Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
Erik Andersen | 6acaa40 | 2000-03-26 14:03:20 +0000 | [diff] [blame] | 3 | * lash -- the BusyBox Lame-Ass SHell |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 4 | * |
| 5 | * Copyright (C) 2000 by Lineo, inc. |
| 6 | * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> |
| 7 | * |
| 8 | * Based in part on ladsh.c by Michael K. Johnson and Erik W. Troan, which is |
| 9 | * under the following liberal license: "We have placed this source code in the |
| 10 | * public domain. Use it in any project, free or commercial." |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 20 | * General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | */ |
| 27 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 28 | /* The parsing engine of this program is officially at a dead-end. |
| 29 | * Future work in that direction should move to the work posted |
| 30 | * at http://doolittle.faludi.com/~larry/parser.html . |
| 31 | * A start on the integration of that work with the rest of sh.c |
| 32 | * is at http://codepoet.org/sh.c . |
| 33 | */ |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 34 | // |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 35 | //This works pretty well now, and is now on by default. |
Eric Andersen | 06f64b2 | 2000-09-19 07:16:39 +0000 | [diff] [blame] | 36 | #define BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 37 | // |
| 38 | //Backtick support has some problems, use at your own risk! |
| 39 | //#define BB_FEATURE_SH_BACKTICKS |
| 40 | // |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 41 | //If, then, else, etc. support.. This should now behave basically |
| 42 | //like any other Bourne shell... |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 43 | #define BB_FEATURE_SH_IF_EXPRESSIONS |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 44 | // |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 45 | /* This is currently a little broken... */ |
| 46 | //#define HANDLE_CONTINUATION_CHARS |
| 47 | // |
Eric Andersen | 1e7cea9 | 2000-12-06 23:47:38 +0000 | [diff] [blame] | 48 | //For debugging/development on the shell only... |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 49 | //#define DEBUG_SHELL |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 50 | |
| 51 | |
Eric Andersen | 3570a34 | 2000-09-25 21:45:58 +0000 | [diff] [blame] | 52 | #include "busybox.h" |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 53 | #include <stdio.h> |
| 54 | #include <stdlib.h> |
| 55 | #include <ctype.h> |
| 56 | #include <errno.h> |
| 57 | #include <fcntl.h> |
| 58 | #include <glob.h> |
| 59 | #include <signal.h> |
| 60 | #include <string.h> |
| 61 | #include <sys/ioctl.h> |
| 62 | #include <sys/wait.h> |
| 63 | #include <unistd.h> |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 64 | #include <getopt.h> |
Erik Andersen | f0657d3 | 2000-04-12 17:49:52 +0000 | [diff] [blame] | 65 | #include "cmdedit.h" |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 66 | |
Mark Whitley | 59ab025 | 2001-01-23 22:30:04 +0000 | [diff] [blame^] | 67 | static const int MAX_LINE = 256; /* size of input buffer for cwd data */ |
| 68 | static const int MAX_READ = 128; /* size of input buffer for `read' builtin */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 69 | #define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n" |
Eric Andersen | 8c725e6 | 2000-11-30 00:27:06 +0000 | [diff] [blame] | 70 | extern size_t NUM_APPLETS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 71 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 72 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 73 | enum redir_type { REDIRECT_INPUT, REDIRECT_OVERWRITE, |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 74 | REDIRECT_APPEND |
| 75 | }; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 76 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 77 | static const unsigned int DEFAULT_CONTEXT=0x1; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 78 | static const unsigned int IF_TRUE_CONTEXT=0x2; |
| 79 | static const unsigned int IF_FALSE_CONTEXT=0x4; |
| 80 | static const unsigned int THEN_EXP_CONTEXT=0x8; |
| 81 | static const unsigned int ELSE_EXP_CONTEXT=0x10; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 82 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 83 | |
| 84 | struct jobset { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 85 | struct job *head; /* head of list of running jobs */ |
| 86 | struct job *fg; /* current foreground job */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 87 | }; |
| 88 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 89 | struct redir_struct { |
| 90 | enum redir_type type; /* type of redirection */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 91 | int fd; /* file descriptor being redirected */ |
| 92 | char *filename; /* file to redirect fd to */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 93 | }; |
| 94 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 95 | struct child_prog { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 96 | pid_t pid; /* 0 if exited */ |
| 97 | char **argv; /* program name and arguments */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 98 | int num_redirects; /* elements in redirection array */ |
| 99 | struct redir_struct *redirects; /* I/O redirects */ |
| 100 | glob_t glob_result; /* result of parameter globbing */ |
| 101 | int free_glob; /* should we globfree(&glob_result)? */ |
| 102 | int is_stopped; /* is the program currently running? */ |
| 103 | struct job *family; /* pointer back to the child's parent job */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | struct job { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 107 | int jobid; /* job number */ |
| 108 | int num_progs; /* total number of programs in job */ |
| 109 | int running_progs; /* number of programs running */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 110 | char *text; /* name of job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 111 | char *cmdbuf; /* buffer various argv's point into */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 112 | pid_t pgrp; /* process group ID for the job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 113 | struct child_prog *progs; /* array of programs in job */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 114 | struct job *next; /* to track background commands */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 115 | int stopped_progs; /* number of programs alive, but stopped */ |
| 116 | unsigned int job_context; /* bitmask defining current context */ |
| 117 | struct jobset *job_list; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 118 | }; |
| 119 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 120 | struct built_in_command { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 121 | char *cmd; /* name */ |
| 122 | char *descr; /* description */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 123 | int (*function) (struct child_prog *); /* function ptr */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 124 | }; |
| 125 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 126 | struct close_me { |
| 127 | int fd; |
| 128 | struct close_me *next; |
| 129 | }; |
| 130 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 131 | /* function prototypes for builtins */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 132 | static int builtin_cd(struct child_prog *cmd); |
| 133 | static int builtin_env(struct child_prog *dummy); |
| 134 | static int builtin_exec(struct child_prog *cmd); |
| 135 | static int builtin_exit(struct child_prog *cmd); |
| 136 | static int builtin_fg_bg(struct child_prog *cmd); |
| 137 | static int builtin_help(struct child_prog *cmd); |
| 138 | static int builtin_jobs(struct child_prog *dummy); |
| 139 | static int builtin_pwd(struct child_prog *dummy); |
| 140 | static int builtin_export(struct child_prog *cmd); |
| 141 | static int builtin_source(struct child_prog *cmd); |
| 142 | static int builtin_unset(struct child_prog *cmd); |
| 143 | static int builtin_read(struct child_prog *cmd); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 144 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 145 | static int builtin_if(struct child_prog *cmd); |
| 146 | static int builtin_then(struct child_prog *cmd); |
| 147 | static int builtin_else(struct child_prog *cmd); |
| 148 | static int builtin_fi(struct child_prog *cmd); |
Eric Andersen | 70da6a6 | 2000-12-20 22:59:16 +0000 | [diff] [blame] | 149 | /* function prototypes for shell stuff */ |
| 150 | static int run_command_predicate(char *cmd); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 151 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 152 | |
Eric Andersen | 34e1941 | 2000-07-10 18:47:24 +0000 | [diff] [blame] | 153 | |
| 154 | /* function prototypes for shell stuff */ |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 155 | static void mark_open(int fd); |
| 156 | static void mark_closed(int fd); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 157 | static void checkjobs(struct jobset *job_list); |
| 158 | static int get_command(FILE * source, char *command); |
| 159 | static int parse_command(char **command_ptr, struct job *job, int *inbg); |
| 160 | static int run_command(struct job *newjob, int inbg, int outpipe[2]); |
| 161 | static int pseudo_exec(struct child_prog *cmd) __attribute__ ((noreturn)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 162 | static int busy_loop(FILE * input); |
| 163 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 164 | |
Mark Whitley | 37653aa | 2000-07-12 23:36:17 +0000 | [diff] [blame] | 165 | /* Table of built-in functions (these are non-forking builtins, meaning they |
| 166 | * can change global variables in the parent shell process but they will not |
| 167 | * work with pipes and redirects; 'unset foo | whatever' will not work) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 168 | static struct built_in_command bltins[] = { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 169 | {"bg", "Resume a job in the background", builtin_fg_bg}, |
| 170 | {"cd", "Change working directory", builtin_cd}, |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 171 | {"exec", "Exec command, replacing this shell with the exec'd process", builtin_exec}, |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 172 | {"exit", "Exit from shell()", builtin_exit}, |
| 173 | {"fg", "Bring job into the foreground", builtin_fg_bg}, |
| 174 | {"jobs", "Lists the active jobs", builtin_jobs}, |
| 175 | {"export", "Set environment variable", builtin_export}, |
| 176 | {"unset", "Unset environment variable", builtin_unset}, |
| 177 | {"read", "Input environment variable", builtin_read}, |
Matt Kraai | dd450a0 | 2000-09-13 03:43:36 +0000 | [diff] [blame] | 178 | {".", "Source-in and run commands in a file", builtin_source}, |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 179 | /* to do: add ulimit */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 180 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 181 | {"if", NULL, builtin_if}, |
| 182 | {"then", NULL, builtin_then}, |
| 183 | {"else", NULL, builtin_else}, |
| 184 | {"fi", NULL, builtin_fi}, |
| 185 | #endif |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 186 | {NULL, NULL, NULL} |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 187 | }; |
| 188 | |
Mark Whitley | 37653aa | 2000-07-12 23:36:17 +0000 | [diff] [blame] | 189 | /* Table of forking built-in functions (things that fork cannot change global |
| 190 | * variables in the parent process, such as the current working directory) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 191 | static struct built_in_command bltins_forking[] = { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 192 | {"env", "Print all environment variables", builtin_env}, |
| 193 | {"pwd", "Print current directory", builtin_pwd}, |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 194 | {"help", "List shell built-in commands", builtin_help}, |
| 195 | {NULL, NULL, NULL} |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 196 | }; |
| 197 | |
Eric Andersen | 0bcc813 | 2001-01-05 19:37:32 +0000 | [diff] [blame] | 198 | |
| 199 | /* Variables we export */ |
| 200 | unsigned int shell_context; /* Used in cmdedit.c to reset the |
| 201 | context when someone hits ^C */ |
| 202 | |
| 203 | |
| 204 | /* Globals that are static to this file */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 205 | static char *cwd; |
