blob: 40caef42302089bac937a1f600ae9a32b3c2a6dd [file] [log] [blame]
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +00001/* vi: set sw=4 ts=4: */
Eric Andersencc8ed391999-10-05 16:24:54 +00002/*
Mark Whitleyd3721892000-06-28 22:00:26 +00003 * Mini grep implementation for busybox using libc regex.
Eric Andersenc4996011999-10-20 22:08:37 +00004 *
Eric Andersenbdfd0d72001-10-24 05:00:29 +00005 * Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
Eric Andersenc7bda1c2004-03-15 08:29:22 +00006 * Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
Eric Andersencc8ed391999-10-05 16:24:54 +00007 *
Bernhard Reutner-Fischer7fee0c42006-09-13 16:39:19 +00008 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
Eric Andersencc8ed391999-10-05 16:24:54 +00009 */
Denis Vlasenko1d426652008-03-17 09:09:09 +000010/* BB_AUDIT SUSv3 defects - unsupported option -x "match whole line only". */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +000011/* BB_AUDIT GNU defects - always acts as -a. */
12/* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
Eric Andersen8876fb22003-06-20 09:01:58 +000013/*
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +000014 * 2004,2006 (C) Vladimir Oleynik <dzo@simtreas.ru> -
Eric Andersen7f164cd2004-05-26 09:46:41 +000015 * correction "-e pattern1 -e pattern2" logic and more optimizations.
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +000016 * precompiled regex
Denis Vlasenko51937532006-09-29 20:58:53 +000017 */
18/*
19 * (C) 2006 Jac Goudsmit added -o option
20 */
Eric Andersencc8ed391999-10-05 16:24:54 +000021
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000022#include "libbb.h"
"Vladimir N. Oleynik"23f62fc2005-09-14 16:59:11 +000023#include "xregex.h"
Mark Whitleyd3721892000-06-28 22:00:26 +000024
Mark Whitleyd3721892000-06-28 22:00:26 +000025/* options */
Denis Vlasenko385304d2007-02-25 02:38:20 +000026#define OPTSTR_GREP \
Denys Vlasenko05273da2010-04-26 08:45:44 +020027 "lnqvscFiHhe:f:Lorm:w" \
Denis Vlasenko5e34ff22009-04-21 11:09:40 +000028 IF_FEATURE_GREP_CONTEXT("A:B:C:") \
29 IF_FEATURE_GREP_EGREP_ALIAS("E") \
Denis Vlasenko5e34ff22009-04-21 11:09:40 +000030 IF_EXTRA_COMPAT("z") \
Denis Vlasenkof8ea0f32007-02-25 02:38:54 +000031 "aI"
Denis Vlasenko3266aa92009-04-01 11:24:04 +000032
Denis Vlasenkof8ea0f32007-02-25 02:38:54 +000033/* ignored: -a "assume all files to be text" */
34/* ignored: -I "assume binary files have no matches" */
Denis Vlasenko385304d2007-02-25 02:38:20 +000035
36enum {
Denis Vlasenko4652daa2007-07-15 12:39:08 +000037 OPTBIT_l, /* list matched file names only */
38 OPTBIT_n, /* print line# */
Bernhard Reutner-Fischer636a1f82008-05-19 09:29:47 +000039 OPTBIT_q, /* quiet - exit(EXIT_SUCCESS) of first match */
Denis Vlasenko4652daa2007-07-15 12:39:08 +000040 OPTBIT_v, /* invert the match, to select non-matching lines */
41 OPTBIT_s, /* suppress errors about file open errors */
42 OPTBIT_c, /* count matches per file (suppresses normal output) */
43 OPTBIT_F, /* literal match */
44 OPTBIT_i, /* case-insensitive */
45 OPTBIT_H, /* force filename display */
46 OPTBIT_h, /* inhibit filename display */
47 OPTBIT_e, /* -e PATTERN */
48 OPTBIT_f, /* -f FILE_WITH_PATTERNS */
49 OPTBIT_L, /* list unmatched file names only */
50 OPTBIT_o, /* show only matching parts of lines */
51 OPTBIT_r, /* recurse dirs */
52 OPTBIT_m, /* -m MAX_MATCHES */
Denys Vlasenko05273da2010-04-26 08:45:44 +020053 OPTBIT_w, /* -w whole word match */
Denis Vlasenko5e34ff22009-04-21 11:09:40 +000054 IF_FEATURE_GREP_CONTEXT( OPTBIT_A ,) /* -A NUM: after-match context */
55 IF_FEATURE_GREP_CONTEXT( OPTBIT_B ,) /* -B NUM: before-match context */
56 IF_FEATURE_GREP_CONTEXT( OPTBIT_C ,) /* -C NUM: -A and -B combined */
57 IF_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
Denis Vlasenko5e34ff22009-04-21 11:09:40 +000058 IF_EXTRA_COMPAT( OPTBIT_z ,) /* input is NUL terminated */
Denis Vlasenko385304d2007-02-25 02:38:20 +000059 OPT_l = 1 << OPTBIT_l,
60 OPT_n = 1 << OPTBIT_n,
61 OPT_q = 1 << OPTBIT_q,
62 OPT_v = 1 << OPTBIT_v,
63 OPT_s = 1 << OPTBIT_s,
64 OPT_c = 1 << OPTBIT_c,
65 OPT_F = 1 << OPTBIT_F,
66 OPT_i = 1 << OPTBIT_i,
67 OPT_H = 1 << OPTBIT_H,
68 OPT_h = 1 << OPTBIT_h,
69 OPT_e = 1 << OPTBIT_e,
70 OPT_f = 1 << OPTBIT_f,
71 OPT_L = 1 << OPTBIT_L,
72 OPT_o = 1 << OPTBIT_o,
73 OPT_r = 1 << OPTBIT_r,
Denis Vlasenko4652daa2007-07-15 12:39:08 +000074 OPT_m = 1 << OPTBIT_m,
Denys Vlasenko05273da2010-04-26 08:45:44 +020075 OPT_w = 1 << OPTBIT_w,
Denis Vlasenko5e34ff22009-04-21 11:09:40 +000076 OPT_A = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_A)) + 0,
77 OPT_B = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_B)) + 0,
78 OPT_C = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_C)) + 0,
