| 1871 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1872 | } |
| 1873 | |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1874 | /* Disable job control signals for shell (parent) and |
| 1875 | * for initial child code after fork */ |
| 1876 | set_jobctrl_sighandler(SIG_IGN); |
| 1877 | |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1878 | /* Going to fork a child per each pipe member */ |
| 1879 | pi->running_progs = 0; |
| 1880 | nextin = 0; |
| 1881 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1882 | for (i = 0; i < pi->num_progs; i++) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 1883 | child = &(pi->progs[i]); |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1884 | if (child->argv) |
| 1885 | debug_printf_exec(": pipe member '%s' '%s'...\n", child->argv[0], child->argv[1]); |
| 1886 | else |
| 1887 | debug_printf_exec(": pipe member with no argv\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1888 | |
| 1889 | /* pipes are inserted between pairs of commands */ |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1890 | pipefds[0] = 0; |
| 1891 | pipefds[1] = 1; |
| 1892 | if ((i + 1) < pi->num_progs) |
| 1893 | xpipe(pipefds); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1894 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1895 | child->pid = BB_MMU ? fork() : vfork(); |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1896 | if (!child->pid) { /* child */ |
Denis Vlasenko | 8317799 | 2008-02-11 08:44:36 +0000 | [diff] [blame] | 1897 | if (ENABLE_HUSH_JOB) |
| 1898 | die_sleep = 0; /* let nofork's xfuncs die */ |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1899 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1900 | /* Every child adds itself to new process group |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1901 | * with pgid == pid_of_first_child_in_pipe */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 1902 | if (run_list_level == 1 && interactive_fd) { |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1903 | pid_t pgrp; |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 1904 | /* Don't do pgrp restore anymore on fatal signals */ |
| 1905 | set_fatal_sighandler(SIG_DFL); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1906 | pgrp = pi->pgrp; |
| 1907 | if (pgrp < 0) /* true for 1st process only */ |
| 1908 | pgrp = getpid(); |
| 1909 | if (setpgid(0, pgrp) == 0 && pi->followup != PIPE_BG) { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1910 | /* We do it in *every* child, not just first, |
| 1911 | * to avoid races */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1912 | tcsetpgrp(interactive_fd, pgrp); |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1913 | } |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1914 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1915 | #endif |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 1916 | xmove_fd(nextin, 0); |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1917 | xmove_fd(pipefds[1], 1); /* write end */ |
| 1918 | if (pipefds[0] > 1) |
| 1919 | close(pipefds[0]); /* read end */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1920 | /* Like bash, explicit redirects override pipes, |
| 1921 | * and the pipe fd is available for dup'ing. */ |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 1922 | setup_redirects(child, NULL); |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 1923 | |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 1924 | /* Restore default handlers just prior to exec */ |
| 1925 | set_jobctrl_sighandler(SIG_DFL); |
| 1926 | set_misc_sighandler(SIG_DFL); |
| 1927 | signal(SIGCHLD, SIG_DFL); |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1928 | pseudo_exec(child); /* does not return */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1929 | } |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 1930 | |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1931 | if (child->pid < 0) { /* [v]fork failed */ |
| 1932 | /* Clearly indicate, was it fork or vfork */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1933 | bb_perror_msg(BB_MMU ? "fork" : "vfork"); |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1934 | } else { |
| 1935 | pi->running_progs++; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 1936 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1937 | /* Second and next children need to know pid of first one */ |
| 1938 | if (pi->pgrp < 0) |
| 1939 | pi->pgrp = child->pid; |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 1940 | #endif |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1941 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1942 | |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1943 | if (i) |
| 1944 | close(nextin); |
| 1945 | if ((i + 1) < pi->num_progs) |
| 1946 | close(pipefds[1]); /* write end */ |
| 1947 | /* Pass read (output) pipe end to next iteration */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1948 | nextin = pipefds[0]; |
| 1949 | } |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 1950 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 1951 | if (!pi->running_progs) { |
| 1952 | debug_printf_exec("run_pipe return 1 (all forks failed, no children)\n"); |
| 1953 | return 1; |
| 1954 | } |
| 1955 | |
| 1956 | debug_printf_exec("run_pipe return -1 (%u children started)\n", pi->running_progs); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 1957 | return -1; |
| 1958 | } |
| 1959 | |
Denis Vlasenko | 4b924f3 | 2007-05-30 00:29:55 +0000 | [diff] [blame] | 1960 | #ifndef debug_print_tree |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 1961 | static void debug_print_tree(struct pipe *pi, int lvl) |
| 1962 | { |
| 1963 | static const char *PIPE[] = { |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1964 | [PIPE_SEQ] = "SEQ", |
| 1965 | [PIPE_AND] = "AND", |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 1966 | [PIPE_OR ] = "OR" , |
| 1967 | [PIPE_BG ] = "BG" , |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 1968 | }; |
| 1969 | static const char *RES[] = { |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1970 | [RES_NONE ] = "NONE" , |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 1971 | #if ENABLE_HUSH_IF |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1972 | [RES_IF ] = "IF" , |
| 1973 | [RES_THEN ] = "THEN" , |
| 1974 | [RES_ELIF ] = "ELIF" , |
| 1975 | [RES_ELSE ] = "ELSE" , |
| 1976 | [RES_FI ] = "FI" , |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 1977 | #endif |
| 1978 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1979 | [RES_FOR ] = "FOR" , |
| 1980 | [RES_WHILE] = "WHILE", |
| 1981 | [RES_UNTIL] = "UNTIL", |
| 1982 | [RES_DO ] = "DO" , |
| 1983 | [RES_DONE ] = "DONE" , |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1984 | [RES_IN ] = "IN" , |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 1985 | #endif |
| 1986 | [RES_XXXX ] = "XXXX" , |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 1987 | [RES_SNTX ] = "SNTX" , |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 1988 | }; |
| 1989 | |
| 1990 | int pin, prn; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 1991 | |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 1992 | pin = 0; |
| 1993 | while (pi) { |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 1994 | fprintf(stderr, "%*spipe %d res_word=%s followup=%d %s\n", lvl*2, "", |
| 1995 | pin, RES[pi->res_word], pi->followup, PIPE[pi->followup]); |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 1996 | prn = 0; |
| 1997 | while (prn < pi->num_progs) { |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 1998 | struct child_prog *child = &pi->progs[prn]; |
| 1999 | char **argv = child->argv; |
| 2000 | |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 2001 | fprintf(stderr, "%*s prog %d", lvl*2, "", prn); |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 2002 | if (child->group) { |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2003 | fprintf(stderr, " group %s: (argv=%p)\n", |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 2004 | (child->subshell ? "()" : "{}"), |
| 2005 | argv); |
| 2006 | debug_print_tree(child->group, lvl+1); |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 2007 | prn++; |
| 2008 | continue; |
| 2009 | } |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 2010 | if (argv) while (*argv) { |
| 2011 | fprintf(stderr, " '%s'", *argv); |
| 2012 | argv++; |
Denis Vlasenko | 4b924f3 | 2007-05-30 00:29:55 +0000 | [diff] [blame] | 2013 | } |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 2014 | fprintf(stderr, "\n"); |
| 2015 | prn++; |
| 2016 | } |
| 2017 | pi = pi->next; |
| 2018 | pin++; |
| 2019 | } |
| 2020 | } |
| 2021 | #endif |
| 2022 | |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 2023 | /* NB: called by pseudo_exec, and therefore must not modify any |
| 2024 | * global data until exec/_exit (we can be a child after vfork!) */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2025 | static int run_list(struct pipe *pi) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2026 | { |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2027 | struct pipe *rpipe; |
| 2028 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2029 | char *for_varname = NULL; |
| 2030 | char **for_lcur = NULL; |
| 2031 | char **for_list = NULL; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2032 | int flag_rep = 0; |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2033 | #endif |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2034 | int flag_skip = 1; |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 2035 | int rcode = 0; /* probably for gcc only */ |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2036 | int flag_restore = 0; |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2037 | #if ENABLE_HUSH_IF |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2038 | int if_code = 0, next_if_code = 0; /* need double-buffer to handle elif */ |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2039 | #else |
| 2040 | enum { if_code = 0, next_if_code = 0 }; |
| 2041 | #endif |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2042 | reserved_style rword; |
| 2043 | reserved_style skip_more_for_this_rword = RES_XXXX; |
Denis Vlasenko | 4ac530c | 2007-05-02 15:35:45 +0000 | [diff] [blame] | 2044 | |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2045 | debug_printf_exec("run_list start lvl %d\n", run_list_level + 1); |
Denis Vlasenko | 4ac530c | 2007-05-02 15:35:45 +0000 | [diff] [blame] | 2046 | |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2047 | #if ENABLE_HUSH_LOOPS |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2048 | /* check syntax for "for" */ |
| 2049 | for (rpipe = pi; rpipe; rpipe = rpipe->next) { |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2050 | if ((rpipe->res_word == RES_IN || rpipe->res_word == RES_FOR) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2051 | && (rpipe->next == NULL) |
| 2052 | ) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 2053 | syntax("malformed for"); /* no IN or no commands after IN */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2054 | debug_printf_exec("run_list lvl %d return 1\n", run_list_level); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2055 | return 1; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2056 | } |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2057 | if ((rpipe->res_word == RES_IN && rpipe->next->res_word == RES_IN && rpipe->next->progs[0].argv != NULL) |
| 2058 | || (rpipe->res_word == RES_FOR && rpipe->next->res_word != RES_IN) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2059 | ) { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2060 | /* TODO: what is tested in the first condition? */ |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 2061 | syntax("malformed for"); /* 2nd condition: not followed by IN */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2062 | debug_printf_exec("run_list lvl %d return 1\n", run_list_level); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2063 | return 1; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2064 | } |
| 2065 | } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2066 | #else |
| 2067 | rpipe = NULL; |
| 2068 | #endif |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2069 | |
| 2070 | #if ENABLE_HUSH_JOB |
| 2071 | /* Example of nested list: "while true; do { sleep 1 | exit 2; } done". |
| 2072 | * We are saving state before entering outermost list ("while...done") |
| 2073 | * so that ctrl-Z will correctly background _entire_ outermost list, |
| 2074 | * not just a part of it (like "sleep 1 | exit 2") */ |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 2075 | if (++run_list_level == 1 && interactive_fd) { |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2076 | if (sigsetjmp(toplevel_jb, 1)) { |
| 2077 | /* ctrl-Z forked and we are parent; or ctrl-C. |
| 2078 | * Sighandler has longjmped us here */ |
| 2079 | signal(SIGINT, SIG_IGN); |
| 2080 | signal(SIGTSTP, SIG_IGN); |
| 2081 | /* Restore level (we can be coming from deep inside |
| 2082 | * nested levels) */ |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 2083 | run_list_level = 1; |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2084 | #if ENABLE_FEATURE_SH_STANDALONE |
| 2085 | if (nofork_save.saved) { /* if save area is valid */ |
| 2086 | debug_printf_jobs("exiting nofork early\n"); |
| 2087 | restore_nofork_data(&nofork_save); |
| 2088 | } |
| 2089 | #endif |
| 2090 | if (ctrl_z_flag) { |
| 2091 | /* ctrl-Z has forked and stored pid of the child in pi->pid. |
| 2092 | * Remember this child as background job */ |
| 2093 | insert_bg_job(pi); |
| 2094 | } else { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2095 | /* ctrl-C. We just stop doing whatever we were doing */ |
Denis Vlasenko | 4daad90 | 2007-09-27 10:20:47 +0000 | [diff] [blame] | 2096 | bb_putchar('\n'); |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2097 | } |
| 2098 | rcode = 0; |
| 2099 | goto ret; |
| 2100 | } |
| 2101 | /* ctrl-Z handler will store pid etc in pi */ |
| 2102 | toplevel_list = pi; |
| 2103 | ctrl_z_flag = 0; |
| 2104 | #if ENABLE_FEATURE_SH_STANDALONE |
| 2105 | nofork_save.saved = 0; /* in case we will run a nofork later */ |
| 2106 | #endif |
Denis Vlasenko | 8e2cfec | 2008-03-12 23:19:35 +0000 | [diff] [blame] | 2107 | signal_SA_RESTART_empty_mask(SIGTSTP, handler_ctrl_z); |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2108 | signal(SIGINT, handler_ctrl_c); |
| 2109 | } |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2110 | #endif /* JOB */ |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2111 | |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 2112 | for (; pi; pi = flag_restore ? rpipe : pi->next) { |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2113 | //why? int save_num_progs; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2114 | rword = pi->res_word; |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2115 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2116 | if (rword == RES_WHILE || rword == RES_UNTIL || rword == RES_FOR) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2117 | flag_restore = 0; |
| 2118 | if (!rpipe) { |
| 2119 | flag_rep = 0; |
| 2120 | rpipe = pi; |
| 2121 | } |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2122 | } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2123 | #endif |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2124 | debug_printf_exec(": rword=%d if_code=%d next_if_code=%d skip_more=%d\n", |
| 2125 | rword, if_code, next_if_code, skip_more_for_this_rword); |
| 2126 | if (rword == skip_more_for_this_rword && flag_skip) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2127 | if (pi->followup == PIPE_SEQ) |
| 2128 | flag_skip = 0; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2129 | continue; |
| 2130 | } |
| 2131 | flag_skip = 1; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2132 | skip_more_for_this_rword = RES_XXXX; |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2133 | #if ENABLE_HUSH_IF |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2134 | if (rword == RES_THEN || rword == RES_ELSE) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2135 | if_code = next_if_code; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2136 | if (rword == RES_THEN && if_code) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2137 | continue; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2138 | if (rword == RES_ELSE && !if_code) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2139 | continue; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2140 | if (rword == RES_ELIF && !if_code) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2141 | break; |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2142 | #endif |
