Annotation of /trunk/mkinitrd-magellan/busybox/findutils/grep.c
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Revision 816 -
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 19339 byte(s)
-updated to busybox-1.13.4
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * Mini grep implementation for busybox using libc regex. | ||
4 | * | ||
5 | * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley | ||
6 | * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org> | ||
7 | * | ||
8 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. | ||
9 | */ | ||
10 | niro | 816 | /* BB_AUDIT SUSv3 defects - unsupported option -x "match whole line only". */ |
11 | niro | 532 | /* BB_AUDIT GNU defects - always acts as -a. */ |
12 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */ | ||
13 | /* | ||
14 | * 2004,2006 (C) Vladimir Oleynik <dzo@simtreas.ru> - | ||
15 | * correction "-e pattern1 -e pattern2" logic and more optimizations. | ||
16 | * precompiled regex | ||
17 | */ | ||
18 | /* | ||
19 | * (C) 2006 Jac Goudsmit added -o option | ||
20 | */ | ||
21 | |||
22 | niro | 816 | #include "libbb.h" |
23 | niro | 532 | #include "xregex.h" |
24 | |||
25 | niro | 816 | /* options */ |
26 | #define OPTSTR_GREP \ | ||
27 | "lnqvscFiHhe:f:Lorm:" \ | ||
28 | USE_FEATURE_GREP_CONTEXT("A:B:C:") \ | ||
29 | USE_FEATURE_GREP_EGREP_ALIAS("E") \ | ||
30 | USE_DESKTOP("w") \ | ||
31 | "aI" | ||
32 | /* ignored: -a "assume all files to be text" */ | ||
33 | /* ignored: -I "assume binary files have no matches" */ | ||
34 | niro | 532 | |
35 | niro | 816 | enum { |
36 | OPTBIT_l, /* list matched file names only */ | ||
37 | OPTBIT_n, /* print line# */ | ||
38 | OPTBIT_q, /* quiet - exit(EXIT_SUCCESS) of first match */ | ||
39 | OPTBIT_v, /* invert the match, to select non-matching lines */ | ||
40 | OPTBIT_s, /* suppress errors about file open errors */ | ||
41 | OPTBIT_c, /* count matches per file (suppresses normal output) */ | ||
42 | OPTBIT_F, /* literal match */ | ||
43 | OPTBIT_i, /* case-insensitive */ | ||
44 | OPTBIT_H, /* force filename display */ | ||
45 | OPTBIT_h, /* inhibit filename display */ | ||
46 | OPTBIT_e, /* -e PATTERN */ | ||
47 | OPTBIT_f, /* -f FILE_WITH_PATTERNS */ | ||
48 | OPTBIT_L, /* list unmatched file names only */ | ||
49 | OPTBIT_o, /* show only matching parts of lines */ | ||
50 | OPTBIT_r, /* recurse dirs */ | ||
51 | OPTBIT_m, /* -m MAX_MATCHES */ | ||
52 | USE_FEATURE_GREP_CONTEXT( OPTBIT_A ,) /* -A NUM: after-match context */ | ||
53 | USE_FEATURE_GREP_CONTEXT( OPTBIT_B ,) /* -B NUM: before-match context */ | ||
54 | USE_FEATURE_GREP_CONTEXT( OPTBIT_C ,) /* -C NUM: -A and -B combined */ | ||
55 | USE_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */ | ||
56 | USE_DESKTOP( OPTBIT_w ,) /* whole word match */ | ||
57 | OPT_l = 1 << OPTBIT_l, | ||
58 | OPT_n = 1 << OPTBIT_n, | ||
59 | OPT_q = 1 << OPTBIT_q, | ||
60 | OPT_v = 1 << OPTBIT_v, | ||
61 | OPT_s = 1 << OPTBIT_s, | ||
62 | OPT_c = 1 << OPTBIT_c, | ||
63 | OPT_F = 1 << OPTBIT_F, | ||
64 | OPT_i = 1 << OPTBIT_i, | ||
65 | OPT_H = 1 << OPTBIT_H, | ||
66 | OPT_h = 1 << OPTBIT_h, | ||
67 | OPT_e = 1 << OPTBIT_e, | ||
68 | OPT_f = 1 << OPTBIT_f, | ||
69 | OPT_L = 1 << OPTBIT_L, | ||
70 | OPT_o = 1 << OPTBIT_o, | ||
71 | OPT_r = 1 << OPTBIT_r, | ||
72 | OPT_m = 1 << OPTBIT_m, | ||
73 | OPT_A = USE_FEATURE_GREP_CONTEXT( (1 << OPTBIT_A)) + 0, | ||
