1 /* vi: set sw=4 ts=4: */
3 * Mini grep implementation for busybox using libc regex.
5 * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
6 * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
8 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
10 /* BB_AUDIT SUSv3 defects - unsupported option -x "match whole line only". */
11 /* BB_AUDIT GNU defects - always acts as -a. */
12 /* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
14 * 2004,2006 (C) Vladimir Oleynik <dzo@simtreas.ru> -
15 * correction "-e pattern1 -e pattern2" logic and more optimizations.
18 * (C) 2006 Jac Goudsmit added -o option
21 //applet:IF_GREP(APPLET(grep, _BB_DIR_BIN, _BB_SUID_DROP))
22 //applet:IF_FEATURE_GREP_EGREP_ALIAS(APPLET_ODDNAME(egrep, grep, _BB_DIR_BIN, _BB_SUID_DROP, egrep))
23 //applet:IF_FEATURE_GREP_FGREP_ALIAS(APPLET_ODDNAME(fgrep, grep, _BB_DIR_BIN, _BB_SUID_DROP, fgrep))
25 //kbuild:lib-$(CONFIG_GREP) += grep.o
31 //config: grep is used to search files for a specified pattern.
33 //config:config FEATURE_GREP_EGREP_ALIAS
34 //config: bool "Enable extended regular expressions (egrep & grep -E)"
36 //config: depends on GREP
38 //config: Enabled support for extended regular expressions. Extended
39 //config: regular expressions allow for alternation (foo|bar), grouping,
40 //config: and various repetition operators.
42 //config:config FEATURE_GREP_FGREP_ALIAS
43 //config: bool "Alias fgrep to grep -F"
45 //config: depends on GREP
47 //config: fgrep sees the search pattern as a normal string rather than
48 //config: regular expressions.
49 //config: grep -F always works, this just creates the fgrep alias.
51 //config:config FEATURE_GREP_CONTEXT
52 //config: bool "Enable before and after context flags (-A, -B and -C)"
54 //config: depends on GREP
56 //config: Print the specified number of leading (-B) and/or trailing (-A)
57 //config: context surrounding our matching lines.
58 //config: Print the specified number of context lines (-C).
65 //usage:#define grep_trivial_usage
66 //usage: "[-HhnlLoqvsriw"
68 //usage: IF_FEATURE_GREP_EGREP_ALIAS("E")
69 //usage: IF_EXTRA_COMPAT("z")
71 //usage: IF_FEATURE_GREP_CONTEXT("[-A/B/C N] ")
72 //usage: "PATTERN/-e PATTERN.../-f FILE [FILE]..."
73 //usage:#define grep_full_usage "\n\n"
74 //usage: "Search for PATTERN in FILEs (or stdin)\n"
76 //usage: "\n -H Add 'filename:' prefix"
77 //usage: "\n -h Do not add 'filename:' prefix"
78 //usage: "\n -n Add 'line_no:' prefix"
79 //usage: "\n -l Show only names of files that match"
80 //usage: "\n -L Show only names of files that don't match"
81 //usage: "\n -c Show only count of matching lines"
82 //usage: "\n -o Show only the matching part of line"
83 //usage: "\n -q Quiet. Return 0 if PATTERN is found, 1 otherwise"
84 //usage: "\n -v Select non-matching lines"
85 //usage: "\n -s Suppress open and read errors"
86 //usage: "\n -r Recurse"
87 //usage: "\n -i Ignore case"
88 //usage: "\n -w Match whole words only"
89 //usage: "\n -F PATTERN is a literal (not regexp)"
90 //usage: IF_FEATURE_GREP_EGREP_ALIAS(
91 //usage: "\n -E PATTERN is an extended regexp"
93 //usage: IF_EXTRA_COMPAT(
94 //usage: "\n -z Input is NUL terminated"
96 //usage: "\n -m N Match up to N times per file"
97 //usage: IF_FEATURE_GREP_CONTEXT(
98 //usage: "\n -A N Print N lines of trailing context"
99 //usage: "\n -B N Print N lines of leading context"
100 //usage: "\n -C N Same as '-A N -B N'"
102 //usage: "\n -e PTRN Pattern to match"