79 OPT_E = IF_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
Denis Vlasenko5e34ff22009-04-21 11:09:40 +000080 OPT_z = IF_EXTRA_COMPAT( (1 << OPTBIT_z)) + 0,
Denis Vlasenko385304d2007-02-25 02:38:20 +000081};
82
Denis Vlasenko9acfed22007-06-08 15:41:27 +000083#define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l)
84#define PRINT_LINE_NUM (option_mask32 & OPT_n)
85#define BE_QUIET (option_mask32 & OPT_q)
86#define SUPPRESS_ERR_MSGS (option_mask32 & OPT_s)
87#define PRINT_MATCH_COUNTS (option_mask32 & OPT_c)
88#define FGREP_FLAG (option_mask32 & OPT_F)
Denis Vlasenko385304d2007-02-25 02:38:20 +000089#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
Denis Vlasenko83518d12009-03-20 22:17:13 +000090#define NUL_DELIMITED (option_mask32 & OPT_z)
Eric Andersen8876fb22003-06-20 09:01:58 +000091
Denis Vlasenko04ea11b2007-09-10 12:18:32 +000092struct globals {
93 int max_matches;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +000094#if !ENABLE_EXTRA_COMPAT
Denis Vlasenko04ea11b2007-09-10 12:18:32 +000095 int reflags;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +000096#else
97 RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */
98#endif
Denis Vlasenko04ea11b2007-09-10 12:18:32 +000099 smalluint invert_search;
100 smalluint print_filename;
101 smalluint open_errors;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000102#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000103 smalluint did_print_line;
104 int lines_before;
105 int lines_after;
106 char **before_buf;
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000107 IF_EXTRA_COMPAT(size_t *before_buf_size;)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000108 int last_line_printed;
109#endif
110 /* globals used internally */
111 llist_t *pattern_head; /* growable list of patterns to match */
112 const char *cur_file; /* the current file we are reading */
Denys Vlasenko98a4c7c2010-02-04 15:00:15 +0100113} FIX_ALIASING;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000114#define G (*(struct globals*)&bb_common_bufsiz1)
Denis Vlasenko7049ff82008-06-25 09:53:17 +0000115#define INIT_G() do { \
116 struct G_sizecheck { \
117 char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
118 }; \
119} while (0)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000120#define max_matches (G.max_matches )
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000121#if !ENABLE_EXTRA_COMPAT
Denys Vlasenko09449632009-07-29 01:20:09 +0200122# define reflags (G.reflags )
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000123#else
Denys Vlasenko09449632009-07-29 01:20:09 +0200124# define case_fold (G.case_fold )
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000125/* http://www.delorie.com/gnu/docs/regex/regex_46.html */
Denys Vlasenko09449632009-07-29 01:20:09 +0200126# define reflags re_syntax_options
127# undef REG_NOSUB
128# undef REG_EXTENDED
129# undef REG_ICASE
130# define REG_NOSUB bug:is:here /* should not be used */
131/* Just RE_SYNTAX_EGREP is not enough, need to enable {n[,[m]]} too */
132# define REG_EXTENDED (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES)
133# define REG_ICASE bug:is:here /* should not be used */
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000134#endif
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000135#define invert_search (G.invert_search )
136#define print_filename (G.print_filename )
137#define open_errors (G.open_errors )
138#define did_print_line (G.did_print_line )
139#define lines_before (G.lines_before )
140#define lines_after (G.lines_after )
141#define before_buf (G.before_buf )
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000142#define before_buf_size (G.before_buf_size )
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000143#define last_line_printed (G.last_line_printed )
144#define pattern_head (G.pattern_head )
145#define cur_file (G.cur_file )
146
Mark Whitleyd3721892000-06-28 22:00:26 +0000147
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000148typedef struct grep_list_data_t {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000149 char *pattern;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000150/* for GNU regex, matched_range must be persistent across grep_file() calls */
151#if !ENABLE_EXTRA_COMPAT
152 regex_t compiled_regex;
153 regmatch_t matched_range;
154#else
155 struct re_pattern_buffer compiled_regex;
156 struct re_registers matched_range;
157#endif
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000158#define ALLOCATED 1
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000159#define COMPILED 2
160 int flg_mem_alocated_compiled;
161} grep_list_data_t;
