Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 1 | /* |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 2 | * sed.c - very minimalist version of sed |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 3 | * |
Eric Andersen | 8ec10a9 | 2001-01-27 09:33:39 +0000 | [diff] [blame^] | 4 | * Copyright (C) 1999,2000,2001 by Lineo, inc. |
Mark Whitley | 6c6ea6c | 2001-01-04 22:21:13 +0000 | [diff] [blame] | 5 | * Written by Mark Whitley <markw@lineo.com>, <markw@codepoet.org> |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 6 | * |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 23 | /* |
| 24 | Supported features and commands in this version of sed: |
| 25 | |
| 26 | - comments ('#') |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 27 | - address matching: num|/matchstr/[,num|/matchstr/|$]command |
| 28 | - commands: (p)rint, (d)elete, (s)ubstitue (with g & I flags) |
| 29 | - edit commands: (a)ppend, (i)nsert, (c)hange |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 30 | - backreferences in substitution expressions (\1, \2...\9) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 31 | |
| 32 | (Note: Specifying an address (range) to match is *optional*; commands |
| 33 | default to the whole pattern space if no specific address match was |
| 34 | requested.) |
| 35 | |
| 36 | Unsupported features: |
| 37 | |
| 38 | - transliteration (y/source-chars/dest-chars/) (use 'tr') |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 39 | - no pattern space hold space storing / swapping (x, etc.) |
| 40 | - no labels / branching (: label, b, t, and friends) |
| 41 | - and lots, lots more. |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 42 | */ |
| 43 | |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 44 | #include <stdio.h> |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 45 | #include <unistd.h> /* for getopt() */ |
| 46 | #include <regex.h> |
| 47 | #include <string.h> /* for strdup() */ |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 48 | #include <errno.h> |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 49 | #include <ctype.h> /* for isspace() */ |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 50 | #include <stdlib.h> |
Eric Andersen | 3570a34 | 2000-09-25 21:45:58 +0000 | [diff] [blame] | 51 | #include "busybox.h" |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 52 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 53 | /* externs */ |
Eric Andersen | ed3ef50 | 2001-01-27 08:24:39 +0000 | [diff] [blame] | 54 | extern void xregcomp(regex_t *preg, const char *regex, int cflags); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 55 | extern int optind; /* in unistd.h */ |
| 56 | extern char *optarg; /* ditto */ |
| 57 | |
| 58 | /* options */ |
| 59 | static int be_quiet = 0; |
| 60 | |
Mark Whitley | 0e4cec0 | 2000-08-21 21:29:20 +0000 | [diff] [blame] | 61 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 62 | struct sed_cmd { |
| 63 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 64 | |
| 65 | /* GENERAL FIELDS */ |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 66 | char delimiter; /* The delimiter used to separate regexps */ |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 67 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 68 | /* address storage */ |
| 69 | int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */ |
| 70 | int end_line; /* 'sed 1,3p' 0 == no end line, use only beginning. -1 == $ */ |
| 71 | regex_t *beg_match; /* sed -e '/match/cmd' */ |
| 72 | regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */ |
| 73 | |
| 74 | /* the command */ |
| 75 | char cmd; /* p,d,s (add more at your leisure :-) */ |
| 76 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 77 | |
| 78 | /* SUBSTITUTION COMMAND SPECIFIC FIELDS */ |
| 79 | |
| 80 | /* sed -e 's/sub_match/replace/' */ |
| 81 | regex_t *sub_match; |
| 82 | char *replace; |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 83 | unsigned int num_backrefs:4; /* how many back references (\1..\9) */ |
| 84 | /* Note: GNU/POSIX sed does not save more than nine backrefs, so |
| 85 | * we only use 4 bits to hold the number */ |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 86 | unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */ |
| 87 | unsigned int sub_p:2; /* sed -e 's/foo/bar/p' (print substitution) */ |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 88 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 89 | |
| 90 | /* EDIT COMMAND (a,i,c) SPEICIFIC FIELDS */ |
| 91 | |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 92 | char *editline; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 93 | }; |
| 94 | |
