Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 2 | /* |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 3 | * sed.c - very minimalist version of sed |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 4 | * |
Eric Andersen | bdfd0d7 | 2001-10-24 05:00:29 +0000 | [diff] [blame] | 5 | * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley |
| 6 | * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org> |
Matt Kraai | 5ed78ad | 2002-01-03 21:12:34 +0000 | [diff] [blame] | 7 | * Copyright (C) 2002 Matt Kraai |
Denis Vlasenko | 0beaff8 | 2007-09-21 13:16:32 +0000 | [diff] [blame] | 8 | * Copyright (C) 2003 by Glenn McGrath |
Rob Landley | 25d8239 | 2004-04-01 09:23:30 +0000 | [diff] [blame] | 9 | * Copyright (C) 2003,2004 by Rob Landley <rob@landley.net> |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 10 | * |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 11 | * MAINTAINER: Rob Landley <rob@landley.net> |
Bernhard Reutner-Fischer | b7f3973 | 2006-03-01 20:14:16 +0000 | [diff] [blame] | 12 | * |
Rob Landley | e9a7a62 | 2006-09-22 02:52:41 +0000 | [diff] [blame] | 13 | * Licensed under GPL version 2, see file LICENSE in this tarball for details. |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 14 | */ |
| 15 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 16 | /* Code overview. |
| 17 | |
| 18 | Files are laid out to avoid unnecessary function declarations. So for |
| 19 | example, every function add_cmd calls occurs before add_cmd in this file. |
| 20 | |
| 21 | add_cmd() is called on each line of sed command text (from a file or from |
| 22 | the command line). It calls get_address() and parse_cmd_args(). The |
| 23 | resulting sed_cmd_t structures are appended to a linked list |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 24 | (G.sed_cmd_head/G.sed_cmd_tail). |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 25 | |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 26 | add_input_file() adds a FILE * to the list of input files. We need to |
Rob Landley | fae1dc8 | 2005-11-20 07:44:35 +0000 | [diff] [blame] | 27 | know all input sources ahead of time to find the last line for the $ match. |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 28 | |
| 29 | process_files() does actual sedding, reading data lines from each input FILE * |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 30 | (which could be stdin) and applying the sed command list (sed_cmd_head) to |
| 31 | each of the resulting lines. |
| 32 | |
| 33 | sed_main() is where external code calls into this, with a command line. |
| 34 | */ |
| 35 | |
| 36 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 37 | /* |
| 38 | Supported features and commands in this version of sed: |
| 39 | |
| 40 | - comments ('#') |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 41 | - address matching: num|/matchstr/[,num|/matchstr/|$]command |
| 42 | - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags) |
| 43 | - edit commands: (a)ppend, (i)nsert, (c)hange |
Mark Whitley | 1f3b9f2 | 2001-05-11 22:27:13 +0000 | [diff] [blame] | 44 | - file commands: (r)ead |
Rob Landley | c63fe91 | 2005-10-30 10:08:13 +0000 | [diff] [blame] | 45 | - backreferences in substitution expressions (\0, \1, \2...\9) |
Glenn L McGrath | f50ce31 | 2003-03-09 15:12:24 +0000 | [diff] [blame] | 46 | - grouped commands: {cmd1;cmd2} |
Glenn L McGrath | bd9b32b | 2003-04-09 01:43:54 +0000 | [diff] [blame] | 47 | - transliteration (y/source-chars/dest-chars/) |
| 48 | - pattern space hold space storing / swapping (g, h, x) |
Rob Landley | 93850a5 | 2005-05-18 06:34:37 +0000 | [diff] [blame] | 49 | - labels / branching (: label, b, t, T) |
Glenn L McGrath | f50ce31 | 2003-03-09 15:12:24 +0000 | [diff] [blame] | 50 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 51 | (Note: Specifying an address (range) to match is *optional*; commands |
| 52 | default to the whole pattern space if no specific address match was |
| 53 | requested.) |
| 54 | |
Glenn L McGrath | 2570b43 | 2003-09-16 05:25:43 +0000 | [diff] [blame] | 55 | Todo: |
Glenn L McGrath | 2570b43 | 2003-09-16 05:25:43 +0000 | [diff] [blame] | 56 | - Create a wrapper around regex to make libc's regex conform with sed |
Glenn L McGrath | bd9b32b | 2003-04-09 01:43:54 +0000 | [diff] [blame] | 57 | |
Glenn L McGrath | d5eadea | 2003-03-09 02:39:29 +0000 | [diff] [blame] | 58 | Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 59 | */ |
| 60 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 61 | #include "libbb.h" |
"Vladimir N. Oleynik" | 23f62fc | 2005-09-14 16:59:11 +0000 | [diff] [blame] | 62 | #include "xregex.h" |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 63 | |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 64 | /* Each sed command turns into one of these structures. */ |
Glenn L McGrath | e7a8bc9 | 2003-03-09 10:23:57 +0000 | [diff] [blame] | 65 | typedef struct sed_cmd_s { |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 66 | /* Ordered by alignment requirements: currently 36 bytes on x86 */ |
Denis Vlasenko | 34c4e5f | 2007-01-30 22:25:16 +0000 | [diff] [blame] | 67 | struct sed_cmd_s *next; /* Next command (linked list, NULL terminated) */ |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 68 | |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 69 | /* address storage */ |
| 70 | regex_t *beg_match; /* sed -e '/match/cmd' */ |
| 71 | regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */ |
| 72 | regex_t *sub_match; /* For 's/sub_match/string/' */ |
| 73 | int beg_line; /* 'sed 1p' 0 == apply commands to all lines */ |
| 74 | int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */ |
Bernhard Reutner-Fischer | b7f3973 | 2006-03-01 20:14:16 +0000 | [diff] [blame] | 75 | |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 76 | FILE *sw_file; /* File (sw) command writes to, -1 for none. */ |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 77 | char *string; /* Data string for (saicytb) commands. */ |
Glenn L McGrath | fc4cb4d | 2003-04-12 16:10:42 +0000 | [diff] [blame] | 78 | |
Denis Vlasenko | 284d0fa | 2008-02-16 13:18:17 +0000 | [diff] [blame] | 79 | unsigned which_match; /* (s) Which match to replace (0 for all) */ |
Glenn L McGrath | fc4cb4d | 2003-04-12 16:10:42 +0000 | [diff] [blame] | 80 | |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 81 | /* Bitfields (gcc won't group them if we don't) */ |
Denis Vlasenko | 34c4e5f | 2007-01-30 22:25:16 +0000 | [diff] [blame] | 82 | unsigned invert:1; /* the '!' after the address */ |
| 83 | unsigned in_match:1; /* Next line also included in match? */ |
| 84 | unsigned sub_p:1; /* (s) print option */ |
Denis Vlasenko | 1375bc7 | 2006-12-02 20:12:12 +0000 | [diff] [blame] | 85 | |
Denis Vlasenko | 34c4e5f | 2007-01-30 22:25:16 +0000 | [diff] [blame] | 86 | char sw_last_char; /* Last line written by (sw) had no '\n' */ |
Glenn L McGrath | c18ce37 | 2003-09-13 06:57:39 +0000 | [diff] [blame] | 87 | |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 88 | /* GENERAL FIELDS */ |
| 89 | char cmd; /* The command char: abcdDgGhHilnNpPqrstwxy:={} */ |
Glenn L McGrath | e7a8bc9 | 2003-03-09 10:23:57 +0000 | [diff] [blame] | 90 | } sed_cmd_t; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 91 | |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 92 | static const char semicolon_whitespace[] ALIGN1 = "; \n\r\t\v"; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 93 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 94 | struct globals { |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 95 | /* options */ |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 96 | int be_quiet, regex_type; |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 97 | FILE *nonstdout; |
| 98 | char *outname, *hold_space; |
Glenn L McGrath | bd9b32b | 2003-04-09 01:43:54 +0000 | [diff] [blame] | 99 | |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 100 | /* List of input files */ |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 101 | int input_file_count, current_input_file; |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 102 | FILE **input_file_list; |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 103 | |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 104 | regmatch_t regmatch[10]; |
| 105 | regex_t *previous_regex_ptr; |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 106 | |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 107 | /* linked list of sed commands */ |
| 108 | sed_cmd_t sed_cmd_head, *sed_cmd_tail; |
| 109 | |
| 110 | /* Linked list of append lines */ |
| 111 | llist_t *append_head; |
| 112 | |
| 113 | char *add_cmd_line; |
| 114 | |
| 115 | struct pipeline { |
| 116 | char *buf; /* Space to hold string */ |
| 117 | int idx; /* Space used */ |
| 118 | int len; /* Space allocated */ |
| 119 | } pipeline; |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 120 | }; |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 121 | #define G (*(struct globals*)&bb_common_bufsiz1) |
Denis Vlasenko | 74324c8 | 2007-06-04 10:16:52 +0000 | [diff] [blame] | 122 | void BUG_sed_globals_too_big(void); |
| 123 | #define INIT_G() do { \ |
| 124 | if (sizeof(struct globals) > COMMON_BUFSIZE) \ |
| 125 | BUG_sed_globals_too_big(); \ |
| 126 | G.sed_cmd_tail = &G.sed_cmd_head; \ |
| 127 | } while (0) |
| 128 | |
Glenn L McGrath | bd9b32b | 2003-04-09 01:43:54 +0000 | [diff] [blame] | 129 | |
Bernhard Reutner-Fischer | b7f3973 | 2006-03-01 20:14:16 +0000 | [diff] [blame] | 130 | #if ENABLE_FEATURE_CLEAN_UP |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 131 | static void sed_free_and_close_stuff(void) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 132 | { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 133 | sed_cmd_t *sed_cmd = G.sed_cmd_head.next; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 134 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 135 | llist_free(G.append_head, free); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 136 | |
Glenn L McGrath | 56c633c | 2003-03-28 04:23:23 +0000 | [diff] [blame] | 137 | while (sed_cmd) { |
Glenn L McGrath | bd9b32b | 2003-04-09 01:43:54 +0000 | [diff] [blame] | 138 | sed_cmd_t *sed_cmd_next = sed_cmd->next; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 139 | |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 140 | if (sed_cmd->sw_file) |
| 141 | xprint_and_close_file(sed_cmd->sw_file); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 142 | |
Glenn L McGrath | 56c633c | 2003-03-28 04:23:23 +0000 | [diff] [blame] | 143 | if (sed_cmd->beg_match) { |
| 144 | regfree(sed_cmd->beg_match); |
| 145 | free(sed_cmd->beg_match); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 146 | } |
Glenn L McGrath | 56c633c | 2003-03-28 04:23:23 +0000 | [diff] [blame] | 147 | if (sed_cmd->end_match) { |