74 | OPT_B = USE_FEATURE_GREP_CONTEXT( (1 << OPTBIT_B)) + 0, | ||
75 | OPT_C = USE_FEATURE_GREP_CONTEXT( (1 << OPTBIT_C)) + 0, | ||
76 | OPT_E = USE_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0, | ||
77 | OPT_w = USE_DESKTOP( (1 << OPTBIT_w)) + 0, | ||
78 | }; | ||
79 | |||
80 | #define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l) | ||
81 | #define PRINT_LINE_NUM (option_mask32 & OPT_n) | ||
82 | #define BE_QUIET (option_mask32 & OPT_q) | ||
83 | #define SUPPRESS_ERR_MSGS (option_mask32 & OPT_s) | ||
84 | #define PRINT_MATCH_COUNTS (option_mask32 & OPT_c) | ||
85 | #define FGREP_FLAG (option_mask32 & OPT_F) | ||
86 | #define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L) | ||
87 | |||
88 | struct globals { | ||
89 | int max_matches; | ||
90 | #if !ENABLE_EXTRA_COMPAT | ||
91 | int reflags; | ||
92 | niro | 532 | #else |
93 | niro | 816 | RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */ |
94 | niro | 532 | #endif |
95 | niro | 816 | smalluint invert_search; |
96 | smalluint print_filename; | ||
97 | smalluint open_errors; | ||
98 | #if ENABLE_FEATURE_GREP_CONTEXT | ||
99 | smalluint did_print_line; | ||
100 | int lines_before; | ||
101 | int lines_after; | ||
102 | char **before_buf; | ||
103 | USE_EXTRA_COMPAT(size_t *before_buf_size;) | ||
104 | int last_line_printed; | ||
105 | #endif | ||
106 | /* globals used internally */ | ||
107 | llist_t *pattern_head; /* growable list of patterns to match */ | ||
108 | const char *cur_file; /* the current file we are reading */ | ||
109 | }; | ||
110 | #define G (*(struct globals*)&bb_common_bufsiz1) | ||
111 | #define INIT_G() do { \ | ||
112 | struct G_sizecheck { \ | ||
113 | char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \ | ||
114 | }; \ | ||
115 | } while (0) | ||
116 | #define max_matches (G.max_matches ) | ||
117 | #if !ENABLE_EXTRA_COMPAT | ||
118 | #define reflags (G.reflags ) | ||
119 | niro | 532 | #else |
120 | niro | 816 | #define case_fold (G.case_fold ) |
121 | /* http://www.delorie.com/gnu/docs/regex/regex_46.html */ | ||
122 | #define reflags re_syntax_options | ||
123 | #undef REG_NOSUB | ||
124 | #undef REG_EXTENDED | ||
125 | #undef REG_ICASE | ||
126 | #define REG_NOSUB bug:is:here /* should not be used */ | ||
127 | #define REG_EXTENDED RE_SYNTAX_EGREP | ||
128 | #define REG_ICASE bug:is:here /* should not be used */ | ||
129 | niro | 532 | #endif |
130 | niro | 816 | #define invert_search (G.invert_search ) |
131 | #define print_filename (G.print_filename ) | ||
132 | #define open_errors (G.open_errors ) | ||
133 | #define did_print_line (G.did_print_line ) | ||
134 | #define lines_before (G.lines_before ) | ||
135 | #define lines_after (G.lines_after ) | ||
136 | #define before_buf (G.before_buf ) | ||
137 | #define before_buf_size (G.before_buf_size ) | ||
138 | #define last_line_printed (G.last_line_printed ) | ||
139 | #define pattern_head (G.pattern_head ) | ||
140 | #define cur_file (G.cur_file ) | ||
141 | niro | 532 | |
142 | |||
143 | niro | 816 | typedef struct grep_list_data_t { |
144 | niro | 532 | char *pattern; |
145 | niro | 816 | /* for GNU regex, matched_range must be persistent across grep_file() calls */ |
146 | #if !ENABLE_EXTRA_COMPAT | ||
147 | regex_t compiled_regex; | ||
148 | regmatch_t matched_range; | ||
149 | #else | ||
150 | struct re_pattern_buffer compiled_regex; | ||