| 2143 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2144 | if (rword == RES_FOR && pi->num_progs) { |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2145 | if (!for_lcur) { |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2146 | /* first loop through for */ |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2147 | /* if no variable values after "in" we skip "for" */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2148 | if (!pi->next->progs->argv) |
| 2149 | continue; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2150 | /* create list of variable values */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2151 | for_list = expand_strvec_to_strvec(pi->next->progs->argv); |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2152 | for_lcur = for_list; |
| 2153 | for_varname = pi->progs->argv[0]; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2154 | pi->progs->argv[0] = NULL; |
| 2155 | flag_rep = 1; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2156 | } |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2157 | free(pi->progs->argv[0]); |
| 2158 | if (!*for_lcur) { |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2159 | /* for loop is over, clean up */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2160 | free(for_list); |
| 2161 | for_lcur = NULL; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2162 | flag_rep = 0; |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2163 | pi->progs->argv[0] = for_varname; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2164 | continue; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2165 | } |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2166 | /* insert next value from for_lcur */ |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 2167 | /* vda: does it need escaping? */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2168 | pi->progs->argv[0] = xasprintf("%s=%s", for_varname, *for_lcur++); |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2169 | } |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2170 | if (rword == RES_IN) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2171 | continue; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2172 | if (rword == RES_DO) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2173 | if (!flag_rep) |
| 2174 | continue; |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 2175 | } |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2176 | if (rword == RES_DONE) { |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2177 | if (flag_rep) { |
| 2178 | flag_restore = 1; |
| 2179 | } else { |
| 2180 | rpipe = NULL; |
| 2181 | } |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2182 | } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2183 | #endif |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2184 | if (pi->num_progs == 0) |
| 2185 | continue; |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2186 | //why? save_num_progs = pi->num_progs; |
| 2187 | debug_printf_exec(": run_pipe with %d members\n", pi->num_progs); |
| 2188 | rcode = run_pipe(pi); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2189 | if (rcode != -1) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2190 | /* We only ran a builtin: rcode was set by the return value |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2191 | * of run_pipe(), and we don't need to wait for anything. */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2192 | } else if (pi->followup == PIPE_BG) { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2193 | /* What does bash do with attempts to background builtins? */ |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2194 | /* Even bash 3.2 doesn't do that well with nested bg: |
| 2195 | * try "{ { sleep 10; echo DEEP; } & echo HERE; } &". |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2196 | * I'm NOT treating inner &'s as jobs */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 2197 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 4b924f3 | 2007-05-30 00:29:55 +0000 | [diff] [blame] | 2198 | if (run_list_level == 1) |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2199 | insert_bg_job(pi); |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 2200 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2201 | rcode = EXIT_SUCCESS; |
| 2202 | } else { |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 2203 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 2204 | if (run_list_level == 1 && interactive_fd) { |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2205 | /* waits for completion, then fg's main shell */ |
Denis Vlasenko | 52881e9 | 2007-04-21 13:42:52 +0000 | [diff] [blame] | 2206 | rcode = checkjobs_and_fg_shell(pi); |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 2207 | } else |
| 2208 | #endif |
| 2209 | { |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2210 | /* this one just waits for completion */ |
Eric Andersen | c798b07 | 2001-06-22 06:23:03 +0000 | [diff] [blame] | 2211 | rcode = checkjobs(pi); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2212 | } |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2213 | debug_printf_exec(": checkjobs returned %d\n", rcode); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2214 | } |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2215 | debug_printf_exec(": setting last_return_code=%d\n", rcode); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2216 | last_return_code = rcode; |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2217 | //why? pi->num_progs = save_num_progs; |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2218 | #if ENABLE_HUSH_IF |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2219 | if (rword == RES_IF || rword == RES_ELIF) |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2220 | next_if_code = rcode; /* can be overwritten a number of times */ |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2221 | #endif |
| 2222 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2223 | if (rword == RES_WHILE) |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2224 | flag_rep = !last_return_code; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2225 | if (rword == RES_UNTIL) |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2226 | flag_rep = last_return_code; |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2227 | #endif |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2228 | if ((rcode == EXIT_SUCCESS && pi->followup == PIPE_OR) |
| 2229 | || (rcode != EXIT_SUCCESS && pi->followup == PIPE_AND) |
| 2230 | ) { |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2231 | skip_more_for_this_rword = rword; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2232 | } |
Eric Andersen | 028b65b | 2001-06-28 01:10:11 +0000 | [diff] [blame] | 2233 | checkjobs(NULL); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2234 | } |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2235 | |
| 2236 | #if ENABLE_HUSH_JOB |
| 2237 | if (ctrl_z_flag) { |
| 2238 | /* ctrl-Z forked somewhere in the past, we are the child, |
| 2239 | * and now we completed running the list. Exit. */ |
| 2240 | exit(rcode); |
| 2241 | } |
| 2242 | ret: |
Denis Vlasenko | ba7cf26 | 2007-05-25 14:34:30 +0000 | [diff] [blame] | 2243 | if (!--run_list_level && interactive_fd) { |
| 2244 | signal(SIGTSTP, SIG_IGN); |
| 2245 | signal(SIGINT, SIG_IGN); |
| 2246 | } |
Denis Vlasenko | ac0e5ab | 2007-05-04 21:37:27 +0000 | [diff] [blame] | 2247 | #endif |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2248 | debug_printf_exec("run_list lvl %d return %d\n", run_list_level + 1, rcode); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2249 | return rcode; |
| 2250 | } |
| 2251 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2252 | /* return code is the exit status of the pipe */ |
Eric Andersen | bf7df04 | 2001-05-23 22:18:35 +0000 | [diff] [blame] | 2253 | static int free_pipe(struct pipe *pi, int indent) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2254 | { |
| 2255 | char **p; |
| 2256 | struct child_prog *child; |
| 2257 | struct redir_struct *r, *rnext; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2258 | int a, i, ret_code = 0; |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 2259 | |
| 2260 | if (pi->stopped_progs > 0) |
| 2261 | return ret_code; |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2262 | debug_printf_clean("%s run pipe: (pid %d)\n", indenter(indent), getpid()); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2263 | for (i = 0; i < pi->num_progs; i++) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2264 | child = &pi->progs[i]; |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2265 | debug_printf_clean("%s command %d:\n", indenter(indent), i); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2266 | if (child->argv) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2267 | for (a = 0, p = child->argv; *p; a++, p++) { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2268 | debug_printf_clean("%s argv[%d] = %s\n", indenter(indent), a, *p); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2269 | } |
Denis Vlasenko | f962a03 | 2007-11-23 12:50:54 +0000 | [diff] [blame] | 2270 | free_strings(child->argv); |
| 2271 | child->argv = NULL; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2272 | } else if (child->group) { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2273 | debug_printf_clean("%s begin group (subshell:%d)\n", indenter(indent), child->subshell); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2274 | ret_code = free_pipe_list(child->group, indent+3); |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2275 | debug_printf_clean("%s end group\n", indenter(indent)); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2276 | } else { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2277 | debug_printf_clean("%s (nil)\n", indenter(indent)); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2278 | } |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2279 | for (r = child->redirects; r; r = rnext) { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2280 | debug_printf_clean("%s redirect %d%s", indenter(indent), r->fd, redir_table[r->type].descrip); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2281 | if (r->dup == -1) { |
Eric Andersen | 817e73c | 2001-06-06 17:56:09 +0000 | [diff] [blame] | 2282 | /* guard against the case >$FOO, where foo is unset or blank */ |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2283 | if (r->glob_word) { |
| 2284 | debug_printf_clean(" %s\n", r->glob_word[0]); |
| 2285 | free_strings(r->glob_word); |
| 2286 | r->glob_word = NULL; |
Eric Andersen | 817e73c | 2001-06-06 17:56:09 +0000 | [diff] [blame] | 2287 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2288 | } else { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2289 | debug_printf_clean("&%d\n", r->dup); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2290 | } |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2291 | rnext = r->next; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2292 | free(r); |
| 2293 | } |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2294 | child->redirects = NULL; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2295 | } |
| 2296 | free(pi->progs); /* children are an array, they get freed all at once */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2297 | pi->progs = NULL; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 2298 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 2299 | free(pi->cmdtext); |
| 2300 | pi->cmdtext = NULL; |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 2301 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2302 | return ret_code; |
| 2303 | } |
| 2304 | |
Eric Andersen | bf7df04 | 2001-05-23 22:18:35 +0000 | [diff] [blame] | 2305 | static int free_pipe_list(struct pipe *head, int indent) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2306 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2307 | int rcode = 0; /* if list has no members */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2308 | struct pipe *pi, *next; |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2309 | |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2310 | for (pi = head; pi; pi = next) { |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2311 | debug_printf_clean("%s pipe reserved mode %d\n", indenter(indent), pi->res_word); |
Eric Andersen | bf7df04 | 2001-05-23 22:18:35 +0000 | [diff] [blame] | 2312 | rcode = free_pipe(pi, indent); |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2313 | debug_printf_clean("%s pipe followup code %d\n", indenter(indent), pi->followup); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2314 | next = pi->next; |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 2315 | /*pi->next = NULL;*/ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2316 | free(pi); |
| 2317 | } |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2318 | return rcode; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2319 | } |
| 2320 | |
| 2321 | /* Select which version we will use */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2322 | static int run_and_free_list(struct pipe *pi) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2323 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2324 | int rcode = 0; |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2325 | debug_printf_exec("run_and_free_list entered\n"); |
| 2326 | if (!fake_mode) { |
| 2327 | debug_printf_exec(": run_list with %d members\n", pi->num_progs); |
| 2328 | rcode = run_list(pi); |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2329 | } |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 2330 | /* free_pipe_list has the side effect of clearing memory. |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2331 | * In the long run that function can be merged with run_list, |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2332 | * but doing that now would hobble the debugging effort. */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 2333 | free_pipe_list(pi, /* indent: */ 0); |
| 2334 | debug_printf_exec("run_nad_free_list return %d\n", rcode); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2335 | return rcode; |
| 2336 | } |
| 2337 | |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 2338 | /* Whoever decided to muck with glob internal data is AN IDIOT! */ |
| 2339 | /* uclibc happily changed the way it works (and it has rights to do so!), |
| 2340 | all hell broke loose (SEGVs) */ |
| 2341 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2342 | /* The API for glob is arguably broken. This routine pushes a non-matching |
| 2343 | * string into the output structure, removing non-backslashed backslashes. |
| 2344 | * If someone can prove me wrong, by performing this function within the |
| 2345 | * original glob(3) api, feel free to rewrite this routine into oblivion. |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2346 | * XXX broken if the last character is '\\', check that before calling. |
| 2347 | */ |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2348 | static char **globhack(const char *src, char **strings) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2349 | { |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2350 | int cnt; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2351 | const char *s; |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2352 | char *v, *dest; |
| 2353 | |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2354 | for (cnt = 1, s = src; s && *s; s++) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2355 | if (*s == '\\') s++; |
| 2356 | cnt++; |
| 2357 | } |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2358 | v = dest = xmalloc(cnt); |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2359 | for (s = src; s && *s; s++, dest++) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2360 | if (*s == '\\') s++; |
| 2361 | *dest = *s; |
| 2362 | } |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2363 | *dest = '\0'; |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2364 | |