| 95 | /* globals */ |
| 96 | static struct sed_cmd *sed_cmds = NULL; /* growable arrary holding a sequence of sed cmds */ |
| 97 | static int ncmds = 0; /* number of sed commands */ |
| 98 | |
| 99 | /*static char *cur_file = NULL;*/ /* file currently being processed XXX: do I need this? */ |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 100 | |
Eric Andersen | b040d4f | 2000-07-25 18:01:20 +0000 | [diff] [blame] | 101 | #ifdef BB_FEATURE_CLEAN_UP |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 102 | static void destroy_cmd_strs() |
| 103 | { |
| 104 | if (sed_cmds == NULL) |
| 105 | return; |
| 106 | |
| 107 | /* destroy all the elements in the array */ |
| 108 | while (--ncmds >= 0) { |
| 109 | |
| 110 | if (sed_cmds[ncmds].beg_match) { |
| 111 | regfree(sed_cmds[ncmds].beg_match); |
| 112 | free(sed_cmds[ncmds].beg_match); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 113 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 114 | if (sed_cmds[ncmds].end_match) { |
| 115 | regfree(sed_cmds[ncmds].end_match); |
| 116 | free(sed_cmds[ncmds].end_match); |
| 117 | } |
| 118 | if (sed_cmds[ncmds].sub_match) { |
| 119 | regfree(sed_cmds[ncmds].sub_match); |
| 120 | free(sed_cmds[ncmds].sub_match); |
| 121 | } |
| 122 | if (sed_cmds[ncmds].replace) |
| 123 | free(sed_cmds[ncmds].replace); |
| 124 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 125 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 126 | /* destroy the array */ |
| 127 | free(sed_cmds); |
| 128 | sed_cmds = NULL; |
| 129 | } |
Mark Whitley | c41e8c8 | 2000-07-12 23:35:21 +0000 | [diff] [blame] | 130 | #endif |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 131 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 132 | |
| 133 | /* |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 134 | * index_of_next_unescaped_regexp_delim - walks left to right through a string |
| 135 | * beginning at a specified index and returns the index of the next regular |
| 136 | * expression delimiter (typically a forward * slash ('/')) not preceeded by |
| 137 | * a backslash ('\'). |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 138 | */ |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 139 | static int index_of_next_unescaped_regexp_delim(struct sed_cmd *sed_cmd, const char *str, int idx) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 140 | { |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 141 | for ( ; str[idx]; idx++) { |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 142 | if (str[idx] == sed_cmd->delimiter && str[idx-1] != '\\') |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 143 | return idx; |
| 144 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 145 | |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 146 | /* if we make it to here, we've hit the end of the string */ |
| 147 | return -1; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | /* |
| 151 | * returns the index in the string just past where the address ends. |
| 152 | */ |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 153 | static int get_address(struct sed_cmd *sed_cmd, const char *str, int *line, regex_t **regex) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 154 | { |
| 155 | char *my_str = strdup(str); |
| 156 | int idx = 0; |
| 157 | |
| 158 | if (isdigit(my_str[idx])) { |
| 159 | do { |
| 160 | idx++; |
| 161 | } while (isdigit(my_str[idx])); |
| 162 | my_str[idx] = 0; |
| 163 | *line = atoi(my_str); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 164 | } |
| 165 | else if (my_str[idx] == '$') { |
| 166 | *line = -1; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 167 | idx++; |
| 168 | } |
| 169 | else if (my_str[idx] == '/') { |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 170 | idx = index_of_next_unescaped_regexp_delim(sed_cmd, my_str, ++idx); |
Mark Whitley | df5f6ba | 2000-07-11 16:53:56 +0000 | [diff] [blame] | 171 | if (idx == -1) |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 172 | error_msg_and_die("unterminated match expression\n"); |
Mark Whitley | df5f6ba | 2000-07-11 16:53:56 +0000 | [diff] [blame] | 173 | my_str[idx] = '\0'; |
| 174 | *regex = (regex_t *)xmalloc(sizeof(regex_t)); |
Mark Whitley | eb69ead | 2000-11-03 20:23:49 +0000 | [diff] [blame] | 175 | xregcomp(*regex, my_str+1, 0); |
Mark Whitley | 496e33f | 2000-07-13 22:52:02 +0000 | [diff] [blame] | 176 | idx++; /* so it points to the next character after the last '/' */ |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 177 | } |
| 178 | else { |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 179 | error_msg("get_address: no address found in string\n" |