151 | struct re_registers matched_range; | ||
152 | #endif | ||
153 | #define ALLOCATED 1 | ||
154 | niro | 532 | #define COMPILED 2 |
155 | int flg_mem_alocated_compiled; | ||
156 | } grep_list_data_t; | ||
157 | |||
158 | niro | 816 | #if !ENABLE_EXTRA_COMPAT |
159 | #define print_line(line, line_len, linenum, decoration) \ | ||
160 | print_line(line, linenum, decoration) | ||
161 | #endif | ||
162 | static void print_line(const char *line, size_t line_len, int linenum, char decoration) | ||
163 | niro | 532 | { |
164 | #if ENABLE_FEATURE_GREP_CONTEXT | ||
165 | niro | 816 | /* Happens when we go to next file, immediately hit match |
166 | * and try to print prev context... from prev file! Don't do it */ | ||
167 | if (linenum < 1) | ||
168 | return; | ||
169 | niro | 532 | /* possibly print the little '--' separator */ |
170 | niro | 816 | if ((lines_before || lines_after) && did_print_line |
171 | && last_line_printed != linenum - 1 | ||
172 | ) { | ||
173 | niro | 532 | puts("--"); |
174 | } | ||
175 | niro | 816 | /* guard against printing "--" before first line of first file */ |
176 | did_print_line = 1; | ||
177 | niro | 532 | last_line_printed = linenum; |
178 | #endif | ||
179 | if (print_filename) | ||
180 | printf("%s%c", cur_file, decoration); | ||
181 | if (PRINT_LINE_NUM) | ||
182 | printf("%i%c", linenum, decoration); | ||
183 | /* Emulate weird GNU grep behavior with -ov */ | ||
184 | niro | 816 | if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o)) { |
185 | #if !ENABLE_EXTRA_COMPAT | ||
186 | niro | 532 | puts(line); |
187 | niro | 816 | #else |
188 | fwrite(line, 1, line_len, stdout); | ||
189 | putchar('\n'); | ||
190 | #endif | ||
191 | } | ||
192 | niro | 532 | } |
193 | |||
194 | niro | 816 | #if ENABLE_EXTRA_COMPAT |
195 | /* Unlike getline, this one removes trailing '\n' */ | ||
196 | static ssize_t FAST_FUNC bb_getline(char **line_ptr, size_t *line_alloc_len, FILE *file) | ||
197 | { | ||
198 | ssize_t res_sz; | ||
199 | char *line; | ||
200 | niro | 532 | |
201 | niro | 816 | res_sz = getline(line_ptr, line_alloc_len, file); |
202 | line = *line_ptr; | ||
203 | |||
204 | if (res_sz > 0) { | ||
205 | if (line[res_sz - 1] == '\n') | ||
206 | line[--res_sz] = '\0'; | ||
207 | } else { | ||
208 | free(line); /* uclibc allocates a buffer even on EOF. WTF? */ | ||
209 | } | ||
210 | return res_sz; | ||
211 | } | ||
212 | #endif | ||
213 | |||
214 | niro | 532 | static int grep_file(FILE *file) |
215 | { | ||
216 | niro | 816 | smalluint found; |
217 | niro | 532 | int linenum = 0; |
218 | int nmatches = 0; | ||
219 | niro | 816 | #if !ENABLE_EXTRA_COMPAT |
220 | char *line; | ||
221 | #else | ||
222 | char *line = NULL; | ||
223 | ssize_t line_len; | ||
224 | size_t line_alloc_len; | ||
225 | #define rm_so start[0] | ||
226 | #define rm_eo end[0] | ||
227 | #endif | ||
228 | niro | 532 | #if ENABLE_FEATURE_GREP_CONTEXT |
229 | int print_n_lines_after = 0; | ||
230 | int curpos = 0; /* track where we are in the circular 'before' buffer */ | ||
231 | int idx = 0; /* used for iteration through the circular buffer */ | ||
232 | niro | 816 | #else |
233 | enum { print_n_lines_after = 0 }; | ||
234 | niro | 532 | #endif /* ENABLE_FEATURE_GREP_CONTEXT */ |
235 | |||
236 | niro | 816 | while ( |
237 | #if !ENABLE_EXTRA_COMPAT | ||
238 | (line = xmalloc_fgetline(file)) != NULL | ||