| 148 | regfree(sed_cmd->end_match); |
| 149 | free(sed_cmd->end_match); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 150 | } |
Glenn L McGrath | 56c633c | 2003-03-28 04:23:23 +0000 | [diff] [blame] | 151 | if (sed_cmd->sub_match) { |
| 152 | regfree(sed_cmd->sub_match); |
| 153 | free(sed_cmd->sub_match); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 154 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 155 | free(sed_cmd->string); |
Glenn L McGrath | 56c633c | 2003-03-28 04:23:23 +0000 | [diff] [blame] | 156 | free(sed_cmd); |
| 157 | sed_cmd = sed_cmd_next; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 158 | } |
Rob Landley | ce4f0e9 | 2004-10-30 06:54:19 +0000 | [diff] [blame] | 159 | |
Denis Vlasenko | 6081868 | 2007-09-28 22:07:23 +0000 | [diff] [blame] | 160 | free(G.hold_space); |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 161 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 162 | while (G.current_input_file < G.input_file_count) |
| 163 | fclose(G.input_file_list[G.current_input_file++]); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 164 | } |
Denis Vlasenko | 666da5e | 2006-12-26 18:17:42 +0000 | [diff] [blame] | 165 | #else |
| 166 | void sed_free_and_close_stuff(void); |
Mark Whitley | c41e8c8 | 2000-07-12 23:35:21 +0000 | [diff] [blame] | 167 | #endif |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 168 | |
Rob Landley | 53302f8 | 2004-02-18 09:54:15 +0000 | [diff] [blame] | 169 | /* If something bad happens during -i operation, delete temp file */ |
| 170 | |
| 171 | static void cleanup_outname(void) |
| 172 | { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 173 | if (G.outname) unlink(G.outname); |
Rob Landley | 53302f8 | 2004-02-18 09:54:15 +0000 | [diff] [blame] | 174 | } |
| 175 | |
Denis Vlasenko | 4027664 | 2007-11-13 16:48:10 +0000 | [diff] [blame] | 176 | /* strcpy, replacing "\from" with 'to'. If to is NUL, replacing "\any" with 'any' */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 177 | |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 178 | static void parse_escapes(char *dest, const char *string, int len, char from, char to) |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 179 | { |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 180 | int i = 0; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 181 | |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 182 | while (i < len) { |
| 183 | if (string[i] == '\\') { |
| 184 | if (!to || string[i+1] == from) { |
Denis Vlasenko | 4ebaf10 | 2007-01-19 21:33:19 +0000 | [diff] [blame] | 185 | *dest++ = to ? to : string[i+1]; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 186 | i += 2; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 187 | continue; |
Denis Vlasenko | 4ebaf10 | 2007-01-19 21:33:19 +0000 | [diff] [blame] | 188 | } |
| 189 | *dest++ = string[i++]; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 190 | } |
Denis Vlasenko | 4027664 | 2007-11-13 16:48:10 +0000 | [diff] [blame] | 191 | /* TODO: is it safe wrt a string with trailing '\\' ? */ |
Denis Vlasenko | 4ebaf10 | 2007-01-19 21:33:19 +0000 | [diff] [blame] | 192 | *dest++ = string[i++]; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 193 | } |
Denis Vlasenko | 4027664 | 2007-11-13 16:48:10 +0000 | [diff] [blame] | 194 | *dest = '\0'; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 195 | } |
| 196 | |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 197 | static char *copy_parsing_escapes(const char *string, int len) |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 198 | { |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 199 | char *dest = xmalloc(len + 1); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 200 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 201 | parse_escapes(dest, string, len, 'n', '\n'); |
Denis Vlasenko | 4027664 | 2007-11-13 16:48:10 +0000 | [diff] [blame] | 202 | /* GNU sed also recognizes \t */ |
| 203 | parse_escapes(dest, dest, strlen(dest), 't', '\t'); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 204 | return dest; |
| 205 | } |
| 206 | |
| 207 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 208 | /* |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 209 | * index_of_next_unescaped_regexp_delim - walks left to right through a string |
| 210 | * beginning at a specified index and returns the index of the next regular |
Denis Vlasenko | 4027664 | 2007-11-13 16:48:10 +0000 | [diff] [blame] | 211 | * expression delimiter (typically a forward slash ('/')) not preceded by |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 212 | * a backslash ('\'). A negative delimiter disables square bracket checking. |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 213 | */ |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 214 | static int index_of_next_unescaped_regexp_delim(int delimiter, const char *str) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 215 | { |
Matt Kraai | a0065d5 | 2001-08-24 14:45:50 +0000 | [diff] [blame] | 216 | int bracket = -1; |
| 217 | int escaped = 0; |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 218 | int idx = 0; |
Eric Andersen | c52a6b0 | 2001-11-10 10:49:42 +0000 | [diff] [blame] | 219 | char ch; |
Matt Kraai | a0065d5 | 2001-08-24 14:45:50 +0000 | [diff] [blame] | 220 | |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 221 | if (delimiter < 0) { |
| 222 | bracket--; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 223 | delimiter = -delimiter; |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 224 | } |
| 225 | |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 226 | for (; (ch = str[idx]); idx++) { |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 227 | if (bracket >= 0) { |
Glenn L McGrath | d4185b0 | 2003-04-11 17:10:23 +0000 | [diff] [blame] | 228 | if (ch == ']' && !(bracket == idx - 1 || (bracket == idx - 2 |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 229 | && str[idx - 1] == '^'))) |
Matt Kraai | a0065d5 | 2001-08-24 14:45:50 +0000 | [diff] [blame] | 230 | bracket = -1; |
| 231 | } else if (escaped) |
| 232 | escaped = 0; |
Eric Andersen | c52a6b0 | 2001-11-10 10:49:42 +0000 | [diff] [blame] | 233 | else if (ch == '\\') |
Matt Kraai | a0065d5 | 2001-08-24 14:45:50 +0000 | [diff] [blame] | 234 | escaped = 1; |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 235 | else if (bracket == -1 && ch == '[') |
Matt Kraai | a0065d5 | 2001-08-24 14:45:50 +0000 | [diff] [blame] | 236 | bracket = idx; |
Glenn L McGrath | 1fb4467 | 2003-03-09 08:44:49 +0000 | [diff] [blame] | 237 | else if (ch == delimiter) |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 238 | return idx; |
| 239 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 240 | |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 241 | /* if we make it to here, we've hit the end of the string */ |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 242 | bb_error_msg_and_die("unmatched '%c'", delimiter); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 243 | } |
| 244 | |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 245 | /* |
| 246 | * Returns the index of the third delimiter |
| 247 | */ |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 248 | static int parse_regex_delim(const char *cmdstr, char **match, char **replace) |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 249 | { |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 250 | const char *cmdstr_ptr = cmdstr; |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 251 | char delimiter; |
| 252 | int idx = 0; |
| 253 | |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 254 | /* verify that the 's' or 'y' is followed by something. That something |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 255 | * (typically a 'slash') is now our regexp delimiter... */ |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 256 | if (*cmdstr == '\0') |
| 257 | bb_error_msg_and_die("bad format in substitution expression"); |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 258 | delimiter = *cmdstr_ptr++; |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 259 | |
| 260 | /* save the match string */ |
| 261 | idx = index_of_next_unescaped_regexp_delim(delimiter, cmdstr_ptr); |
Rob Landley | fae1dc8 | 2005-11-20 07:44:35 +0000 | [diff] [blame] | 262 | *match = copy_parsing_escapes(cmdstr_ptr, idx); |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 263 | |
| 264 | /* save the replacement string */ |
| 265 | cmdstr_ptr += idx + 1; |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 266 | idx = index_of_next_unescaped_regexp_delim(-delimiter, cmdstr_ptr); |
Rob Landley | fae1dc8 | 2005-11-20 07:44:35 +0000 | [diff] [blame] | 267 | *replace = copy_parsing_escapes(cmdstr_ptr, idx); |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 268 | |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 269 | return ((cmdstr_ptr - cmdstr) + idx); |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 270 | } |
| 271 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 272 | /* |
| 273 | * returns the index in the string just past where the address ends. |
| 274 | */ |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 275 | static int get_address(const char *my_str, int *linenum, regex_t ** regex) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 276 | { |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 277 | const char *pos = my_str; |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 278 | |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 279 | if (isdigit(*my_str)) { |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 280 | *linenum = strtol(my_str, (char**)&pos, 10); |
Glenn L McGrath | 1fb4467 | 2003-03-09 08:44:49 +0000 | [diff] [blame] | 281 | /* endstr shouldnt ever equal NULL */ |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 282 | } else if (*my_str == '$') { |
Mark Whitley | 0915c4b | 2001-06-11 23:50:06 +0000 | [diff] [blame] | 283 | *linenum = -1; |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 284 | pos++; |
| 285 | } else if (*my_str == '/' || *my_str == '\\') { |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 286 | int next; |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 287 | char delimiter; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 288 | char *temp; |
Glenn L McGrath | 1fb4467 | 2003-03-09 08:44:49 +0000 | [diff] [blame] | 289 | |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 290 | delimiter = '/'; |