Matt Kraai | d537a95 | 2000-07-14 01:51:25 +0000 | [diff] [blame] | 180 | "\t(you probably didn't check the string you passed me)\n"); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 181 | idx = -1; |
| 182 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 183 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 184 | free(my_str); |
| 185 | return idx; |
| 186 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 187 | |
Mark Whitley | df5f6ba | 2000-07-11 16:53:56 +0000 | [diff] [blame] | 188 | static char *strdup_substr(const char *str, int start, int end) |
| 189 | { |
| 190 | int size = end - start + 1; |
| 191 | char *newstr = xmalloc(size); |
| 192 | memcpy(newstr, str+start, size-1); |
| 193 | newstr[size-1] = '\0'; |
| 194 | return newstr; |
| 195 | } |
| 196 | |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 197 | static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr) |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 198 | { |
| 199 | int oldidx, cflags = REG_NEWLINE; |
| 200 | char *match; |
| 201 | int idx = 0; |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 202 | int j; |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 203 | |
| 204 | /* |
| 205 | * the string that gets passed to this function should look like this: |
Mark Whitley | 0e4cec0 | 2000-08-21 21:29:20 +0000 | [diff] [blame] | 206 | * s/match/replace/gIp |
| 207 | * || | ||| |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 208 | * mandatory optional |
| 209 | * |
| 210 | * (all three of the '/' slashes are mandatory) |
| 211 | */ |
| 212 | |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 213 | /* verify that the 's' is followed by something. That something |
| 214 | * (typically a 'slash') is now our regexp delimiter... */ |
| 215 | if (!substr[++idx]) |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 216 | error_msg_and_die("bad format in substitution expression\n"); |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 217 | else |
| 218 | sed_cmd->delimiter=substr[idx]; |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 219 | |
| 220 | /* save the match string */ |
| 221 | oldidx = idx+1; |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 222 | idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx); |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 223 | if (idx == -1) |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 224 | error_msg_and_die("bad format in substitution expression\n"); |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 225 | match = strdup_substr(substr, oldidx, idx); |
| 226 | |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 227 | /* determine the number of back references in the match string */ |
| 228 | /* Note: we compute this here rather than in the do_subst_command() |
| 229 | * function to save processor time, at the expense of a little more memory |
| 230 | * (4 bits) per sed_cmd */ |
| 231 | |
| 232 | /* sed_cmd->num_backrefs = 0; */ /* XXX: not needed? --apparently not */ |
| 233 | for (j = 0; match[j]; j++) { |
| 234 | /* GNU/POSIX sed does not save more than nine backrefs */ |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 235 | if (match[j] == '\\' && match[j+1] == '(' && sed_cmd->num_backrefs <= 9) |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 236 | sed_cmd->num_backrefs++; |
| 237 | } |
| 238 | |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 239 | /* save the replacement string */ |
| 240 | oldidx = idx+1; |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 241 | idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx); |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 242 | if (idx == -1) |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 243 | error_msg_and_die("bad format in substitution expression\n"); |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 244 | sed_cmd->replace = strdup_substr(substr, oldidx, idx); |
| 245 | |
| 246 | /* process the flags */ |
| 247 | while (substr[++idx]) { |
| 248 | switch (substr[idx]) { |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 249 | case 'g': |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 250 | sed_cmd->sub_g = 1; |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 251 | break; |
| 252 | case 'I': |
| 253 | cflags |= REG_ICASE; |
| 254 | break; |
Mark Whitley | 0e4cec0 | 2000-08-21 21:29:20 +0000 | [diff] [blame] | 255 | case 'p': |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 256 | sed_cmd->sub_p = 1; |
Mark Whitley | 0e4cec0 | 2000-08-21 21:29:20 +0000 | [diff] [blame] | 257 | break; |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 258 | default: |
| 259 | /* any whitespace or semicolon trailing after a s/// is ok */ |