239 | #else | ||
240 | (line_len = bb_getline(&line, &line_alloc_len, file)) >= 0 | ||
241 | #endif | ||
242 | ) { | ||
243 | niro | 532 | llist_t *pattern_ptr = pattern_head; |
244 | niro | 816 | grep_list_data_t *gl = gl; /* for gcc */ |
245 | niro | 532 | |
246 | linenum++; | ||
247 | niro | 816 | found = 0; |
248 | niro | 532 | while (pattern_ptr) { |
249 | gl = (grep_list_data_t *)pattern_ptr->data; | ||
250 | if (FGREP_FLAG) { | ||
251 | niro | 816 | found |= (strstr(line, gl->pattern) != NULL); |
252 | niro | 532 | } else { |
253 | if (!(gl->flg_mem_alocated_compiled & COMPILED)) { | ||
254 | gl->flg_mem_alocated_compiled |= COMPILED; | ||
255 | niro | 816 | #if !ENABLE_EXTRA_COMPAT |
256 | xregcomp(&gl->compiled_regex, gl->pattern, reflags); | ||
257 | #else | ||
258 | memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex)); | ||
259 | gl->compiled_regex.translate = case_fold; /* for -i */ | ||
260 | if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex)) | ||
261 | bb_error_msg_and_die("bad regex '%s'", gl->pattern); | ||
262 | #endif | ||
263 | niro | 532 | } |
264 | niro | 816 | #if !ENABLE_EXTRA_COMPAT |
265 | gl->matched_range.rm_so = 0; | ||
266 | gl->matched_range.rm_eo = 0; | ||
267 | #endif | ||
268 | if ( | ||
269 | #if !ENABLE_EXTRA_COMPAT | ||
270 | regexec(&gl->compiled_regex, line, 1, &gl->matched_range, 0) == 0 | ||
271 | #else | ||
272 | re_search(&gl->compiled_regex, line, line_len, | ||
273 | /*start:*/ 0, /*range:*/ line_len, | ||
274 | &gl->matched_range) >= 0 | ||
275 | #endif | ||
276 | ) { | ||
277 | if (!(option_mask32 & OPT_w)) | ||
278 | found = 1; | ||
279 | else { | ||
280 | char c = ' '; | ||
281 | if (gl->matched_range.rm_so) | ||
282 | c = line[gl->matched_range.rm_so - 1]; | ||
283 | if (!isalnum(c) && c != '_') { | ||
284 | c = line[gl->matched_range.rm_eo]; | ||
285 | if (!c || (!isalnum(c) && c != '_')) | ||
286 | found = 1; | ||
287 | } | ||
288 | } | ||
289 | } | ||
290 | niro | 532 | } |
291 | niro | 816 | /* If it's non-inverted search, we can stop |
292 | * at first match */ | ||
293 | if (found && !invert_search) | ||
294 | goto do_found; | ||
295 | niro | 532 | pattern_ptr = pattern_ptr->link; |
296 | } /* while (pattern_ptr) */ | ||
297 | |||
298 | niro | 816 | if (found ^ invert_search) { |
299 | do_found: | ||
300 | /* keep track of matches */ | ||
301 | nmatches++; | ||
302 | niro | 532 | |
303 | niro | 816 | /* quiet/print (non)matching file names only? */ |
304 | if (option_mask32 & (OPT_q|OPT_l|OPT_L)) { | ||
305 | free(line); /* we don't need line anymore */ | ||
306 | if (BE_QUIET) { | ||
307 | /* manpage says about -q: | ||
308 | * "exit immediately with zero status | ||
309 | * if any match is found, | ||
310 | * even if errors were detected" */ | ||
311 | exit(EXIT_SUCCESS); | ||
312 | } | ||
313 | niro | 532 | /* if we're just printing filenames, we stop after the first match */ |
314 | niro | 816 | if (PRINT_FILES_WITH_MATCHES) { |
315 | puts(cur_file); | ||
316 | /* fall through to "return 1" */ | ||
317 | } | ||
318 | /* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */ | ||
319 | return 1; /* one match */ | ||
320 | } | ||
321 | niro | 532 | |
322 | #if ENABLE_FEATURE_GREP_CONTEXT | ||
323 | niro | 816 | /* Were we printing context and saw next (unwanted) match? */ |
324 | if ((option_mask32 & OPT_m) && nmatches > max_matches) | ||