| 291 | if (*my_str == '\\') delimiter = *++pos; |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 292 | next = index_of_next_unescaped_regexp_delim(delimiter, ++pos); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 293 | temp = copy_parsing_escapes(pos, next); |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 294 | *regex = xmalloc(sizeof(regex_t)); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 295 | xregcomp(*regex, temp, G.regex_type|REG_NEWLINE); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 296 | free(temp); |
| 297 | /* Move position to next character after last delimiter */ |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 298 | pos += (next+1); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 299 | } |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 300 | return pos - my_str; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 301 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 302 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 303 | /* Grab a filename. Whitespace at start is skipped, then goes to EOL. */ |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 304 | static int parse_file_cmd(/*sed_cmd_t *sed_cmd,*/ const char *filecmdstr, char **retval) |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 305 | { |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 306 | int start = 0, idx, hack = 0; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 307 | |
| 308 | /* Skip whitespace, then grab filename to end of line */ |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 309 | while (isspace(filecmdstr[start])) |
| 310 | start++; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 311 | idx = start; |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 312 | while (filecmdstr[idx] && filecmdstr[idx] != '\n') |
| 313 | idx++; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 314 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 315 | /* If lines glued together, put backslash back. */ |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 316 | if (filecmdstr[idx] == '\n') |
| 317 | hack = 1; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 318 | if (idx == start) |
| 319 | bb_error_msg_and_die("empty filename"); |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 320 | *retval = xstrndup(filecmdstr+start, idx-start+hack+1); |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 321 | if (hack) |
| 322 | (*retval)[idx] = '\\'; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 323 | |
| 324 | return idx; |
| 325 | } |
| 326 | |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 327 | static int parse_subst_cmd(sed_cmd_t *sed_cmd, const char *substr) |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 328 | { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 329 | int cflags = G.regex_type; |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 330 | char *match; |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 331 | int idx; |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 332 | |
| 333 | /* |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 334 | * A substitution command should look something like this: |
| 335 | * s/match/replace/ #gIpw |
Mark Whitley | 0e4cec0 | 2000-08-21 21:29:20 +0000 | [diff] [blame] | 336 | * || | ||| |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 337 | * mandatory optional |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 338 | */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 339 | idx = parse_regex_delim(substr, &match, &sed_cmd->string); |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 340 | |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 341 | /* determine the number of back references in the match string */ |
| 342 | /* Note: we compute this here rather than in the do_subst_command() |
| 343 | * function to save processor time, at the expense of a little more memory |
| 344 | * (4 bits) per sed_cmd */ |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 345 | |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 346 | /* process the flags */ |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 347 | |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 348 | sed_cmd->which_match = 1; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 349 | while (substr[++idx]) { |
| 350 | /* Parse match number */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 351 | if (isdigit(substr[idx])) { |
| 352 | if (match[0] != '^') { |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 353 | /* Match 0 treated as all, multiple matches we take the last one. */ |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 354 | const char *pos = substr + idx; |
| 355 | /* FIXME: error check? */ |
Denis Vlasenko | 284d0fa | 2008-02-16 13:18:17 +0000 | [diff] [blame] | 356 | sed_cmd->which_match = (unsigned)strtol(substr+idx, (char**) &pos, 10); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 357 | idx = pos - substr; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 358 | } |
| 359 | continue; |
| 360 | } |
Rob Landley | 40ec4ae | 2004-01-04 06:42:14 +0000 | [diff] [blame] | 361 | /* Skip spaces */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 362 | if (isspace(substr[idx])) continue; |
Rob Landley | 40ec4ae | 2004-01-04 06:42:14 +0000 | [diff] [blame] | 363 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 364 | switch (substr[idx]) { |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 365 | /* Replace all occurrences */ |
| 366 | case 'g': |
Denis Vlasenko | 284d0fa | 2008-02-16 13:18:17 +0000 | [diff] [blame] | 367 | if (match[0] != '^') |
| 368 | sed_cmd->which_match = 0; |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 369 | break; |
| 370 | /* Print pattern space */ |
| 371 | case 'p': |
| 372 | sed_cmd->sub_p = 1; |
| 373 | break; |
| 374 | /* Write to file */ |
| 375 | case 'w': |
| 376 | { |
| 377 | char *temp; |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 378 | idx += parse_file_cmd(/*sed_cmd,*/ substr+idx, &temp); |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 379 | break; |
| 380 | } |
| 381 | /* Ignore case (gnu exension) */ |
| 382 | case 'I': |
| 383 | cflags |= REG_ICASE; |
| 384 | break; |
| 385 | /* Comment */ |
| 386 | case '#': |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 387 | while (substr[++idx]) /*skip all*/; |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 388 | /* Fall through */ |
| 389 | /* End of command */ |
| 390 | case ';': |
| 391 | case '}': |
| 392 | goto out; |
| 393 | default: |
| 394 | bb_error_msg_and_die("bad option in substitution expression"); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 395 | } |
| 396 | } |
Glenn L McGrath | 2570b43 | 2003-09-16 05:25:43 +0000 | [diff] [blame] | 397 | out: |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 398 | /* compile the match string into a regex */ |
Glenn L McGrath | c1d9507 | 2003-04-08 06:42:45 +0000 | [diff] [blame] | 399 | if (*match != '\0') { |
| 400 | /* If match is empty, we use last regex used at runtime */ |
Denis Vlasenko | b95636c | 2006-12-19 23:36:04 +0000 | [diff] [blame] | 401 | sed_cmd->sub_match = xmalloc(sizeof(regex_t)); |
Glenn L McGrath | c1d9507 | 2003-04-08 06:42:45 +0000 | [diff] [blame] | 402 | xregcomp(sed_cmd->sub_match, match, cflags); |
| 403 | } |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 404 | free(match); |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 405 | |
| 406 | return idx; |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 407 | } |
| 408 | |
Glenn L McGrath | 2971ef1 | 2003-03-18 01:19:23 +0000 | [diff] [blame] | 409 | /* |
| 410 | * Process the commands arguments |
| 411 | */ |
Denis Vlasenko | 9356b50 | 2007-01-29 23:44:38 +0000 | [diff] [blame] | 412 | static const char *parse_cmd_args(sed_cmd_t *sed_cmd, const char *cmdstr) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 413 | { |
Glenn L McGrath | 2f8a401 | 2003-03-09 02:44:49 +0000 | [diff] [blame] | 414 | /* handle (s)ubstitution command */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 415 | if (sed_cmd->cmd == 's') |
| 416 | cmdstr += parse_subst_cmd(sed_cmd, cmdstr); |
Glenn L McGrath | 2f8a401 | 2003-03-09 02:44:49 +0000 | [diff] [blame] | 417 | /* handle edit cmds: (a)ppend, (i)nsert, and (c)hange */ |
| 418 | else if (strchr("aic", sed_cmd->cmd)) { |
| 419 | if ((sed_cmd->end_line || sed_cmd->end_match) && sed_cmd->cmd != 'c') |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 420 | bb_error_msg_and_die |
| 421 | ("only a beginning address can be specified for edit commands"); |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 422 | for (;;) { |
| 423 | if (*cmdstr == '\n' || *cmdstr == '\\') { |
Rob Landley | 25d8239 | 2004-04-01 09:23:30 +0000 | [diff] [blame] | 424 | cmdstr++; |
| 425 | break; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 426 | } else if (isspace(*cmdstr)) |
| 427 | cmdstr++; |
| 428 | else |
| 429 | break; |
Rob Landley | 25d8239 | 2004-04-01 09:23:30 +0000 | [diff] [blame] | 430 | } |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 431 | sed_cmd->string = xstrdup(cmdstr); |
Denis Vlasenko | 4027664 | 2007-11-13 16:48:10 +0000 | [diff] [blame] | 432 | /* "\anychar" -> "anychar" */ |
| 433 | parse_escapes(sed_cmd->string, sed_cmd->string, strlen(cmdstr), '\0', '\0'); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 434 | cmdstr += strlen(cmdstr); |
Glenn L McGrath | 2f8a401 | 2003-03-09 02:44:49 +0000 | [diff] [blame] | 435 | /* handle file cmds: (r)ead */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 436 | } else if (strchr("rw", sed_cmd->cmd)) { |
Glenn L McGrath | 2f8a401 | 2003-03-09 02:44:49 +0000 | [diff] [blame] | 437 | if (sed_cmd->end_line || sed_cmd->end_match) |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 438 | bb_error_msg_and_die("command only uses one address"); |
Denis Vlasenko | 68404f1 | 2008-03-17 09:00:54 +0000 | [diff] [blame] | 439 | cmdstr += parse_file_cmd(/*sed_cmd,*/ cmdstr, &sed_cmd->string); |
Denis Vlasenko | c562bb7 | 2007-01-29 17:08:51 +0000 | [diff] [blame] | 440 | if (sed_cmd->cmd == 'w') { |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 441 | sed_cmd->sw_file = xfopen(sed_cmd->string, "w"); |
Denis Vlasenko | c562bb7 | 2007-01-29 17:08:51 +0000 | [diff] [blame] | 442 | sed_cmd->sw_last_char = '\n'; |
| 443 | } |
Glenn L McGrath | 961c6c1 | 2003-03-28 04:43:39 +0000 | [diff] [blame] | 444 | /* handle branch commands */ |
Rob Landley | 93850a5 | 2005-05-18 06:34:37 +0000 | [diff] [blame] | 445 | } else if (strchr(":btT", sed_cmd->cmd)) { |
Glenn L McGrath | 961c6c1 | 2003-03-28 04:43:39 +0000 | [diff] [blame] | 446 | int length; |
| 447 | |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 448 | cmdstr = skip_whitespace(cmdstr); |
Glenn L McGrath | f452356 | 2003-09-14 06:01:14 +0000 | [diff] [blame] | 449 | length = strcspn(cmdstr, semicolon_whitespace); |
| 450 | if (length) { |
Rob Landley | d921b2e | 2006-08-03 15:41:12 +0000 | [diff] [blame] | 451 | sed_cmd->string = xstrndup(cmdstr, length); |