103 //usage: "\n -f FILE Read pattern from file"
105 //usage:#define grep_example_usage
106 //usage: "$ grep root /etc/passwd\n"
107 //usage: "root:x:0:0:root:/root:/bin/bash\n"
108 //usage: "$ grep ^[rR]oo. /etc/passwd\n"
109 //usage: "root:x:0:0:root:/root:/bin/bash\n"
111 //usage:#define egrep_trivial_usage NOUSAGE_STR
112 //usage:#define egrep_full_usage ""
113 //usage:#define fgrep_trivial_usage NOUSAGE_STR
114 //usage:#define fgrep_full_usage ""
116 #define OPTSTR_GREP \
117 "lnqvscFiHhe:f:Lorm:w" \
118 IF_FEATURE_GREP_CONTEXT("A:B:C:") \
119 IF_FEATURE_GREP_EGREP_ALIAS("E") \
120 IF_EXTRA_COMPAT("z") \
122 /* ignored: -a "assume all files to be text" */
123 /* ignored: -I "assume binary files have no matches" */
125 OPTBIT_l, /* list matched file names only */
126 OPTBIT_n, /* print line# */
127 OPTBIT_q, /* quiet - exit(EXIT_SUCCESS) of first match */
128 OPTBIT_v, /* invert the match, to select non-matching lines */
129 OPTBIT_s, /* suppress errors about file open errors */
130 OPTBIT_c, /* count matches per file (suppresses normal output) */
131 OPTBIT_F, /* literal match */
132 OPTBIT_i, /* case-insensitive */
133 OPTBIT_H, /* force filename display */
134 OPTBIT_h, /* inhibit filename display */
135 OPTBIT_e, /* -e PATTERN */
136 OPTBIT_f, /* -f FILE_WITH_PATTERNS */
137 OPTBIT_L, /* list unmatched file names only */
138 OPTBIT_o, /* show only matching parts of lines */
139 OPTBIT_r, /* recurse dirs */
140 OPTBIT_m, /* -m MAX_MATCHES */
141 OPTBIT_w, /* -w whole word match */
142 IF_FEATURE_GREP_CONTEXT( OPTBIT_A ,) /* -A NUM: after-match context */
143 IF_FEATURE_GREP_CONTEXT( OPTBIT_B ,) /* -B NUM: before-match context */
144 IF_FEATURE_GREP_CONTEXT( OPTBIT_C ,) /* -C NUM: -A and -B combined */
145 IF_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
146 IF_EXTRA_COMPAT( OPTBIT_z ,) /* input is NUL terminated */
147 OPT_l = 1 << OPTBIT_l,
148 OPT_n = 1 << OPTBIT_n,
149 OPT_q = 1 << OPTBIT_q,
150 OPT_v = 1 << OPTBIT_v,
151 OPT_s = 1 << OPTBIT_s,
152 OPT_c = 1 << OPTBIT_c,
153 OPT_F = 1 << OPTBIT_F,
154 OPT_i = 1 << OPTBIT_i,
155 OPT_H = 1 << OPTBIT_H,
156 OPT_h = 1 << OPTBIT_h,
157 OPT_e = 1 << OPTBIT_e,
158 OPT_f = 1 << OPTBIT_f,
159 OPT_L = 1 << OPTBIT_L,
160 OPT_o = 1 << OPTBIT_o,
161 OPT_r = 1 << OPTBIT_r,
162 OPT_m = 1 << OPTBIT_m,
163 OPT_w = 1 << OPTBIT_w,
164 OPT_A = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_A)) + 0,
165 OPT_B = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_B)) + 0,
166 OPT_C = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_C)) + 0,
167 OPT_E = IF_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
168 OPT_z = IF_EXTRA_COMPAT( (1 << OPTBIT_z)) + 0,
171 #define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l)
172 #define PRINT_LINE_NUM (option_mask32 & OPT_n)
173 #define BE_QUIET (option_mask32 & OPT_q)
174 #define SUPPRESS_ERR_MSGS (option_mask32 & OPT_s)
175 #define PRINT_MATCH_COUNTS (option_mask32 & OPT_c)
176 #define FGREP_FLAG (option_mask32 & OPT_F)
177 #define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
178 #define NUL_DELIMITED (option_mask32 & OPT_z)
182 #if !ENABLE_EXTRA_COMPAT
185 RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */
187 smalluint invert_search;
188 smalluint print_filename;
189 smalluint open_errors;
190 #if ENABLE_FEATURE_GREP_CONTEXT
191 smalluint did_print_line;
195 IF_EXTRA_COMPAT(size_t *before_buf_size;)
196 int last_line_printed;