Eric Andersen | 744b064 | 2001-01-05 21:23:44 +0000 | [diff] [blame] | 206 | static char *local_pending_command = NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 207 | static struct jobset job_list = { NULL, NULL }; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 208 | static int argc; |
| 209 | static char **argv; |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 210 | static struct close_me *close_me_head = NULL; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 211 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 212 | static int last_bg_pid=-1; |
| 213 | static int last_return_code=-1; |
| 214 | static int show_x_trace=FALSE; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 215 | #endif |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 216 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 217 | static char syntax_err[]="syntax error near unexpected token"; |
| 218 | #endif |
| 219 | |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 220 | #ifdef DEBUG_SHELL |
| 221 | static inline void debug_printf(const char *format, ...) |
| 222 | { |
| 223 | va_list args; |
| 224 | va_start(args, format); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 225 | vfprintf(stderr, format, args); |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 226 | va_end(args); |
| 227 | } |
| 228 | #else |
| 229 | static inline void debug_printf(const char *format, ...) { } |
| 230 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 231 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 232 | /* |
| 233 | Most builtins need access to the struct child_prog that has |
| 234 | their arguments, previously coded as cmd->progs[0]. That coding |
| 235 | can exhibit a bug, if the builtin is not the first command in |
| 236 | a pipeline: "echo foo | exec sort" will attempt to exec foo. |
| 237 | |
| 238 | builtin previous use notes |
| 239 | ------ ----------------- --------- |
| 240 | cd cmd->progs[0] |
| 241 | env 0 |
| 242 | exec cmd->progs[0] squashed bug: didn't look for applets or forking builtins |
| 243 | exit cmd->progs[0] |
| 244 | fg_bg cmd->progs[0], job_list->head, job_list->fg |
| 245 | help 0 |
| 246 | jobs job_list->head |
| 247 | pwd 0 |
| 248 | export cmd->progs[0] passes cmd, job_list to builtin_env(), which ignores them |
| 249 | source cmd->progs[0] |
| 250 | unset cmd->progs[0] |
| 251 | read cmd->progs[0] |
| 252 | if cmd->job_context, cmd->text |
| 253 | then cmd->job_context, cmd->text |
| 254 | else cmd->job_context, cmd->text |
| 255 | fi cmd->job_context |
| 256 | |
| 257 | The use of cmd->text by if/then/else/fi is hopelessly hacky. |
| 258 | Would it work to increment cmd->progs[0]->argv and recurse, |
| 259 | somewhat like builtin_exec does? |
| 260 | |
| 261 | I added "struct job *family;" to struct child_prog, |
| 262 | and switched API to builtin_foo(struct child_prog *child); |
| 263 | So cmd->text becomes child->family->text |
| 264 | cmd->job_context becomes child->family->job_context |
| 265 | cmd->progs[0] becomes *child |
| 266 | job_list becomes child->family->job_list |
| 267 | */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 268 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 269 | /* built-in 'cd <path>' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 270 | static int builtin_cd(struct child_prog *child) |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 271 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 272 | char *newdir; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 273 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 274 | if (child->argv[1] == NULL) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 275 | newdir = getenv("HOME"); |
| 276 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 277 | newdir = child->argv[1]; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 278 | if (chdir(newdir)) { |
| 279 | printf("cd: %s: %s\n", newdir, strerror(errno)); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 280 | return EXIT_FAILURE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 281 | } |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 282 | getcwd(cwd, sizeof(char)*MAX_LINE); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 283 | |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 284 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | /* built-in 'env' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 288 | static int builtin_env(struct child_prog *dummy) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 289 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 290 | char **e; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 291 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 292 | for (e = environ; *e; e++) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 293 | printf( "%s\n", *e); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 294 | } |
| 295 | return (0); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 296 | } |
| 297 | |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 298 | /* built-in 'exec' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 299 | static int builtin_exec(struct child_prog *child) |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 300 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 301 | if (child->argv[1] == NULL) |
| 302 | return EXIT_SUCCESS; /* Really? */ |
| 303 | child->argv++; |
| 304 | pseudo_exec(child); |
| 305 | /* never returns */ |
Eric Andersen | d2f5677 | 2000-09-21 02:48:07 +0000 | [diff] [blame] | 306 | } |
| 307 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 308 | /* built-in 'exit' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 309 | static int builtin_exit(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 310 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 311 | if (child->argv[1] == NULL) |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 312 | exit(EXIT_SUCCESS); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 313 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 314 | exit (atoi(child->argv[1])); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 315 | } |
| 316 | |
| 317 | /* built-in 'fg' and 'bg' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 318 | static int builtin_fg_bg(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 319 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 320 | int i, jobNum; |
Erik Andersen | 6273f65 | 2000-03-17 01:12:41 +0000 | [diff] [blame] | 321 | struct job *job=NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 322 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 323 | if (!child->argv[1] || child->argv[2]) { |
| 324 | error_msg("%s: exactly one argument is expected\n", |
| 325 | child->argv[0]); |
| 326 | return EXIT_FAILURE; |
| 327 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 328 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 329 | if (sscanf(child->argv[1], "%%%d", &jobNum) != 1) { |
| 330 | error_msg("%s: bad argument '%s'\n", |
| 331 | child->argv[0], child->argv[1]); |
| 332 | return EXIT_FAILURE; |
| 333 | } |
| 334 | |
| 335 | for (job = child->family->job_list->head; job; job = job->next) { |
| 336 | if (job->jobid == jobNum) { |
| 337 | break; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 338 | } |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 339 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 340 | |
| 341 | if (!job) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 342 | error_msg("%s: unknown job %d\n", |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 343 | child->argv[0], jobNum); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 344 | return EXIT_FAILURE; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 345 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 346 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 347 | if (*child->argv[0] == 'f') { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 348 | /* Make this job the foreground job */ |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 349 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 350 | if (tcsetpgrp(0, job->pgrp) && errno != ENOTTY) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 351 | perror_msg("tcsetpgrp"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 352 | child->family->job_list->fg = job; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 353 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 354 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 355 | /* Restart the processes in the job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 356 | for (i = 0; i < job->num_progs; i++) |
| 357 | job->progs[i].is_stopped = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 358 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 359 | kill(-job->pgrp, SIGCONT); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 360 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 361 | job->stopped_progs = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 362 | |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 363 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | /* built-in 'help' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 367 | static int builtin_help(struct child_prog *dummy) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 368 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 369 | struct built_in_command *x; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 370 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 371 | printf("\nBuilt-in commands:\n"); |
| 372 | printf("-------------------\n"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 373 | for (x = bltins; x->cmd; x++) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 374 | if (x->descr==NULL) |
| 375 | continue; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 376 | printf("%s\t%s\n", x->cmd, x->descr); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 377 | } |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 378 | for (x = bltins_forking; x->cmd; x++) { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 379 | if (x->descr==NULL) |
| 380 | continue; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 381 | printf("%s\t%s\n", x->cmd, x->descr); |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 382 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 383 | printf("\n\n"); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 384 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | /* built-in 'jobs' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 388 | static int builtin_jobs(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 389 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 390 | struct job *job; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 391 | char *status_string; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 392 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 393 | for (job = child->family->job_list->head; job; job = job->next) { |
| 394 | if (job->running_progs == job->stopped_progs) |
| 395 | status_string = "Stopped"; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 396 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 397 | status_string = "Running"; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 398 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 399 | printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->text); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 400 | } |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 401 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | |
| 405 | /* built-in 'pwd' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 406 | static int builtin_pwd(struct child_prog *dummy) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 407 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 408 | getcwd(cwd, MAX_LINE); |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 409 | printf( "%s\n", cwd); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 410 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 411 | } |
| 412 | |
Erik Andersen | 6273f65 | 2000-03-17 01:12:41 +0000 | [diff] [blame] | 413 | /* built-in 'export VAR=value' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 414 | static int builtin_export(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 415 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 416 | int res; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 417 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 418 | if (child->argv[1] == NULL) { |