| 260 | if (strchr("; \t\v\n\r", substr[idx])) |
| 261 | goto out; |
| 262 | /* else */ |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 263 | error_msg_and_die("bad option in substitution expression\n"); |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 264 | } |
| 265 | } |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 266 | |
| 267 | out: |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 268 | /* compile the match string into a regex */ |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 269 | sed_cmd->sub_match = (regex_t *)xmalloc(sizeof(regex_t)); |
| 270 | xregcomp(sed_cmd->sub_match, match, cflags); |
| 271 | free(match); |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 272 | |
| 273 | return idx; |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 274 | } |
| 275 | |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 276 | static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr) |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 277 | { |
| 278 | int idx = 0; |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 279 | int slashes_eaten = 0; |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 280 | char *ptr; /* shorthand */ |
| 281 | |
| 282 | /* |
| 283 | * the string that gets passed to this function should look like this: |
| 284 | * |
| 285 | * need one of these |
| 286 | * | |
| 287 | * | this backslash (immediately following the edit command) is mandatory |
| 288 | * | | |
| 289 | * [aic]\ |
| 290 | * TEXT1\ |
| 291 | * TEXT2\ |
| 292 | * TEXTN |
| 293 | * |
| 294 | * as soon as we hit a TEXT line that has no trailing '\', we're done. |
| 295 | * this means a command like: |
| 296 | * |
| 297 | * i\ |
| 298 | * INSERTME |
| 299 | * |
| 300 | * is a-ok. |
| 301 | * |
| 302 | */ |
| 303 | |
| 304 | if (editstr[1] != '\\' && (editstr[2] != '\n' || editstr[2] != '\r')) |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 305 | error_msg_and_die("bad format in edit expression\n"); |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 306 | |
| 307 | /* store the edit line text */ |
Mark Whitley | 34623db | 2000-07-14 00:49:59 +0000 | [diff] [blame] | 308 | /* make editline big enough to accomodate the extra '\n' we will tack on |
| 309 | * to the end */ |
| 310 | sed_cmd->editline = xmalloc(strlen(&editstr[3]) + 2); |
| 311 | strcpy(sed_cmd->editline, &editstr[3]); |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 312 | ptr = sed_cmd->editline; |
| 313 | |
| 314 | /* now we need to go through * and: s/\\[\r\n]$/\n/g on the edit line */ |
| 315 | while (ptr[idx]) { |
| 316 | while (ptr[idx] != '\\' && (ptr[idx+1] != '\n' || ptr[idx+1] != '\r')) { |
| 317 | idx++; |
| 318 | if (!ptr[idx]) { |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 319 | goto out; |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 320 | } |
| 321 | } |
| 322 | /* move the newline over the '\' before it (effectively eats the '\') */ |
| 323 | memmove(&ptr[idx], &ptr[idx+1], strlen(&ptr[idx+1])); |
| 324 | ptr[strlen(ptr)-1] = 0; |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 325 | slashes_eaten++; |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 326 | /* substitue \r for \n if needed */ |
| 327 | if (ptr[idx] == '\r') |
| 328 | ptr[idx] = '\n'; |
| 329 | } |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 330 | |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 331 | out: |
| 332 | ptr[idx] = '\n'; |
| 333 | ptr[idx+1] = 0; |
| 334 | |
| 335 | /* this accounts for discrepancies between the modified string and the |
| 336 | * original string passed in to this function */ |
| 337 | idx += slashes_eaten; |
| 338 | |
| 339 | /* this accounts for the fact that A) we started at index 3, not at index |
| 340 | * 0 and B) that we added an extra '\n' at the end (if you think the next |
| 341 | * line should read 'idx += 4' remember, arrays are zero-based) */ |
| 342 | |
| 343 | idx += 3; |
| 344 | |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 345 | return idx; |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 346 | } |
| 347 | |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 348 | static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 349 | { |
| 350 | int idx = 0; |
| 351 | |
| 352 | /* parse the command |
| 353 | * format is: [addr][,addr]cmd |
| 354 | * |----||-----||-| |
| 355 | * part1 part2 part3 |
| 356 | */ |
| 357 | |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 358 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 359 | /* first part (if present) is an address: either a number or a /regex/ */ |
| 360 | if (isdigit(cmdstr[idx]) || cmdstr[idx] == '/') |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 361 | idx = get_address(sed_cmd, cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 362 | |