325 | break; | ||
326 | #endif | ||
327 | niro | 532 | |
328 | niro | 816 | /* print the matched line */ |
329 | if (PRINT_MATCH_COUNTS == 0) { | ||
330 | #if ENABLE_FEATURE_GREP_CONTEXT | ||
331 | int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1; | ||
332 | niro | 532 | |
333 | niro | 816 | /* if we were told to print 'before' lines and there is at least |
334 | * one line in the circular buffer, print them */ | ||
335 | if (lines_before && before_buf[prevpos] != NULL) { | ||
336 | int first_buf_entry_line_num = linenum - lines_before; | ||
337 | niro | 532 | |
338 | niro | 816 | /* advance to the first entry in the circular buffer, and |
339 | * figure out the line number is of the first line in the | ||
340 | * buffer */ | ||
341 | idx = curpos; | ||
342 | while (before_buf[idx] == NULL) { | ||
343 | idx = (idx + 1) % lines_before; | ||
344 | first_buf_entry_line_num++; | ||
345 | niro | 532 | } |
346 | |||
347 | niro | 816 | /* now print each line in the buffer, clearing them as we go */ |
348 | while (before_buf[idx] != NULL) { | ||
349 | print_line(before_buf[idx], before_buf_size[idx], first_buf_entry_line_num, '-'); | ||
350 | free(before_buf[idx]); | ||
351 | before_buf[idx] = NULL; | ||
352 | idx = (idx + 1) % lines_before; | ||
353 | first_buf_entry_line_num++; | ||
354 | niro | 532 | } |
355 | } | ||
356 | niro | 816 | |
357 | /* make a note that we need to print 'after' lines */ | ||
358 | print_n_lines_after = lines_after; | ||
359 | #endif | ||
360 | if (option_mask32 & OPT_o) { | ||
361 | if (FGREP_FLAG) { | ||
362 | /* -Fo just prints the pattern | ||
363 | * (unless -v: -Fov doesnt print anything at all) */ | ||
364 | if (found) | ||
365 | print_line(gl->pattern, strlen(gl->pattern), linenum, ':'); | ||
366 | } else while (1) { | ||
367 | char old = line[gl->matched_range.rm_eo]; | ||
368 | line[gl->matched_range.rm_eo] = '\0'; | ||
369 | print_line(line + gl->matched_range.rm_so, | ||
370 | gl->matched_range.rm_eo - gl->matched_range.rm_so, | ||
371 | linenum, ':'); | ||
372 | line[gl->matched_range.rm_eo] = old; | ||
373 | #if !ENABLE_EXTRA_COMPAT | ||
374 | break; | ||
375 | #else | ||
376 | if (re_search(&gl->compiled_regex, line, line_len, | ||
377 | gl->matched_range.rm_eo, line_len - gl->matched_range.rm_eo, | ||
378 | &gl->matched_range) < 0) | ||
379 | break; | ||
380 | #endif | ||
381 | } | ||
382 | } else { | ||
383 | print_line(line, line_len, linenum, ':'); | ||
384 | } | ||
385 | niro | 532 | } |
386 | niro | 816 | } |
387 | niro | 532 | #if ENABLE_FEATURE_GREP_CONTEXT |
388 | niro | 816 | else { /* no match */ |
389 | /* if we need to print some context lines after the last match, do so */ | ||
390 | if (print_n_lines_after) { | ||
391 | print_line(line, strlen(line), linenum, '-'); | ||
392 | print_n_lines_after--; | ||
393 | } else if (lines_before) { | ||
394 | niro | 532 | /* Add the line to the circular 'before' buffer */ |
395 | niro | 816 | free(before_buf[curpos]); |
396 | before_buf[curpos] = line; | ||
397 | USE_EXTRA_COMPAT(before_buf_size[curpos] = line_len;) | ||
398 | curpos = (curpos + 1) % lines_before; | ||
399 | /* avoid free(line) - we took the line */ | ||
400 | line = NULL; | ||
401 | niro | 532 | } |
402 | niro | 816 | } |
403 | niro | 532 | |
404 | #endif /* ENABLE_FEATURE_GREP_CONTEXT */ | ||
405 | niro | 816 | #if !ENABLE_EXTRA_COMPAT |