| 419 | return (builtin_env(child)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 420 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 421 | res = putenv(child->argv[1]); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 422 | if (res) |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 423 | fprintf(stderr, "export: %s\n", strerror(errno)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 424 | return (res); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 425 | } |
| 426 | |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 427 | /* built-in 'read VAR' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 428 | static int builtin_read(struct child_prog *child) |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 429 | { |
| 430 | int res = 0, len, newlen; |
| 431 | char *s; |
| 432 | char string[MAX_READ]; |
| 433 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 434 | if (child->argv[1]) { |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 435 | /* argument (VAR) given: put "VAR=" into buffer */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 436 | strcpy(string, child->argv[1]); |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 437 | len = strlen(string); |
| 438 | string[len++] = '='; |
| 439 | string[len] = '\0'; |
| 440 | fgets(&string[len], sizeof(string) - len, stdin); /* read string */ |
| 441 | newlen = strlen(string); |
| 442 | if(newlen > len) |
| 443 | string[--newlen] = '\0'; /* chomp trailing newline */ |
| 444 | /* |
| 445 | ** string should now contain "VAR=<value>" |
| 446 | ** copy it (putenv() won't do that, so we must make sure |
| 447 | ** the string resides in a static buffer!) |
| 448 | */ |
| 449 | res = -1; |
| 450 | if((s = strdup(string))) |
| 451 | res = putenv(s); |
| 452 | if (res) |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 453 | fprintf(stderr, "read: %s\n", strerror(errno)); |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 454 | } |
| 455 | else |
| 456 | fgets(string, sizeof(string), stdin); |
| 457 | |
| 458 | return (res); |
| 459 | } |
| 460 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 461 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
| 462 | /* Built-in handler for 'if' commands */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 463 | static int builtin_if(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 464 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 465 | struct job *cmd = child->family; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 466 | int status; |
| 467 | char* charptr1=cmd->text+3; /* skip over the leading 'if ' */ |
| 468 | |
| 469 | /* Now run the 'if' command */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 470 | debug_printf( "job=%p entering builtin_if ('%s')-- context=%d\n", cmd, charptr1, cmd->job_context); |
| 471 | status = run_command_predicate(charptr1); |
| 472 | debug_printf( "if test returned "); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 473 | if (status == 0) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 474 | debug_printf( "TRUE\n"); |
| 475 | cmd->job_context |= IF_TRUE_CONTEXT; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 476 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 477 | debug_printf( "FALSE\n"); |
| 478 | cmd->job_context |= IF_FALSE_CONTEXT; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 479 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 480 | debug_printf("job=%p builtin_if set job context to %x\n", cmd, cmd->job_context); |
| 481 | shell_context++; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 482 | |
| 483 | return status; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 484 | } |
| 485 | |
| 486 | /* Built-in handler for 'then' (part of the 'if' command) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 487 | static int builtin_then(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 488 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 489 | struct job *cmd = child->family; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 490 | char* charptr1=cmd->text+5; /* skip over the leading 'then ' */ |
| 491 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 492 | debug_printf( "job=%p entering builtin_then ('%s')-- context=%d\n", cmd, charptr1, cmd->job_context); |
| 493 | if (! (cmd->job_context & (IF_TRUE_CONTEXT|IF_FALSE_CONTEXT))) { |
| 494 | shell_context = 0; /* Reset the shell's context on an error */ |
| 495 | error_msg("%s `then'\n", syntax_err); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 496 | return EXIT_FAILURE; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 497 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 498 | |
| 499 | cmd->job_context |= THEN_EXP_CONTEXT; |
| 500 | debug_printf("job=%p builtin_then set job context to %x\n", cmd, cmd->job_context); |
| 501 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 502 | /* If the if result was FALSE, skip the 'then' stuff */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 503 | if (cmd->job_context & IF_FALSE_CONTEXT) { |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 504 | return EXIT_SUCCESS; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 505 | } |
| 506 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 507 | /* Seems the if result was TRUE, so run the 'then' command */ |
| 508 | debug_printf( "'then' now running '%s'\n", charptr1); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 509 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 510 | return(run_command_predicate(charptr1)); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | /* Built-in handler for 'else' (part of the 'if' command) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 514 | static int builtin_else(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 515 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 516 | struct job *cmd = child->family; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 517 | char* charptr1=cmd->text+5; /* skip over the leading 'else ' */ |
| 518 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 519 | debug_printf( "job=%p entering builtin_else ('%s')-- context=%d\n", cmd, charptr1, cmd->job_context); |
| 520 | |
| 521 | if (! (cmd->job_context & THEN_EXP_CONTEXT)) { |
| 522 | shell_context = 0; /* Reset the shell's context on an error */ |
| 523 | error_msg("%s `else'\n", syntax_err); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 524 | return EXIT_FAILURE; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 525 | } |
| 526 | /* If the if result was TRUE, skip the 'else' stuff */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 527 | if (cmd->job_context & IF_TRUE_CONTEXT) { |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 528 | return EXIT_SUCCESS; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 529 | } |
| 530 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 531 | cmd->job_context |= ELSE_EXP_CONTEXT; |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 532 | debug_printf("job=%p builtin_else set job context to %x\n", cmd, cmd->job_context); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 533 | |
| 534 | /* Now run the 'else' command */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 535 | debug_printf( "'else' now running '%s'\n", charptr1); |
| 536 | return(run_command_predicate(charptr1)); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | /* Built-in handler for 'fi' (part of the 'if' command) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 540 | static int builtin_fi(struct child_prog *child) |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 541 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 542 | struct job *cmd = child->family; |
| 543 | debug_printf( "job=%p entering builtin_fi ('%s')-- context=%d\n", cmd, "", cmd->job_context); |
| 544 | if (! (cmd->job_context & (IF_TRUE_CONTEXT|IF_FALSE_CONTEXT))) { |
| 545 | shell_context = 0; /* Reset the shell's context on an error */ |
| 546 | error_msg("%s `fi'\n", syntax_err); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 547 | return EXIT_FAILURE; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 548 | } |
| 549 | /* Clear out the if and then context bits */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 550 | cmd->job_context &= ~(IF_TRUE_CONTEXT|IF_FALSE_CONTEXT|THEN_EXP_CONTEXT|ELSE_EXP_CONTEXT); |
| 551 | debug_printf("job=%p builtin_fi set job context to %x\n", cmd, cmd->job_context); |
| 552 | shell_context--; |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 553 | return EXIT_SUCCESS; |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 554 | } |
| 555 | #endif |
| 556 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 557 | /* Built-in '.' handler (read-in and execute commands from file) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 558 | static int builtin_source(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 559 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 560 | FILE *input; |
| 561 | int status; |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 562 | int fd; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 563 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 564 | if (child->argv[1] == NULL) |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 565 | return EXIT_FAILURE; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 566 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 567 | input = fopen(child->argv[1], "r"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 568 | if (!input) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 569 | printf( "Couldn't open file '%s'\n", child->argv[1]); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 570 | return EXIT_FAILURE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 571 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 572 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 573 | fd=fileno(input); |
| 574 | mark_open(fd); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 575 | /* Now run the file */ |
| 576 | status = busy_loop(input); |
Matt Kraai | dd450a0 | 2000-09-13 03:43:36 +0000 | [diff] [blame] | 577 | fclose(input); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 578 | mark_closed(fd); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 579 | return (status); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | /* built-in 'unset VAR' handler */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 583 | static int builtin_unset(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 584 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 585 | if (child->argv[1] == NULL) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 586 | printf( "unset: parameter required.\n"); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 587 | return EXIT_FAILURE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 588 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 589 | unsetenv(child->argv[1]); |
Matt Kraai | 3e856ce | 2000-12-01 02:55:13 +0000 | [diff] [blame] | 590 | return EXIT_SUCCESS; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 591 | } |
| 592 | |
Eric Andersen | 70da6a6 | 2000-12-20 22:59:16 +0000 | [diff] [blame] | 593 | #ifdef BB_FEATURE_SH_IF_EXPRESSIONS |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 594 | /* currently used by if/then/else. |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 595 | * |
| 596 | * Reparsing the command line for this purpose is gross, |
| 597 | * incorrect, and fundamentally unfixable; in particular, |
| 598 | * think about what happens with command substitution. |
| 599 | * We really need to pull out the run, wait, return status |
| 600 | * functionality out of busy_loop so we can child->argv++ |
| 601 | * and use that, without going back through parse_command. |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 602 | */ |
| 603 | static int run_command_predicate(char *cmd) |
| 604 | { |
| 605 | int n=strlen(cmd); |
| 606 | local_pending_command = xmalloc(n+1); |
| 607 | strncpy(local_pending_command, cmd, n); |
| 608 | local_pending_command[n]='\0'; |
| 609 | return( busy_loop(NULL)); |
| 610 | } |
Eric Andersen | 70da6a6 | 2000-12-20 22:59:16 +0000 | [diff] [blame] | 611 | #endif |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 612 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 613 | static void mark_open(int fd) |
| 614 | { |
| 615 | struct close_me *new = xmalloc(sizeof(struct close_me)); |
| 616 | new->fd = fd; |
| 617 | new->next = close_me_head; |