198 /* globals used internally */
199 llist_t *pattern_head; /* growable list of patterns to match */
200 const char *cur_file; /* the current file we are reading */
202 #define G (*(struct globals*)&bb_common_bufsiz1)
203 #define INIT_G() do { \
204 struct G_sizecheck { \
205 char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
208 #define max_matches (G.max_matches )
209 #if !ENABLE_EXTRA_COMPAT
210 # define reflags (G.reflags )
212 # define case_fold (G.case_fold )
213 /* http://www.delorie.com/gnu/docs/regex/regex_46.html */
214 # define reflags re_syntax_options
218 # define REG_NOSUB bug:is:here /* should not be used */
219 /* Just RE_SYNTAX_EGREP is not enough, need to enable {n[,[m]]} too */
220 # define REG_EXTENDED (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES)
221 # define REG_ICASE bug:is:here /* should not be used */
223 #define invert_search (G.invert_search )
224 #define print_filename (G.print_filename )
225 #define open_errors (G.open_errors )
226 #define did_print_line (G.did_print_line )
227 #define lines_before (G.lines_before )
228 #define lines_after (G.lines_after )
229 #define before_buf (G.before_buf )
230 #define before_buf_size (G.before_buf_size )
231 #define last_line_printed (G.last_line_printed )
232 #define pattern_head (G.pattern_head )
233 #define cur_file (G.cur_file )
236 typedef struct grep_list_data_t {
238 /* for GNU regex, matched_range must be persistent across grep_file() calls */
239 #if !ENABLE_EXTRA_COMPAT
240 regex_t compiled_regex;
241 regmatch_t matched_range;
243 struct re_pattern_buffer compiled_regex;
244 struct re_registers matched_range;
248 int flg_mem_alocated_compiled;
251 #if !ENABLE_EXTRA_COMPAT
252 #define print_line(line, line_len, linenum, decoration) \
253 print_line(line, linenum, decoration)
255 static void print_line(const char *line, size_t line_len, int linenum, char decoration)
257 #if ENABLE_FEATURE_GREP_CONTEXT
258 /* Happens when we go to next file, immediately hit match
259 * and try to print prev context... from prev file! Don't do it */
262 /* possibly print the little '--' separator */
263 if ((lines_before || lines_after) && did_print_line
264 && last_line_printed != linenum - 1
268 /* guard against printing "--" before first line of first file */
270 last_line_printed = linenum;
273 printf("%s%c", cur_file, decoration);
275 printf("%i%c", linenum, decoration);
276 /* Emulate weird GNU grep behavior with -ov */
277 if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o)) {
278 #if !ENABLE_EXTRA_COMPAT
281 fwrite(line, 1, line_len, stdout);
282 putchar(NUL_DELIMITED ? '\0' : '\n');
287 #if ENABLE_EXTRA_COMPAT
288 /* Unlike getline, this one removes trailing '\n' */
289 static ssize_t FAST_FUNC bb_getline(char **line_ptr, size_t *line_alloc_len, FILE *file)
293 int delim = (NUL_DELIMITED ? '\0' : '\n');
295 res_sz = getdelim(line_ptr, line_alloc_len, delim, file);
299 if (line[res_sz - 1] == delim)
300 line[--res_sz] = '\0';
302 free(line); /* uclibc allocates a buffer even on EOF. WTF? */
308 static int grep_file(FILE *file)
313 #if !ENABLE_EXTRA_COMPAT
318 size_t line_alloc_len;
319 # define rm_so start[0]
320 # define rm_eo end[0]
322 #if ENABLE_FEATURE_GREP_CONTEXT
323 int print_n_lines_after = 0;
324 int curpos = 0; /* track where we are in the circular 'before' buffer */
325 int idx = 0; /* used for iteration through the circular buffer */
327 enum { print_n_lines_after = 0 };
331 #if !ENABLE_EXTRA_COMPAT