| 2365 | return add_string_to_strings(strings, v); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2366 | } |
| 2367 | |
| 2368 | /* XXX broken if the last character is '\\', check that before calling */ |
| 2369 | static int glob_needed(const char *s) |
| 2370 | { |
| 2371 | for (; *s; s++) { |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2372 | if (*s == '\\') |
| 2373 | s++; |
| 2374 | if (strchr("*[?", *s)) |
| 2375 | return 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2376 | } |
| 2377 | return 0; |
| 2378 | } |
| 2379 | |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2380 | static int xglob(o_string *dest, char ***pglob) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2381 | { |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 2382 | /* short-circuit for null word */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2383 | /* we can code this better when the debug_printf's are gone */ |
Tim Riker | c1ef7bd | 2006-01-25 00:08:53 +0000 | [diff] [blame] | 2384 | if (dest->length == 0) { |
| 2385 | if (dest->nonnull) { |
| 2386 | /* bash man page calls this an "explicit" null */ |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2387 | *pglob = globhack(dest->data, *pglob); |
| 2388 | } |
| 2389 | return 0; |
| 2390 | } |
| 2391 | |
| 2392 | if (glob_needed(dest->data)) { |
| 2393 | glob_t globdata; |
| 2394 | int gr; |
| 2395 | |
| 2396 | memset(&globdata, 0, sizeof(globdata)); |
| 2397 | gr = glob(dest->data, 0, NULL, &globdata); |
| 2398 | debug_printf("glob returned %d\n", gr); |
| 2399 | if (gr == GLOB_NOSPACE) |
| 2400 | bb_error_msg_and_die("out of memory during glob"); |
| 2401 | if (gr == GLOB_NOMATCH) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2402 | debug_printf("globhack returned %d\n", gr); |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2403 | /* quote removal, or more accurately, backslash removal */ |
| 2404 | *pglob = globhack(dest->data, *pglob); |
Denis Vlasenko | f962a03 | 2007-11-23 12:50:54 +0000 | [diff] [blame] | 2405 | globfree(&globdata); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2406 | return 0; |
| 2407 | } |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2408 | if (gr != 0) { /* GLOB_ABORTED ? */ |
| 2409 | bb_error_msg("glob(3) error %d", gr); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2410 | } |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2411 | if (globdata.gl_pathv && globdata.gl_pathv[0]) |
| 2412 | *pglob = add_strings_to_strings(1, *pglob, globdata.gl_pathv); |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2413 | globfree(&globdata); |
| 2414 | return gr; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2415 | } |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2416 | |
| 2417 | *pglob = globhack(dest->data, *pglob); |
| 2418 | return 0; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2419 | } |
| 2420 | |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2421 | /* expand_strvec_to_strvec() takes a list of strings, expands |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2422 | * all variable references within and returns a pointer to |
| 2423 | * a list of expanded strings, possibly with larger number |
| 2424 | * of strings. (Think VAR="a b"; echo $VAR). |
| 2425 | * This new list is allocated as a single malloc block. |
| 2426 | * NULL-terminated list of char* pointers is at the beginning of it, |
| 2427 | * followed by strings themself. |
| 2428 | * Caller can deallocate entire list by single free(list). */ |
| 2429 | |
| 2430 | /* Helpers first: |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 2431 | * count_XXX estimates size of the block we need. It's okay |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2432 | * to over-estimate sizes a bit, if it makes code simpler */ |
| 2433 | static int count_ifs(const char *str) |
| 2434 | { |
| 2435 | int cnt = 0; |
| 2436 | debug_printf_expand("count_ifs('%s') ifs='%s'", str, ifs); |
| 2437 | while (1) { |
| 2438 | str += strcspn(str, ifs); |
| 2439 | if (!*str) break; |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 2440 | str++; /* str += strspn(str, ifs); */ |
| 2441 | cnt++; /* cnt += strspn(str, ifs); - but this code is larger */ |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 2442 | } |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2443 | debug_printf_expand(" return %d\n", cnt); |
| 2444 | return cnt; |
| 2445 | } |
| 2446 | |
| 2447 | static void count_var_expansion_space(int *countp, int *lenp, char *arg) |
| 2448 | { |
| 2449 | char first_ch; |
| 2450 | int i; |
| 2451 | int len = *lenp; |
| 2452 | int count = *countp; |
| 2453 | const char *val; |
| 2454 | char *p; |
| 2455 | |
| 2456 | while ((p = strchr(arg, SPECIAL_VAR_SYMBOL))) { |
| 2457 | len += p - arg; |
| 2458 | arg = ++p; |
| 2459 | p = strchr(p, SPECIAL_VAR_SYMBOL); |
| 2460 | first_ch = arg[0]; |
| 2461 | |
| 2462 | switch (first_ch & 0x7f) { |
| 2463 | /* high bit in 1st_ch indicates that var is double-quoted */ |
| 2464 | case '$': /* pid */ |
| 2465 | case '!': /* bg pid */ |
| 2466 | case '?': /* exitcode */ |
| 2467 | case '#': /* argc */ |
| 2468 | len += sizeof(int)*3 + 1; /* enough for int */ |
| 2469 | break; |
| 2470 | case '*': |
| 2471 | case '@': |
Denis Vlasenko | c3c6659 | 2007-11-24 00:22:42 +0000 | [diff] [blame] | 2472 | for (i = 1; global_argv[i]; i++) { |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2473 | len += strlen(global_argv[i]) + 1; |
| 2474 | count++; |
| 2475 | if (!(first_ch & 0x80)) |
| 2476 | count += count_ifs(global_argv[i]); |
| 2477 | } |
| 2478 | break; |
| 2479 | default: |
| 2480 | *p = '\0'; |
| 2481 | arg[0] = first_ch & 0x7f; |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 2482 | if (isdigit(arg[0])) { |
| 2483 | i = xatoi_u(arg); |
| 2484 | val = NULL; |
| 2485 | if (i < global_argc) |
| 2486 | val = global_argv[i]; |
| 2487 | } else |
| 2488 | val = lookup_param(arg); |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2489 | arg[0] = first_ch; |
| 2490 | *p = SPECIAL_VAR_SYMBOL; |
| 2491 | |
| 2492 | if (val) { |
| 2493 | len += strlen(val) + 1; |
| 2494 | if (!(first_ch & 0x80)) |
| 2495 | count += count_ifs(val); |
| 2496 | } |
| 2497 | } |
| 2498 | arg = ++p; |
| 2499 | } |
| 2500 | |
| 2501 | len += strlen(arg) + 1; |
| 2502 | count++; |
| 2503 | *lenp = len; |
| 2504 | *countp = count; |
| 2505 | } |
| 2506 | |
| 2507 | /* Store given string, finalizing the word and starting new one whenever |
| 2508 | * we encounter ifs char(s). This is used for expanding variable values. |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 2509 | * End-of-string does NOT finalize word: think about 'echo -$VAR-' */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2510 | static int expand_on_ifs(char **list, int n, char **posp, const char *str) |
| 2511 | { |
| 2512 | char *pos = *posp; |
| 2513 | while (1) { |
| 2514 | int word_len = strcspn(str, ifs); |
| 2515 | if (word_len) { |
| 2516 | memcpy(pos, str, word_len); /* store non-ifs chars */ |
| 2517 | pos += word_len; |
| 2518 | str += word_len; |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2519 | } |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 2520 | if (!*str) /* EOL - do not finalize word */ |
| 2521 | break; |
| 2522 | *pos++ = '\0'; |
| 2523 | if (n) debug_printf_expand("expand_on_ifs finalized list[%d]=%p '%s' " |
| 2524 | "strlen=%d next=%p pos=%p\n", n-1, list[n-1], list[n-1], |
| 2525 | strlen(list[n-1]), list[n-1] + strlen(list[n-1]) + 1, pos); |
| 2526 | list[n++] = pos; |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2527 | str += strspn(str, ifs); /* skip ifs chars */ |
| 2528 | } |
| 2529 | *posp = pos; |
| 2530 | return n; |
| 2531 | } |
| 2532 | |
| 2533 | /* Expand all variable references in given string, adding words to list[] |
| 2534 | * at n, n+1,... positions. Return updated n (so that list[n] is next one |
| 2535 | * to be filled). This routine is extremely tricky: has to deal with |
| 2536 | * variables/parameters with whitespace, $* and $@, and constructs like |
| 2537 | * 'echo -$*-'. If you play here, you must run testsuite afterwards! */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2538 | /* NB: another bug is that we cannot detect empty strings yet: |
| 2539 | * "" or $empty"" expands to zero words, has to expand to empty word */ |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2540 | static int expand_vars_to_list(char **list, int n, char **posp, char *arg, char or_mask) |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2541 | { |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2542 | /* or_mask is either 0 (normal case) or 0x80 |
| 2543 | * (expansion of right-hand side of assignment == 1-element expand) */ |
| 2544 | |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2545 | char first_ch, ored_ch; |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2546 | int i; |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2547 | const char *val; |
| 2548 | char *p; |
| 2549 | char *pos = *posp; |
| 2550 | |
| 2551 | ored_ch = 0; |
| 2552 | |
| 2553 | if (n) debug_printf_expand("expand_vars_to_list finalized list[%d]=%p '%s' " |
| 2554 | "strlen=%d next=%p pos=%p\n", n-1, list[n-1], list[n-1], |
| 2555 | strlen(list[n-1]), list[n-1] + strlen(list[n-1]) + 1, pos); |
| 2556 | list[n++] = pos; |
| 2557 | |
| 2558 | while ((p = strchr(arg, SPECIAL_VAR_SYMBOL))) { |
| 2559 | memcpy(pos, arg, p - arg); |
| 2560 | pos += (p - arg); |
| 2561 | arg = ++p; |
| 2562 | p = strchr(p, SPECIAL_VAR_SYMBOL); |
| 2563 | |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2564 | first_ch = arg[0] | or_mask; /* forced to "quoted" if or_mask = 0x80 */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2565 | ored_ch |= first_ch; |
| 2566 | val = NULL; |
| 2567 | switch (first_ch & 0x7f) { |
| 2568 | /* Highest bit in first_ch indicates that var is double-quoted */ |
| 2569 | case '$': /* pid */ |
| 2570 | /* FIXME: (echo $$) should still print pid of main shell */ |
Denis Vlasenko | c04163a | 2008-02-11 08:30:53 +0000 | [diff] [blame] | 2571 | val = utoa(getpid()); /* rootpid? */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2572 | break; |
| 2573 | case '!': /* bg pid */ |
| 2574 | val = last_bg_pid ? utoa(last_bg_pid) : (char*)""; |
| 2575 | break; |
| 2576 | case '?': /* exitcode */ |
| 2577 | val = utoa(last_return_code); |
| 2578 | break; |
| 2579 | case '#': /* argc */ |
| 2580 | val = utoa(global_argc ? global_argc-1 : 0); |
| 2581 | break; |
| 2582 | case '*': |
| 2583 | case '@': |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2584 | i = 1; |
Denis Vlasenko | c3c6659 | 2007-11-24 00:22:42 +0000 | [diff] [blame] | 2585 | if (!global_argv[i]) |
| 2586 | break; |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2587 | if (!(first_ch & 0x80)) { /* unquoted $* or $@ */ |
Denis Vlasenko | c3c6659 | 2007-11-24 00:22:42 +0000 | [diff] [blame] | 2588 | while (global_argv[i]) { |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2589 | n = expand_on_ifs(list, n, &pos, global_argv[i]); |
| 2590 | debug_printf_expand("expand_vars_to_list: argv %d (last %d)\n", i, global_argc-1); |
Denis Vlasenko | c3c6659 | 2007-11-24 00:22:42 +0000 | [diff] [blame] | 2591 | if (global_argv[i++][0] && global_argv[i]) { |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2592 | /* this argv[] is not empty and not last: |
| 2593 | * put terminating NUL, start new word */ |
| 2594 | *pos++ = '\0'; |
| 2595 | if (n) debug_printf_expand("expand_vars_to_list 2 finalized list[%d]=%p '%s' " |
| 2596 | "strlen=%d next=%p pos=%p\n", n-1, list[n-1], list[n-1], |
| 2597 | strlen(list[n-1]), list[n-1] + strlen(list[n-1]) + 1, pos); |
| 2598 | list[n++] = pos; |
| 2599 | } |
| 2600 | } |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2601 | } else |
| 2602 | /* If or_mask is nonzero, we handle assignment 'a=....$@.....' |
Denis Vlasenko | cccdc4e | 2007-11-23 21:08:38 +0000 | [diff] [blame] | 2603 | * and in this case should treat it like '$*' - see 'else...' below */ |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2604 | if (first_ch == ('@'|0x80) && !or_mask) { /* quoted $@ */ |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2605 | while (1) { |
| 2606 | strcpy(pos, global_argv[i]); |
| 2607 | pos += strlen(global_argv[i]); |
| 2608 | if (++i >= global_argc) |
| 2609 | break; |
| 2610 | *pos++ = '\0'; |
| 2611 | if (n) debug_printf_expand("expand_vars_to_list 3 finalized list[%d]=%p '%s' " |
| 2612 | "strlen=%d next=%p pos=%p\n", n-1, list[n-1], list[n-1], |
| 2613 | strlen(list[n-1]), list[n-1] + strlen(list[n-1]) + 1, pos); |
| 2614 | list[n++] = pos; |
| 2615 | } |
| 2616 | } else { /* quoted $*: add as one word */ |
Denis Vlasenko | c3c6659 | 2007-11-24 00:22:42 +0000 | [diff] [blame] | 2617 | while (1) { |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2618 | strcpy(pos, global_argv[i]); |
| 2619 | pos += strlen(global_argv[i]); |
Denis Vlasenko | cccdc4e | 2007-11-23 21:08:38 +0000 | [diff] [blame] | 2620 | if (!global_argv[++i]) |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2621 | break; |
| 2622 | if (ifs[0]) |
| 2623 | *pos++ = ifs[0]; |
| 2624 | } |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2625 | } |
| 2626 | break; |
| 2627 | default: |
| 2628 | *p = '\0'; |
| 2629 | arg[0] = first_ch & 0x7f; |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 2630 | if (isdigit(arg[0])) { |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2631 | i = xatoi_u(arg); |
Denis Vlasenko | 764d59d | 2007-05-14 16:23:23 +0000 | [diff] [blame] | 2632 | val = NULL; |
| 2633 | if (i < global_argc) |
| 2634 | val = global_argv[i]; |
| 2635 | } else |
| 2636 | val = lookup_param(arg); |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2637 | arg[0] = first_ch; |
| 2638 | *p = SPECIAL_VAR_SYMBOL; |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2639 | if (!(first_ch & 0x80)) { /* unquoted $VAR */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2640 | if (val) { |
| 2641 | n = expand_on_ifs(list, n, &pos, val); |
| 2642 | val = NULL; |
| 2643 | } |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 2644 | } /* else: quoted $VAR, val will be appended at pos */ |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2645 | } |
| 2646 | if (val) { |
| 2647 | strcpy(pos, val); |
| 2648 | pos += strlen(val); |
| 2649 | } |
| 2650 | arg = ++p; |
| 2651 | } |
| 2652 | debug_printf_expand("expand_vars_to_list adding tail '%s' at %p\n", arg, pos); |
| 2653 | strcpy(pos, arg); |
| 2654 | pos += strlen(arg) + 1; |
| 2655 | if (pos == list[n-1] + 1) { /* expansion is empty */ |
| 2656 | if (!(ored_ch & 0x80)) { /* all vars were not quoted... */ |
| 2657 | debug_printf_expand("expand_vars_to_list list[%d] empty, going back\n", n); |
| 2658 | pos--; |
| 2659 | n--; |
| 2660 | } |
| 2661 | } |
| 2662 | |
| 2663 | *posp = pos; |
| 2664 | return n; |
| 2665 | } |
| 2666 | |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2667 | static char **expand_variables(char **argv, char or_mask) |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2668 | { |
| 2669 | int n; |
| 2670 | int count = 1; |
| 2671 | int len = 0; |
| 2672 | char *pos, **v, **list; |
| 2673 | |
| 2674 | v = argv; |
| 2675 | if (!*v) debug_printf_expand("count_var_expansion_space: " |
| 2676 | "argv[0]=NULL count=%d len=%d alloc_space=%d\n", |
| 2677 | count, len, sizeof(char*) * count + len); |
| 2678 | while (*v) { |
| 2679 | count_var_expansion_space(&count, &len, *v); |
| 2680 | debug_printf_expand("count_var_expansion_space: " |
| 2681 | "'%s' count=%d len=%d alloc_space=%d\n", |
| 2682 | *v, count, len, sizeof(char*) * count + len); |
| 2683 | v++; |
| 2684 | } |
| 2685 | len += sizeof(char*) * count; /* total to alloc */ |
| 2686 | list = xmalloc(len); |
| 2687 | pos = (char*)(list + count); |
| 2688 | debug_printf_expand("list=%p, list[0] should be %p\n", list, pos); |
| 2689 | n = 0; |
| 2690 | v = argv; |
| 2691 | while (*v) |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2692 | n = expand_vars_to_list(list, n, &pos, *v++, or_mask); |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2693 | |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2694 | if (n) debug_printf_expand("finalized list[%d]=%p '%s' " |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2695 | "strlen=%d next=%p pos=%p\n", n-1, list[n-1], list[n-1], |
| 2696 | strlen(list[n-1]), list[n-1] + strlen(list[n-1]) + 1, pos); |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 2697 | list[n] = NULL; |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2698 | |