| 618 | close_me_head = new; |
| 619 | } |
| 620 | |
| 621 | static void mark_closed(int fd) |
| 622 | { |
| 623 | struct close_me *tmp; |
| 624 | if (close_me_head == NULL || close_me_head->fd != fd) |
| 625 | error_msg_and_die("corrupt close_me"); |
| 626 | tmp = close_me_head; |
| 627 | close_me_head = close_me_head->next; |
| 628 | free(tmp); |
| 629 | } |
| 630 | |
| 631 | static void close_all() |
| 632 | { |
| 633 | struct close_me *c; |
| 634 | for (c=close_me_head; c; c=c->next) { |
| 635 | close(c->fd); |
| 636 | } |
| 637 | close_me_head = NULL; |
| 638 | } |
| 639 | |
| 640 | |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 641 | /* free up all memory from a job */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 642 | static void free_job(struct job *cmd) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 643 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 644 | int i; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 645 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 646 | for (i = 0; i < cmd->num_progs; i++) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 647 | free(cmd->progs[i].argv); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 648 | if (cmd->progs[i].redirects) |
| 649 | free(cmd->progs[i].redirects); |
| 650 | if (cmd->progs[i].free_glob) |
| 651 | globfree(&cmd->progs[i].glob_result); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 652 | } |
| 653 | free(cmd->progs); |
| 654 | if (cmd->text) |
| 655 | free(cmd->text); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 656 | free(cmd->cmdbuf); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 657 | memset(cmd, 0, sizeof(struct job)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 658 | } |
| 659 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 660 | /* remove a job from the job_list */ |
| 661 | static void remove_job(struct jobset *job_list, struct job *job) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 662 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 663 | struct job *prevjob; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 664 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 665 | free_job(job); |
| 666 | if (job == job_list->head) { |
| 667 | job_list->head = job->next; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 668 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 669 | prevjob = job_list->head; |
| 670 | while (prevjob->next != job) |
| 671 | prevjob = prevjob->next; |
| 672 | prevjob->next = job->next; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 673 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 674 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 675 | free(job); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | /* Checks to see if any background processes have exited -- if they |
| 679 | have, figure out why and see if a job has completed */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 680 | static void checkjobs(struct jobset *job_list) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 681 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 682 | struct job *job; |
| 683 | pid_t childpid; |
| 684 | int status; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 685 | int prognum = 0; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 686 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 687 | while ((childpid = waitpid(-1, &status, WNOHANG | WUNTRACED)) > 0) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 688 | for (job = job_list->head; job; job = job->next) { |
| 689 | prognum = 0; |
| 690 | while (prognum < job->num_progs && |
| 691 | job->progs[prognum].pid != childpid) prognum++; |
| 692 | if (prognum < job->num_progs) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 693 | break; |
| 694 | } |
| 695 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 696 | /* This happens on backticked commands */ |
| 697 | if(job==NULL) |
| 698 | return; |
| 699 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 700 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
| 701 | /* child exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 702 | job->running_progs--; |
| 703 | job->progs[prognum].pid = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 704 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 705 | if (!job->running_progs) { |
| 706 | printf(JOB_STATUS_FORMAT, job->jobid, "Done", job->text); |
| 707 | remove_job(job_list, job); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 708 | } |
| 709 | } else { |
| 710 | /* child stopped */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 711 | job->stopped_progs++; |
| 712 | job->progs[prognum].is_stopped = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 713 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 714 | if (job->stopped_progs == job->num_progs) { |
| 715 | printf(JOB_STATUS_FORMAT, job->jobid, "Stopped", |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 716 | job->text); |
| 717 | } |
| 718 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 719 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 720 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 721 | if (childpid == -1 && errno != ECHILD) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 722 | perror_msg("waitpid"); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 723 | } |
| 724 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 725 | /* squirrel != NULL means we squirrel away copies of stdin, stdout, |
| 726 | * and stderr if they are redirected. */ |
| 727 | static int setup_redirects(struct child_prog *prog, int squirrel[]) |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 728 | { |
| 729 | int i; |
| 730 | int openfd; |
| 731 | int mode = O_RDONLY; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 732 | struct redir_struct *redir = prog->redirects; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 733 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 734 | for (i = 0; i < prog->num_redirects; i++, redir++) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 735 | switch (redir->type) { |
| 736 | case REDIRECT_INPUT: |
| 737 | mode = O_RDONLY; |
| 738 | break; |
| 739 | case REDIRECT_OVERWRITE: |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 740 | mode = O_WRONLY | O_CREAT | O_TRUNC; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 741 | break; |
| 742 | case REDIRECT_APPEND: |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 743 | mode = O_WRONLY | O_CREAT | O_APPEND; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 744 | break; |
| 745 | } |
| 746 | |
| 747 | openfd = open(redir->filename, mode, 0666); |
| 748 | if (openfd < 0) { |
| 749 | /* this could get lost if stderr has been redirected, but |
| 750 | bash and ash both lose it as well (though zsh doesn't!) */ |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 751 | error_msg("error opening %s: %s\n", redir->filename, |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 752 | strerror(errno)); |
| 753 | return 1; |
| 754 | } |
| 755 | |
| 756 | if (openfd != redir->fd) { |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 757 | if (squirrel && redir->fd < 3) { |
| 758 | squirrel[redir->fd] = dup(redir->fd); |
| 759 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 760 | dup2(openfd, redir->fd); |
| 761 | close(openfd); |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | return 0; |
| 766 | } |
| 767 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 768 | static void restore_redirects(int squirrel[]) |
| 769 | { |
| 770 | int i, fd; |
| 771 | for (i=0; i<3; i++) { |
| 772 | fd = squirrel[i]; |
| 773 | if (fd != -1) { |
| 774 | /* No error checking. I sure wouldn't know what |
| 775 | * to do with an error if I found one! */ |
| 776 | dup2(fd, i); |
| 777 | close(fd); |
| 778 | } |
| 779 | } |
| 780 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 781 | |
Eric Andersen | 09acc06 | 2001-01-04 11:10:38 +0000 | [diff] [blame] | 782 | static char* setup_prompt_string(int state) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 783 | { |
Eric Andersen | f361ac2 | 2000-12-12 23:45:36 +0000 | [diff] [blame] | 784 | char user[9],buf[255],*s; |
Eric Andersen | 09acc06 | 2001-01-04 11:10:38 +0000 | [diff] [blame] | 785 | char prompt[3]; |
| 786 | char prompt_str[BUFSIZ]; |
| 787 | |
| 788 | /* Set up the prompt */ |
| 789 | if (state == 0) { |
| 790 | /* get User Name and setup prompt */ |
| 791 | strcpy(prompt,( geteuid() != 0 ) ? "$ ":"# "); |
| 792 | my_getpwuid(user, geteuid()); |
| 793 | |
| 794 | /* get HostName */ |
| 795 | gethostname(buf, 255); |
| 796 | s = strchr(buf, '.'); |
| 797 | if (s) { |
| 798 | *s = 0; |
| 799 | } |
| 800 | } else { |
| 801 | strcpy(prompt,"> "); |
| 802 | } |
| 803 | |
| 804 | if (state == 0) { |
| 805 | snprintf(prompt_str, BUFSIZ-1, "[%s@%s %s]%s", user, buf, |
| 806 | get_last_path_component(cwd), prompt); |
| 807 | } else { |
| 808 | sprintf(prompt_str, "%s", prompt); |
| 809 | } |
| 810 | return(strdup(prompt_str)); /* Must free this memory */ |
| 811 | } |
| 812 | |
| 813 | static int get_command(FILE * source, char *command) |
| 814 | { |
| 815 | char *prompt_str; |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 816 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 817 | if (source == NULL) { |
| 818 | if (local_pending_command) { |
| 819 | /* a command specified (-c option): return it & mark it done */ |
| 820 | strcpy(command, local_pending_command); |
| 821 | free(local_pending_command); |
| 822 | local_pending_command = NULL; |
| 823 | return 0; |
| 824 | } |
| 825 | return 1; |
| 826 | } |
| 827 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 828 | if (source == stdin) { |
Matt Kraai | defcd5e | 2001-01-05 02:53:11 +0000 | [diff] [blame] | 829 | prompt_str = setup_prompt_string(shell_context); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 830 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 831 | #ifdef BB_FEATURE_SH_COMMAND_EDITING |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 832 | /* |
| 833 | ** enable command line editing only while a command line |
| 834 | ** is actually being read; otherwise, we'll end up bequeathing |
| 835 | ** atexit() handlers and other unwanted stuff to our |
| 836 | ** child processes (rob@sysgo.de) |
| 837 | */ |
| 838 | cmdedit_init(); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 839 | cmdedit_read_input(prompt_str, command); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 840 | free(prompt_str); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 841 | cmdedit_terminate(); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 842 | return 0; |
Erik Andersen | c7c634b | 2000-03-19 05:28:55 +0000 | [diff] [blame] | 843 | #else |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 844 | fputs(prompt_str, stdout); |
| 845 | free(prompt_str); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 846 | #endif |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 847 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 848 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 849 | if (!fgets(command, BUFSIZ - 2, source)) { |
| 850 | if (source == stdin) |
| 851 | printf("\n"); |
| 852 | return 1; |
| 853 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 854 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 855 | /* remove trailing newline */ |
| 856 | command[strlen(command) - 1] = '\0'; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 857 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 858 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 859 | } |
| 860 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 861 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 862 | static char* itoa(register int i) |
| 863 | { |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 864 | static char a[7]; /* Max 7 ints */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 865 | register char *b = a + sizeof(a) - 1; |
| 866 | int sign = (i < 0); |
| 867 | |
| 868 | if (sign) |
| 869 | i = -i; |
| 870 | *b = 0; |
| 871 | do |
| 872 | { |
| 873 | *--b = '0' + (i % 10); |
| 874 | i /= 10; |
| 875 | } |
| 876 | while (i); |
| 877 | if (sign) |
| 878 | *--b = '-'; |
| 879 | return b; |
| 880 | } |
| 881 | #endif |
| 882 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 883 | static void expand_argument(struct child_prog *prog, int *argcPtr, |