332 (line = xmalloc_fgetline(file)) != NULL
334 (line_len = bb_getline(&line, &line_alloc_len, file)) >= 0
337 llist_t *pattern_ptr = pattern_head;
338 grep_list_data_t *gl = gl; /* for gcc */
342 while (pattern_ptr) {
343 gl = (grep_list_data_t *)pattern_ptr->data;
345 found |= (((option_mask32 & OPT_i)
346 ? strcasestr(line, gl->pattern)
347 : strstr(line, gl->pattern)
350 if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
351 gl->flg_mem_alocated_compiled |= COMPILED;
352 #if !ENABLE_EXTRA_COMPAT
353 xregcomp(&gl->compiled_regex, gl->pattern, reflags);
355 memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex));
356 gl->compiled_regex.translate = case_fold; /* for -i */
357 if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex))
358 bb_error_msg_and_die("bad regex '%s'", gl->pattern);
361 #if !ENABLE_EXTRA_COMPAT
362 gl->matched_range.rm_so = 0;
363 gl->matched_range.rm_eo = 0;
366 #if !ENABLE_EXTRA_COMPAT
367 regexec(&gl->compiled_regex, line, 1, &gl->matched_range, 0) == 0
369 re_search(&gl->compiled_regex, line, line_len,
370 /*start:*/ 0, /*range:*/ line_len,
371 &gl->matched_range) >= 0
374 if (!(option_mask32 & OPT_w))
378 if (gl->matched_range.rm_so)
379 c = line[gl->matched_range.rm_so - 1];
380 if (!isalnum(c) && c != '_') {
381 c = line[gl->matched_range.rm_eo];
382 if (!c || (!isalnum(c) && c != '_'))
388 /* If it's non-inverted search, we can stop
390 if (found && !invert_search)
392 pattern_ptr = pattern_ptr->link;
393 } /* while (pattern_ptr) */
395 if (found ^ invert_search) {
397 /* keep track of matches */
400 /* quiet/print (non)matching file names only? */
401 if (option_mask32 & (OPT_q|OPT_l|OPT_L)) {
402 free(line); /* we don't need line anymore */
404 /* manpage says about -q:
405 * "exit immediately with zero status
406 * if any match is found,
407 * even if errors were detected" */
410 /* if we're just printing filenames, we stop after the first match */
411 if (PRINT_FILES_WITH_MATCHES) {
413 /* fall through to "return 1" */
415 /* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
416 return 1; /* one match */
419 #if ENABLE_FEATURE_GREP_CONTEXT
420 /* Were we printing context and saw next (unwanted) match? */
421 if ((option_mask32 & OPT_m) && nmatches > max_matches)
425 /* print the matched line */
426 if (PRINT_MATCH_COUNTS == 0) {
427 #if ENABLE_FEATURE_GREP_CONTEXT
428 int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
430 /* if we were told to print 'before' lines and there is at least
431 * one line in the circular buffer, print them */
432 if (lines_before && before_buf[prevpos] != NULL) {
433 int first_buf_entry_line_num = linenum - lines_before;
435 /* advance to the first entry in the circular buffer, and
436 * figure out the line number is of the first line in the
439 while (before_buf[idx] == NULL) {
440 idx = (idx + 1) % lines_before;
441 first_buf_entry_line_num++;
444 /* now print each line in the buffer, clearing them as we go */
445 while (before_buf[idx] != NULL) {
446 print_line(before_buf[idx], before_buf_size[idx], first_buf_entry_line_num, '-');
447 free(before_buf[idx]);
448 before_buf[idx] = NULL;
449 idx = (idx + 1) % lines_before;
450 first_buf_entry_line_num++;
454 /* make a note that we need to print 'after' lines */
455 print_n_lines_after = lines_after;
457 if (option_mask32 & OPT_o) {
459 /* -Fo just prints the pattern
460 * (unless -v: -Fov doesnt print anything at all) */