| 2699 | #ifdef DEBUG_EXPAND |
| 2700 | { |
| 2701 | int m = 0; |
| 2702 | while (m <= n) { |
| 2703 | debug_printf_expand("list[%d]=%p '%s'\n", m, list[m], list[m]); |
| 2704 | m++; |
| 2705 | } |
| 2706 | debug_printf_expand("used_space=%d\n", pos - (char*)list); |
| 2707 | } |
| 2708 | #endif |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2709 | if (ENABLE_HUSH_DEBUG) |
| 2710 | if (pos - (char*)list > len) |
| 2711 | bb_error_msg_and_die("BUG in varexp"); |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 2712 | return list; |
| 2713 | } |
| 2714 | |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2715 | static char **expand_strvec_to_strvec(char **argv) |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 2716 | { |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2717 | return expand_variables(argv, 0); |
Denis Vlasenko | 87cb2db | 2007-04-21 10:00:01 +0000 | [diff] [blame] | 2718 | } |
| 2719 | |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2720 | static char *expand_string_to_string(const char *str) |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2721 | { |
| 2722 | char *argv[2], **list; |
| 2723 | |
| 2724 | argv[0] = (char*)str; |
| 2725 | argv[1] = NULL; |
| 2726 | list = expand_variables(argv, 0x80); /* 0x80: make one-element expansion */ |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2727 | if (ENABLE_HUSH_DEBUG) |
| 2728 | if (!list[0] || list[1]) |
| 2729 | bb_error_msg_and_die("BUG in varexp2"); |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2730 | /* actually, just move string 2*sizeof(char*) bytes back */ |
| 2731 | strcpy((char*)list, list[0]); |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 2732 | debug_printf_expand("string_to_string='%s'\n", (char*)list); |
| 2733 | return (char*)list; |
| 2734 | } |
| 2735 | |
| 2736 | static char* expand_strvec_to_string(char **argv) |
| 2737 | { |
| 2738 | char **list; |
| 2739 | |
| 2740 | list = expand_variables(argv, 0x80); |
| 2741 | /* Convert all NULs to spaces */ |
| 2742 | if (list[0]) { |
| 2743 | int n = 1; |
| 2744 | while (list[n]) { |
| 2745 | if (ENABLE_HUSH_DEBUG) |
| 2746 | if (list[n-1] + strlen(list[n-1]) + 1 != list[n]) |
| 2747 | bb_error_msg_and_die("BUG in varexp3"); |
| 2748 | list[n][-1] = ' '; /* TODO: or to ifs[0]? */ |
| 2749 | n++; |
| 2750 | } |
| 2751 | } |
| 2752 | strcpy((char*)list, list[0]); |
| 2753 | debug_printf_expand("strvec_to_string='%s'\n", (char*)list); |
Denis Vlasenko | b6a741f | 2007-05-17 14:38:17 +0000 | [diff] [blame] | 2754 | return (char*)list; |
| 2755 | } |
Denis Vlasenko | 03eb8bf | 2007-05-14 16:19:34 +0000 | [diff] [blame] | 2756 | |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 2757 | /* This is used to get/check local shell variables */ |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2758 | static struct variable *get_local_var(const char *name) |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 2759 | { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2760 | struct variable *cur; |
| 2761 | int len; |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 2762 | |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2763 | if (!name) |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 2764 | return NULL; |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2765 | len = strlen(name); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2766 | for (cur = top_var; cur; cur = cur->next) { |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2767 | if (strncmp(cur->varstr, name, len) == 0 && cur->varstr[len] == '=') |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2768 | return cur; |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 2769 | } |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 2770 | return NULL; |
| 2771 | } |
| 2772 | |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2773 | /* str holds "NAME=VAL" and is expected to be malloced. |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2774 | * We take ownership of it. */ |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2775 | static int set_local_var(char *str, int flg_export) |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 2776 | { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2777 | struct variable *cur; |
| 2778 | char *value; |
| 2779 | int name_len; |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2780 | |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2781 | value = strchr(str, '='); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2782 | if (!value) { /* not expected to ever happen? */ |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2783 | free(str); |
Eric Andersen | 9978576 | 2001-05-22 21:37:48 +0000 | [diff] [blame] | 2784 | return -1; |
| 2785 | } |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2786 | |
Denis Vlasenko | 201c72a | 2007-05-25 10:00:36 +0000 | [diff] [blame] | 2787 | name_len = value - str + 1; /* including '=' */ |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2788 | cur = top_var; /* cannot be NULL (we have HUSH_VERSION and it's RO) */ |
| 2789 | while (1) { |
Denis Vlasenko | 201c72a | 2007-05-25 10:00:36 +0000 | [diff] [blame] | 2790 | if (strncmp(cur->varstr, str, name_len) != 0) { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2791 | if (!cur->next) { |
Denis Vlasenko | 201c72a | 2007-05-25 10:00:36 +0000 | [diff] [blame] | 2792 | /* Bail out. Note that now cur points |
| 2793 | * to last var in linked list */ |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2794 | break; |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2795 | } |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2796 | cur = cur->next; |
| 2797 | continue; |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2798 | } |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2799 | /* We found an existing var with this name */ |
| 2800 | *value = '\0'; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2801 | if (cur->flg_read_only) { |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2802 | bb_error_msg("%s: readonly variable", str); |
| 2803 | free(str); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2804 | return -1; |
| 2805 | } |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2806 | unsetenv(str); /* just in case */ |
| 2807 | *value = '='; |
| 2808 | if (strcmp(cur->varstr, str) == 0) { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2809 | free_and_exp: |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2810 | free(str); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2811 | goto exp; |
| 2812 | } |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2813 | if (cur->max_len >= strlen(str)) { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2814 | /* This one is from startup env, reuse space */ |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2815 | strcpy(cur->varstr, str); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2816 | goto free_and_exp; |
| 2817 | } |
| 2818 | /* max_len == 0 signifies "malloced" var, which we can |
| 2819 | * (and has to) free */ |
| 2820 | if (!cur->max_len) |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2821 | free(cur->varstr); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2822 | cur->max_len = 0; |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2823 | goto set_str_and_exp; |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 2824 | } |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2825 | |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2826 | /* Not found - create next variable struct */ |
| 2827 | cur->next = xzalloc(sizeof(*cur)); |
| 2828 | cur = cur->next; |
| 2829 | |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2830 | set_str_and_exp: |
| 2831 | cur->varstr = str; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2832 | exp: |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2833 | if (flg_export) |
| 2834 | cur->flg_export = 1; |
| 2835 | if (cur->flg_export) |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2836 | return putenv(cur->varstr); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2837 | return 0; |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2838 | } |
| 2839 | |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 2840 | static void unset_local_var(const char *name) |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2841 | { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2842 | struct variable *cur; |
| 2843 | struct variable *prev = prev; /* for gcc */ |
| 2844 | int name_len; |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2845 | |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 2846 | if (!name) |
| 2847 | return; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2848 | name_len = strlen(name); |
| 2849 | cur = top_var; |
| 2850 | while (cur) { |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2851 | if (strncmp(cur->varstr, name, name_len) == 0 && cur->varstr[name_len] == '=') { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2852 | if (cur->flg_read_only) { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 2853 | bb_error_msg("%s: readonly variable", name); |
Eric Andersen | 94ac244 | 2001-05-22 19:05:18 +0000 | [diff] [blame] | 2854 | return; |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 2855 | } |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2856 | /* prev is ok to use here because 1st variable, HUSH_VERSION, |
| 2857 | * is ro, and we cannot reach this code on the 1st pass */ |
| 2858 | prev->next = cur->next; |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2859 | unsetenv(cur->varstr); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2860 | if (!cur->max_len) |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 2861 | free(cur->varstr); |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 2862 | free(cur); |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 2863 | return; |
Eric Andersen | f72f562 | 2001-05-15 23:21:41 +0000 | [diff] [blame] | 2864 | } |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 2865 | prev = cur; |
| 2866 | cur = cur->next; |
Eric Andersen | 20a69a7 | 2001-05-15 17:24:44 +0000 | [diff] [blame] | 2867 | } |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 2868 | } |
| 2869 | |
| 2870 | static int is_assignment(const char *s) |
| 2871 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2872 | if (!s || !isalpha(*s)) |
| 2873 | return 0; |
| 2874 | s++; |
| 2875 | while (isalnum(*s) || *s == '_') |
| 2876 | s++; |
| 2877 | return *s == '='; |
Eric Andersen | 78a7c99 | 2001-05-15 16:30:25 +0000 | [diff] [blame] | 2878 | } |
| 2879 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2880 | /* the src parameter allows us to peek forward to a possible &n syntax |
| 2881 | * for file descriptor duplication, e.g., "2>&1". |
| 2882 | * Return code is 0 normally, 1 if a syntax error is detected in src. |
| 2883 | * Resource errors (in xmalloc) cause the process to exit */ |
| 2884 | static int setup_redirect(struct p_context *ctx, int fd, redir_type style, |
| 2885 | struct in_str *input) |
| 2886 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2887 | struct child_prog *child = ctx->child; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2888 | struct redir_struct *redir = child->redirects; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2889 | struct redir_struct *last_redir = NULL; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2890 | |
| 2891 | /* Create a new redir_struct and drop it onto the end of the linked list */ |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2892 | while (redir) { |
| 2893 | last_redir = redir; |
| 2894 | redir = redir->next; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2895 | } |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 2896 | redir = xzalloc(sizeof(struct redir_struct)); |
| 2897 | /* redir->next = NULL; */ |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 2898 | /* redir->glob_word = NULL; */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2899 | if (last_redir) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2900 | last_redir->next = redir; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2901 | } else { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2902 | child->redirects = redir; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2903 | } |
| 2904 | |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2905 | redir->type = style; |
| 2906 | redir->fd = (fd == -1) ? redir_table[style].default_fd : fd; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2907 | |
| 2908 | debug_printf("Redirect type %d%s\n", redir->fd, redir_table[style].descrip); |
| 2909 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 2910 | /* Check for a '2>&1' type redirect */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2911 | redir->dup = redirect_dup_num(input); |
| 2912 | if (redir->dup == -2) return 1; /* syntax error */ |
| 2913 | if (redir->dup != -1) { |
| 2914 | /* Erik had a check here that the file descriptor in question |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 2915 | * is legit; I postpone that to "run time" |
| 2916 | * A "-" representation of "close me" shows up as a -3 here */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2917 | debug_printf("Duplicating redirect '%d>&%d'\n", redir->fd, redir->dup); |
| 2918 | } else { |
| 2919 | /* We do _not_ try to open the file that src points to, |
| 2920 | * since we need to return and let src be expanded first. |
| 2921 | * Set ctx->pending_redirect, so we know what to do at the |
Denis Vlasenko | 201c72a | 2007-05-25 10:00:36 +0000 | [diff] [blame] | 2922 | * end of the next parsed word. */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2923 | ctx->pending_redirect = redir; |
| 2924 | } |
| 2925 | return 0; |
| 2926 | } |
| 2927 | |
Denis Vlasenko | ac678ec | 2007-04-16 22:32:04 +0000 | [diff] [blame] | 2928 | static struct pipe *new_pipe(void) |
| 2929 | { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2930 | struct pipe *pi; |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 2931 | pi = xzalloc(sizeof(struct pipe)); |
| 2932 | /*pi->num_progs = 0;*/ |
| 2933 | /*pi->progs = NULL;*/ |
| 2934 | /*pi->next = NULL;*/ |
| 2935 | /*pi->followup = 0; invalid */ |
| 2936 | if (RES_NONE) |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 2937 | pi->res_word = RES_NONE; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2938 | return pi; |
| 2939 | } |
| 2940 | |
| 2941 | static void initialize_context(struct p_context *ctx) |
| 2942 | { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2943 | ctx->child = NULL; |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 2944 | ctx->pipe = ctx->list_head = new_pipe(); |
| 2945 | ctx->pending_redirect = NULL; |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 2946 | ctx->res_w = RES_NONE; |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 2947 | //only ctx->parse_type is not touched... is this intentional? |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 2948 | ctx->old_flag = 0; |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 2949 | ctx->stack = NULL; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2950 | done_command(ctx); /* creates the memory for working child */ |
| 2951 | } |
| 2952 | |
| 2953 | /* normal return is 0 |
| 2954 | * if a reserved word is found, and processed, return 1 |
| 2955 | * should handle if, then, elif, else, fi, for, while, until, do, done. |
| 2956 | * case, function, and select are obnoxious, save those for later. |
| 2957 | */ |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2958 | #if ENABLE_HUSH_IF || ENABLE_HUSH_LOOPS |
"Vladimir N. Oleynik" | 19c3701 | 2005-09-22 14:33:15 +0000 | [diff] [blame] | 2959 | static int reserved_word(o_string *dest, struct p_context *ctx) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2960 | { |
| 2961 | struct reserved_combo { |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 2962 | char literal[7]; |
| 2963 | unsigned char code; |
| 2964 | int flag; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2965 | }; |
| 2966 | /* Mostly a list of accepted follow-up reserved words. |
| 2967 | * FLAG_END means we are done with the sequence, and are ready |
| 2968 | * to turn the compound list into a command. |
| 2969 | * FLAG_START means the word must start a new compound list. |