| 884 | int *argv_alloced_ptr) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 885 | { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 886 | int argc_l = *argcPtr; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 887 | int argv_alloced = *argv_alloced_ptr; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 888 | int rc; |
| 889 | int flags; |
| 890 | int i; |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 891 | char *src, *dst, *var; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 892 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 893 | if (argc_l > 1) { /* cmd->glob_result is already initialized */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 894 | flags = GLOB_APPEND; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 895 | i = prog->glob_result.gl_pathc; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 896 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 897 | prog->free_glob = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 898 | flags = 0; |
| 899 | i = 0; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 900 | } |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 901 | /* do shell variable substitution */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 902 | if(*prog->argv[argc_l - 1] == '$') { |
| 903 | if ((var = getenv(prog->argv[argc_l - 1] + 1))) { |
| 904 | prog->argv[argc_l - 1] = var; |
| 905 | } |
| 906 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 907 | else { |
| 908 | switch(*(prog->argv[argc_l - 1] + 1)) { |
| 909 | case '?': |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 910 | prog->argv[argc_l - 1] = itoa(last_return_code); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 911 | break; |
| 912 | case '$': |
| 913 | prog->argv[argc_l - 1] = itoa(getpid()); |
| 914 | break; |
| 915 | case '#': |
| 916 | prog->argv[argc_l - 1] = itoa(argc-1); |
| 917 | break; |
| 918 | case '!': |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 919 | if (last_bg_pid==-1) |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 920 | *(prog->argv[argc_l - 1])='\0'; |
| 921 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 922 | prog->argv[argc_l - 1] = itoa(last_bg_pid); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 923 | break; |
| 924 | case '0':case '1':case '2':case '3':case '4': |
| 925 | case '5':case '6':case '7':case '8':case '9': |
| 926 | { |
| 927 | int index=*(prog->argv[argc_l - 1] + 1)-48; |
| 928 | if (index >= argc) { |
| 929 | *(prog->argv[argc_l - 1])='\0'; |
| 930 | } else { |
| 931 | prog->argv[argc_l - 1] = argv[index]; |
| 932 | } |
| 933 | } |
| 934 | break; |
| 935 | } |
| 936 | } |
| 937 | #endif |
| 938 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 939 | |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 940 | if (strpbrk(prog->argv[argc_l - 1],"*[]?")!= NULL){ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 941 | rc = glob(prog->argv[argc_l - 1], flags, NULL, &prog->glob_result); |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 942 | if (rc == GLOB_NOSPACE) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 943 | error_msg("out of space during glob operation\n"); |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 944 | return; |
| 945 | } else if (rc == GLOB_NOMATCH || |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 946 | (!rc && (prog->glob_result.gl_pathc - i) == 1 && |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 947 | strcmp(prog->argv[argc_l - 1], |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 948 | prog->glob_result.gl_pathv[i]) == 0)) { |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 949 | /* we need to remove whatever \ quoting is still present */ |
| 950 | src = dst = prog->argv[argc_l - 1]; |
| 951 | while (*src) { |
Eric Andersen | 8c2d3f4 | 2000-11-30 00:03:57 +0000 | [diff] [blame] | 952 | if (*src == '\\') { |
| 953 | src++; |
| 954 | *dst++ = process_escape_sequence(&src); |
| 955 | } else { |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 956 | *dst++ = *src; |
Eric Andersen | 8c2d3f4 | 2000-11-30 00:03:57 +0000 | [diff] [blame] | 957 | src++; |
| 958 | } |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 959 | } |
| 960 | *dst = '\0'; |
| 961 | } else if (!rc) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 962 | argv_alloced += (prog->glob_result.gl_pathc - i); |
| 963 | prog->argv = xrealloc(prog->argv, argv_alloced * sizeof(*prog->argv)); |
| 964 | memcpy(prog->argv + (argc_l - 1), prog->glob_result.gl_pathv + i, |
| 965 | sizeof(*(prog->argv)) * (prog->glob_result.gl_pathc - i)); |
| 966 | argc_l += (prog->glob_result.gl_pathc - i - 1); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 967 | } |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 968 | }else{ |
| 969 | src = dst = prog->argv[argc_l - 1]; |
| 970 | while (*src) { |
Eric Andersen | 8c2d3f4 | 2000-11-30 00:03:57 +0000 | [diff] [blame] | 971 | if (*src == '\\') { |
| 972 | src++; |
| 973 | *dst++ = process_escape_sequence(&src); |
| 974 | } else { |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 975 | *dst++ = *src; |
Eric Andersen | 8c2d3f4 | 2000-11-30 00:03:57 +0000 | [diff] [blame] | 976 | src++; |
| 977 | } |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 978 | } |
| 979 | *dst = '\0'; |
Eric Andersen | 8c2d3f4 | 2000-11-30 00:03:57 +0000 | [diff] [blame] | 980 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 981 | prog->glob_result.gl_pathc=0; |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 982 | if (flags==0) |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 983 | prog->glob_result.gl_pathv=NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 984 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 985 | *argv_alloced_ptr = argv_alloced; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 986 | *argcPtr = argc_l; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 987 | } |
| 988 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 989 | /* Return cmd->num_progs as 0 if no command is present (e.g. an empty |
| 990 | line). If a valid command is found, command_ptr is set to point to |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 991 | the beginning of the next command (if the original command had more |
| 992 | then one job associated with it) or NULL if no more commands are |
| 993 | present. */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 994 | static int parse_command(char **command_ptr, struct job *job, int *inbg) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 995 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 996 | char *command; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 997 | char *return_command = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 998 | char *src, *buf, *chptr; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 999 | int argc_l = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1000 | int done = 0; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1001 | int argv_alloced; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1002 | int i; |
| 1003 | char quote = '\0'; |
| 1004 | int count; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1005 | struct child_prog *prog; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1006 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1007 | /* skip leading white space */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1008 | while (**command_ptr && isspace(**command_ptr)) |
| 1009 | (*command_ptr)++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1010 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1011 | /* this handles empty lines or leading '#' characters */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1012 | if (!**command_ptr || (**command_ptr == '#')) { |
| 1013 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1014 | return 0; |
| 1015 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1016 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1017 | *inbg = 0; |
| 1018 | job->num_progs = 1; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1019 | job->progs = xmalloc(sizeof(*job->progs)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1020 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1021 | /* We set the argv elements to point inside of this string. The |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1022 | memory is freed by free_job(). Allocate twice the original |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1023 | length in case we need to quote every single character. |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1024 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1025 | Getting clean memory relieves us of the task of NULL |
| 1026 | terminating things and makes the rest of this look a bit |
| 1027 | cleaner (though it is, admittedly, a tad less efficient) */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1028 | job->cmdbuf = command = xcalloc(2*strlen(*command_ptr) + 1, sizeof(char)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1029 | job->text = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1030 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1031 | prog = job->progs; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1032 | prog->num_redirects = 0; |
| 1033 | prog->redirects = NULL; |
| 1034 | prog->free_glob = 0; |
| 1035 | prog->is_stopped = 0; |
| 1036 | prog->family = job; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1037 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1038 | argv_alloced = 5; |
| 1039 | prog->argv = xmalloc(sizeof(*prog->argv) * argv_alloced); |
| 1040 | prog->argv[0] = job->cmdbuf; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1041 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1042 | buf = command; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1043 | src = *command_ptr; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1044 | while (*src && !done) { |
| 1045 | if (quote == *src) { |
| 1046 | quote = '\0'; |
| 1047 | } else if (quote) { |
| 1048 | if (*src == '\\') { |
| 1049 | src++; |
| 1050 | if (!*src) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1051 | error_msg("character expected after \\\n"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1052 | free_job(job); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1053 | return 1; |
| 1054 | } |
| 1055 | |
| 1056 | /* in shell, "\'" should yield \' */ |
Eric Andersen | b2356f6 | 2000-12-11 19:14:40 +0000 | [diff] [blame] | 1057 | if (*src != quote) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1058 | *buf++ = '\\'; |
Eric Andersen | b2356f6 | 2000-12-11 19:14:40 +0000 | [diff] [blame] | 1059 | *buf++ = '\\'; |
| 1060 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1061 | } else if (*src == '*' || *src == '?' || *src == '[' || |
| 1062 | *src == ']') *buf++ = '\\'; |
| 1063 | *buf++ = *src; |
| 1064 | } else if (isspace(*src)) { |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1065 | if (*prog->argv[argc_l]) { |
| 1066 | buf++, argc_l++; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1067 | /* +1 here leaves room for the NULL which ends argv */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1068 | if ((argc_l + 1) == argv_alloced) { |
| 1069 | argv_alloced += 5; |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1070 | prog->argv = xrealloc(prog->argv, |
| 1071 | sizeof(*prog->argv) * |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1072 | argv_alloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1073 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1074 | expand_argument(prog, &argc_l, &argv_alloced); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1075 | prog->argv[argc_l] = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1076 | } |
| 1077 | } else |
| 1078 | switch (*src) { |
| 1079 | case '"': |
| 1080 | case '\'': |
| 1081 | quote = *src; |
| 1082 | break; |
| 1083 | |
| 1084 | case '#': /* comment */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1085 | if (*(src-1)== '$') |
| 1086 | *buf++ = *src; |
| 1087 | else |
| 1088 | done = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1089 | break; |
| 1090 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1091 | case '>': /* redirects */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1092 | case '<': |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1093 | i = prog->num_redirects++; |
| 1094 | prog->redirects = xrealloc(prog->redirects, |