406 | niro | 532 | free(line); |
407 | niro | 816 | #endif |
408 | /* Did we print all context after last requested match? */ | ||
409 | if ((option_mask32 & OPT_m) | ||
410 | && !print_n_lines_after && nmatches == max_matches) | ||
411 | break; | ||
412 | } /* while (read line) */ | ||
413 | niro | 532 | |
414 | /* special-case file post-processing for options where we don't print line | ||
415 | * matches, just filenames and possibly match counts */ | ||
416 | |||
417 | /* grep -c: print [filename:]count, even if count is zero */ | ||
418 | if (PRINT_MATCH_COUNTS) { | ||
419 | if (print_filename) | ||
420 | printf("%s:", cur_file); | ||
421 | printf("%d\n", nmatches); | ||
422 | } | ||
423 | |||
424 | niro | 816 | /* grep -L: print just the filename */ |
425 | if (PRINT_FILES_WITHOUT_MATCHES) { | ||
426 | /* nmatches is zero, no need to check it: | ||
427 | * we return 1 early if we detected a match | ||
428 | * and PRINT_FILES_WITHOUT_MATCHES is set */ | ||
429 | niro | 532 | puts(cur_file); |
430 | } | ||
431 | |||
432 | return nmatches; | ||
433 | } | ||
434 | |||
435 | #if ENABLE_FEATURE_CLEAN_UP | ||
436 | #define new_grep_list_data(p, m) add_grep_list_data(p, m) | ||
437 | niro | 816 | static char *add_grep_list_data(char *pattern, int flg_used_mem) |
438 | niro | 532 | #else |
439 | #define new_grep_list_data(p, m) add_grep_list_data(p) | ||
440 | niro | 816 | static char *add_grep_list_data(char *pattern) |
441 | niro | 532 | #endif |
442 | { | ||
443 | niro | 816 | grep_list_data_t *gl = xzalloc(sizeof(*gl)); |
444 | niro | 532 | gl->pattern = pattern; |
445 | #if ENABLE_FEATURE_CLEAN_UP | ||
446 | gl->flg_mem_alocated_compiled = flg_used_mem; | ||
447 | #else | ||
448 | niro | 816 | /*gl->flg_mem_alocated_compiled = 0;*/ |
449 | niro | 532 | #endif |
450 | return (char *)gl; | ||
451 | } | ||
452 | |||
453 | static void load_regexes_from_file(llist_t *fopt) | ||
454 | { | ||
455 | char *line; | ||
456 | FILE *f; | ||
457 | |||
458 | while (fopt) { | ||
459 | llist_t *cur = fopt; | ||
460 | char *ffile = cur->data; | ||
461 | |||
462 | fopt = cur->link; | ||
463 | free(cur); | ||
464 | niro | 816 | f = xfopen_stdin(ffile); |
465 | while ((line = xmalloc_fgetline(f)) != NULL) { | ||
466 | niro | 532 | llist_add_to(&pattern_head, |
467 | niro | 816 | new_grep_list_data(line, ALLOCATED)); |
468 | niro | 532 | } |
469 | } | ||
470 | } | ||
471 | |||
472 | niro | 816 | static int FAST_FUNC file_action_grep(const char *filename, |
473 | struct stat *statbuf UNUSED_PARAM, | ||
474 | void* matched, | ||
475 | int depth UNUSED_PARAM) | ||
476 | niro | 532 | { |
477 | niro | 816 | FILE *file = fopen_for_read(filename); |
478 | niro | 532 | if (file == NULL) { |
479 | if (!SUPPRESS_ERR_MSGS) | ||
480 | niro | 816 | bb_simple_perror_msg(filename); |
481 | niro | 532 | open_errors = 1; |
482 | return 0; | ||
483 | } | ||
484 | cur_file = filename; | ||
485 | *(int*)matched += grep_file(file); | ||
486 | fclose(file); | ||
487 | return 1; | ||
488 | } | ||
489 | |||
490 | static int grep_dir(const char *dir) | ||
491 | { | ||
492 | int matched = 0; | ||
493 | recursive_action(dir, | ||
494 | niro | 816 | /* recurse=yes */ ACTION_RECURSE | |
495 | /* followLinks=no */ | ||
496 | /* depthFirst=yes */ ACTION_DEPTHFIRST, | ||
497 | niro | 532 | /* fileAction= */ file_action_grep, |