| 2970 | */ |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 2971 | static const struct reserved_combo reserved_list[] = { |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2972 | #if ENABLE_HUSH_IF |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2973 | { "if", RES_IF, FLAG_THEN | FLAG_START }, |
| 2974 | { "then", RES_THEN, FLAG_ELIF | FLAG_ELSE | FLAG_FI }, |
| 2975 | { "elif", RES_ELIF, FLAG_THEN }, |
| 2976 | { "else", RES_ELSE, FLAG_FI }, |
| 2977 | { "fi", RES_FI, FLAG_END }, |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2978 | #endif |
| 2979 | #if ENABLE_HUSH_LOOPS |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2980 | { "for", RES_FOR, FLAG_IN | FLAG_START }, |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2981 | { "while", RES_WHILE, FLAG_DO | FLAG_START }, |
| 2982 | { "until", RES_UNTIL, FLAG_DO | FLAG_START }, |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 2983 | { "in", RES_IN, FLAG_DO }, |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2984 | { "do", RES_DO, FLAG_DONE }, |
| 2985 | { "done", RES_DONE, FLAG_END } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2986 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 2987 | }; |
Denis Vlasenko | 80b8b39 | 2007-06-25 10:55:35 +0000 | [diff] [blame] | 2988 | |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 2989 | const struct reserved_combo *r; |
Denis Vlasenko | c72c1ed | 2007-01-30 22:31:26 +0000 | [diff] [blame] | 2990 | |
Denis Vlasenko | 80b8b39 | 2007-06-25 10:55:35 +0000 | [diff] [blame] | 2991 | for (r = reserved_list; r < reserved_list + ARRAY_SIZE(reserved_list); r++) { |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 2992 | if (strcmp(dest->data, r->literal) != 0) |
| 2993 | continue; |
| 2994 | debug_printf("found reserved word %s, code %d\n", r->literal, r->code); |
| 2995 | if (r->flag & FLAG_START) { |
| 2996 | struct p_context *new; |
| 2997 | debug_printf("push stack\n"); |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 2998 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 2999 | if (ctx->res_w == RES_IN || ctx->res_w == RES_FOR) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3000 | syntax("malformed for"); /* example: 'for if' */ |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3001 | ctx->res_w = RES_SNTX; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3002 | b_reset(dest); |
Eric Andersen | af44a0e | 2001-04-27 07:26:12 +0000 | [diff] [blame] | 3003 | return 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3004 | } |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3005 | #endif |
| 3006 | new = xmalloc(sizeof(*new)); |
| 3007 | *new = *ctx; /* physical copy */ |
| 3008 | initialize_context(ctx); |
| 3009 | ctx->stack = new; |
| 3010 | } else if (ctx->res_w == RES_NONE || !(ctx->old_flag & (1 << r->code))) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3011 | syntax(NULL); |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3012 | ctx->res_w = RES_SNTX; |
Denis Vlasenko | ff131b9 | 2007-04-10 15:42:06 +0000 | [diff] [blame] | 3013 | b_reset(dest); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3014 | return 1; |
| 3015 | } |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3016 | ctx->res_w = r->code; |
| 3017 | ctx->old_flag = r->flag; |
| 3018 | if (ctx->old_flag & FLAG_END) { |
| 3019 | struct p_context *old; |
| 3020 | debug_printf("pop stack\n"); |
| 3021 | done_pipe(ctx, PIPE_SEQ); |
| 3022 | old = ctx->stack; |
| 3023 | old->child->group = ctx->list_head; |
| 3024 | old->child->subshell = 0; |
| 3025 | *ctx = *old; /* physical copy */ |
| 3026 | free(old); |
| 3027 | } |
| 3028 | b_reset(dest); |
| 3029 | return 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3030 | } |
| 3031 | return 0; |
| 3032 | } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 3033 | #else |
| 3034 | #define reserved_word(dest, ctx) ((int)0) |
| 3035 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3036 | |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3037 | /* Normal return is 0. |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3038 | * Syntax or xglob errors return 1. */ |
| 3039 | static int done_word(o_string *dest, struct p_context *ctx) |
| 3040 | { |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3041 | struct child_prog *child = ctx->child; |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 3042 | char ***glob_target; |
| 3043 | int gr; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3044 | |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3045 | debug_printf_parse("done_word entered: '%s' %p\n", dest->data, child); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3046 | if (dest->length == 0 && !dest->nonnull) { |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3047 | debug_printf_parse("done_word return 0: true null, ignored\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3048 | return 0; |
| 3049 | } |
| 3050 | if (ctx->pending_redirect) { |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3051 | glob_target = &ctx->pending_redirect->glob_word; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3052 | } else { |
| 3053 | if (child->group) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3054 | syntax(NULL); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3055 | debug_printf_parse("done_word return 1: syntax error, groups and arglists don't mix\n"); |
| 3056 | return 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3057 | } |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 3058 | if (!child->argv && (ctx->parse_type & PARSEFLAG_SEMICOLON)) { |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3059 | debug_printf_parse(": checking '%s' for reserved-ness\n", dest->data); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3060 | if (reserved_word(dest, ctx)) { |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3061 | debug_printf_parse("done_word return %d\n", (ctx->res_w == RES_SNTX)); |
| 3062 | return (ctx->res_w == RES_SNTX); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3063 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3064 | } |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 3065 | glob_target = &child->argv; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3066 | } |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 3067 | gr = xglob(dest, glob_target); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3068 | if (gr != 0) { |
| 3069 | debug_printf_parse("done_word return 1: xglob returned %d\n", gr); |
| 3070 | return 1; |
| 3071 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3072 | |
| 3073 | b_reset(dest); |
| 3074 | if (ctx->pending_redirect) { |
Denis Vlasenko | f962a03 | 2007-11-23 12:50:54 +0000 | [diff] [blame] | 3075 | /* NB: don't free_strings(ctx->pending_redirect->glob_word) here */ |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 3076 | if (ctx->pending_redirect->glob_word |
| 3077 | && ctx->pending_redirect->glob_word[0] |
| 3078 | && ctx->pending_redirect->glob_word[1] |
| 3079 | ) { |
| 3080 | /* more than one word resulted from globbing redir */ |
| 3081 | ctx->pending_redirect = NULL; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 3082 | bb_error_msg("ambiguous redirect"); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3083 | debug_printf_parse("done_word return 1: ambiguous redirect\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3084 | return 1; |
| 3085 | } |
Denis Vlasenko | d65ea39 | 2007-10-01 10:02:25 +0000 | [diff] [blame] | 3086 | ctx->pending_redirect = NULL; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3087 | } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 3088 | #if ENABLE_HUSH_LOOPS |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3089 | if (ctx->res_w == RES_FOR) { |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3090 | done_word(dest, ctx); |
| 3091 | done_pipe(ctx, PIPE_SEQ); |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3092 | } |
Denis Vlasenko | 0681033 | 2007-05-21 23:30:54 +0000 | [diff] [blame] | 3093 | #endif |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3094 | debug_printf_parse("done_word return 0\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3095 | return 0; |
| 3096 | } |
| 3097 | |
| 3098 | /* The only possible error here is out of memory, in which case |
| 3099 | * xmalloc exits. */ |
| 3100 | static int done_command(struct p_context *ctx) |
| 3101 | { |
| 3102 | /* The child is really already in the pipe structure, so |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3103 | * advance the pipe counter and make a new, null child. */ |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3104 | struct pipe *pi = ctx->pipe; |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3105 | struct child_prog *child = ctx->child; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3106 | |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3107 | if (child) { |
| 3108 | if (child->group == NULL |
| 3109 | && child->argv == NULL |
| 3110 | && child->redirects == NULL |
| 3111 | ) { |
Denis Vlasenko | dd4cb2b | 2007-05-05 15:11:40 +0000 | [diff] [blame] | 3112 | debug_printf_parse("done_command: skipping null cmd, num_progs=%d\n", pi->num_progs); |
| 3113 | return pi->num_progs; |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3114 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3115 | pi->num_progs++; |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3116 | debug_printf_parse("done_command: ++num_progs=%d\n", pi->num_progs); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3117 | } else { |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3118 | debug_printf_parse("done_command: initializing, num_progs=%d\n", pi->num_progs); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3119 | } |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3120 | |
| 3121 | /* Only real trickiness here is that the uncommitted |
| 3122 | * child structure is not counted in pi->num_progs. */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3123 | pi->progs = xrealloc(pi->progs, sizeof(*pi->progs) * (pi->num_progs+1)); |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3124 | child = &pi->progs[pi->num_progs]; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3125 | |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3126 | memset(child, 0, sizeof(*child)); |
| 3127 | /*child->redirects = NULL;*/ |
| 3128 | /*child->argv = NULL;*/ |
| 3129 | /*child->is_stopped = 0;*/ |
| 3130 | /*child->group = NULL;*/ |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3131 | child->family = pi; |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 3132 | //sp: /*child->sp = 0;*/ |
Denis Vlasenko | 262d765 | 2007-05-20 21:52:49 +0000 | [diff] [blame] | 3133 | //pt: child->parse_type = ctx->parse_type; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3134 | |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3135 | ctx->child = child; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3136 | /* but ctx->pipe and ctx->list_head remain unchanged */ |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3137 | |
Denis Vlasenko | dd4cb2b | 2007-05-05 15:11:40 +0000 | [diff] [blame] | 3138 | return pi->num_progs; /* used only for 0/nonzero check */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3139 | } |
| 3140 | |
| 3141 | static int done_pipe(struct p_context *ctx, pipe_style type) |
| 3142 | { |
| 3143 | struct pipe *new_p; |
Denis Vlasenko | dd4cb2b | 2007-05-05 15:11:40 +0000 | [diff] [blame] | 3144 | int not_null; |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3145 | |
| 3146 | debug_printf_parse("done_pipe entered, followup %d\n", type); |
Denis Vlasenko | dd4cb2b | 2007-05-05 15:11:40 +0000 | [diff] [blame] | 3147 | not_null = done_command(ctx); /* implicit closure of previous command */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3148 | ctx->pipe->followup = type; |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 3149 | ctx->pipe->res_word = ctx->res_w; |
Denis Vlasenko | dd4cb2b | 2007-05-05 15:11:40 +0000 | [diff] [blame] | 3150 | /* Without this check, even just <enter> on command line generates |
| 3151 | * tree of three NOPs (!). Which is harmless but annoying. |
| 3152 | * IOW: it is safe to do it unconditionally. */ |
| 3153 | if (not_null) { |
| 3154 | new_p = new_pipe(); |
| 3155 | ctx->pipe->next = new_p; |
| 3156 | ctx->pipe = new_p; |
| 3157 | ctx->child = NULL; |
| 3158 | done_command(ctx); /* set up new pipe to accept commands */ |
| 3159 | } |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3160 | debug_printf_parse("done_pipe return 0\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3161 | return 0; |
| 3162 | } |
| 3163 | |
| 3164 | /* peek ahead in the in_str to find out if we have a "&n" construct, |
| 3165 | * as in "2>&1", that represents duplicating a file descriptor. |
| 3166 | * returns either -2 (syntax error), -1 (no &), or the number found. |
| 3167 | */ |
| 3168 | static int redirect_dup_num(struct in_str *input) |
| 3169 | { |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3170 | int ch, d = 0, ok = 0; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3171 | ch = b_peek(input); |
| 3172 | if (ch != '&') return -1; |
| 3173 | |
| 3174 | b_getch(input); /* get the & */ |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3175 | ch = b_peek(input); |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 3176 | if (ch == '-') { |
| 3177 | b_getch(input); |
| 3178 | return -3; /* "-" represents "close me" */ |
| 3179 | } |
| 3180 | while (isdigit(ch)) { |
Denis Vlasenko | 7d4c44e | 2007-04-16 22:34:39 +0000 | [diff] [blame] | 3181 | d = d*10 + (ch-'0'); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3182 | ok = 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3183 | b_getch(input); |
Eric Andersen | 83a2ae2 | 2001-05-07 17:59:25 +0000 | [diff] [blame] | 3184 | ch = b_peek(input); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3185 | } |
| 3186 | if (ok) return d; |
| 3187 | |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 3188 | bb_error_msg("ambiguous redirect"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3189 | return -2; |
| 3190 | } |
| 3191 | |
| 3192 | /* If a redirect is immediately preceded by a number, that number is |
| 3193 | * supposed to tell which file descriptor to redirect. This routine |
| 3194 | * looks for such preceding numbers. In an ideal world this routine |
| 3195 | * needs to handle all the following classes of redirects... |
| 3196 | * echo 2>foo # redirects fd 2 to file "foo", nothing passed to echo |
| 3197 | * echo 49>foo # redirects fd 49 to file "foo", nothing passed to echo |
| 3198 | * echo -2>foo # redirects fd 1 to file "foo", "-2" passed to echo |
| 3199 | * echo 49x>foo # redirects fd 1 to file "foo", "49x" passed to echo |
| 3200 | * A -1 output from this program means no valid number was found, so the |
| 3201 | * caller should use the appropriate default for this redirection. |
| 3202 | */ |
| 3203 | static int redirect_opt_num(o_string *o) |
| 3204 | { |
| 3205 | int num; |
| 3206 | |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3207 | if (o->length == 0) |
| 3208 | return -1; |
| 3209 | for (num = 0; num < o->length; num++) { |
| 3210 | if (!isdigit(*(o->data + num))) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3211 | return -1; |
| 3212 | } |
| 3213 | } |
| 3214 | /* reuse num (and save an int) */ |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3215 | num = atoi(o->data); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3216 | b_reset(o); |
| 3217 | return num; |
| 3218 | } |
| 3219 | |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3220 | #if ENABLE_HUSH_TICK |
Denis Vlasenko | 8412d79 | 2007-10-01 09:59:47 +0000 | [diff] [blame] | 3221 | /* NB: currently disabled on NOMMU */ |
"Vladimir N. Oleynik" | 19c3701 | 2005-09-22 14:33:15 +0000 | [diff] [blame] | 3222 | static FILE *generate_stream_from_list(struct pipe *head) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3223 | { |
| 3224 | FILE *pf; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3225 | int pid, channel[2]; |
Denis Vlasenko | ba7cf26 | 2007-05-25 14:34:30 +0000 | [diff] [blame] | 3226 | |
Denis Vlasenko | 5a6aedd | 2007-05-26 16:44:20 +0000 | [diff] [blame] | 3227 | xpipe(channel); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3228 | /* *** NOMMU WARNING *** */ |
| 3229 | /* By using vfork here, we suspend parent till child exits or execs. |
| 3230 | * If child will not do it before it fills the pipe, it can block forever |
| 3231 | * in write(STDOUT_FILENO), and parent (shell) will be also stuck. |