| 1095 | sizeof(*prog->redirects) * |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1096 | (i + 1)); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1097 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1098 | prog->redirects[i].fd = -1; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1099 | if (buf != prog->argv[argc_l]) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1100 | /* the stuff before this character may be the file number |
| 1101 | being redirected */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1102 | prog->redirects[i].fd = |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1103 | strtol(prog->argv[argc_l], &chptr, 10); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1104 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1105 | if (*chptr && *prog->argv[argc_l]) { |
| 1106 | buf++, argc_l++; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1107 | expand_argument(prog, &argc_l, &argv_alloced); |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1108 | prog->argv[argc_l] = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1109 | } |
| 1110 | } |
| 1111 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1112 | if (prog->redirects[i].fd == -1) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1113 | if (*src == '>') |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1114 | prog->redirects[i].fd = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1115 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1116 | prog->redirects[i].fd = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1117 | } |
| 1118 | |
| 1119 | if (*src++ == '>') { |
| 1120 | if (*src == '>') |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1121 | prog->redirects[i].type = |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1122 | REDIRECT_APPEND, src++; |
| 1123 | else |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1124 | prog->redirects[i].type = REDIRECT_OVERWRITE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1125 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1126 | prog->redirects[i].type = REDIRECT_INPUT; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | /* This isn't POSIX sh compliant. Oh well. */ |
| 1130 | chptr = src; |
| 1131 | while (isspace(*chptr)) |
| 1132 | chptr++; |
| 1133 | |
| 1134 | if (!*chptr) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1135 | error_msg("file name expected after %c\n", *src); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1136 | free_job(job); |
| 1137 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1138 | return 1; |
| 1139 | } |
| 1140 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1141 | prog->redirects[i].filename = buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1142 | while (*chptr && !isspace(*chptr)) |
| 1143 | *buf++ = *chptr++; |
| 1144 | |
| 1145 | src = chptr - 1; /* we src++ later */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1146 | prog->argv[argc_l] = ++buf; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1147 | break; |
| 1148 | |
| 1149 | case '|': /* pipe */ |
| 1150 | /* finish this command */ |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1151 | if (*prog->argv[argc_l]) |
| 1152 | argc_l++; |
| 1153 | if (!argc_l) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1154 | error_msg("empty command in pipe\n"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1155 | free_job(job); |
| 1156 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1157 | return 1; |
| 1158 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1159 | prog->argv[argc_l] = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1160 | |
| 1161 | /* and start the next */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1162 | job->num_progs++; |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1163 | job->progs = xrealloc(job->progs, |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1164 | sizeof(*job->progs) * job->num_progs); |
| 1165 | prog = job->progs + (job->num_progs - 1); |
| 1166 | prog->num_redirects = 0; |
| 1167 | prog->redirects = NULL; |
| 1168 | prog->free_glob = 0; |
| 1169 | prog->is_stopped = 0; |
| 1170 | prog->family = job; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1171 | argc_l = 0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1172 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1173 | argv_alloced = 5; |
| 1174 | prog->argv = xmalloc(sizeof(*prog->argv) * argv_alloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1175 | prog->argv[0] = ++buf; |
| 1176 | |
| 1177 | src++; |
| 1178 | while (*src && isspace(*src)) |
| 1179 | src++; |
| 1180 | |
| 1181 | if (!*src) { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1182 | error_msg("empty command in pipe\n"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1183 | free_job(job); |
| 1184 | job->num_progs=0; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1185 | return 1; |
| 1186 | } |
| 1187 | src--; /* we'll ++ it at the end of the loop */ |
| 1188 | |
| 1189 | break; |
| 1190 | |
| 1191 | case '&': /* background */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1192 | *inbg = 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1193 | case ';': /* multiple commands */ |
| 1194 | done = 1; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1195 | return_command = *command_ptr + (src - *command_ptr) + 1; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1196 | break; |
| 1197 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1198 | #ifdef BB_FEATURE_SH_BACKTICKS |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1199 | case '`': |
| 1200 | /* Exec a backtick-ed command */ |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1201 | /* Besides any previous brokenness, I have not |
| 1202 | * updated backtick handling for close_me support. |
| 1203 | * I don't know if it needs it or not. -- LRD */ |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1204 | { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1205 | char* charptr1=NULL, *charptr2; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1206 | char* ptr=NULL; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1207 | struct job *newjob; |
| 1208 | struct jobset njob_list = { NULL, NULL }; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1209 | int pipefd[2]; |
| 1210 | int size; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1211 | |
| 1212 | ptr=strchr(++src, '`'); |
| 1213 | if (ptr==NULL) { |
| 1214 | fprintf(stderr, "Unmatched '`' in command\n"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1215 | free_job(job); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1216 | return 1; |
| 1217 | } |
| 1218 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1219 | /* Make some space to hold just the backticked command */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1220 | charptr1 = charptr2 = xmalloc(1+ptr-src); |
Matt Kraai | 0b2da46 | 2000-09-19 06:46:44 +0000 | [diff] [blame] | 1221 | memcpy(charptr1, src, ptr-src); |
| 1222 | charptr1[ptr-src] = '\0'; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1223 | newjob = xmalloc(sizeof(struct job)); |
| 1224 | newjob->job_list = &njob_list; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1225 | /* Now parse and run the backticked command */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1226 | if (!parse_command(&charptr1, newjob, inbg) |
| 1227 | && newjob->num_progs) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1228 | pipe(pipefd); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1229 | run_command(newjob, 0, pipefd); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1230 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1231 | checkjobs(job->job_list); |
| 1232 | free_job(newjob); /* doesn't actually free newjob, |
| 1233 | looks like a memory leak */ |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1234 | free(charptr2); |
| 1235 | |
| 1236 | /* Make a copy of any stuff left over in the command |
| 1237 | * line after the second backtick */ |
| 1238 | charptr2 = xmalloc(strlen(ptr)+1); |
| 1239 | memcpy(charptr2, ptr+1, strlen(ptr)); |
| 1240 | |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1241 | |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1242 | /* Copy the output from the backtick-ed command into the |
| 1243 | * command line, making extra room as needed */ |
| 1244 | --src; |
| 1245 | charptr1 = xmalloc(BUFSIZ); |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1246 | while ( (size=full_read(pipefd[0], charptr1, BUFSIZ-1)) >0) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1247 | int newsize=src - *command_ptr + size + 1 + strlen(charptr2); |
| 1248 | if (newsize > BUFSIZ) { |
| 1249 | *command_ptr=xrealloc(*command_ptr, newsize); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1250 | } |
| 1251 | memcpy(src, charptr1, size); |
| 1252 | src+=size; |
| 1253 | } |
| 1254 | free(charptr1); |
| 1255 | close(pipefd[0]); |
| 1256 | if (*(src-1)=='\n') |
| 1257 | --src; |
| 1258 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1259 | /* Now paste into the *command_ptr all the stuff |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1260 | * leftover after the second backtick */ |
Matt Kraai | cbbe4d6 | 2000-09-14 00:26:50 +0000 | [diff] [blame] | 1261 | memcpy(src, charptr2, strlen(charptr2)+1); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1262 | free(charptr2); |
| 1263 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1264 | /* Now recursively call parse_command to deal with the new |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1265 | * and improved version of the command line with the backtick |
| 1266 | * results expanded in place... */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1267 | { |
| 1268 | struct jobset *jl=job->job_list; |
| 1269 | free_job(job); |
| 1270 | job->job_list = jl; |
| 1271 | } |
| 1272 | return(parse_command(command_ptr, job, inbg)); |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1273 | } |
| 1274 | break; |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1275 | #endif // BB_FEATURE_SH_BACKTICKS |
Matt Kraai | 131241f | 2000-09-14 00:43:20 +0000 | [diff] [blame] | 1276 | |
| 1277 | case '\\': |
| 1278 | src++; |
| 1279 | if (!*src) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1280 | /* This is currently a little broken... */ |
| 1281 | #ifdef HANDLE_CONTINUATION_CHARS |
| 1282 | /* They fed us a continuation char, so continue reading stuff |
| 1283 | * on the next line, then tack that onto the end of the current |
| 1284 | * command */ |
| 1285 | char *command; |
| 1286 | int newsize; |
| 1287 | printf("erik: found a continue char at EOL...\n"); |
| 1288 | command = (char *) xcalloc(BUFSIZ, sizeof(char)); |
| 1289 | if (get_command(input, command)) { |
| 1290 | error_msg("character expected after \\\n"); |
| 1291 | free(command); |
| 1292 | free_job(job); |
| 1293 | return 1; |
| 1294 | } |
| 1295 | newsize = strlen(*command_ptr) + strlen(command) + 2; |
| 1296 | if (newsize > BUFSIZ) { |
| 1297 | printf("erik: doing realloc\n"); |
| 1298 | *command_ptr=xrealloc(*command_ptr, newsize); |
| 1299 | } |
| 1300 | printf("erik: A: *command_ptr='%s'\n", *command_ptr); |
| 1301 | memcpy(--src, command, strlen(command)); |
| 1302 | printf("erik: B: *command_ptr='%s'\n", *command_ptr); |
| 1303 | free(command); |
| 1304 | break; |
| 1305 | #else |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1306 | error_msg("character expected after \\\n"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1307 | free(command); |
| 1308 | free_job(job); |
Matt Kraai | 131241f | 2000-09-14 00:43:20 +0000 | [diff] [blame] | 1309 | return 1; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1310 | #endif |
Matt Kraai | 131241f | 2000-09-14 00:43:20 +0000 | [diff] [blame] | 1311 | } |
| 1312 | if (*src == '*' || *src == '[' || *src == ']' |
| 1313 | || *src == '?') *buf++ = '\\'; |
| 1314 | /* fallthrough */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1315 | default: |
| 1316 | *buf++ = *src; |
| 1317 | } |
| 1318 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1319 | src++; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1320 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1321 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1322 | if (*prog->argv[argc_l]) { |
| 1323 | argc_l++; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1324 | expand_argument(prog, &argc_l, &argv_alloced); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1325 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1326 | if (!argc_l) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1327 | free_job(job); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1328 | return 0; |