| 363 | /* second part (if present) will begin with a comma */ |
| 364 | if (cmdstr[idx] == ',') |
Eric Andersen | 28b3c53 | 2001-01-02 11:01:31 +0000 | [diff] [blame] | 365 | idx += get_address(sed_cmd, &cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 366 | |
| 367 | /* last part (mandatory) will be a command */ |
| 368 | if (cmdstr[idx] == '\0') |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 369 | error_msg_and_die("missing command\n"); |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 370 | if (!strchr("pdsaic", cmdstr[idx])) /* <-- XXX add new commands here */ |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 371 | error_msg_and_die("invalid command\n"); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 372 | sed_cmd->cmd = cmdstr[idx]; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 373 | |
Mark Whitley | 06f3529 | 2000-07-13 19:58:04 +0000 | [diff] [blame] | 374 | /* special-case handling for (s)ubstitution */ |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 375 | if (sed_cmd->cmd == 's') { |
| 376 | idx += parse_subst_cmd(sed_cmd, &cmdstr[idx]); |
| 377 | } |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 378 | /* special-case handling for (a)ppend, (i)nsert, and (c)hange */ |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 379 | else if (strchr("aic", cmdstr[idx])) { |
Mark Whitley | 0200834 | 2000-07-14 00:13:52 +0000 | [diff] [blame] | 380 | if (sed_cmd->end_line || sed_cmd->end_match) |
Mark Whitley | f57c944 | 2000-12-07 19:56:48 +0000 | [diff] [blame] | 381 | error_msg_and_die("only a beginning address can be specified for edit commands\n"); |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 382 | idx += parse_edit_cmd(sed_cmd, &cmdstr[idx]); |
Mark Whitley | 0200834 | 2000-07-14 00:13:52 +0000 | [diff] [blame] | 383 | } |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 384 | /* if it was a single-letter command (such as 'p' or 'd') we need to |
| 385 | * increment the index past that command */ |
| 386 | else |
| 387 | idx++; |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 388 | |
| 389 | /* give back whatever's left over */ |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 390 | return (char *)&cmdstr[idx]; |
Eric Andersen | 50d6360 | 1999-11-09 01:47:36 +0000 | [diff] [blame] | 391 | } |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 392 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 393 | static void add_cmd_str(const char *cmdstr) |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 394 | { |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 395 | char *mystr = (char *)cmdstr; |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 396 | |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 397 | do { |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 398 | |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 399 | /* trim leading whitespace and semicolons */ |
| 400 | memmove(mystr, &mystr[strspn(mystr, "; \n\r\t\v")], strlen(mystr)); |
| 401 | /* if we ate the whole thing, that means there was just trailing |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 402 | * whitespace or a final / no-op semicolon. either way, get out */ |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 403 | if (strlen(mystr) == 0) |
| 404 | return; |
| 405 | /* if this is a comment, jump past it and keep going */ |
| 406 | if (mystr[0] == '#') { |
| 407 | mystr = strpbrk(mystr, ";\n\r"); |
| 408 | continue; |
| 409 | } |
| 410 | /* grow the array */ |
Matt Kraai | 322ae93 | 2000-09-13 02:46:14 +0000 | [diff] [blame] | 411 | sed_cmds = xrealloc(sed_cmds, sizeof(struct sed_cmd) * (++ncmds)); |
Mark Whitley | 70705d7 | 2000-07-14 19:06:30 +0000 | [diff] [blame] | 412 | /* zero new element */ |
| 413 | memset(&sed_cmds[ncmds-1], 0, sizeof(struct sed_cmd)); |
| 414 | /* load command string into new array element, get remainder */ |
| 415 | mystr = parse_cmd_str(&sed_cmds[ncmds-1], mystr); |
| 416 | |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 417 | } while (mystr && strlen(mystr)); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 418 | } |
| 419 | |
| 420 | |
| 421 | static void load_cmd_file(char *filename) |
| 422 | { |
| 423 | FILE *cmdfile; |
| 424 | char *line; |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 425 | char *nextline; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 426 | |
Matt Kraai | bbaef66 | 2000-09-27 02:43:35 +0000 | [diff] [blame] | 427 | cmdfile = xfopen(filename, "r"); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 428 | |