| 3232 | */ |
| 3233 | pid = BB_MMU ? fork() : vfork(); |
| 3234 | if (pid < 0) |
| 3235 | bb_perror_msg_and_die(BB_MMU ? "fork" : "vfork"); |
| 3236 | if (pid == 0) { /* child */ |
Denis Vlasenko | 8317799 | 2008-02-11 08:44:36 +0000 | [diff] [blame] | 3237 | if (ENABLE_HUSH_JOB) |
| 3238 | die_sleep = 0; /* let nofork's xfuncs die */ |
Denis Vlasenko | 284d0fa | 2008-02-16 13:18:17 +0000 | [diff] [blame] | 3239 | close(channel[0]); /* NB: close _first_, then move fd! */ |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3240 | xmove_fd(channel[1], 1); |
Denis Vlasenko | ba7cf26 | 2007-05-25 14:34:30 +0000 | [diff] [blame] | 3241 | /* Prevent it from trying to handle ctrl-z etc */ |
Denis Vlasenko | 27f79ff | 2007-05-30 00:55:52 +0000 | [diff] [blame] | 3242 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | ba7cf26 | 2007-05-25 14:34:30 +0000 | [diff] [blame] | 3243 | run_list_level = 1; |
Denis Vlasenko | 27f79ff | 2007-05-30 00:55:52 +0000 | [diff] [blame] | 3244 | #endif |
Denis Vlasenko | ba7cf26 | 2007-05-25 14:34:30 +0000 | [diff] [blame] | 3245 | /* Process substitution is not considered to be usual |
| 3246 | * 'command execution'. |
| 3247 | * SUSv3 says ctrl-Z should be ignored, ctrl-C should not. */ |
| 3248 | /* Not needed, we are relying on it being disabled |
| 3249 | * everywhere outside actual command execution. */ |
| 3250 | /*set_jobctrl_sighandler(SIG_IGN);*/ |
| 3251 | set_misc_sighandler(SIG_DFL); |
Denis Vlasenko | c04163a | 2008-02-11 08:30:53 +0000 | [diff] [blame] | 3252 | /* Freeing 'head' here would break NOMMU. */ |
| 3253 | _exit(run_list(head)); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3254 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3255 | close(channel[1]); |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 3256 | pf = fdopen(channel[0], "r"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3257 | return pf; |
Denis Vlasenko | c04163a | 2008-02-11 08:30:53 +0000 | [diff] [blame] | 3258 | /* 'head' is freed by the caller */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3259 | } |
| 3260 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 3261 | /* Return code is exit status of the process that is run. */ |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 3262 | static int process_command_subs(o_string *dest, |
| 3263 | /*struct p_context *ctx,*/ |
| 3264 | struct in_str *input, |
| 3265 | const char *subst_end) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3266 | { |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 3267 | int retcode, ch, eol_cnt; |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3268 | o_string result = NULL_O_STRING; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3269 | struct p_context inner; |
| 3270 | FILE *p; |
| 3271 | struct in_str pipe_str; |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 3272 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3273 | initialize_context(&inner); |
| 3274 | |
| 3275 | /* recursion to generate command */ |
| 3276 | retcode = parse_stream(&result, &inner, input, subst_end); |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3277 | if (retcode != 0) |
| 3278 | return retcode; /* syntax error or EOF */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3279 | done_word(&result, &inner); |
| 3280 | done_pipe(&inner, PIPE_SEQ); |
| 3281 | b_free(&result); |
| 3282 | |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3283 | p = generate_stream_from_list(inner.list_head); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3284 | if (p == NULL) |
| 3285 | return 1; |
Denis Vlasenko | a089817 | 2007-10-01 09:59:01 +0000 | [diff] [blame] | 3286 | close_on_exec_on(fileno(p)); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3287 | setup_file_in_str(&pipe_str, p); |
| 3288 | |
| 3289 | /* now send results of command back into original context */ |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 3290 | eol_cnt = 0; |
| 3291 | while ((ch = b_getch(&pipe_str)) != EOF) { |
| 3292 | if (ch == '\n') { |
| 3293 | eol_cnt++; |
| 3294 | continue; |
| 3295 | } |
| 3296 | while (eol_cnt) { |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3297 | b_addqchr(dest, '\n', dest->o_quote); |
Denis Vlasenko | 3e9aaae | 2007-05-11 12:56:43 +0000 | [diff] [blame] | 3298 | eol_cnt--; |
| 3299 | } |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3300 | b_addqchr(dest, ch, dest->o_quote); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3301 | } |
| 3302 | |
| 3303 | debug_printf("done reading from pipe, pclose()ing\n"); |
| 3304 | /* This is the step that wait()s for the child. Should be pretty |
| 3305 | * safe, since we just read an EOF from its stdout. We could try |
Denis Vlasenko | 262d765 | 2007-05-20 21:52:49 +0000 | [diff] [blame] | 3306 | * to do better, by using wait(), and keeping track of background jobs |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3307 | * at the same time. That would be a lot of work, and contrary |
| 3308 | * to the KISS philosophy of this program. */ |
Denis Vlasenko | ba7cf26 | 2007-05-25 14:34:30 +0000 | [diff] [blame] | 3309 | retcode = fclose(p); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3310 | free_pipe_list(inner.list_head, /* indent: */ 0); |
Denis Vlasenko | ba7cf26 | 2007-05-25 14:34:30 +0000 | [diff] [blame] | 3311 | debug_printf("closed FILE from child, retcode=%d\n", retcode); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3312 | return retcode; |
| 3313 | } |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3314 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3315 | |
| 3316 | static int parse_group(o_string *dest, struct p_context *ctx, |
| 3317 | struct in_str *input, int ch) |
| 3318 | { |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3319 | int rcode; |
| 3320 | const char *endch = NULL; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3321 | struct p_context sub; |
| 3322 | struct child_prog *child = ctx->child; |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3323 | |
| 3324 | debug_printf_parse("parse_group entered\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3325 | if (child->argv) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3326 | syntax(NULL); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3327 | debug_printf_parse("parse_group return 1: syntax error, groups and arglists don't mix\n"); |
| 3328 | return 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3329 | } |
| 3330 | initialize_context(&sub); |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3331 | endch = "}"; |
| 3332 | if (ch == '(') { |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3333 | endch = ")"; |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3334 | child->subshell = 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3335 | } |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3336 | rcode = parse_stream(dest, &sub, input, endch); |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 3337 | //vda: err chk? |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3338 | done_word(dest, &sub); /* finish off the final word in the subcontext */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3339 | done_pipe(&sub, PIPE_SEQ); /* and the final command there, too */ |
| 3340 | child->group = sub.list_head; |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3341 | |
| 3342 | debug_printf_parse("parse_group return %d\n", rcode); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3343 | return rcode; |
| 3344 | /* child remains "open", available for possible redirects */ |
| 3345 | } |
| 3346 | |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 3347 | /* Basically useful version until someone wants to get fancier, |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3348 | * see the bash man page under "Parameter Expansion" */ |
Denis Vlasenko | 15d78fb | 2007-01-30 22:28:21 +0000 | [diff] [blame] | 3349 | static const char *lookup_param(const char *src) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3350 | { |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3351 | struct variable *var = get_local_var(src); |
| 3352 | if (var) |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 3353 | return strchr(var->varstr, '=') + 1; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3354 | return NULL; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3355 | } |
| 3356 | |
| 3357 | /* return code: 0 for OK, 1 for syntax error */ |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 3358 | static int handle_dollar(o_string *dest, /*struct p_context *ctx,*/ struct in_str *input) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3359 | { |
Denis Vlasenko | 602d13c | 2007-05-13 18:34:53 +0000 | [diff] [blame] | 3360 | int ch = b_peek(input); /* first character after the $ */ |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3361 | unsigned char quote_mask = dest->o_quote ? 0x80 : 0; |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 3362 | |
| 3363 | debug_printf_parse("handle_dollar entered: ch='%c'\n", ch); |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 3364 | if (isalpha(ch)) { |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3365 | b_addchr(dest, SPECIAL_VAR_SYMBOL); |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 3366 | //sp: ctx->child->sp++; |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 3367 | while (1) { |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 3368 | debug_printf_parse(": '%c'\n", ch); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3369 | b_getch(input); |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 3370 | b_addchr(dest, ch | quote_mask); |
| 3371 | quote_mask = 0; |
Denis Vlasenko | 602d13c | 2007-05-13 18:34:53 +0000 | [diff] [blame] | 3372 | ch = b_peek(input); |
| 3373 | if (!isalnum(ch) && ch != '_') |
| 3374 | break; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3375 | } |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3376 | b_addchr(dest, SPECIAL_VAR_SYMBOL); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3377 | } else if (isdigit(ch)) { |
Denis Vlasenko | 602d13c | 2007-05-13 18:34:53 +0000 | [diff] [blame] | 3378 | make_one_char_var: |
| 3379 | b_addchr(dest, SPECIAL_VAR_SYMBOL); |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 3380 | //sp: ctx->child->sp++; |
Denis Vlasenko | 602d13c | 2007-05-13 18:34:53 +0000 | [diff] [blame] | 3381 | debug_printf_parse(": '%c'\n", ch); |
| 3382 | b_getch(input); |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 3383 | b_addchr(dest, ch | quote_mask); |
Denis Vlasenko | 602d13c | 2007-05-13 18:34:53 +0000 | [diff] [blame] | 3384 | b_addchr(dest, SPECIAL_VAR_SYMBOL); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3385 | } else switch (ch) { |
Denis Vlasenko | 602d13c | 2007-05-13 18:34:53 +0000 | [diff] [blame] | 3386 | case '$': /* pid */ |
| 3387 | case '!': /* last bg pid */ |
| 3388 | case '?': /* last exit code */ |
| 3389 | case '#': /* number of args */ |
| 3390 | case '*': /* args */ |
| 3391 | case '@': /* args */ |
| 3392 | goto make_one_char_var; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3393 | case '{': |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3394 | b_addchr(dest, SPECIAL_VAR_SYMBOL); |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 3395 | //sp: ctx->child->sp++; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3396 | b_getch(input); |
| 3397 | /* XXX maybe someone will try to escape the '}' */ |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3398 | while (1) { |
| 3399 | ch = b_getch(input); |
Denis Vlasenko | b055001 | 2007-05-24 12:18:16 +0000 | [diff] [blame] | 3400 | if (ch == '}') |
| 3401 | break; |
| 3402 | if (!isalnum(ch) && ch != '_') { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3403 | syntax("unterminated ${name}"); |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 3404 | debug_printf_parse("handle_dollar return 1: unterminated ${name}\n"); |
| 3405 | return 1; |
| 3406 | } |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 3407 | debug_printf_parse(": '%c'\n", ch); |
Denis Vlasenko | 1f4cf51 | 2007-05-16 10:39:24 +0000 | [diff] [blame] | 3408 | b_addchr(dest, ch | quote_mask); |
| 3409 | quote_mask = 0; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3410 | } |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3411 | b_addchr(dest, SPECIAL_VAR_SYMBOL); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3412 | break; |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3413 | #if ENABLE_HUSH_TICK |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3414 | case '(': |
Matt Kraai | 9f8caf1 | 2001-05-02 16:26:12 +0000 | [diff] [blame] | 3415 | b_getch(input); |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 3416 | process_command_subs(dest, /*ctx,*/ input, ")"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3417 | break; |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3418 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3419 | case '-': |
| 3420 | case '_': |
| 3421 | /* still unhandled, but should be eventually */ |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3422 | bb_error_msg("unhandled syntax: $%c", ch); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3423 | return 1; |
| 3424 | break; |
| 3425 | default: |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3426 | b_addqchr(dest, '$', dest->o_quote); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3427 | } |
Denis Vlasenko | e0a3367 | 2007-05-10 23:06:55 +0000 | [diff] [blame] | 3428 | debug_printf_parse("handle_dollar return 0\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3429 | return 0; |
| 3430 | } |
| 3431 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3432 | /* return code is 0 for normal exit, 1 for syntax error */ |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 3433 | static int parse_stream(o_string *dest, struct p_context *ctx, |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3434 | struct in_str *input, const char *end_trigger) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3435 | { |
"Vladimir N. Oleynik" | 4ccd2b4 | 2006-01-31 09:27:48 +0000 | [diff] [blame] | 3436 | int ch, m; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3437 | int redir_fd; |
| 3438 | redir_type redir_style; |
| 3439 | int next; |
| 3440 | |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3441 | /* Only double-quote state is handled in the state variable dest->o_quote. |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3442 | * A single-quote triggers a bypass of the main loop until its mate is |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3443 | * found. When recursing, quote state is passed in via dest->o_quote. */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3444 | |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3445 | debug_printf_parse("parse_stream entered, end_trigger='%s'\n", end_trigger); |
| 3446 | |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3447 | while (1) { |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3448 | m = CHAR_IFS; |
| 3449 | next = '\0'; |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3450 | ch = b_getch(input); |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3451 | if (ch != EOF) { |
| 3452 | m = charmap[ch]; |
| 3453 | if (ch != '\n') |
| 3454 | next = b_peek(input); |
| 3455 | } |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3456 | debug_printf_parse(": ch=%c (%d) m=%d quote=%d\n", |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3457 | ch, ch, m, dest->o_quote); |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3458 | if (m == CHAR_ORDINARY |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3459 | || (m != CHAR_SPECIAL && dest->o_quote) |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3460 | ) { |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3461 | if (ch == EOF) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3462 | syntax("unterminated \""); |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3463 | debug_printf_parse("parse_stream return 1: unterminated \"\n"); |
| 3464 | return 1; |
| 3465 | } |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3466 | b_addqchr(dest, ch, dest->o_quote); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3467 | continue; |
| 3468 | } |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3469 | if (m == CHAR_IFS) { |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3470 | if (done_word(dest, ctx)) { |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3471 | debug_printf_parse("parse_stream return 1: done_word!=0\n"); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3472 | return 1; |