462 print_line(gl->pattern, strlen(gl->pattern), linenum, ':');
464 unsigned end = gl->matched_range.rm_eo;
465 char old = line[end];
467 print_line(line + gl->matched_range.rm_so,
468 end - gl->matched_range.rm_so,
473 #if !ENABLE_EXTRA_COMPAT
474 if (regexec(&gl->compiled_regex, line + end,
475 1, &gl->matched_range, REG_NOTBOL) != 0)
477 gl->matched_range.rm_so += end;
478 gl->matched_range.rm_eo += end;
480 if (re_search(&gl->compiled_regex, line, line_len,
482 &gl->matched_range) < 0)
487 print_line(line, line_len, linenum, ':');
491 #if ENABLE_FEATURE_GREP_CONTEXT
492 else { /* no match */
493 /* if we need to print some context lines after the last match, do so */
494 if (print_n_lines_after) {
495 print_line(line, strlen(line), linenum, '-');
496 print_n_lines_after--;
497 } else if (lines_before) {
498 /* Add the line to the circular 'before' buffer */
499 free(before_buf[curpos]);
500 before_buf[curpos] = line;
501 IF_EXTRA_COMPAT(before_buf_size[curpos] = line_len;)
502 curpos = (curpos + 1) % lines_before;
503 /* avoid free(line) - we took the line */
508 #endif /* ENABLE_FEATURE_GREP_CONTEXT */
509 #if !ENABLE_EXTRA_COMPAT
512 /* Did we print all context after last requested match? */
513 if ((option_mask32 & OPT_m)
514 && !print_n_lines_after
515 && nmatches == max_matches
519 } /* while (read line) */
521 /* special-case file post-processing for options where we don't print line
522 * matches, just filenames and possibly match counts */
524 /* grep -c: print [filename:]count, even if count is zero */
525 if (PRINT_MATCH_COUNTS) {
527 printf("%s:", cur_file);
528 printf("%d\n", nmatches);
531 /* grep -L: print just the filename */
532 if (PRINT_FILES_WITHOUT_MATCHES) {
533 /* nmatches is zero, no need to check it:
534 * we return 1 early if we detected a match
535 * and PRINT_FILES_WITHOUT_MATCHES is set */
542 #if ENABLE_FEATURE_CLEAN_UP
543 #define new_grep_list_data(p, m) add_grep_list_data(p, m)
544 static char *add_grep_list_data(char *pattern, int flg_used_mem)
546 #define new_grep_list_data(p, m) add_grep_list_data(p)
547 static char *add_grep_list_data(char *pattern)
550 grep_list_data_t *gl = xzalloc(sizeof(*gl));
551 gl->pattern = pattern;
552 #if ENABLE_FEATURE_CLEAN_UP
553 gl->flg_mem_alocated_compiled = flg_used_mem;
555 /*gl->flg_mem_alocated_compiled = 0;*/
560 static void load_regexes_from_file(llist_t *fopt)
567 char *ffile = cur->data;
571 f = xfopen_stdin(ffile);
572 while ((line = xmalloc_fgetline(f)) != NULL) {
573 llist_add_to(&pattern_head,
574 new_grep_list_data(line, ALLOCATED));
579 static int FAST_FUNC file_action_grep(const char *filename,
580 struct stat *statbuf UNUSED_PARAM,
582 int depth UNUSED_PARAM)
584 FILE *file = fopen_for_read(filename);
586 if (!SUPPRESS_ERR_MSGS)
587 bb_simple_perror_msg(filename);
592 *(int*)matched += grep_file(file);
597 static int grep_dir(const char *dir)
600 recursive_action(dir,
601 /* recurse=yes */ ACTION_RECURSE |
603 /* depthFirst=yes */ ACTION_DEPTHFIRST,
604 /* fileAction= */ file_action_grep,
605 /* dirAction= */ NULL,
606 /* userData= */ &matched,
611 int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
612 int grep_main(int argc UNUSED_PARAM, char **argv)
616 llist_t *fopt = NULL;
618 /* do normal option parsing */
619 #if ENABLE_FEATURE_GREP_CONTEXT
622 /* -H unsets -h; -C unsets -A,-B; -e,-f are lists;
623 * -m,-A,-B,-C have numeric param */
624 opt_complementary = "H-h:C-AB:e::f::m+:A+:B+:C+";