| 429 | while ((line = get_line_from_file(cmdfile)) != NULL) { |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 430 | /* if a line ends with '\' it needs the next line appended to it */ |
| 431 | while (line[strlen(line)-2] == '\\' && |
| 432 | (nextline = get_line_from_file(cmdfile)) != NULL) { |
Matt Kraai | 322ae93 | 2000-09-13 02:46:14 +0000 | [diff] [blame] | 433 | line = xrealloc(line, strlen(line) + strlen(nextline) + 1); |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 434 | strcat(line, nextline); |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 435 | free(nextline); |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 436 | } |
Mark Whitley | 464c5de | 2000-07-14 23:24:00 +0000 | [diff] [blame] | 437 | /* eat trailing newline (if any) --if I don't do this, edit commands |
| 438 | * (aic) will print an extra newline */ |
| 439 | if (line[strlen(line)-1] == '\n') |
| 440 | line[strlen(line)-1] = 0; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 441 | add_cmd_str(line); |
| 442 | free(line); |
| 443 | } |
| 444 | } |
| 445 | |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 446 | static void print_subst_w_backrefs(const char *line, const char *replace, regmatch_t *regmatch) |
| 447 | { |
| 448 | int i; |
| 449 | |
| 450 | /* go through the replacement string */ |
| 451 | for (i = 0; replace[i]; i++) { |
| 452 | /* if we find a backreference (\1, \2, etc.) print the backref'ed * text */ |
| 453 | if (replace[i] == '\\' && isdigit(replace[i+1])) { |
| 454 | int j; |
| 455 | char tmpstr[2]; |
| 456 | int backref; |
| 457 | ++i; /* i now indexes the backref number, instead of the leading slash */ |
| 458 | tmpstr[0] = replace[i]; |
| 459 | tmpstr[1] = 0; |
| 460 | backref = atoi(tmpstr); |
| 461 | /* print out the text held in regmatch[backref] */ |
| 462 | for (j = regmatch[backref].rm_so; j < regmatch[backref].rm_eo; j++) |
| 463 | fputc(line[j], stdout); |
| 464 | } |
| 465 | |
Mark Whitley | 83e85f6 | 2000-07-25 20:48:44 +0000 | [diff] [blame] | 466 | /* if we find a backslash escaped character, print the character */ |
| 467 | else if (replace[i] == '\\') { |
| 468 | ++i; |
| 469 | fputc(replace[i], stdout); |
| 470 | } |
| 471 | |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 472 | /* if we find an unescaped '&' print out the whole matched text. |
| 473 | * fortunately, regmatch[0] contains the indicies to the whole matched |
| 474 | * expression (kinda seems like it was designed for just such a |
| 475 | * purpose...) */ |
| 476 | else if (replace[i] == '&' && replace[i-1] != '\\') { |
| 477 | int j; |
| 478 | for (j = regmatch[0].rm_so; j < regmatch[0].rm_eo; j++) |
| 479 | fputc(line[j], stdout); |
| 480 | } |
| 481 | /* nothing special, just print this char of the replacement string to stdout */ |
| 482 | else |
| 483 | fputc(replace[i], stdout); |
| 484 | } |
| 485 | } |
| 486 | |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 487 | static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line) |
| 488 | { |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 489 | char *hackline = (char *)line; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 490 | int altered = 0; |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 491 | regmatch_t *regmatch = NULL; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 492 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 493 | /* we only proceed if the substitution 'search' expression matches */ |
| 494 | if (regexec(sed_cmd->sub_match, line, 0, NULL, 0) == REG_NOMATCH) |
| 495 | return 0; |
| 496 | |
| 497 | /* whaddaya know, it matched. get the number of back references */ |
| 498 | regmatch = xmalloc(sizeof(regmatch_t) * (sed_cmd->num_backrefs+1)); |
| 499 | |
| 500 | /* and now, as long as we've got a line to try matching and if we can match |
| 501 | * the search string, we make substitutions */ |
| 502 | while (*hackline && (regexec(sed_cmd->sub_match, hackline, |
| 503 | sed_cmd->num_backrefs+1, regmatch, 0) == 0) ) { |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 504 | int i; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 505 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 506 | /* print everything before the match */ |
| 507 | for (i = 0; i < regmatch[0].rm_so; i++) |
| 508 | fputc(hackline[i], stdout); |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 509 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 510 | /* then print the substitution string */ |
| 511 | print_subst_w_backrefs(hackline, sed_cmd->replace, regmatch); |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 512 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 513 | /* advance past the match */ |
| 514 | hackline += regmatch[0].rm_eo; |