Glenn L McGrath | f452356 | 2003-09-14 06:01:14 +0000 | [diff] [blame] | 452 | cmdstr += length; |
| 453 | } |
Glenn L McGrath | 961c6c1 | 2003-03-28 04:43:39 +0000 | [diff] [blame] | 454 | } |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 455 | /* translation command */ |
| 456 | else if (sed_cmd->cmd == 'y') { |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 457 | char *match, *replace; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 458 | int i = cmdstr[0]; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 459 | |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 460 | cmdstr += parse_regex_delim(cmdstr, &match, &replace)+1; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 461 | /* \n already parsed, but \delimiter needs unescaping. */ |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 462 | parse_escapes(match, match, strlen(match), i, i); |
| 463 | parse_escapes(replace, replace, strlen(replace), i, i); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 464 | |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 465 | sed_cmd->string = xzalloc((strlen(match) + 1) * 2); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 466 | for (i = 0; match[i] && replace[i]; i++) { |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 467 | sed_cmd->string[i*2] = match[i]; |
| 468 | sed_cmd->string[i*2+1] = replace[i]; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 469 | } |
| 470 | free(match); |
| 471 | free(replace); |
Glenn L McGrath | f01b46d | 2003-03-30 08:02:18 +0000 | [diff] [blame] | 472 | } |
Glenn L McGrath | 2971ef1 | 2003-03-18 01:19:23 +0000 | [diff] [blame] | 473 | /* if it wasnt a single-letter command that takes no arguments |
| 474 | * then it must be an invalid command. |
| 475 | */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 476 | else if (strchr("dDgGhHlnNpPqx={}", sed_cmd->cmd) == 0) { |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 477 | bb_error_msg_and_die("unsupported command %c", sed_cmd->cmd); |
Mark Whitley | 1f3b9f2 | 2001-05-11 22:27:13 +0000 | [diff] [blame] | 478 | } |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 479 | |
| 480 | /* give back whatever's left over */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 481 | return cmdstr; |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 482 | } |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 483 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 484 | |
| 485 | /* Parse address+command sets, skipping comment lines. */ |
| 486 | |
Denis Vlasenko | b6aae0f | 2007-01-29 22:51:25 +0000 | [diff] [blame] | 487 | static void add_cmd(const char *cmdstr) |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 488 | { |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 489 | sed_cmd_t *sed_cmd; |
Glenn L McGrath | 586d86c | 2003-10-09 07:22:59 +0000 | [diff] [blame] | 490 | int temp; |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 491 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 492 | /* Append this line to any unfinished line from last time. */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 493 | if (G.add_cmd_line) { |
| 494 | char *tp = xasprintf("%s\n%s", G.add_cmd_line, cmdstr); |
| 495 | free(G.add_cmd_line); |
Denis Vlasenko | 945bd3d | 2007-04-12 21:20:25 +0000 | [diff] [blame] | 496 | cmdstr = G.add_cmd_line = tp; |
Rob Landley | 12d8755 | 2006-06-05 17:32:44 +0000 | [diff] [blame] | 497 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 498 | |
| 499 | /* If this line ends with backslash, request next line. */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 500 | temp = strlen(cmdstr); |
Denis Vlasenko | 945bd3d | 2007-04-12 21:20:25 +0000 | [diff] [blame] | 501 | if (temp && cmdstr[--temp] == '\\') { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 502 | if (!G.add_cmd_line) |
| 503 | G.add_cmd_line = xstrdup(cmdstr); |
Denis Vlasenko | 945bd3d | 2007-04-12 21:20:25 +0000 | [diff] [blame] | 504 | G.add_cmd_line[temp] = '\0'; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 505 | return; |
Glenn L McGrath | f50ce31 | 2003-03-09 15:12:24 +0000 | [diff] [blame] | 506 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 507 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 508 | /* Loop parsing all commands in this line. */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 509 | while (*cmdstr) { |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 510 | /* Skip leading whitespace and semicolons */ |
| 511 | cmdstr += strspn(cmdstr, semicolon_whitespace); |
| 512 | |
| 513 | /* If no more commands, exit. */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 514 | if (!*cmdstr) break; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 515 | |
| 516 | /* if this is a comment, jump past it and keep going */ |
| 517 | if (*cmdstr == '#') { |
| 518 | /* "#n" is the same as using -n on the command line */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 519 | if (cmdstr[1] == 'n') |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 520 | G.be_quiet++; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 521 | cmdstr = strpbrk(cmdstr, "\n\r"); |
| 522 | if (!cmdstr) break; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 523 | continue; |
Glenn L McGrath | c1d9507 | 2003-04-08 06:42:45 +0000 | [diff] [blame] | 524 | } |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 525 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 526 | /* parse the command |
| 527 | * format is: [addr][,addr][!]cmd |
| 528 | * |----||-----||-| |
| 529 | * part1 part2 part3 |
Glenn L McGrath | f50ce31 | 2003-03-09 15:12:24 +0000 | [diff] [blame] | 530 | */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 531 | |
Rob Landley | 9ffd423 | 2006-05-21 18:30:35 +0000 | [diff] [blame] | 532 | sed_cmd = xzalloc(sizeof(sed_cmd_t)); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 533 | |
| 534 | /* first part (if present) is an address: either a '$', a number or a /regex/ */ |
| 535 | cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match); |
| 536 | |
| 537 | /* second part (if present) will begin with a comma */ |
| 538 | if (*cmdstr == ',') { |
| 539 | int idx; |
| 540 | |
Glenn L McGrath | f50ce31 | 2003-03-09 15:12:24 +0000 | [diff] [blame] | 541 | cmdstr++; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 542 | idx = get_address(cmdstr, &sed_cmd->end_line, &sed_cmd->end_match); |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 543 | if (!idx) |
| 544 | bb_error_msg_and_die("no address after comma"); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 545 | cmdstr += idx; |
Glenn L McGrath | f50ce31 | 2003-03-09 15:12:24 +0000 | [diff] [blame] | 546 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 547 | |
| 548 | /* skip whitespace before the command */ |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 549 | cmdstr = skip_whitespace(cmdstr); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 550 | |
| 551 | /* Check for inversion flag */ |
| 552 | if (*cmdstr == '!') { |
| 553 | sed_cmd->invert = 1; |
| 554 | cmdstr++; |
| 555 | |
| 556 | /* skip whitespace before the command */ |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 557 | cmdstr = skip_whitespace(cmdstr); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 558 | } |
| 559 | |
| 560 | /* last part (mandatory) will be a command */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 561 | if (!*cmdstr) |
| 562 | bb_error_msg_and_die("missing command"); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 563 | sed_cmd->cmd = *(cmdstr++); |
| 564 | cmdstr = parse_cmd_args(sed_cmd, cmdstr); |
| 565 | |
| 566 | /* Add the command to the command array */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 567 | G.sed_cmd_tail->next = sed_cmd; |
| 568 | G.sed_cmd_tail = G.sed_cmd_tail->next; |
Glenn L McGrath | f50ce31 | 2003-03-09 15:12:24 +0000 | [diff] [blame] | 569 | } |
| 570 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 571 | /* If we glued multiple lines together, free the memory. */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 572 | free(G.add_cmd_line); |
| 573 | G.add_cmd_line = NULL; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 574 | } |
| 575 | |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 576 | /* Append to a string, reallocating memory as necessary. */ |
| 577 | |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 578 | #define PIPE_GROW 64 |
Eric Andersen | c52a6b0 | 2001-11-10 10:49:42 +0000 | [diff] [blame] | 579 | |
Eric Andersen | 14f5c8d | 2005-04-16 19:39:00 +0000 | [diff] [blame] | 580 | static void pipe_putc(char c) |
Eric Andersen | c52a6b0 | 2001-11-10 10:49:42 +0000 | [diff] [blame] | 581 | { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 582 | if (G.pipeline.idx == G.pipeline.len) { |
| 583 | G.pipeline.buf = xrealloc(G.pipeline.buf, |
| 584 | G.pipeline.len + PIPE_GROW); |
| 585 | G.pipeline.len += PIPE_GROW; |
Eric Andersen | c52a6b0 | 2001-11-10 10:49:42 +0000 | [diff] [blame] | 586 | } |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 587 | G.pipeline.buf[G.pipeline.idx++] = c; |
Eric Andersen | c52a6b0 | 2001-11-10 10:49:42 +0000 | [diff] [blame] | 588 | } |
| 589 | |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 590 | static void do_subst_w_backrefs(char *line, char *replace) |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 591 | { |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 592 | int i,j; |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 593 | |
| 594 | /* go through the replacement string */ |
| 595 | for (i = 0; replace[i]; i++) { |
| 596 | /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */ |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 597 | if (replace[i] == '\\') { |
| 598 | unsigned backref = replace[++i] - '0'; |
| 599 | if (backref <= 9) { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 600 | /* print out the text held in G.regmatch[backref] */ |
| 601 | if (G.regmatch[backref].rm_so != -1) { |
| 602 | j = G.regmatch[backref].rm_so; |
| 603 | while (j < G.regmatch[backref].rm_eo) |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 604 | pipe_putc(line[j++]); |
| 605 | } |
| 606 | continue; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 607 | } |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 608 | /* I _think_ it is impossible to get '\' to be |
| 609 | * the last char in replace string. Thus we dont check |
| 610 | * for replace[i] == NUL. (counterexample anyone?) */ |
| 611 | /* if we find a backslash escaped character, print the character */ |
| 612 | pipe_putc(replace[i]); |
| 613 | continue; |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 614 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 615 | /* if we find an unescaped '&' print out the whole matched text. */ |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 616 | if (replace[i] == '&') { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 617 | j = G.regmatch[0].rm_so; |