| 1329 | } |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1330 | prog->argv[argc_l] = NULL; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1331 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1332 | if (!return_command) { |
| 1333 | job->text = xmalloc(strlen(*command_ptr) + 1); |
| 1334 | strcpy(job->text, *command_ptr); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1335 | } else { |
| 1336 | /* This leaves any trailing spaces, which is a bit sloppy */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1337 | count = return_command - *command_ptr; |
Eric Andersen | ec10b9d | 2000-07-14 01:13:11 +0000 | [diff] [blame] | 1338 | job->text = xmalloc(count + 1); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1339 | strncpy(job->text, *command_ptr, count); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1340 | job->text[count] = '\0'; |
| 1341 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1342 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1343 | *command_ptr = return_command; |
Eric Andersen | 46f0beb | 2000-11-14 21:59:22 +0000 | [diff] [blame] | 1344 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1345 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1346 | } |
| 1347 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1348 | /* Run the child_prog, no matter what kind of command it uses. |
| 1349 | */ |
| 1350 | static int pseudo_exec(struct child_prog *child) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1351 | { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1352 | struct built_in_command *x; |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1353 | #ifdef BB_FEATURE_SH_STANDALONE_SHELL |
Eric Andersen | a683ee8 | 2000-11-17 18:51:45 +0000 | [diff] [blame] | 1354 | struct BB_applet search_applet, *applet; |
Erik Andersen | bcd6177 | 2000-05-13 06:33:19 +0000 | [diff] [blame] | 1355 | #endif |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1356 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1357 | /* Check if the command matches any of the non-forking builtins. |
| 1358 | * Depending on context, this might be redundant. But it's |
| 1359 | * easier to waste a few CPU cycles than it is to figure out |
| 1360 | * if this is one of those cases. |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1361 | */ |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1362 | for (x = bltins; x->cmd; x++) { |
| 1363 | if (strcmp(child->argv[0], x->cmd) == 0 ) { |
| 1364 | exit(x->function(child)); |
| 1365 | } |
| 1366 | } |
| 1367 | |
| 1368 | /* Check if the command matches any of the forking builtins. */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1369 | for (x = bltins_forking; x->cmd; x++) { |
| 1370 | if (strcmp(child->argv[0], x->cmd) == 0) { |
| 1371 | applet_name=x->cmd; |
| 1372 | exit (x->function(child)); |
| 1373 | } |
| 1374 | } |
| 1375 | #ifdef BB_FEATURE_SH_STANDALONE_SHELL |
| 1376 | /* Check if the command matches any busybox internal |
| 1377 | * commands ("applets") here. Following discussions from |
| 1378 | * November 2000 on busybox@opensource.lineo.com, don't use |
| 1379 | * get_last_path_component(). This way explicit (with |
| 1380 | * slashes) filenames will never be interpreted as an |
| 1381 | * applet, just like with builtins. This way the user can |
| 1382 | * override an applet with an explicit filename reference. |
| 1383 | * The only downside to this change is that an explicit |
| 1384 | * /bin/foo invocation will fork and exec /bin/foo, even if |
| 1385 | * /bin/foo is a symlink to busybox. |
| 1386 | */ |
| 1387 | search_applet.name = child->argv[0]; |
| 1388 | |
| 1389 | #ifdef BB_FEATURE_SH_APPLETS_ALWAYS_WIN |
| 1390 | /* If you enable BB_FEATURE_SH_APPLETS_ALWAYS_WIN, then |
| 1391 | * if you run /bin/cat, it will use BusyBox cat even if |
| 1392 | * /bin/cat exists on the filesystem and is _not_ busybox. |
| 1393 | * Some systems want this, others do not. Choose wisely. :-) |
| 1394 | */ |
| 1395 | search_applet.name = get_last_path_component(search_applet.name); |
| 1396 | #endif |
| 1397 | |
| 1398 | /* Do a binary search to find the applet entry given the name. */ |
| 1399 | applet = bsearch(&search_applet, applets, NUM_APPLETS, |
| 1400 | sizeof(struct BB_applet), applet_name_compare); |
| 1401 | if (applet != NULL) { |
| 1402 | int argc_l; |
| 1403 | char** argv=child->argv; |
| 1404 | for(argc_l=0;*argv!=NULL; argv++, argc_l++); |
| 1405 | applet_name=applet->name; |
| 1406 | optind = 1; |
| 1407 | exit((*(applet->main)) (argc_l, child->argv)); |
| 1408 | } |
| 1409 | #endif |
| 1410 | |
| 1411 | execvp(child->argv[0], child->argv); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1412 | perror_msg_and_die("%s", child->argv[0]); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1413 | } |
| 1414 | |
| 1415 | static void insert_job(struct job *newjob, int inbg) |
| 1416 | { |
| 1417 | struct job *thejob; |
| 1418 | struct jobset *job_list=newjob->job_list; |
| 1419 | |
| 1420 | /* find the ID for thejob to use */ |
| 1421 | newjob->jobid = 1; |
| 1422 | for (thejob = job_list->head; thejob; thejob = thejob->next) |
| 1423 | if (thejob->jobid >= newjob->jobid) |
| 1424 | newjob->jobid = thejob->jobid + 1; |
| 1425 | |
| 1426 | /* add thejob to the list of running jobs */ |
| 1427 | if (!job_list->head) { |
| 1428 | thejob = job_list->head = xmalloc(sizeof(*thejob)); |
| 1429 | } else { |
| 1430 | for (thejob = job_list->head; thejob->next; thejob = thejob->next) /* nothing */; |
| 1431 | thejob->next = xmalloc(sizeof(*thejob)); |
| 1432 | thejob = thejob->next; |
| 1433 | } |
| 1434 | |
| 1435 | *thejob = *newjob; /* physically copy the struct job */ |
| 1436 | thejob->next = NULL; |
| 1437 | thejob->running_progs = thejob->num_progs; |
| 1438 | thejob->stopped_progs = 0; |
| 1439 | |
| 1440 | if (inbg) { |
| 1441 | /* we don't wait for background thejobs to return -- append it |
| 1442 | to the list of backgrounded thejobs and leave it alone */ |
| 1443 | printf("[%d] %d\n", thejob->jobid, |
| 1444 | newjob->progs[newjob->num_progs - 1].pid); |
| 1445 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 1446 | last_bg_pid=newjob->progs[newjob->num_progs - 1].pid; |
| 1447 | #endif |
| 1448 | } else { |
| 1449 | newjob->job_list->fg = thejob; |
| 1450 | |
| 1451 | /* move the new process group into the foreground */ |
| 1452 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 1453 | if (tcsetpgrp(0, newjob->pgrp) && errno != ENOTTY) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 1454 | perror_msg("tcsetpgrp"); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | static int run_command(struct job *newjob, int inbg, int outpipe[2]) |
| 1459 | { |
| 1460 | /* struct job *thejob; */ |
| 1461 | int i; |
| 1462 | int nextin, nextout; |
| 1463 | int pipefds[2]; /* pipefd[0] is for reading */ |
| 1464 | struct built_in_command *x; |
| 1465 | struct child_prog *child; |
| 1466 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1467 | nextin = 0, nextout = 1; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1468 | for (i = 0; i < newjob->num_progs; i++) { |
| 1469 | child = & (newjob->progs[i]); |
| 1470 | |
| 1471 | if ((i + 1) < newjob->num_progs) { |
| 1472 | if (pipe(pipefds)<0) perror_msg_and_die("pipe"); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1473 | nextout = pipefds[1]; |
| 1474 | } else { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1475 | if (outpipe[1]!=-1) { |
| 1476 | nextout = outpipe[1]; |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1477 | } else { |
| 1478 | nextout = 1; |
| 1479 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1480 | } |
| 1481 | |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1482 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1483 | if (show_x_trace==TRUE) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1484 | int j; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1485 | fputc('+', stderr); |
| 1486 | for (j = 0; child->argv[j]; j++) { |
| 1487 | fputc(' ', stderr); |
| 1488 | fputs(child->argv[j], stderr); |
| 1489 | } |
| 1490 | fputc('\n', stderr); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1491 | } |
| 1492 | #endif |
| 1493 | |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1494 | /* Check if the command matches any non-forking builtins, |
| 1495 | * but only if this is a simple command. |
| 1496 | * Non-forking builtins within pipes have to fork anyway, |
| 1497 | * and are handled in pseudo_exec. "echo foo | read bar" |
| 1498 | * is doomed to failure, and doesn't work on bash, either. |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1499 | */ |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1500 | if (newjob->num_progs == 1) { |
| 1501 | for (x = bltins; x->cmd; x++) { |
| 1502 | if (strcmp(child->argv[0], x->cmd) == 0 ) { |
| 1503 | int squirrel[] = {-1, -1, -1}; |
| 1504 | int rcode; |
| 1505 | setup_redirects(child, squirrel); |
| 1506 | rcode = x->function(child); |
| 1507 | restore_redirects(squirrel); |
| 1508 | return rcode; |
| 1509 | } |
Erik Andersen | 330fd2b | 2000-05-19 05:35:19 +0000 | [diff] [blame] | 1510 | } |
| 1511 | } |
| 1512 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1513 | if (!(child->pid = fork())) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1514 | signal(SIGTTOU, SIG_DFL); |
| 1515 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1516 | close_all(); |
| 1517 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1518 | if (outpipe[1]!=-1) { |
| 1519 | close(outpipe[0]); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1520 | } |
| 1521 | if (nextin != 0) { |
| 1522 | dup2(nextin, 0); |
| 1523 | close(nextin); |
| 1524 | } |
| 1525 | |
| 1526 | if (nextout != 1) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1527 | dup2(nextout, 1); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1528 | dup2(nextout, 2); /* Really? */ |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1529 | close(nextout); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1530 | close(pipefds[0]); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1531 | } |
| 1532 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1533 | /* explicit redirects override pipes */ |
Eric Andersen | e9f07fb | 2000-12-21 18:31:36 +0000 | [diff] [blame] | 1534 | setup_redirects(child,NULL); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1535 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1536 | pseudo_exec(child); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1537 | } |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1538 | if (outpipe[1]!=-1) { |
| 1539 | close(outpipe[1]); |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1540 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1541 | |
| 1542 | /* put our child in the process group whose leader is the |
| 1543 | first process in this pipe */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1544 | setpgid(child->pid, newjob->progs[0].pid); |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1545 | if (nextin != 0) |
| 1546 | close(nextin); |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1547 | if (nextout != 1) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1548 | close(nextout); |
| 1549 | |
| 1550 | /* If there isn't another process, nextin is garbage |
| 1551 | but it doesn't matter */ |
| 1552 | nextin = pipefds[0]; |
| 1553 | } |
| 1554 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1555 | newjob->pgrp = newjob->progs[0].pid; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1556 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1557 | insert_job(newjob, inbg); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1558 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1559 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1560 | } |
| 1561 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1562 | static int busy_loop(FILE * input) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1563 | { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1564 | char *command; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1565 | char *next_command = NULL; |
| 1566 | struct job newjob; |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1567 | pid_t parent_pgrp; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1568 | int i; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1569 | int inbg; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1570 | int status; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1571 | newjob.job_list = &job_list; |