498 | /* dirAction= */ NULL, | ||
499 | /* userData= */ &matched, | ||
500 | /* depth= */ 0); | ||
501 | return matched; | ||
502 | } | ||
503 | |||
504 | niro | 816 | int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
505 | niro | 532 | int grep_main(int argc, char **argv) |
506 | { | ||
507 | FILE *file; | ||
508 | int matched; | ||
509 | llist_t *fopt = NULL; | ||
510 | |||
511 | /* do normal option parsing */ | ||
512 | #if ENABLE_FEATURE_GREP_CONTEXT | ||
513 | niro | 816 | int Copt; |
514 | niro | 532 | |
515 | niro | 816 | /* -H unsets -h; -C unsets -A,-B; -e,-f are lists; |
516 | * -m,-A,-B,-C have numeric param */ | ||
517 | opt_complementary = "H-h:C-AB:e::f::m+:A+:B+:C+"; | ||
518 | getopt32(argv, | ||
519 | OPTSTR_GREP, | ||
520 | &pattern_head, &fopt, &max_matches, | ||
521 | &lines_after, &lines_before, &Copt); | ||
522 | niro | 532 | |
523 | niro | 816 | if (option_mask32 & OPT_C) { |
524 | niro | 532 | /* -C unsets prev -A and -B, but following -A or -B |
525 | may override it */ | ||
526 | niro | 816 | if (!(option_mask32 & OPT_A)) /* not overridden */ |
527 | lines_after = Copt; | ||
528 | if (!(option_mask32 & OPT_B)) /* not overridden */ | ||
529 | lines_before = Copt; | ||
530 | niro | 532 | } |
531 | /* sanity checks */ | ||
532 | niro | 816 | if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) { |
533 | option_mask32 &= ~OPT_n; | ||
534 | niro | 532 | lines_before = 0; |
535 | lines_after = 0; | ||
536 | niro | 816 | } else if (lines_before > 0) { |
537 | before_buf = xzalloc(lines_before * sizeof(before_buf[0])); | ||
538 | USE_EXTRA_COMPAT(before_buf_size = xzalloc(lines_before * sizeof(before_buf_size[0]));) | ||
539 | } | ||
540 | niro | 532 | #else |
541 | /* with auto sanity checks */ | ||
542 | niro | 816 | /* -H unsets -h; -c,-q or -l unset -n; -e,-f are lists; -m N */ |
543 | opt_complementary = "H-h:c-n:q-n:l-n:e::f::m+"; | ||
544 | getopt32(argv, OPTSTR_GREP, | ||
545 | &pattern_head, &fopt, &max_matches); | ||
546 | niro | 532 | #endif |
547 | niro | 816 | invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */ |
548 | niro | 532 | |
549 | if (pattern_head != NULL) { | ||
550 | niro | 816 | /* convert char **argv to grep_list_data_t */ |
551 | niro | 532 | llist_t *cur; |
552 | |||
553 | for (cur = pattern_head; cur; cur = cur->link) | ||
554 | cur->data = new_grep_list_data(cur->data, 0); | ||
555 | } | ||
556 | niro | 816 | if (option_mask32 & OPT_f) |
557 | niro | 532 | load_regexes_from_file(fopt); |
558 | |||
559 | if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f') | ||
560 | niro | 816 | option_mask32 |= OPT_F; |
561 | niro | 532 | |
562 | niro | 816 | #if !ENABLE_EXTRA_COMPAT |
563 | if (!(option_mask32 & (OPT_o | OPT_w))) | ||
564 | niro | 532 | reflags = REG_NOSUB; |
565 | niro | 816 | #endif |
566 | niro | 532 | |
567 | niro | 816 | if (ENABLE_FEATURE_GREP_EGREP_ALIAS |
568 | && (applet_name[0] == 'e' || (option_mask32 & OPT_E)) | ||
569 | ) { | ||
570 | niro | 532 | reflags |= REG_EXTENDED; |
571 | niro | 816 | } |
572 | #if ENABLE_EXTRA_COMPAT | ||
573 | else { | ||
574 | reflags = RE_SYNTAX_GREP; | ||
575 | } | ||
576 | #endif | ||
577 | niro | 532 | |
578 | niro | 816 | if (option_mask32 & OPT_i) { |
579 | #if !ENABLE_EXTRA_COMPAT | ||
580 | niro | 532 | reflags |= REG_ICASE; |
581 | niro | 816 | #else |
582 | int i; | ||
583 | case_fold = xmalloc(256); | ||