| 618 | while (j < G.regmatch[0].rm_eo) |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 619 | pipe_putc(line[j++]); |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 620 | continue; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 621 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 622 | /* Otherwise just output the character. */ |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 623 | pipe_putc(replace[i]); |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 624 | } |
| 625 | } |
| 626 | |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 627 | static int do_subst_command(sed_cmd_t *sed_cmd, char **line) |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 628 | { |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 629 | char *oldline = *line; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 630 | int altered = 0; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 631 | int match_count = 0; |
Glenn L McGrath | c1d9507 | 2003-04-08 06:42:45 +0000 | [diff] [blame] | 632 | regex_t *current_regex; |
| 633 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 634 | /* Handle empty regex. */ |
Glenn L McGrath | c1d9507 | 2003-04-08 06:42:45 +0000 | [diff] [blame] | 635 | if (sed_cmd->sub_match == NULL) { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 636 | current_regex = G.previous_regex_ptr; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 637 | if (!current_regex) |
Denis Vlasenko | d3d004d | 2006-10-27 09:02:31 +0000 | [diff] [blame] | 638 | bb_error_msg_and_die("no previous regexp"); |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 639 | } else |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 640 | G.previous_regex_ptr = current_regex = sed_cmd->sub_match; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 641 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 642 | /* Find the first match */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 643 | if (REG_NOMATCH == regexec(current_regex, oldline, 10, G.regmatch, 0)) |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 644 | return 0; |
| 645 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 646 | /* Initialize temporary output buffer. */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 647 | G.pipeline.buf = xmalloc(PIPE_GROW); |
| 648 | G.pipeline.len = PIPE_GROW; |
| 649 | G.pipeline.idx = 0; |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 650 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 651 | /* Now loop through, substituting for matches */ |
| 652 | do { |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 653 | int i; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 654 | |
Eric Andersen | c06f568 | 2004-02-04 10:57:46 +0000 | [diff] [blame] | 655 | /* Work around bug in glibc regexec, demonstrated by: |
| 656 | echo " a.b" | busybox sed 's [^ .]* x g' |
| 657 | The match_count check is so not to break |
| 658 | echo "hi" | busybox sed 's/^/!/g' */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 659 | if (!G.regmatch[0].rm_so && !G.regmatch[0].rm_eo && match_count) { |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 660 | pipe_putc(*oldline++); |
Eric Andersen | c06f568 | 2004-02-04 10:57:46 +0000 | [diff] [blame] | 661 | continue; |
| 662 | } |
| 663 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 664 | match_count++; |
| 665 | |
| 666 | /* If we aren't interested in this match, output old line to |
| 667 | end of match and continue */ |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 668 | if (sed_cmd->which_match && sed_cmd->which_match != match_count) { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 669 | for (i = 0; i < G.regmatch[0].rm_eo; i++) |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 670 | pipe_putc(*oldline++); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 671 | continue; |
| 672 | } |
| 673 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 674 | /* print everything before the match */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 675 | for (i = 0; i < G.regmatch[0].rm_so; i++) |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 676 | pipe_putc(oldline[i]); |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 677 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 678 | /* then print the substitution string */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 679 | do_subst_w_backrefs(oldline, sed_cmd->string); |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 680 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 681 | /* advance past the match */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 682 | oldline += G.regmatch[0].rm_eo; |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 683 | /* flag that something has changed */ |
| 684 | altered++; |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 685 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 686 | /* if we're not doing this globally, get out now */ |
Denis Vlasenko | 284d0fa | 2008-02-16 13:18:17 +0000 | [diff] [blame] | 687 | if (sed_cmd->which_match) |
| 688 | break; |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 689 | } while (*oldline && (regexec(current_regex, oldline, 10, G.regmatch, 0) != REG_NOMATCH)); |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 690 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 691 | /* Copy rest of string into output pipeline */ |
| 692 | |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 693 | while (*oldline) |
| 694 | pipe_putc(*oldline++); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 695 | pipe_putc(0); |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 696 | |
Eric Andersen | b76cb68 | 2001-08-22 05:58:16 +0000 | [diff] [blame] | 697 | free(*line); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 698 | *line = G.pipeline.buf; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 699 | return altered; |
| 700 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 701 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 702 | /* Set command pointer to point to this label. (Does not handle null label.) */ |
Rob Landley | 4795e4e | 2006-07-26 17:25:08 +0000 | [diff] [blame] | 703 | static sed_cmd_t *branch_to(char *label) |
Glenn L McGrath | 961c6c1 | 2003-03-28 04:43:39 +0000 | [diff] [blame] | 704 | { |
| 705 | sed_cmd_t *sed_cmd; |
Glenn L McGrath | d4185b0 | 2003-04-11 17:10:23 +0000 | [diff] [blame] | 706 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 707 | for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) { |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 708 | if (sed_cmd->cmd == ':' && sed_cmd->string && !strcmp(sed_cmd->string, label)) { |
| 709 | return sed_cmd; |
Glenn L McGrath | 961c6c1 | 2003-03-28 04:43:39 +0000 | [diff] [blame] | 710 | } |
| 711 | } |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 712 | bb_error_msg_and_die("can't find label for jump to '%s'", label); |
Glenn L McGrath | 961c6c1 | 2003-03-28 04:43:39 +0000 | [diff] [blame] | 713 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 714 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 715 | static void append(char *s) |
| 716 | { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 717 | llist_add_to_end(&G.append_head, xstrdup(s)); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | static void flush_append(void) |
| 721 | { |
Rob Landley | 0b65628 | 2006-05-08 22:17:23 +0000 | [diff] [blame] | 722 | char *data; |
| 723 | |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 724 | /* Output appended lines. */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 725 | while ((data = (char *)llist_pop(&G.append_head))) { |
| 726 | fprintf(G.nonstdout, "%s\n", data); |
Rob Landley | 0b65628 | 2006-05-08 22:17:23 +0000 | [diff] [blame] | 727 | free(data); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 728 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 729 | } |
| 730 | |
Eric Andersen | 14f5c8d | 2005-04-16 19:39:00 +0000 | [diff] [blame] | 731 | static void add_input_file(FILE *file) |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 732 | { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 733 | G.input_file_list = xrealloc(G.input_file_list, |
| 734 | (G.input_file_count + 1) * sizeof(FILE *)); |
| 735 | G.input_file_list[G.input_file_count++] = file; |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 736 | } |
| 737 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 738 | /* Get next line of input from G.input_file_list, flushing append buffer and |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 739 | * noting if we ran out of files without a newline on the last line we read. |
| 740 | */ |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 741 | enum { |
| 742 | NO_EOL_CHAR = 1, |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 743 | LAST_IS_NUL = 2, |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 744 | }; |
| 745 | static char *get_next_line(char *gets_char) |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 746 | { |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 747 | char *temp = NULL; |
Denis Vlasenko | c562bb7 | 2007-01-29 17:08:51 +0000 | [diff] [blame] | 748 | int len; |
| 749 | char gc; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 750 | |
| 751 | flush_append(); |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 752 | |
| 753 | /* will be returned if last line in the file |
| 754 | * doesn't end with either '\n' or '\0' */ |
| 755 | gc = NO_EOL_CHAR; |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 756 | while (G.current_input_file < G.input_file_count) { |
| 757 | FILE *fp = G.input_file_list[G.current_input_file]; |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 758 | /* Read line up to a newline or NUL byte, inclusive, |
| 759 | * return malloc'ed char[]. length of the chunk read |
| 760 | * is stored in len. NULL if EOF/error */ |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 761 | temp = bb_get_chunk_from_file(fp, &len); |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 762 | if (temp) { |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 763 | /* len > 0 here, it's ok to do temp[len-1] */ |
| 764 | char c = temp[len-1]; |
| 765 | if (c == '\n' || c == '\0') { |
| 766 | temp[len-1] = '\0'; |
Denis Vlasenko | c562bb7 | 2007-01-29 17:08:51 +0000 | [diff] [blame] | 767 | gc = c; |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 768 | if (c == '\0') { |
| 769 | int ch = fgetc(fp); |
| 770 | if (ch != EOF) |
| 771 | ungetc(ch, fp); |
| 772 | else |
| 773 | gc = LAST_IS_NUL; |
| 774 | } |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 775 | } |