Eric Andersen | aac75e5 | 2001-04-30 18:18:45 +0000 | [diff] [blame] | 3473 | } |
Denis Vlasenko | 1a73586 | 2007-05-23 00:32:25 +0000 | [diff] [blame] | 3474 | if (ch == EOF) |
| 3475 | break; |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3476 | /* If we aren't performing a substitution, treat |
| 3477 | * a newline as a command separator. |
| 3478 | * [why we don't handle it exactly like ';'? --vda] */ |
| 3479 | if (end_trigger && ch == '\n') { |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3480 | done_pipe(ctx, PIPE_SEQ); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3481 | } |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3482 | } |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3483 | if ((end_trigger && strchr(end_trigger, ch)) |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3484 | && !dest->o_quote && ctx->res_w == RES_NONE |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3485 | ) { |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3486 | debug_printf_parse("parse_stream return 0: end_trigger char found\n"); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3487 | return 0; |
| 3488 | } |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3489 | if (m == CHAR_IFS) |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3490 | continue; |
| 3491 | switch (ch) { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3492 | case '#': |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3493 | if (dest->length == 0 && !dest->o_quote) { |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 3494 | while (1) { |
| 3495 | ch = b_peek(input); |
| 3496 | if (ch == EOF || ch == '\n') |
| 3497 | break; |
| 3498 | b_getch(input); |
| 3499 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3500 | } else { |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3501 | b_addqchr(dest, ch, dest->o_quote); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3502 | } |
| 3503 | break; |
| 3504 | case '\\': |
| 3505 | if (next == EOF) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3506 | syntax("\\<eof>"); |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3507 | debug_printf_parse("parse_stream return 1: \\<eof>\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3508 | return 1; |
| 3509 | } |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3510 | b_addqchr(dest, '\\', dest->o_quote); |
| 3511 | b_addqchr(dest, b_getch(input), dest->o_quote); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3512 | break; |
| 3513 | case '$': |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 3514 | if (handle_dollar(dest, /*ctx,*/ input) != 0) { |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3515 | debug_printf_parse("parse_stream return 1: handle_dollar returned non-0\n"); |
| 3516 | return 1; |
| 3517 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3518 | break; |
| 3519 | case '\'': |
| 3520 | dest->nonnull = 1; |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 3521 | while (1) { |
| 3522 | ch = b_getch(input); |
| 3523 | if (ch == EOF || ch == '\'') |
| 3524 | break; |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3525 | b_addchr(dest, ch); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3526 | } |
Denis Vlasenko | 0c886c6 | 2007-01-30 22:30:09 +0000 | [diff] [blame] | 3527 | if (ch == EOF) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3528 | syntax("unterminated '"); |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3529 | debug_printf_parse("parse_stream return 1: unterminated '\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3530 | return 1; |
| 3531 | } |
| 3532 | break; |
| 3533 | case '"': |
| 3534 | dest->nonnull = 1; |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3535 | dest->o_quote ^= 1; /* invert */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3536 | break; |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3537 | #if ENABLE_HUSH_TICK |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3538 | case '`': |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame^] | 3539 | process_command_subs(dest, /*ctx,*/ input, "`"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3540 | break; |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3541 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3542 | case '>': |
| 3543 | redir_fd = redirect_opt_num(dest); |
| 3544 | done_word(dest, ctx); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3545 | redir_style = REDIRECT_OVERWRITE; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3546 | if (next == '>') { |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3547 | redir_style = REDIRECT_APPEND; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3548 | b_getch(input); |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3549 | } |
| 3550 | #if 0 |
| 3551 | else if (next == '(') { |
| 3552 | syntax(">(process) not supported"); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3553 | debug_printf_parse("parse_stream return 1: >(process) not supported\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3554 | return 1; |
| 3555 | } |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3556 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3557 | setup_redirect(ctx, redir_fd, redir_style, input); |
| 3558 | break; |
| 3559 | case '<': |
| 3560 | redir_fd = redirect_opt_num(dest); |
| 3561 | done_word(dest, ctx); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3562 | redir_style = REDIRECT_INPUT; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3563 | if (next == '<') { |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3564 | redir_style = REDIRECT_HEREIS; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3565 | b_getch(input); |
| 3566 | } else if (next == '>') { |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3567 | redir_style = REDIRECT_IO; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3568 | b_getch(input); |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3569 | } |
| 3570 | #if 0 |
| 3571 | else if (next == '(') { |
| 3572 | syntax("<(process) not supported"); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3573 | debug_printf_parse("parse_stream return 1: <(process) not supported\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3574 | return 1; |
| 3575 | } |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3576 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3577 | setup_redirect(ctx, redir_fd, redir_style, input); |
| 3578 | break; |
| 3579 | case ';': |
| 3580 | done_word(dest, ctx); |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3581 | done_pipe(ctx, PIPE_SEQ); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3582 | break; |
| 3583 | case '&': |
| 3584 | done_word(dest, ctx); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3585 | if (next == '&') { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3586 | b_getch(input); |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3587 | done_pipe(ctx, PIPE_AND); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3588 | } else { |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3589 | done_pipe(ctx, PIPE_BG); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3590 | } |
| 3591 | break; |
| 3592 | case '|': |
| 3593 | done_word(dest, ctx); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3594 | if (next == '|') { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3595 | b_getch(input); |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3596 | done_pipe(ctx, PIPE_OR); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3597 | } else { |
| 3598 | /* we could pick up a file descriptor choice here |
| 3599 | * with redirect_opt_num(), but bash doesn't do it. |
| 3600 | * "echo foo 2| cat" yields "foo 2". */ |
| 3601 | done_command(ctx); |
| 3602 | } |
| 3603 | break; |
| 3604 | case '(': |
| 3605 | case '{': |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3606 | if (parse_group(dest, ctx, input, ch) != 0) { |
| 3607 | debug_printf_parse("parse_stream return 1: parse_group returned non-0\n"); |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3608 | return 1; |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3609 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3610 | break; |
| 3611 | case ')': |
| 3612 | case '}': |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3613 | syntax("unexpected }"); /* Proper use of this character is caught by end_trigger */ |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3614 | debug_printf_parse("parse_stream return 1: unexpected '}'\n"); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3615 | return 1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3616 | default: |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3617 | if (ENABLE_HUSH_DEBUG) |
| 3618 | bb_error_msg_and_die("BUG: unexpected %c\n", ch); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3619 | } |
| 3620 | } |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3621 | /* Complain if quote? No, maybe we just finished a command substitution |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3622 | * that was quoted. Example: |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 3623 | * $ echo "`cat foo` plus more" |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3624 | * and we just got the EOF generated by the subshell that ran "cat foo" |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3625 | * The only real complaint is if we got an EOF when end_trigger != NULL, |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3626 | * that is, we were really supposed to get end_trigger, and never got |
| 3627 | * one before the EOF. Can't use the standard "syntax error" return code, |
| 3628 | * so that parse_stream_outer can distinguish the EOF and exit smoothly. */ |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3629 | debug_printf_parse("parse_stream return %d\n", -(end_trigger != NULL)); |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3630 | if (end_trigger) |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 3631 | return -1; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3632 | return 0; |
| 3633 | } |
| 3634 | |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3635 | static void set_in_charmap(const char *set, int code) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3636 | { |
Denis Vlasenko | f5294e1 | 2007-04-14 10:09:57 +0000 | [diff] [blame] | 3637 | while (*set) |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3638 | charmap[(unsigned char)*set++] = code; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3639 | } |
| 3640 | |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3641 | static void update_charmap(void) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3642 | { |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3643 | /* char *ifs and char charmap[256] are both globals. */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3644 | ifs = getenv("IFS"); |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3645 | if (ifs == NULL) |
| 3646 | ifs = " \t\n"; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3647 | /* Precompute a list of 'flow through' behavior so it can be treated |
| 3648 | * quickly up front. Computation is necessary because of IFS. |
| 3649 | * Special case handling of IFS == " \t\n" is not implemented. |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3650 | * The charmap[] array only really needs two bits each, |
| 3651 | * and on most machines that would be faster (reduced L1 cache use). |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3652 | */ |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3653 | memset(charmap, CHAR_ORDINARY, sizeof(charmap)); |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3654 | #if ENABLE_HUSH_TICK |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3655 | set_in_charmap("\\$\"`", CHAR_SPECIAL); |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3656 | #else |
| 3657 | set_in_charmap("\\$\"", CHAR_SPECIAL); |
| 3658 | #endif |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3659 | set_in_charmap("<>;&|(){}#'", CHAR_ORDINARY_IF_QUOTED); |
Denis Vlasenko | 14b5dd9 | 2007-05-20 21:51:38 +0000 | [diff] [blame] | 3660 | set_in_charmap(ifs, CHAR_IFS); /* are ordinary if quoted */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3661 | } |
| 3662 | |
Eric Andersen | aff114c | 2004-04-14 17:51:38 +0000 | [diff] [blame] | 3663 | /* most recursion does not come through here, the exception is |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3664 | * from builtin_source() and builtin_eval() */ |
| 3665 | static int parse_and_run_stream(struct in_str *inp, int parse_flag) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3666 | { |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3667 | struct p_context ctx; |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3668 | o_string temp = NULL_O_STRING; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3669 | int rcode; |
| 3670 | do { |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3671 | ctx.parse_type = parse_flag; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3672 | initialize_context(&ctx); |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3673 | update_charmap(); |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 3674 | if (!(parse_flag & PARSEFLAG_SEMICOLON) || (parse_flag & PARSEFLAG_REPARSING)) |
Denis Vlasenko | 8f6bdb4 | 2007-05-16 09:36:55 +0000 | [diff] [blame] | 3675 | set_in_charmap(";$&|", CHAR_ORDINARY); |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3676 | #if ENABLE_HUSH_INTERACTIVE |
Denis Vlasenko | 5a1437d | 2007-05-24 13:22:47 +0000 | [diff] [blame] | 3677 | inp->promptmode = 0; /* PS1 */ |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3678 | #endif |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3679 | /* We will stop & execute after each ';' or '\n'. |
| 3680 | * Example: "sleep 9999; echo TEST" + ctrl-C: |
| 3681 | * TEST should be printed */ |
Denis Vlasenko | e725bfe | 2007-05-03 22:45:39 +0000 | [diff] [blame] | 3682 | rcode = parse_stream(&temp, &ctx, inp, ";\n"); |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3683 | if (rcode != 1 && ctx.old_flag != 0) { |
Denis Vlasenko | 90e485c | 2007-05-23 15:22:50 +0000 | [diff] [blame] | 3684 | syntax(NULL); |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3685 | } |
| 3686 | if (rcode != 1 && ctx.old_flag == 0) { |
| 3687 | done_word(&temp, &ctx); |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3688 | done_pipe(&ctx, PIPE_SEQ); |
Denis Vlasenko | 400c5b6 | 2007-05-04 13:07:27 +0000 | [diff] [blame] | 3689 | debug_print_tree(ctx.list_head, 0); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3690 | debug_printf_exec("parse_stream_outer: run_and_free_list\n"); |
| 3691 | run_and_free_list(ctx.list_head); |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3692 | } else { |
| 3693 | if (ctx.old_flag != 0) { |
| 3694 | free(ctx.stack); |
| 3695 | b_reset(&temp); |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 3696 | } |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3697 | temp.nonnull = 0; |
Denis Vlasenko | ff09762 | 2007-10-01 10:00:45 +0000 | [diff] [blame] | 3698 | temp.o_quote = 0; |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3699 | inp->p = NULL; |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3700 | free_pipe_list(ctx.list_head, /* indent: */ 0); |
Eric Andersen | 4c9b68f | 2002-04-13 12:33:41 +0000 | [diff] [blame] | 3701 | } |
Eric Andersen | a813afc | 2001-05-24 16:19:36 +0000 | [diff] [blame] | 3702 | b_free(&temp); |
Denis Vlasenko | 219e88d | 2007-05-21 10:18:23 +0000 | [diff] [blame] | 3703 | } while (rcode != -1 && !(parse_flag & PARSEFLAG_EXIT_FROM_LOOP)); /* loop on syntax errors, return on EOF */ |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3704 | return 0; |
| 3705 | } |
| 3706 | |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3707 | static int parse_and_run_string(const char *s, int parse_flag) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3708 | { |
| 3709 | struct in_str input; |
| 3710 | setup_string_in_str(&input, s); |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3711 | return parse_and_run_stream(&input, parse_flag); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3712 | } |