627 &pattern_head, &fopt, &max_matches,
628 &lines_after, &lines_before, &Copt);
630 if (option_mask32 & OPT_C) {
631 /* -C unsets prev -A and -B, but following -A or -B
633 if (!(option_mask32 & OPT_A)) /* not overridden */
635 if (!(option_mask32 & OPT_B)) /* not overridden */
639 if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
640 option_mask32 &= ~OPT_n;
643 } else if (lines_before > 0) {
644 before_buf = xzalloc(lines_before * sizeof(before_buf[0]));
645 IF_EXTRA_COMPAT(before_buf_size = xzalloc(lines_before * sizeof(before_buf_size[0]));)
648 /* with auto sanity checks */
649 /* -H unsets -h; -c,-q or -l unset -n; -e,-f are lists; -m N */
650 opt_complementary = "H-h:c-n:q-n:l-n:e::f::m+";
651 getopt32(argv, OPTSTR_GREP,
652 &pattern_head, &fopt, &max_matches);
654 invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
656 if (pattern_head != NULL) {
657 /* convert char **argv to grep_list_data_t */
660 for (cur = pattern_head; cur; cur = cur->link)
661 cur->data = new_grep_list_data(cur->data, 0);
663 if (option_mask32 & OPT_f)
664 load_regexes_from_file(fopt);
666 if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
667 option_mask32 |= OPT_F;
669 #if !ENABLE_EXTRA_COMPAT
670 if (!(option_mask32 & (OPT_o | OPT_w)))
674 if (ENABLE_FEATURE_GREP_EGREP_ALIAS
675 && (applet_name[0] == 'e' || (option_mask32 & OPT_E))
677 reflags |= REG_EXTENDED;
679 #if ENABLE_EXTRA_COMPAT
681 reflags = RE_SYNTAX_GREP;
685 if (option_mask32 & OPT_i) {
686 #if !ENABLE_EXTRA_COMPAT
687 reflags |= REG_ICASE;
690 case_fold = xmalloc(256);
691 for (i = 0; i < 256; i++)
692 case_fold[i] = (unsigned char)i;
693 for (i = 'a'; i <= 'z'; i++)
694 case_fold[i] = (unsigned char)(i - ('a' - 'A'));
700 /* if we didn't get a pattern from -e and no command file was specified,
701 * first parameter should be the pattern. no pattern, no worky */
702 if (pattern_head == NULL) {
706 pattern = new_grep_list_data(*argv++, 0);
707 llist_add_to(&pattern_head, pattern);
710 /* argv[0..(argc-1)] should be names of file to grep through. If
711 * there is more than one file to grep, we will print the filenames. */
712 if (argv[0] && argv[1])
714 /* -H / -h of course override */
715 if (option_mask32 & OPT_H)
717 if (option_mask32 & OPT_h)
720 /* If no files were specified, or '-' was specified, take input from
721 * stdin. Otherwise, we grep through all the files specified. */
726 if (!cur_file || LONE_DASH(cur_file)) {
727 cur_file = "(standard input)";
729 if (option_mask32 & OPT_r) {
731 if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
732 if (!(option_mask32 & OPT_h))
734 matched += grep_dir(cur_file);
738 /* else: fopen(dir) will succeed, but reading won't */
739 file = fopen_for_read(cur_file);
741 if (!SUPPRESS_ERR_MSGS)
742 bb_simple_perror_msg(cur_file);
747 matched += grep_file(file);
748 fclose_if_not_stdin(file);
750 } while (*argv && *++argv);
752 /* destroy all the elments in the pattern list */
753 if (ENABLE_FEATURE_CLEAN_UP) {
754 while (pattern_head) {
755 llist_t *pattern_head_ptr = pattern_head;
756 grep_list_data_t *gl = (grep_list_data_t *)pattern_head_ptr->data;
758 pattern_head = pattern_head->link;
759 if (gl->flg_mem_alocated_compiled & ALLOCATED)
761 if (gl->flg_mem_alocated_compiled & COMPILED)
762 regfree(&gl->compiled_regex);
764 free(pattern_head_ptr);
767 /* 0 = success, 1 = failed, 2 = error */
770 return !matched; /* invert return value: 0 = success, 1 = failed */