Denis Vlasenko | c562bb7 | 2007-01-29 17:08:51 +0000 | [diff] [blame] | 776 | /* else we put NO_EOL_CHAR into *gets_char */ |
| 777 | break; |
| 778 | |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 779 | /* NB: I had the idea of peeking next file(s) and returning |
| 780 | * NO_EOL_CHAR only if it is the *last* non-empty |
| 781 | * input file. But there is a case where this won't work: |
| 782 | * file1: "a woo\nb woo" |
| 783 | * file2: "c no\nd no" |
| 784 | * sed -ne 's/woo/bang/p' input1 input2 => "a bang\nb bang" |
| 785 | * (note: *no* newline after "b bang"!) */ |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 786 | } |
| 787 | /* Close this file and advance to next one */ |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 788 | fclose(fp); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 789 | G.current_input_file++; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 790 | } |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 791 | *gets_char = gc; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 792 | return temp; |
| 793 | } |
| 794 | |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 795 | /* Output line of text. */ |
| 796 | /* Note: |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 797 | * The tricks with NO_EOL_CHAR and last_puts_char are there to emulate gnu sed. |
Denis Vlasenko | 1375bc7 | 2006-12-02 20:12:12 +0000 | [diff] [blame] | 798 | * Without them, we had this: |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 799 | * echo -n thingy >z1 |
| 800 | * echo -n again >z2 |
| 801 | * >znull |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 802 | * sed "s/i/z/" z1 z2 znull | hexdump -vC |
| 803 | * output: |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 804 | * gnu sed 4.1.5: |
| 805 | * 00000000 74 68 7a 6e 67 79 0a 61 67 61 7a 6e |thzngy.agazn| |
| 806 | * bbox: |
| 807 | * 00000000 74 68 7a 6e 67 79 61 67 61 7a 6e |thzngyagazn| |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 808 | */ |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 809 | static void puts_maybe_newline(char *s, FILE *file, char *last_puts_char, char last_gets_char) |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 810 | { |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 811 | char lpc = *last_puts_char; |
Denis Vlasenko | 1375bc7 | 2006-12-02 20:12:12 +0000 | [diff] [blame] | 812 | |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 813 | /* Need to insert a '\n' between two files because first file's |
| 814 | * last line wasn't terminated? */ |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 815 | if (lpc != '\n' && lpc != '\0') { |
Denis Vlasenko | 1375bc7 | 2006-12-02 20:12:12 +0000 | [diff] [blame] | 816 | fputc('\n', file); |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 817 | lpc = '\n'; |
Denis Vlasenko | 1375bc7 | 2006-12-02 20:12:12 +0000 | [diff] [blame] | 818 | } |
Denis Vlasenko | 8b22b07 | 2006-12-02 17:58:10 +0000 | [diff] [blame] | 819 | fputs(s, file); |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 820 | |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 821 | /* 'x' - just something which is not '\n', '\0' or NO_EOL_CHAR */ |
Denis Vlasenko | ef44d9d | 2007-01-17 23:16:16 +0000 | [diff] [blame] | 822 | if (s[0]) |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 823 | lpc = 'x'; |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 824 | |
| 825 | /* had trailing '\0' and it was last char of file? */ |
| 826 | if (last_gets_char == LAST_IS_NUL) { |
| 827 | fputc('\0', file); |
| 828 | lpc = 'x'; /* */ |
| 829 | } else |
| 830 | /* had trailing '\n' or '\0'? */ |
| 831 | if (last_gets_char != NO_EOL_CHAR) { |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 832 | fputc(last_gets_char, file); |
| 833 | lpc = last_gets_char; |
Denis Vlasenko | 1375bc7 | 2006-12-02 20:12:12 +0000 | [diff] [blame] | 834 | } |
Denis Vlasenko | 8681180 | 2007-01-29 17:10:19 +0000 | [diff] [blame] | 835 | |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 836 | if (ferror(file)) { |
Denis Vlasenko | 4092082 | 2006-10-03 20:28:06 +0000 | [diff] [blame] | 837 | xfunc_error_retval = 4; /* It's what gnu sed exits with... */ |
Bernhard Reutner-Fischer | a3d4bf3 | 2006-06-03 21:40:11 +0000 | [diff] [blame] | 838 | bb_error_msg_and_die(bb_msg_write_error); |
Rob Landley | 53302f8 | 2004-02-18 09:54:15 +0000 | [diff] [blame] | 839 | } |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 840 | *last_puts_char = lpc; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 841 | } |
| 842 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 843 | #define sed_puts(s, n) (puts_maybe_newline(s, G.nonstdout, &last_puts_char, n)) |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 844 | |
Denis Vlasenko | 8274e06 | 2007-08-06 03:41:08 +0000 | [diff] [blame] | 845 | static int beg_match(sed_cmd_t *sed_cmd, const char *pattern_space) |
| 846 | { |
| 847 | int retval = sed_cmd->beg_match && !regexec(sed_cmd->beg_match, pattern_space, 0, NULL, 0); |
| 848 | if (retval) |
| 849 | G.previous_regex_ptr = sed_cmd->beg_match; |
| 850 | return retval; |
| 851 | } |
| 852 | |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 853 | /* Process all the lines in all the files */ |
| 854 | |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 855 | static void process_files(void) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 856 | { |
Rob Landley | ce4f0e9 | 2004-10-30 06:54:19 +0000 | [diff] [blame] | 857 | char *pattern_space, *next_line; |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 858 | int linenum = 0; |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 859 | char last_puts_char = '\n'; |
| 860 | char last_gets_char, next_gets_char; |
Denis Vlasenko | 2ea630f | 2006-12-10 02:52:19 +0000 | [diff] [blame] | 861 | sed_cmd_t *sed_cmd; |
| 862 | int substituted; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 863 | |
Rob Landley | 2b26fd5 | 2006-02-24 02:30:39 +0000 | [diff] [blame] | 864 | /* Prime the pump */ |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 865 | next_line = get_next_line(&next_gets_char); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 866 | |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 867 | /* go through every line in each file */ |
Denis Vlasenko | f39c7c0 | 2008-02-28 17:59:01 +0000 | [diff] [blame] | 868 | again: |
Denis Vlasenko | 2ea630f | 2006-12-10 02:52:19 +0000 | [diff] [blame] | 869 | substituted = 0; |
Glenn L McGrath | 505bd0f | 2003-03-08 05:21:02 +0000 | [diff] [blame] | 870 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 871 | /* Advance to next line. Stop if out of lines. */ |
| 872 | pattern_space = next_line; |
| 873 | if (!pattern_space) return; |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 874 | last_gets_char = next_gets_char; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 875 | |
| 876 | /* Read one line in advance so we can act on the last line, |
| 877 | * the '$' address */ |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 878 | next_line = get_next_line(&next_gets_char); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 879 | linenum++; |
Denis Vlasenko | f39c7c0 | 2008-02-28 17:59:01 +0000 | [diff] [blame] | 880 | restart: |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 881 | /* for every line, go through all the commands */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 882 | for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) { |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 883 | int old_matched, matched; |
Eric Andersen | 52a3c27 | 2003-12-23 08:53:51 +0000 | [diff] [blame] | 884 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 885 | old_matched = sed_cmd->in_match; |
Mark Whitley | 0915c4b | 2001-06-11 23:50:06 +0000 | [diff] [blame] | 886 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 887 | /* Determine if this command matches this line: */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 888 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 889 | /* Are we continuing a previous multi-line match? */ |
| 890 | sed_cmd->in_match = sed_cmd->in_match |
| 891 | /* Or is no range necessary? */ |
| 892 | || (!sed_cmd->beg_line && !sed_cmd->end_line |
| 893 | && !sed_cmd->beg_match && !sed_cmd->end_match) |
| 894 | /* Or did we match the start of a numerical range? */ |
| 895 | || (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum)) |
| 896 | /* Or does this line match our begin address regex? */ |
Denis Vlasenko | 8274e06 | 2007-08-06 03:41:08 +0000 | [diff] [blame] | 897 | || (beg_match(sed_cmd, pattern_space)) |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 898 | /* Or did we match last line of input? */ |
| 899 | || (sed_cmd->beg_line == -1 && next_line == NULL); |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 900 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 901 | /* Snapshot the value */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 902 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 903 | matched = sed_cmd->in_match; |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 904 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 905 | /* Is this line the end of the current match? */ |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 906 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 907 | if (matched) { |
| 908 | sed_cmd->in_match = !( |
| 909 | /* has the ending line come, or is this a single address command? */ |
| 910 | (sed_cmd->end_line ? |
| 911 | sed_cmd->end_line == -1 ? |
| 912 | !next_line |
| 913 | : (sed_cmd->end_line <= linenum) |
| 914 | : !sed_cmd->end_match |
| 915 | ) |
| 916 | /* or does this line matches our last address regex */ |
| 917 | || (sed_cmd->end_match && old_matched |
| 918 | && (regexec(sed_cmd->end_match, |
Denis Vlasenko | 8e858e2 | 2007-03-07 09:35:43 +0000 | [diff] [blame] | 919 | pattern_space, 0, NULL, 0) == 0)) |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 920 | ); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 921 | } |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 922 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 923 | /* Skip blocks of commands we didn't match. */ |
| 924 | if (sed_cmd->cmd == '{') { |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 925 | if (sed_cmd->invert ? matched : !matched) { |
| 926 | while (sed_cmd->cmd != '}') { |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 927 | sed_cmd = sed_cmd->next; |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 928 | if (!sed_cmd) |
| 929 | bb_error_msg_and_die("unterminated {"); |
| 930 | } |
| 931 | } |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 932 | continue; |
| 933 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 934 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 935 | /* Okay, so did this line match? */ |