| 515 | /* flag that something has changed */ |
| 516 | altered++; |
Mark Whitley | 97562bd | 2000-07-17 20:06:42 +0000 | [diff] [blame] | 517 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 518 | /* if we're not doing this globally, get out now */ |
| 519 | if (!sed_cmd->sub_g) |
| 520 | break; |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 521 | } |
| 522 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 523 | /* if there's anything left of the line, print it */ |
| 524 | if (*hackline) |
| 525 | fputs(hackline, stdout); |
| 526 | |
| 527 | /* cleanup */ |
| 528 | free(regmatch); |
| 529 | |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 530 | return altered; |
| 531 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 532 | |
| 533 | static int do_sed_command(const struct sed_cmd *sed_cmd, const char *line) |
| 534 | { |
| 535 | int altered = 0; |
| 536 | |
| 537 | switch (sed_cmd->cmd) { |
| 538 | |
| 539 | case 'p': |
| 540 | fputs(line, stdout); |
| 541 | break; |
| 542 | |
| 543 | case 'd': |
| 544 | altered++; |
| 545 | break; |
| 546 | |
Mark Whitley | 4f7fe77 | 2000-07-13 20:01:58 +0000 | [diff] [blame] | 547 | case 's': |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 548 | |
| 549 | /* |
| 550 | * Some special cases for 's' printing to make it compliant with |
| 551 | * GNU sed printing behavior (aka "The -n | s///p Matrix"): |
| 552 | * |
| 553 | * -n ONLY = never print anything regardless of any successful |
| 554 | * substitution |
| 555 | * |
| 556 | * s///p ONLY = always print successful substitutions, even if |
| 557 | * the line is going to be printed anyway (line will be printed |
| 558 | * twice). |
| 559 | * |
| 560 | * -n AND s///p = print ONLY a successful substitution ONE TIME; |
| 561 | * no other lines are printed - this is the reason why the 'p' |
| 562 | * flag exists in the first place. |
| 563 | */ |
| 564 | |
Mark Whitley | e7ff284 | 2000-11-03 20:02:35 +0000 | [diff] [blame] | 565 | /* if the user specified that they didn't want anything printed (i.e. a -n |
| 566 | * flag and no 'p' flag after the s///), then there's really no point doing |
| 567 | * anything here. */ |
| 568 | if (be_quiet && !sed_cmd->sub_p) |
| 569 | break; |
| 570 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 571 | /* we print the line once, unless we were told to be quiet */ |
| 572 | if (!be_quiet) |
| 573 | altered = do_subst_command(sed_cmd, line); |
| 574 | |
| 575 | /* we also print the line if we were given the 'p' flag |
| 576 | * (this is quite possibly the second printing) */ |
| 577 | if (sed_cmd->sub_p) |
| 578 | altered = do_subst_command(sed_cmd, line); |
| 579 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 580 | break; |
Mark Whitley | 94074a9 | 2000-07-14 00:00:15 +0000 | [diff] [blame] | 581 | |
| 582 | case 'a': |
| 583 | fputs(line, stdout); |
| 584 | fputs(sed_cmd->editline, stdout); |
| 585 | altered++; |
| 586 | break; |
| 587 | |
| 588 | case 'i': |
| 589 | fputs(sed_cmd->editline, stdout); |
| 590 | break; |
| 591 | |
| 592 | case 'c': |
| 593 | fputs(sed_cmd->editline, stdout); |
| 594 | altered++; |
| 595 | break; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | return altered; |
| 599 | } |
| 600 | |
| 601 | static void process_file(FILE *file) |
| 602 | { |
| 603 | char *line = NULL; |
| 604 | static int linenum = 0; /* GNU sed does not restart counting lines at EOF */ |
| 605 | unsigned int still_in_range = 0; |
| 606 | int line_altered; |
| 607 | int i; |
| 608 | |
| 609 | /* go through every line in the file */ |
| 610 | while ((line = get_line_from_file(file)) != NULL) { |
| 611 | |
| 612 | linenum++; |
| 613 | line_altered = 0; |
| 614 | |
| 615 | /* for every line, go through all the commands */ |
| 616 | for (i = 0; i < ncmds; i++) { |
| 617 | |
| 618 | /* are we acting on a range of matched lines? */ |
| 619 | if (sed_cmds[i].beg_match && sed_cmds[i].end_match) { |
| 620 | if (still_in_range || regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) { |
| 621 | line_altered += do_sed_command(&sed_cmds[i], line); |
| 622 | still_in_range = 1; |
| 623 | if (regexec(sed_cmds[i].end_match, line, 0, NULL, 0) == 0) |
| 624 | still_in_range = 0; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /* are we trying to match a single line? */ |
| 629 | else if (sed_cmds[i].beg_match) { |
| 630 | if (regexec(sed_cmds[i].beg_match, line, 0, NULL, 0) == 0) |
| 631 | line_altered += do_sed_command(&sed_cmds[i], line); |
| 632 | } |
| 633 | |
| 634 | /* are we acting on a range of line numbers? */ |
Mark Whitley | 40406e6 | 2000-08-10 00:09:47 +0000 | [diff] [blame] | 635 | else if (sed_cmds[i].beg_line > 0 && sed_cmds[i].end_line != 0) { |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 636 | if (linenum >= sed_cmds[i].beg_line && |