| 1572 | newjob.job_context = DEFAULT_CONTEXT; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1573 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1574 | /* save current owner of TTY so we can restore it on exit */ |
| 1575 | parent_pgrp = tcgetpgrp(0); |
| 1576 | |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1577 | command = (char *) xcalloc(BUFSIZ, sizeof(char)); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1578 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1579 | /* don't pay any attention to this signal; it just confuses |
| 1580 | things and isn't really meant for shells anyway */ |
| 1581 | signal(SIGTTOU, SIG_IGN); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1582 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1583 | while (1) { |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1584 | if (!job_list.fg) { |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1585 | /* no job is in the foreground */ |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1586 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1587 | /* see if any background processes have exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1588 | checkjobs(&job_list); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1589 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1590 | if (!next_command) { |
| 1591 | if (get_command(input, command)) |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1592 | break; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1593 | next_command = command; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1594 | } |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1595 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1596 | if (!parse_command(&next_command, &newjob, &inbg) && |
| 1597 | newjob.num_progs) { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1598 | int pipefds[2] = {-1,-1}; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1599 | debug_printf( "job=%p being fed to run_command by busy_loop()'\n", &newjob); |
| 1600 | run_command(&newjob, inbg, pipefds); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1601 | } |
| 1602 | else { |
Eric Andersen | a1d187a | 2000-07-17 19:14:41 +0000 | [diff] [blame] | 1603 | free(command); |
Matt Kraai | b890752 | 2000-09-13 02:08:21 +0000 | [diff] [blame] | 1604 | command = (char *) xcalloc(BUFSIZ, sizeof(char)); |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1605 | next_command = NULL; |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1606 | } |
| 1607 | } else { |
| 1608 | /* a job is running in the foreground; wait for it */ |
| 1609 | i = 0; |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1610 | while (!job_list.fg->progs[i].pid || |
| 1611 | job_list.fg->progs[i].is_stopped == 1) i++; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1612 | |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1613 | if (waitpid(job_list.fg->progs[i].pid, &status, WUNTRACED)<0) |
| 1614 | perror_msg_and_die("waitpid(%d)",job_list.fg->progs[i].pid); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1615 | |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1616 | if (WIFEXITED(status) || WIFSIGNALED(status)) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1617 | /* the child exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1618 | job_list.fg->running_progs--; |
| 1619 | job_list.fg->progs[i].pid = 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1620 | |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1621 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1622 | last_return_code=WEXITSTATUS(status); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1623 | #endif |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1624 | debug_printf("'%s' exited -- return code %d\n", |
| 1625 | job_list.fg->text, last_return_code); |
| 1626 | if (!job_list.fg->running_progs) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1627 | /* child exited */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1628 | remove_job(&job_list, job_list.fg); |
| 1629 | job_list.fg = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1630 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1631 | } else { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1632 | /* the child was stopped */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1633 | job_list.fg->stopped_progs++; |
| 1634 | job_list.fg->progs[i].is_stopped = 1; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1635 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1636 | if (job_list.fg->stopped_progs == job_list.fg->running_progs) { |
| 1637 | printf("\n" JOB_STATUS_FORMAT, job_list.fg->jobid, |
| 1638 | "Stopped", job_list.fg->text); |
| 1639 | job_list.fg = NULL; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1640 | } |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1641 | } |
| 1642 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1643 | if (!job_list.fg) { |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1644 | /* move the shell to the foreground */ |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1645 | /* suppress messages when run from /linuxrc mag@sysgo.de */ |
| 1646 | if (tcsetpgrp(0, getpid()) && errno != ENOTTY) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 1647 | perror_msg("tcsetpgrp"); |
Erik Andersen | d75af99 | 2000-03-16 08:09:09 +0000 | [diff] [blame] | 1648 | } |
| 1649 | } |
| 1650 | } |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1651 | free(command); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1652 | |
Eric Andersen | 1c314ad | 2000-06-28 16:56:25 +0000 | [diff] [blame] | 1653 | /* return controlling TTY back to parent process group before exiting */ |
| 1654 | if (tcsetpgrp(0, parent_pgrp)) |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 1655 | perror_msg("tcsetpgrp"); |
Eric Andersen | b54833c | 2000-07-03 23:56:26 +0000 | [diff] [blame] | 1656 | |
| 1657 | /* return exit status if called with "-c" */ |
| 1658 | if (input == NULL && WIFEXITED(status)) |
| 1659 | return WEXITSTATUS(status); |
| 1660 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1661 | return 0; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1662 | } |
| 1663 | |
| 1664 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1665 | #ifdef BB_FEATURE_CLEAN_UP |
| 1666 | void free_memory(void) |
| 1667 | { |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1668 | if (cwd) |
| 1669 | free(cwd); |
| 1670 | if (local_pending_command) |
| 1671 | free(local_pending_command); |
| 1672 | |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1673 | if (job_list.fg && !job_list.fg->running_progs) { |
| 1674 | remove_job(&job_list, job_list.fg); |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1675 | } |
| 1676 | } |
| 1677 | #endif |
| 1678 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1679 | |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1680 | int shell_main(int argc_l, char **argv_l) |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1681 | { |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1682 | int opt, interactive=FALSE; |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1683 | FILE *input = stdin; |
Eric Andersen | 6a99aaf | 2000-07-27 00:15:20 +0000 | [diff] [blame] | 1684 | argc = argc_l; |
| 1685 | argv = argv_l; |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1686 | |
Eric Andersen | b0970d4 | 2001-01-05 19:34:52 +0000 | [diff] [blame] | 1687 | shell_context = 0; |
| 1688 | cwd=NULL; |
| 1689 | #ifdef BB_FEATURE_STANDALONE_SHELL |
| 1690 | /* These variables need re-initializing when recursing */ |
| 1691 | local_pending_command = NULL; |
| 1692 | job_list.head = NULL; |
| 1693 | job_list.fg = NULL; |
| 1694 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
| 1695 | last_bg_pid=-1; |
| 1696 | last_return_code=-1; |
| 1697 | show_x_trace=FALSE; |
| 1698 | #endif |
| 1699 | #endif |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1700 | |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 1701 | if (argv[0] && argv[0][0] == '-') { |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1702 | FILE *prof_input; |
| 1703 | prof_input = fopen("/etc/profile", "r"); |
| 1704 | if (!prof_input) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1705 | printf( "Couldn't open file '/etc/profile'\n"); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1706 | } else { |
| 1707 | int tmp_fd = fileno(prof_input); |
| 1708 | mark_open(tmp_fd); |
| 1709 | /* Now run the file */ |
| 1710 | busy_loop(prof_input); |
| 1711 | fclose(prof_input); |
| 1712 | mark_closed(tmp_fd); |
| 1713 | } |
Eric Andersen | b558e76 | 2000-11-30 22:43:16 +0000 | [diff] [blame] | 1714 | } |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1715 | |
Eric Andersen | f21aa84 | 2000-12-08 20:50:30 +0000 | [diff] [blame] | 1716 | while ((opt = getopt(argc_l, argv_l, "cxi")) > 0) { |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1717 | switch (opt) { |
| 1718 | case 'c': |
| 1719 | input = NULL; |
Matt Kraai | 6085c72 | 2000-09-06 01:46:18 +0000 | [diff] [blame] | 1720 | if (local_pending_command != 0) |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 1721 | error_msg_and_die("multiple -c arguments\n"); |
Matt Kraai | 6085c72 | 2000-09-06 01:46:18 +0000 | [diff] [blame] | 1722 | local_pending_command = xstrdup(argv[optind]); |
| 1723 | optind++; |
| 1724 | argv = argv+optind; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1725 | break; |
Eric Andersen | 1428c4f | 2000-07-28 15:19:30 +0000 | [diff] [blame] | 1726 | #ifdef BB_FEATURE_SH_ENVIRONMENT |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1727 | case 'x': |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1728 | show_x_trace = TRUE; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1729 | break; |
Eric Andersen | 1428c4f | 2000-07-28 15:19:30 +0000 | [diff] [blame] | 1730 | #endif |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1731 | case 'i': |
| 1732 | interactive = TRUE; |
| 1733 | break; |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1734 | default: |
| 1735 | usage(shell_usage); |
| 1736 | } |
| 1737 | } |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1738 | /* A shell is interactive if the `-i' flag was given, or if all of |
| 1739 | * the following conditions are met: |
| 1740 | * no -c command |
| 1741 | * no arguments remaining or the -s flag given |
| 1742 | * standard input is a terminal |
| 1743 | * standard output is a terminal |
| 1744 | * Refer to Posix.2, the description of the `sh' utility. */ |
Eric Andersen | 8634977 | 2000-12-18 20:25:50 +0000 | [diff] [blame] | 1745 | if (argv[optind]==NULL && input==stdin && |
| 1746 | isatty(fileno(stdin)) && isatty(fileno(stdout))) { |
| 1747 | interactive=TRUE; |
| 1748 | } |
| 1749 | if (interactive==TRUE) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1750 | //printf( "optind=%d argv[optind]='%s'\n", optind, argv[optind]); |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1751 | /* Looks like they want an interactive shell */ |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1752 | printf( "\n\nBusyBox v%s (%s) Built-in shell (lash)\n", BB_VER, BB_BT); |
| 1753 | printf( "Enter 'help' for a list of built-in commands.\n\n"); |
Eric Andersen | 6a4c33c | 2000-07-28 17:08:36 +0000 | [diff] [blame] | 1754 | } else if (local_pending_command==NULL) { |
Eric Andersen | 6f65a3a | 2001-01-20 01:10:07 +0000 | [diff] [blame] | 1755 | //printf( "optind=%d argv[optind]='%s'\n", optind, argv[optind]); |
Matt Kraai | bbaef66 | 2000-09-27 02:43:35 +0000 | [diff] [blame] | 1756 | input = xfopen(argv[optind], "r"); |
Eric Andersen | 8ea28be | 2001-01-05 20:58:22 +0000 | [diff] [blame] | 1757 | mark_open(fileno(input)); /* be lazy, never mark this closed */ |
Eric Andersen | 501c88b | 2000-07-28 15:14:45 +0000 | [diff] [blame] | 1758 | } |
| 1759 | |
Eric Andersen | 6efc48c | 2000-07-18 08:16:39 +0000 | [diff] [blame] | 1760 | /* initialize the cwd -- this is never freed...*/ |
| 1761 | cwd=(char*)xmalloc(sizeof(char)*MAX_LINE+1); |
| 1762 | getcwd(cwd, sizeof(char)*MAX_LINE); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1763 | |
Eric Andersen | fad9c11 | 2000-07-25 18:06:52 +0000 | [diff] [blame] | 1764 | #ifdef BB_FEATURE_CLEAN_UP |
| 1765 | atexit(free_memory); |
| 1766 | #endif |
| 1767 | |
Erik Andersen | 161220c | 2000-03-16 08:12:48 +0000 | [diff] [blame] | 1768 | return (busy_loop(input)); |
Erik Andersen | 3522eb1 | 2000-03-12 23:49:18 +0000 | [diff] [blame] | 1769 | } |