| 936 | if (sed_cmd->invert ? !matched : matched) { |
| 937 | /* Update last used regex in case a blank substitute BRE is found */ |
| 938 | if (sed_cmd->beg_match) { |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 939 | G.previous_regex_ptr = sed_cmd->beg_match; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 940 | } |
| 941 | |
| 942 | /* actual sedding */ |
| 943 | switch (sed_cmd->cmd) { |
| 944 | |
| 945 | /* Print line number */ |
| 946 | case '=': |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 947 | fprintf(G.nonstdout, "%d\n", linenum); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 948 | break; |
| 949 | |
| 950 | /* Write the current pattern space up to the first newline */ |
| 951 | case 'P': |
| 952 | { |
| 953 | char *tmp = strchr(pattern_space, '\n'); |
| 954 | |
| 955 | if (tmp) { |
| 956 | *tmp = '\0'; |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 957 | /* TODO: explain why '\n' below */ |
| 958 | sed_puts(pattern_space, '\n'); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 959 | *tmp = '\n'; |
| 960 | break; |
| 961 | } |
| 962 | /* Fall Through */ |
| 963 | } |
| 964 | |
| 965 | /* Write the current pattern space to output */ |
| 966 | case 'p': |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 967 | /* NB: we print this _before_ the last line |
| 968 | * (of current file) is printed. Even if |
| 969 | * that line is nonterminated, we print |
| 970 | * '\n' here (gnu sed does the same) */ |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 971 | sed_puts(pattern_space, '\n'); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 972 | break; |
| 973 | /* Delete up through first newline */ |
| 974 | case 'D': |
| 975 | { |
| 976 | char *tmp = strchr(pattern_space, '\n'); |
| 977 | |
| 978 | if (tmp) { |
| 979 | tmp = xstrdup(tmp+1); |
| 980 | free(pattern_space); |
| 981 | pattern_space = tmp; |
| 982 | goto restart; |
| 983 | } |
| 984 | } |
| 985 | /* discard this line. */ |
| 986 | case 'd': |
| 987 | goto discard_line; |
| 988 | |
| 989 | /* Substitute with regex */ |
| 990 | case 's': |
| 991 | if (!do_subst_command(sed_cmd, &pattern_space)) |
| 992 | break; |
| 993 | substituted |= 1; |
| 994 | |
| 995 | /* handle p option */ |
| 996 | if (sed_cmd->sub_p) |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 997 | sed_puts(pattern_space, last_gets_char); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 998 | /* handle w option */ |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 999 | if (sed_cmd->sw_file) |
| 1000 | puts_maybe_newline( |
| 1001 | pattern_space, sed_cmd->sw_file, |
| 1002 | &sed_cmd->sw_last_char, last_gets_char); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1003 | break; |
| 1004 | |
| 1005 | /* Append line to linked list to be printed later */ |
| 1006 | case 'a': |
| 1007 | append(sed_cmd->string); |
| 1008 | break; |
| 1009 | |
| 1010 | /* Insert text before this line */ |
| 1011 | case 'i': |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 1012 | sed_puts(sed_cmd->string, '\n'); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1013 | break; |
| 1014 | |
| 1015 | /* Cut and paste text (replace) */ |
| 1016 | case 'c': |
| 1017 | /* Only triggers on last line of a matching range. */ |
| 1018 | if (!sed_cmd->in_match) |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1019 | sed_puts(sed_cmd->string, NO_EOL_CHAR); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1020 | goto discard_line; |
| 1021 | |
| 1022 | /* Read file, append contents to output */ |
| 1023 | case 'r': |
| 1024 | { |
| 1025 | FILE *rfile; |
| 1026 | |
| 1027 | rfile = fopen(sed_cmd->string, "r"); |
| 1028 | if (rfile) { |
| 1029 | char *line; |
| 1030 | |
Denis Vlasenko | 8ee649a | 2008-03-26 20:04:27 +0000 | [diff] [blame^] | 1031 | while ((line = xmalloc_fgetline(rfile)) |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1032 | != NULL) |
| 1033 | append(line); |
| 1034 | xprint_and_close_file(rfile); |
| 1035 | } |
| 1036 | |
| 1037 | break; |
| 1038 | } |
| 1039 | |
| 1040 | /* Write pattern space to file. */ |
| 1041 | case 'w': |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1042 | puts_maybe_newline( |
| 1043 | pattern_space, sed_cmd->sw_file, |
| 1044 | &sed_cmd->sw_last_char, last_gets_char); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1045 | break; |
| 1046 | |
| 1047 | /* Read next line from input */ |
| 1048 | case 'n': |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1049 | if (!G.be_quiet) |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1050 | sed_puts(pattern_space, last_gets_char); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1051 | if (next_line) { |
| 1052 | free(pattern_space); |
| 1053 | pattern_space = next_line; |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1054 | last_gets_char = next_gets_char; |
| 1055 | next_line = get_next_line(&next_gets_char); |
Denis Vlasenko | f39c7c0 | 2008-02-28 17:59:01 +0000 | [diff] [blame] | 1056 | substituted = 0; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1057 | linenum++; |
| 1058 | break; |
| 1059 | } |
| 1060 | /* fall through */ |
| 1061 | |
| 1062 | /* Quit. End of script, end of input. */ |
| 1063 | case 'q': |
| 1064 | /* Exit the outer while loop */ |
| 1065 | free(next_line); |
| 1066 | next_line = NULL; |
| 1067 | goto discard_commands; |
| 1068 | |
| 1069 | /* Append the next line to the current line */ |
| 1070 | case 'N': |
| 1071 | { |
| 1072 | int len; |
| 1073 | /* If no next line, jump to end of script and exit. */ |
| 1074 | if (next_line == NULL) { |
| 1075 | /* Jump to end of script and exit */ |
| 1076 | free(next_line); |
| 1077 | next_line = NULL; |
| 1078 | goto discard_line; |
| 1079 | /* append next_line, read new next_line. */ |
| 1080 | } |
| 1081 | len = strlen(pattern_space); |
| 1082 | pattern_space = realloc(pattern_space, len + strlen(next_line) + 2); |
| 1083 | pattern_space[len] = '\n'; |
| 1084 | strcpy(pattern_space + len+1, next_line); |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1085 | last_gets_char = next_gets_char; |
| 1086 | next_line = get_next_line(&next_gets_char); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1087 | linenum++; |
| 1088 | break; |
| 1089 | } |
| 1090 | |
| 1091 | /* Test/branch if substitution occurred */ |
| 1092 | case 't': |
| 1093 | if (!substituted) break; |
| 1094 | substituted = 0; |
| 1095 | /* Fall through */ |
| 1096 | /* Test/branch if substitution didn't occur */ |
| 1097 | case 'T': |
| 1098 | if (substituted) break; |
| 1099 | /* Fall through */ |
| 1100 | /* Branch to label */ |
| 1101 | case 'b': |
| 1102 | if (!sed_cmd->string) goto discard_commands; |
| 1103 | else sed_cmd = branch_to(sed_cmd->string); |
| 1104 | break; |
| 1105 | /* Transliterate characters */ |
| 1106 | case 'y': |
| 1107 | { |
| 1108 | int i, j; |
| 1109 | |
| 1110 | for (i = 0; pattern_space[i]; i++) { |
| 1111 | for (j = 0; sed_cmd->string[j]; j += 2) { |
| 1112 | if (pattern_space[i] == sed_cmd->string[j]) { |
| 1113 | pattern_space[i] = sed_cmd->string[j + 1]; |
| 1114 | break; |
| 1115 | } |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | break; |
| 1120 | } |
| 1121 | case 'g': /* Replace pattern space with hold space */ |
| 1122 | free(pattern_space); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1123 | pattern_space = xstrdup(G.hold_space ? G.hold_space : ""); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1124 | break; |
| 1125 | case 'G': /* Append newline and hold space to pattern space */ |
| 1126 | { |
| 1127 | int pattern_space_size = 2; |
| 1128 | int hold_space_size = 0; |
| 1129 | |
| 1130 | if (pattern_space) |
| 1131 | pattern_space_size += strlen(pattern_space); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1132 | if (G.hold_space) |
| 1133 | hold_space_size = strlen(G.hold_space); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1134 | pattern_space = xrealloc(pattern_space, |
| 1135 | pattern_space_size + hold_space_size); |
| 1136 | if (pattern_space_size == 2) |
| 1137 | pattern_space[0] = 0; |
| 1138 | strcat(pattern_space, "\n"); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1139 | if (G.hold_space) |
| 1140 | strcat(pattern_space, G.hold_space); |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1141 | last_gets_char = '\n'; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1142 | |
| 1143 | break; |
| 1144 | } |
| 1145 | case 'h': /* Replace hold space with pattern space */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1146 | free(G.hold_space); |
| 1147 | G.hold_space = xstrdup(pattern_space); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1148 | break; |
| 1149 | case 'H': /* Append newline and pattern space to hold space */ |
| 1150 | { |
| 1151 | int hold_space_size = 2; |
| 1152 | int pattern_space_size = 0; |
| 1153 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1154 | if (G.hold_space) |
| 1155 | hold_space_size += strlen(G.hold_space); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1156 | if (pattern_space) |
| 1157 | pattern_space_size = strlen(pattern_space); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1158 | G.hold_space = xrealloc(G.hold_space, |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1159 | hold_space_size + pattern_space_size); |
| 1160 | |
| 1161 | if (hold_space_size == 2) |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1162 | *G.hold_space = 0; |
| 1163 | strcat(G.hold_space, "\n"); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1164 | if (pattern_space) |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1165 | strcat(G.hold_space, pattern_space); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1166 | |
| 1167 | break; |
| 1168 | } |
| 1169 | case 'x': /* Exchange hold and pattern space */ |
| 1170 | { |
| 1171 | char *tmp = pattern_space; |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1172 | pattern_space = G.hold_space ? : xzalloc(1); |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1173 | last_gets_char = '\n'; |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1174 | G.hold_space = tmp; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1175 | break; |
| 1176 | } |
| 1177 | } |
| 1178 | } |
Glenn L McGrath | aa5a602 | 2003-10-01 03:06:16 +0000 | [diff] [blame] | 1179 | } |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1180 | |
| 1181 | /* |
| 1182 | * exit point from sedding... |
| 1183 | */ |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 1184 | discard_commands: |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1185 | /* we will print the line unless we were told to be quiet ('-n') |
| 1186 | or if the line was suppressed (ala 'd'elete) */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1187 | if (!G.be_quiet) |