584 | for (i = 0; i < 256; i++) | ||
585 | case_fold[i] = (unsigned char)i; | ||
586 | for (i = 'a'; i <= 'z'; i++) | ||
587 | case_fold[i] = (unsigned char)(i - ('a' - 'A')); | ||
588 | #endif | ||
589 | } | ||
590 | niro | 532 | |
591 | argv += optind; | ||
592 | argc -= optind; | ||
593 | |||
594 | niro | 816 | /* if we didn't get a pattern from -e and no command file was specified, |
595 | * first parameter should be the pattern. no pattern, no worky */ | ||
596 | niro | 532 | if (pattern_head == NULL) { |
597 | niro | 816 | char *pattern; |
598 | niro | 532 | if (*argv == NULL) |
599 | bb_show_usage(); | ||
600 | niro | 816 | pattern = new_grep_list_data(*argv++, 0); |
601 | llist_add_to(&pattern_head, pattern); | ||
602 | argc--; | ||
603 | niro | 532 | } |
604 | |||
605 | niro | 816 | /* argv[0..(argc-1)] should be names of file to grep through. If |
606 | niro | 532 | * there is more than one file to grep, we will print the filenames. */ |
607 | if (argc > 1) | ||
608 | print_filename = 1; | ||
609 | /* -H / -h of course override */ | ||
610 | niro | 816 | if (option_mask32 & OPT_H) |
611 | niro | 532 | print_filename = 1; |
612 | niro | 816 | if (option_mask32 & OPT_h) |
613 | niro | 532 | print_filename = 0; |
614 | |||
615 | /* If no files were specified, or '-' was specified, take input from | ||
616 | * stdin. Otherwise, we grep through all the files specified. */ | ||
617 | matched = 0; | ||
618 | niro | 816 | do { |
619 | niro | 532 | cur_file = *argv++; |
620 | file = stdin; | ||
621 | niro | 816 | if (!cur_file || LONE_DASH(cur_file)) { |
622 | niro | 532 | cur_file = "(standard input)"; |
623 | } else { | ||
624 | niro | 816 | if (option_mask32 & OPT_r) { |
625 | niro | 532 | struct stat st; |
626 | if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) { | ||
627 | niro | 816 | if (!(option_mask32 & OPT_h)) |
628 | niro | 532 | print_filename = 1; |
629 | matched += grep_dir(cur_file); | ||
630 | goto grep_done; | ||
631 | } | ||
632 | } | ||
633 | /* else: fopen(dir) will succeed, but reading won't */ | ||
634 | niro | 816 | file = fopen_for_read(cur_file); |
635 | niro | 532 | if (file == NULL) { |
636 | if (!SUPPRESS_ERR_MSGS) | ||
637 | niro | 816 | bb_simple_perror_msg(cur_file); |
638 | niro | 532 | open_errors = 1; |
639 | continue; | ||
640 | } | ||
641 | } | ||
642 | matched += grep_file(file); | ||
643 | fclose_if_not_stdin(file); | ||
644 | niro | 816 | grep_done: ; |
645 | } while (--argc > 0); | ||
646 | niro | 532 | |
647 | /* destroy all the elments in the pattern list */ | ||
648 | if (ENABLE_FEATURE_CLEAN_UP) { | ||
649 | while (pattern_head) { | ||
650 | llist_t *pattern_head_ptr = pattern_head; | ||
651 | niro | 816 | grep_list_data_t *gl = (grep_list_data_t *)pattern_head_ptr->data; |
652 | niro | 532 | |
653 | pattern_head = pattern_head->link; | ||
654 | niro | 816 | if (gl->flg_mem_alocated_compiled & ALLOCATED) |
655 | niro | 532 | free(gl->pattern); |
656 | niro | 816 | if (gl->flg_mem_alocated_compiled & COMPILED) |
657 | regfree(&gl->compiled_regex); | ||
658 | free(gl); | ||
659 | niro | 532 | free(pattern_head_ptr); |
660 | } | ||
661 | } | ||
662 | /* 0 = success, 1 = failed, 2 = error */ | ||
663 | if (open_errors) | ||
664 | return 2; | ||
665 | niro | 816 | return !matched; /* invert return value: 0 = success, 1 = failed */ |
666 | niro | 532 | } |