| 3713 | |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3714 | static int parse_and_run_file(FILE *f) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3715 | { |
| 3716 | int rcode; |
| 3717 | struct in_str input; |
| 3718 | setup_file_in_str(&input, f); |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3719 | rcode = parse_and_run_stream(&input, PARSEFLAG_SEMICOLON); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3720 | return rcode; |
| 3721 | } |
| 3722 | |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3723 | #if ENABLE_HUSH_JOB |
Eric Andersen | 6c947d2 | 2001-06-25 22:24:38 +0000 | [diff] [blame] | 3724 | /* Make sure we have a controlling tty. If we get started under a job |
| 3725 | * aware app (like bash for example), make sure we are now in charge so |
| 3726 | * we don't fight over who gets the foreground */ |
Eric Andersen | eaecbf3 | 2001-10-31 10:41:31 +0000 | [diff] [blame] | 3727 | static void setup_job_control(void) |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 3728 | { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3729 | pid_t shell_pgrp; |
| 3730 | |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 3731 | saved_task_pgrp = shell_pgrp = getpgrp(); |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3732 | debug_printf_jobs("saved_task_pgrp=%d\n", saved_task_pgrp); |
Denis Vlasenko | 96e1b38 | 2007-09-30 23:50:48 +0000 | [diff] [blame] | 3733 | close_on_exec_on(interactive_fd); |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3734 | |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 3735 | /* If we were ran as 'hush &', |
| 3736 | * sleep until we are in the foreground. */ |
| 3737 | while (tcgetpgrp(interactive_fd) != shell_pgrp) { |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 3738 | /* Send TTIN to ourself (should stop us) */ |
Denis Vlasenko | ff131b9 | 2007-04-10 15:42:06 +0000 | [diff] [blame] | 3739 | kill(- shell_pgrp, SIGTTIN); |
Denis Vlasenko | a6a1785 | 2007-04-28 16:42:11 +0000 | [diff] [blame] | 3740 | shell_pgrp = getpgrp(); |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3741 | } |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 3742 | |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3743 | /* Ignore job-control and misc signals. */ |
| 3744 | set_jobctrl_sighandler(SIG_IGN); |
| 3745 | set_misc_sighandler(SIG_IGN); |
| 3746 | //huh? signal(SIGCHLD, SIG_IGN); |
| 3747 | |
Denis Vlasenko | a6c467f | 2007-05-05 15:10:52 +0000 | [diff] [blame] | 3748 | /* We _must_ restore tty pgrp on fatal signals */ |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3749 | set_fatal_sighandler(sigexit); |
Eric Andersen | 6c947d2 | 2001-06-25 22:24:38 +0000 | [diff] [blame] | 3750 | |
| 3751 | /* Put ourselves in our own process group. */ |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 3752 | setpgrp(); /* is the same as setpgid(our_pid, our_pid); */ |
Eric Andersen | 6c947d2 | 2001-06-25 22:24:38 +0000 | [diff] [blame] | 3753 | /* Grab control of the terminal. */ |
Denis Vlasenko | 3ac0e00 | 2007-04-28 16:45:22 +0000 | [diff] [blame] | 3754 | tcsetpgrp(interactive_fd, getpid()); |
Eric Andersen | 6c947d2 | 2001-06-25 22:24:38 +0000 | [diff] [blame] | 3755 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 3756 | #endif |
Eric Andersen | ada18ff | 2001-05-21 16:18:22 +0000 | [diff] [blame] | 3757 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 3758 | int hush_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Matt Kraai | 2d91deb | 2001-08-01 17:21:35 +0000 | [diff] [blame] | 3759 | int hush_main(int argc, char **argv) |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3760 | { |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 3761 | static const char version_str[] ALIGN1 = "HUSH_VERSION="HUSH_VER_STR; |
Denis Vlasenko | 0a83fc3 | 2007-05-25 11:12:32 +0000 | [diff] [blame] | 3762 | static const struct variable const_shell_ver = { |
| 3763 | .next = NULL, |
| 3764 | .varstr = (char*)version_str, |
| 3765 | .max_len = 1, /* 0 can provoke free(name) */ |
| 3766 | .flg_export = 1, |
| 3767 | .flg_read_only = 1, |
| 3768 | }; |
| 3769 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3770 | int opt; |
| 3771 | FILE *input; |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3772 | char **e; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3773 | struct variable *cur_var; |
Eric Andersen | bc604a2 | 2001-05-16 05:24:03 +0000 | [diff] [blame] | 3774 | |
Denis Vlasenko | 574f2f4 | 2008-02-27 18:41:59 +0000 | [diff] [blame] | 3775 | INIT_G(); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3776 | |
Denis Vlasenko | 0a83fc3 | 2007-05-25 11:12:32 +0000 | [diff] [blame] | 3777 | /* Deal with HUSH_VERSION */ |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 3778 | shell_ver = const_shell_ver; /* copying struct here */ |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3779 | top_var = &shell_ver; |
Denis Vlasenko | 0a83fc3 | 2007-05-25 11:12:32 +0000 | [diff] [blame] | 3780 | unsetenv("HUSH_VERSION"); /* in case it exists in initial env */ |
| 3781 | /* Initialize our shell local variables with the values |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3782 | * currently living in the environment */ |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3783 | cur_var = top_var; |
Denis Vlasenko | 0a83fc3 | 2007-05-25 11:12:32 +0000 | [diff] [blame] | 3784 | e = environ; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3785 | if (e) while (*e) { |
| 3786 | char *value = strchr(*e, '='); |
| 3787 | if (value) { /* paranoia */ |
| 3788 | cur_var->next = xzalloc(sizeof(*cur_var)); |
| 3789 | cur_var = cur_var->next; |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 3790 | cur_var->varstr = *e; |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3791 | cur_var->max_len = strlen(*e); |
| 3792 | cur_var->flg_export = 1; |
| 3793 | } |
| 3794 | e++; |
| 3795 | } |
Denis Vlasenko | 0a83fc3 | 2007-05-25 11:12:32 +0000 | [diff] [blame] | 3796 | putenv((char *)version_str); /* reinstate HUSH_VERSION */ |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 3797 | |
Denis Vlasenko | 38f6319 | 2007-01-22 09:03:07 +0000 | [diff] [blame] | 3798 | #if ENABLE_FEATURE_EDITING |
Denis Vlasenko | 8e1c715 | 2007-01-22 07:21:38 +0000 | [diff] [blame] | 3799 | line_input_state = new_line_input_t(FOR_SHELL); |
| 3800 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3801 | /* XXX what should these be while sourcing /etc/profile? */ |
| 3802 | global_argc = argc; |
| 3803 | global_argv = argv; |
Eric Andersen | 94ac244 | 2001-05-22 19:05:18 +0000 | [diff] [blame] | 3804 | /* Initialize some more globals to non-zero values */ |
| 3805 | set_cwd(); |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3806 | #if ENABLE_HUSH_INTERACTIVE |
| 3807 | #if ENABLE_FEATURE_EDITING |
| 3808 | cmdedit_set_initial_prompt(); |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3809 | #endif |
Eric Andersen | 94ac244 | 2001-05-22 19:05:18 +0000 | [diff] [blame] | 3810 | PS2 = "> "; |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3811 | #endif |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 3812 | |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3813 | if (EXIT_SUCCESS) /* otherwise is already done */ |
| 3814 | last_return_code = EXIT_SUCCESS; |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3815 | |
| 3816 | if (argv[0] && argv[0][0] == '-') { |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 3817 | debug_printf("sourcing /etc/profile\n"); |
Denis Vlasenko | f03dbed | 2007-04-13 19:55:50 +0000 | [diff] [blame] | 3818 | input = fopen("/etc/profile", "r"); |
| 3819 | if (input != NULL) { |
Denis Vlasenko | a089817 | 2007-10-01 09:59:01 +0000 | [diff] [blame] | 3820 | close_on_exec_on(fileno(input)); |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3821 | parse_and_run_file(input); |
Eric Andersen | a90f20b | 2001-06-26 23:00:21 +0000 | [diff] [blame] | 3822 | fclose(input); |
| 3823 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3824 | } |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3825 | input = stdin; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 3826 | |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3827 | while ((opt = getopt(argc, argv, "c:xif")) > 0) { |
| 3828 | switch (opt) { |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3829 | case 'c': |
Denis Vlasenko | 5f786c2 | 2007-04-20 08:35:45 +0000 | [diff] [blame] | 3830 | global_argv = argv + optind; |
| 3831 | global_argc = argc - optind; |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3832 | opt = parse_and_run_string(optarg, PARSEFLAG_SEMICOLON); |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3833 | goto final_return; |
| 3834 | case 'i': |
Denis Vlasenko | c666f71 | 2007-05-16 22:18:54 +0000 | [diff] [blame] | 3835 | /* Well, we cannot just declare interactiveness, |
| 3836 | * we have to have some stuff (ctty, etc) */ |
| 3837 | /* interactive_fd++; */ |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3838 | break; |
| 3839 | case 'f': |
Denis Vlasenko | c8be5ee | 2007-05-17 15:38:46 +0000 | [diff] [blame] | 3840 | fake_mode = 1; |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3841 | break; |
| 3842 | default: |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 3843 | #ifndef BB_VER |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3844 | fprintf(stderr, "Usage: sh [FILE]...\n" |
| 3845 | " or: sh -c command [args]...\n\n"); |
| 3846 | exit(EXIT_FAILURE); |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 3847 | #else |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3848 | bb_show_usage(); |
Eric Andersen | 9ffb7dd | 2001-05-19 03:00:46 +0000 | [diff] [blame] | 3849 | #endif |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3850 | } |
| 3851 | } |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3852 | #if ENABLE_HUSH_JOB |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3853 | /* A shell is interactive if the '-i' flag was given, or if all of |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3854 | * the following conditions are met: |
Denis Vlasenko | 55b2de7 | 2007-04-18 17:21:28 +0000 | [diff] [blame] | 3855 | * no -c command |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3856 | * no arguments remaining or the -s flag given |
| 3857 | * standard input is a terminal |
| 3858 | * standard output is a terminal |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3859 | * Refer to Posix.2, the description of the 'sh' utility. */ |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3860 | if (argv[optind] == NULL && input == stdin |
| 3861 | && isatty(STDIN_FILENO) && isatty(STDOUT_FILENO) |
| 3862 | ) { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3863 | saved_tty_pgrp = tcgetpgrp(STDIN_FILENO); |
| 3864 | debug_printf("saved_tty_pgrp=%d\n", saved_tty_pgrp); |
| 3865 | if (saved_tty_pgrp >= 0) { |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3866 | /* try to dup to high fd#, >= 255 */ |
| 3867 | interactive_fd = fcntl(STDIN_FILENO, F_DUPFD, 255); |
| 3868 | if (interactive_fd < 0) { |
| 3869 | /* try to dup to any fd */ |
| 3870 | interactive_fd = dup(STDIN_FILENO); |
| 3871 | if (interactive_fd < 0) |
| 3872 | /* give up */ |
| 3873 | interactive_fd = 0; |
| 3874 | } |
Denis Vlasenko | 2f1bb36 | 2007-04-21 10:01:14 +0000 | [diff] [blame] | 3875 | // TODO: track & disallow any attempts of user |
| 3876 | // to (inadvertently) close/redirect it |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3877 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3878 | } |
Denis Vlasenko | 21f0d4c | 2007-05-06 14:15:42 +0000 | [diff] [blame] | 3879 | debug_printf("interactive_fd=%d\n", interactive_fd); |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3880 | if (interactive_fd) { |
Denis Vlasenko | 08126f6 | 2008-02-11 08:39:11 +0000 | [diff] [blame] | 3881 | fcntl(interactive_fd, F_SETFD, FD_CLOEXEC); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3882 | /* Looks like they want an interactive shell */ |
Eric Andersen | 52a97ca | 2001-06-22 06:49:26 +0000 | [diff] [blame] | 3883 | setup_job_control(); |
Denis Vlasenko | 4ecfcdc | 2008-02-11 08:32:31 +0000 | [diff] [blame] | 3884 | /* -1 is special - makes xfuncs longjmp, not exit |
Denis Vlasenko | c04163a | 2008-02-11 08:30:53 +0000 | [diff] [blame] | 3885 | * (we reset die_sleep = 0 whereever we [v]fork) */ |
| 3886 | die_sleep = -1; |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3887 | if (setjmp(die_jmp)) { |
| 3888 | /* xfunc has failed! die die die */ |
| 3889 | hush_exit(xfunc_error_retval); |
| 3890 | } |
Denis Vlasenko | 2f1bb36 | 2007-04-21 10:01:14 +0000 | [diff] [blame] | 3891 | #if !ENABLE_FEATURE_SH_EXTRA_QUIET |
Denis Vlasenko | ca525b4 | 2007-06-13 12:27:17 +0000 | [diff] [blame] | 3892 | printf("\n\n%s hush - the humble shell v"HUSH_VER_STR"\n", bb_banner); |
Denis Vlasenko | 2f1bb36 | 2007-04-21 10:01:14 +0000 | [diff] [blame] | 3893 | printf("Enter 'help' for a list of built-in commands.\n\n"); |
| 3894 | #endif |
Eric Andersen | ada18ff | 2001-05-21 16:18:22 +0000 | [diff] [blame] | 3895 | } |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3896 | #elif ENABLE_HUSH_INTERACTIVE |
| 3897 | /* no job control compiled, only prompt/line editing */ |
| 3898 | if (argv[optind] == NULL && input == stdin |
| 3899 | && isatty(STDIN_FILENO) && isatty(STDOUT_FILENO) |
| 3900 | ) { |
| 3901 | interactive_fd = fcntl(STDIN_FILENO, F_DUPFD, 255); |
| 3902 | if (interactive_fd < 0) { |
| 3903 | /* try to dup to any fd */ |
| 3904 | interactive_fd = dup(STDIN_FILENO); |
| 3905 | if (interactive_fd < 0) |
| 3906 | /* give up */ |
| 3907 | interactive_fd = 0; |
| 3908 | } |
Denis Vlasenko | 08126f6 | 2008-02-11 08:39:11 +0000 | [diff] [blame] | 3909 | if (interactive_fd) |
| 3910 | fcntl(interactive_fd, F_SETFD, FD_CLOEXEC); |
Denis Vlasenko | e3f2f89 | 2007-04-28 16:48:27 +0000 | [diff] [blame] | 3911 | } |
Denis Vlasenko | b81b3df | 2007-04-28 16:48:04 +0000 | [diff] [blame] | 3912 | #endif |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 3913 | |
Denis Vlasenko | bb81c58 | 2007-01-30 22:32:09 +0000 | [diff] [blame] | 3914 | if (argv[optind] == NULL) { |
Denis Vlasenko | 170435c | 2007-05-23 13:01:10 +0000 | [diff] [blame] | 3915 | opt = parse_and_run_file(stdin); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3916 | } else { |
| 3917 | debug_printf("\nrunning script '%s'\n", argv[optind]); |
| 3918 | global_argv = argv + optind; |
| 3919 | global_argc = argc - optind; |
| 3920 | input = xfopen(argv[optind], "r"); |
Denis Vlasenko | 459a5ad | 2008-02-11 08:35:03 +0000 | [diff] [blame] | 3921 | fcntl(fileno(input), F_SETFD, FD_CLOEXEC); |
Denis Vlasenko | 05743d7 | 2008-02-10 12:10:08 +0000 | [diff] [blame] | 3922 | opt = parse_and_run_file(input); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3923 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3924 | |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3925 | final_return: |
| 3926 | |
Denis Vlasenko | 38f6319 | 2007-01-22 09:03:07 +0000 | [diff] [blame] | 3927 | #if ENABLE_FEATURE_CLEAN_UP |
Eric Andersen | aeb44c4 | 2001-05-22 20:29:00 +0000 | [diff] [blame] | 3928 | fclose(input); |
Denis Vlasenko | fbf6dea | 2007-04-13 19:56:56 +0000 | [diff] [blame] | 3929 | if (cwd != bb_msg_unknown) |
Eric Andersen | aeb44c4 | 2001-05-22 20:29:00 +0000 | [diff] [blame] | 3930 | free((char*)cwd); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3931 | cur_var = top_var->next; |
| 3932 | while (cur_var) { |
| 3933 | struct variable *tmp = cur_var; |
| 3934 | if (!cur_var->max_len) |
Denis Vlasenko | 28c0f0f | 2007-05-25 02:46:01 +0000 | [diff] [blame] | 3935 | free(cur_var->varstr); |
Denis Vlasenko | d76c049 | 2007-05-25 02:16:25 +0000 | [diff] [blame] | 3936 | cur_var = cur_var->next; |
| 3937 | free(tmp); |
Eric Andersen | aeb44c4 | 2001-05-22 20:29:00 +0000 | [diff] [blame] | 3938 | } |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3939 | #endif |
Denis Vlasenko | 54e7ffb | 2007-04-21 00:03:36 +0000 | [diff] [blame] | 3940 | hush_exit(opt ? opt : last_return_code); |
Eric Andersen | 25f2703 | 2001-04-26 23:22:31 +0000 | [diff] [blame] | 3941 | } |
Denis Vlasenko | 96702ca | 2007-11-23 23:28:55 +0000 | [diff] [blame] | 3942 | |
| 3943 | |
| 3944 | #if ENABLE_LASH |
| 3945 | int lash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 3946 | int lash_main(int argc, char **argv) |
| 3947 | { |
| 3948 | //bb_error_msg("lash is deprecated, please use hush instead"); |
| 3949 | return hush_main(argc, argv); |
| 3950 | } |
| 3951 | #endif |