Denis Vlasenko | fe7a9f1 | 2007-01-29 14:31:47 +0000 | [diff] [blame] | 1188 | sed_puts(pattern_space, last_gets_char); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1189 | |
| 1190 | /* Delete and such jump here. */ |
Denis Vlasenko | 826c85f | 2007-01-28 23:26:15 +0000 | [diff] [blame] | 1191 | discard_line: |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1192 | flush_append(); |
| 1193 | free(pattern_space); |
| 1194 | |
| 1195 | goto again; |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 1196 | } |
| 1197 | |
Glenn L McGrath | 42c2573 | 2003-10-04 05:27:56 +0000 | [diff] [blame] | 1198 | /* It is possible to have a command line argument with embedded |
Denis Vlasenko | 4b0bb9e | 2007-03-16 23:36:58 +0000 | [diff] [blame] | 1199 | * newlines. This counts as multiple command lines. |
| 1200 | * However, newline can be escaped: 's/e/z\<newline>z/' |
| 1201 | * We check for this. |
| 1202 | */ |
Glenn L McGrath | 42c2573 | 2003-10-04 05:27:56 +0000 | [diff] [blame] | 1203 | |
| 1204 | static void add_cmd_block(char *cmdstr) |
| 1205 | { |
Denis Vlasenko | 4b0bb9e | 2007-03-16 23:36:58 +0000 | [diff] [blame] | 1206 | char *sv, *eol; |
Glenn L McGrath | 42c2573 | 2003-10-04 05:27:56 +0000 | [diff] [blame] | 1207 | |
Denis Vlasenko | 4b0bb9e | 2007-03-16 23:36:58 +0000 | [diff] [blame] | 1208 | cmdstr = sv = xstrdup(cmdstr); |
| 1209 | do { |
| 1210 | eol = strchr(cmdstr, '\n'); |
| 1211 | next: |
| 1212 | if (eol) { |
| 1213 | /* Count preceding slashes */ |
| 1214 | int slashes = 0; |
| 1215 | char *sl = eol; |
| 1216 | |
| 1217 | while (sl != cmdstr && *--sl == '\\') |
| 1218 | slashes++; |
| 1219 | /* Odd number of preceding slashes - newline is escaped */ |
| 1220 | if (slashes & 1) { |
| 1221 | strcpy(eol-1, eol); |
| 1222 | eol = strchr(eol, '\n'); |
| 1223 | goto next; |
| 1224 | } |
| 1225 | *eol = '\0'; |
| 1226 | } |
| 1227 | add_cmd(cmdstr); |
| 1228 | cmdstr = eol + 1; |
| 1229 | } while (eol); |
| 1230 | free(sv); |
Glenn L McGrath | 42c2573 | 2003-10-04 05:27:56 +0000 | [diff] [blame] | 1231 | } |
| 1232 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 1233 | int sed_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Denis Vlasenko | 62a90cd | 2008-03-17 09:07:36 +0000 | [diff] [blame] | 1234 | int sed_main(int argc ATTRIBUTE_UNUSED, char **argv) |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 1235 | { |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1236 | enum { |
| 1237 | OPT_in_place = 1 << 0, |
| 1238 | }; |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame] | 1239 | unsigned opt; |
Denis Vlasenko | b97c984 | 2006-10-01 21:05:12 +0000 | [diff] [blame] | 1240 | llist_t *opt_e, *opt_f; |
| 1241 | int status = EXIT_SUCCESS; |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 1242 | |
Denis Vlasenko | 74324c8 | 2007-06-04 10:16:52 +0000 | [diff] [blame] | 1243 | INIT_G(); |
Rob Landley | e3f5a3f | 2006-05-09 03:53:55 +0000 | [diff] [blame] | 1244 | |
Mark Whitley | 858c1ad | 2000-07-11 21:38:47 +0000 | [diff] [blame] | 1245 | /* destroy command strings on exit */ |
Rob Landley | 0b65628 | 2006-05-08 22:17:23 +0000 | [diff] [blame] | 1246 | if (ENABLE_FEATURE_CLEAN_UP) atexit(sed_free_and_close_stuff); |
Mark Whitley | 858c1ad | 2000-07-11 21:38:47 +0000 | [diff] [blame] | 1247 | |
Rob Landley | fae1dc8 | 2005-11-20 07:44:35 +0000 | [diff] [blame] | 1248 | /* Lie to autoconf when it starts asking stupid questions. */ |
Denis Vlasenko | 62a90cd | 2008-03-17 09:07:36 +0000 | [diff] [blame] | 1249 | if (argv[1] && !strcmp(argv[1], "--version")) { |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1250 | puts("This is not GNU sed version 4.0"); |
| 1251 | return 0; |
Eric Andersen | c06f568 | 2004-02-04 10:57:46 +0000 | [diff] [blame] | 1252 | } |
Eric Andersen | c06f568 | 2004-02-04 10:57:46 +0000 | [diff] [blame] | 1253 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 1254 | /* do normal option parsing */ |
Denis Vlasenko | b97c984 | 2006-10-01 21:05:12 +0000 | [diff] [blame] | 1255 | opt_e = opt_f = NULL; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1256 | opt_complementary = "e::f::" /* can occur multiple times */ |
| 1257 | "nn"; /* count -n */ |
Denis Vlasenko | fe7cd64 | 2007-08-18 15:32:12 +0000 | [diff] [blame] | 1258 | opt = getopt32(argv, "irne:f:", &opt_e, &opt_f, |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1259 | &G.be_quiet); /* counter for -n */ |
Denis Vlasenko | 62a90cd | 2008-03-17 09:07:36 +0000 | [diff] [blame] | 1260 | //argc -= optind; |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1261 | argv += optind; |
| 1262 | if (opt & OPT_in_place) { // -i |
Denis Vlasenko | 750fc6d | 2006-09-22 08:56:03 +0000 | [diff] [blame] | 1263 | atexit(cleanup_outname); |
| 1264 | } |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1265 | if (opt & 0x2) G.regex_type |= REG_EXTENDED; // -r |
| 1266 | //if (opt & 0x4) G.be_quiet++; // -n |
Denis Vlasenko | 945bd3d | 2007-04-12 21:20:25 +0000 | [diff] [blame] | 1267 | while (opt_e) { // -e |
| 1268 | add_cmd_block(opt_e->data); |
| 1269 | opt_e = opt_e->link; |
| 1270 | /* we leak opt_e here... */ |
Denis Vlasenko | 750fc6d | 2006-09-22 08:56:03 +0000 | [diff] [blame] | 1271 | } |
Denis Vlasenko | 945bd3d | 2007-04-12 21:20:25 +0000 | [diff] [blame] | 1272 | while (opt_f) { // -f |
| 1273 | char *line; |
| 1274 | FILE *cmdfile; |
| 1275 | cmdfile = xfopen(opt_f->data, "r"); |
Denis Vlasenko | 8ee649a | 2008-03-26 20:04:27 +0000 | [diff] [blame^] | 1276 | while ((line = xmalloc_fgetline(cmdfile)) != NULL) { |
Denis Vlasenko | 945bd3d | 2007-04-12 21:20:25 +0000 | [diff] [blame] | 1277 | add_cmd(line); |
| 1278 | free(line); |
| 1279 | } |
| 1280 | fclose(cmdfile); |
| 1281 | opt_f = opt_f->link; |
| 1282 | /* we leak opt_f here... */ |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 1283 | } |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1284 | /* if we didn't get a pattern from -e or -f, use argv[0] */ |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 1285 | if (!(opt & 0x18)) { |
Denis Vlasenko | 62a90cd | 2008-03-17 09:07:36 +0000 | [diff] [blame] | 1286 | if (!*argv) |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 1287 | bb_show_usage(); |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1288 | add_cmd_block(*argv++); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 1289 | } |
Glenn L McGrath | 42c2573 | 2003-10-04 05:27:56 +0000 | [diff] [blame] | 1290 | /* Flush any unfinished commands. */ |
| 1291 | add_cmd(""); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 1292 | |
Rob Landley | 53302f8 | 2004-02-18 09:54:15 +0000 | [diff] [blame] | 1293 | /* By default, we write to stdout */ |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1294 | G.nonstdout = stdout; |
Rob Landley | 53302f8 | 2004-02-18 09:54:15 +0000 | [diff] [blame] | 1295 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1296 | /* argv[0..(argc-1)] should be names of file to process. If no |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 1297 | * files were specified or '-' was specified, take input from stdin. |
| 1298 | * Otherwise, we process all the files specified. */ |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1299 | if (argv[0] == NULL) { |
| 1300 | if (opt & OPT_in_place) |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 1301 | bb_error_msg_and_die(bb_msg_requires_arg, "-i"); |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 1302 | add_input_file(stdin); |
| 1303 | process_files(); |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 1304 | } else { |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 1305 | int i; |
| 1306 | FILE *file; |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 1307 | |
Denis Vlasenko | 62a90cd | 2008-03-17 09:07:36 +0000 | [diff] [blame] | 1308 | for (i = 0; argv[i]; i++) { |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 1309 | struct stat statbuf; |
| 1310 | int nonstdoutfd; |
| 1311 | |
Denis Vlasenko | 9f73944 | 2006-12-16 23:49:13 +0000 | [diff] [blame] | 1312 | if (LONE_DASH(argv[i]) && !(opt & OPT_in_place)) { |
Rob Landley | dcc2866 | 2004-11-25 07:21:47 +0000 | [diff] [blame] | 1313 | add_input_file(stdin); |
| 1314 | process_files(); |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 1315 | continue; |
Glenn L McGrath | 8aac05b | 2003-09-14 04:06:12 +0000 | [diff] [blame] | 1316 | } |
Denis Vlasenko | ddec5af | 2006-10-26 23:25:17 +0000 | [diff] [blame] | 1317 | file = fopen_or_warn(argv[i], "r"); |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 1318 | if (!file) { |
| 1319 | status = EXIT_FAILURE; |
| 1320 | continue; |
| 1321 | } |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1322 | if (!(opt & OPT_in_place)) { |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 1323 | add_input_file(file); |
| 1324 | continue; |
| 1325 | } |
| 1326 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1327 | G.outname = xasprintf("%sXXXXXX", argv[i]); |
| 1328 | nonstdoutfd = mkstemp(G.outname); |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 1329 | if (-1 == nonstdoutfd) |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1330 | bb_perror_msg_and_die("cannot create temp file %s", G.outname); |
| 1331 | G.nonstdout = fdopen(nonstdoutfd, "w"); |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 1332 | |
| 1333 | /* Set permissions of output file */ |
| 1334 | |
Denis Vlasenko | 2f8f71b | 2006-12-10 02:09:12 +0000 | [diff] [blame] | 1335 | fstat(fileno(file), &statbuf); |
| 1336 | fchmod(nonstdoutfd, statbuf.st_mode); |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 1337 | add_input_file(file); |
| 1338 | process_files(); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1339 | fclose(G.nonstdout); |
Denis Vlasenko | d18a3a2 | 2006-10-25 12:46:03 +0000 | [diff] [blame] | 1340 | |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1341 | G.nonstdout = stdout; |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 1342 | /* unlink(argv[i]); */ |
Denis Vlasenko | cb448fe | 2008-02-17 14:28:53 +0000 | [diff] [blame] | 1343 | xrename(G.outname, argv[i]); |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1344 | free(G.outname); |
Denis Vlasenko | 4027664 | 2007-11-13 16:48:10 +0000 | [diff] [blame] | 1345 | G.outname = NULL; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 1346 | } |
Denis Vlasenko | 17a1526 | 2007-03-26 20:48:46 +0000 | [diff] [blame] | 1347 | if (G.input_file_count > G.current_input_file) |
Denis Vlasenko | 8077850 | 2006-10-25 12:46:46 +0000 | [diff] [blame] | 1348 | process_files(); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 1349 | } |
Glenn L McGrath | 8d6395d | 2003-04-08 11:56:11 +0000 | [diff] [blame] | 1350 | |
Matt Kraai | a5f09c6 | 2001-11-12 16:44:55 +0000 | [diff] [blame] | 1351 | return status; |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 1352 | } |