| 637 | (sed_cmds[i].end_line == -1 || linenum <= sed_cmds[i].end_line)) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 638 | line_altered += do_sed_command(&sed_cmds[i], line); |
| 639 | } |
| 640 | |
| 641 | /* are we acting on a specified line number */ |
| 642 | else if (sed_cmds[i].beg_line > 0) { |
| 643 | if (linenum == sed_cmds[i].beg_line) |
| 644 | line_altered += do_sed_command(&sed_cmds[i], line); |
| 645 | } |
| 646 | |
| 647 | /* not acting on matches or line numbers. act on every line */ |
| 648 | else |
| 649 | line_altered += do_sed_command(&sed_cmds[i], line); |
| 650 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 651 | } |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 652 | |
Mark Whitley | 2dc192f | 2000-11-03 19:47:00 +0000 | [diff] [blame] | 653 | /* we will print the line unless we were told to be quiet or if the |
| 654 | * line was altered (via a 'd'elete or 's'ubstitution), in which case |
| 655 | * the altered line was already printed */ |
| 656 | if (!be_quiet && !line_altered) |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 657 | fputs(line, stdout); |
| 658 | |
| 659 | free(line); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 660 | } |
Erik Andersen | 1266a13 | 1999-12-29 22:19:46 +0000 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | extern int sed_main(int argc, char **argv) |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 664 | { |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 665 | int opt; |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 666 | |
Eric Andersen | b040d4f | 2000-07-25 18:01:20 +0000 | [diff] [blame] | 667 | #ifdef BB_FEATURE_CLEAN_UP |
Mark Whitley | 858c1ad | 2000-07-11 21:38:47 +0000 | [diff] [blame] | 668 | /* destroy command strings on exit */ |
Matt Kraai | a9819b2 | 2000-12-22 01:48:07 +0000 | [diff] [blame] | 669 | if (atexit(destroy_cmd_strs) == -1) |
| 670 | perror_msg_and_die("atexit"); |
Mark Whitley | c41e8c8 | 2000-07-12 23:35:21 +0000 | [diff] [blame] | 671 | #endif |
Mark Whitley | 858c1ad | 2000-07-11 21:38:47 +0000 | [diff] [blame] | 672 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 673 | /* do normal option parsing */ |
Mark Whitley | 1f45b26 | 2000-07-20 23:08:40 +0000 | [diff] [blame] | 674 | while ((opt = getopt(argc, argv, "hne:f:")) > 0) { |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 675 | switch (opt) { |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 676 | case 'h': |
| 677 | usage(sed_usage); |
| 678 | break; |
Erik Andersen | e916d24 | 2000-03-06 19:20:35 +0000 | [diff] [blame] | 679 | case 'n': |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 680 | be_quiet++; |
Erik Andersen | e916d24 | 2000-03-06 19:20:35 +0000 | [diff] [blame] | 681 | break; |
| 682 | case 'e': |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 683 | add_cmd_str(optarg); |
Erik Andersen | e916d24 | 2000-03-06 19:20:35 +0000 | [diff] [blame] | 684 | break; |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 685 | case 'f': |
| 686 | load_cmd_file(optarg); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 687 | break; |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 688 | } |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 689 | } |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 690 | |
| 691 | /* if we didn't get a pattern from a -e and no command file was specified, |
| 692 | * argv[optind] should be the pattern. no pattern, no worky */ |
| 693 | if (ncmds == 0) { |
| 694 | if (argv[optind] == NULL) |
| 695 | usage(sed_usage); |
| 696 | else { |
| 697 | add_cmd_str(argv[optind]); |
| 698 | optind++; |
| 699 | } |
| 700 | } |
| 701 | |
| 702 | |
| 703 | /* argv[(optind)..(argc-1)] should be names of file to process. If no |
| 704 | * files were specified or '-' was specified, take input from stdin. |
| 705 | * Otherwise, we process all the files specified. */ |
| 706 | if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) { |
| 707 | process_file(stdin); |
| 708 | } |
| 709 | else { |
| 710 | int i; |
| 711 | FILE *file; |
| 712 | for (i = optind; i < argc; i++) { |
| 713 | file = fopen(argv[i], "r"); |
| 714 | if (file == NULL) { |
Matt Kraai | 1fa1ade | 2000-12-18 03:57:16 +0000 | [diff] [blame] | 715 | perror_msg("%s", argv[i]); |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 716 | } else { |
| 717 | process_file(file); |
| 718 | fclose(file); |
| 719 | } |
| 720 | } |
| 721 | } |
| 722 | |
Mark Whitley | 6315ce6 | 2000-07-10 22:55:51 +0000 | [diff] [blame] | 723 | return 0; |
Eric Andersen | 6b6b3f6 | 1999-10-28 16:06:25 +0000 | [diff] [blame] | 724 | } |