Mark Whitleyfa43e542001-05-24 18:36:18 +0000162
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000163#if !ENABLE_EXTRA_COMPAT
164#define print_line(line, line_len, linenum, decoration) \
165 print_line(line, linenum, decoration)
166#endif
167static void print_line(const char *line, size_t line_len, int linenum, char decoration)
Mark Whitley2fd52982001-02-09 00:41:10 +0000168{
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000169#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000170 /* Happens when we go to next file, immediately hit match
171 * and try to print prev context... from prev file! Don't do it */
172 if (linenum < 1)
173 return;
Eric Andersenaff114c2004-04-14 17:51:38 +0000174 /* possibly print the little '--' separator */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000175 if ((lines_before || lines_after) && did_print_line
176 && last_line_printed != linenum - 1
177 ) {
Mark Whitley2fd52982001-02-09 00:41:10 +0000178 puts("--");
179 }
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000180 /* guard against printing "--" before first line of first file */
181 did_print_line = 1;
Mark Whitley2fd52982001-02-09 00:41:10 +0000182 last_line_printed = linenum;
183#endif
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000184 if (print_filename)
Mark Whitley2fd52982001-02-09 00:41:10 +0000185 printf("%s%c", cur_file, decoration);
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000186 if (PRINT_LINE_NUM)
Mark Whitley2fd52982001-02-09 00:41:10 +0000187 printf("%i%c", linenum, decoration);
Denis Vlasenko51937532006-09-29 20:58:53 +0000188 /* Emulate weird GNU grep behavior with -ov */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000189 if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o)) {
190#if !ENABLE_EXTRA_COMPAT
Denis Vlasenko51937532006-09-29 20:58:53 +0000191 puts(line);
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000192#else
193 fwrite(line, 1, line_len, stdout);
Denis Vlasenko83518d12009-03-20 22:17:13 +0000194 putchar(NUL_DELIMITED ? '\0' : '\n');
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000195#endif
196 }
Mark Whitley2fd52982001-02-09 00:41:10 +0000197}
Mark Whitleyd3721892000-06-28 22:00:26 +0000198
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000199#if ENABLE_EXTRA_COMPAT
200/* Unlike getline, this one removes trailing '\n' */
201static ssize_t FAST_FUNC bb_getline(char **line_ptr, size_t *line_alloc_len, FILE *file)
202{
203 ssize_t res_sz;
204 char *line;
Denis Vlasenko83518d12009-03-20 22:17:13 +0000205 int delim = (NUL_DELIMITED ? '\0' : '\n');
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000206
Denis Vlasenko83518d12009-03-20 22:17:13 +0000207 res_sz = getdelim(line_ptr, line_alloc_len, delim, file);
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000208 line = *line_ptr;
209
210 if (res_sz > 0) {
Denis Vlasenko83518d12009-03-20 22:17:13 +0000211 if (line[res_sz - 1] == delim)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000212 line[--res_sz] = '\0';
213 } else {
214 free(line); /* uclibc allocates a buffer even on EOF. WTF? */
215 }
216 return res_sz;
217}
218#endif
219
Eric Andersen8876fb22003-06-20 09:01:58 +0000220static int grep_file(FILE *file)
Mark Whitleyd3721892000-06-28 22:00:26 +0000221{
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000222 smalluint found;
Mark Whitleyd3721892000-06-28 22:00:26 +0000223 int linenum = 0;
Matt Kraaideb95f62000-08-06 15:25:53 +0000224 int nmatches = 0;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000225#if !ENABLE_EXTRA_COMPAT
226 char *line;
227#else
228 char *line = NULL;
229 ssize_t line_len;
230 size_t line_alloc_len;
Denys Vlasenko6dc0ace2009-12-04 02:48:14 +0100231# define rm_so start[0]
232# define rm_eo end[0]
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000233#endif
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000234#if ENABLE_FEATURE_GREP_CONTEXT
Mark Whitley2fd52982001-02-09 00:41:10 +0000235 int print_n_lines_after = 0;
236 int curpos = 0; /* track where we are in the circular 'before' buffer */
237 int idx = 0; /* used for iteration through the circular buffer */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000238#else
239 enum { print_n_lines_after = 0 };
Denys Vlasenko6dc0ace2009-12-04 02:48:14 +0100240#endif
Mark Whitleyd3721892000-06-28 22:00:26 +0000241
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000242 while (
243#if !ENABLE_EXTRA_COMPAT
244 (line = xmalloc_fgetline(file)) != NULL
245#else
246 (line_len = bb_getline(&line, &line_alloc_len, file)) >= 0
247#endif
248 ) {
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000249 llist_t *pattern_ptr = pattern_head;
Denis Vlasenko68102362007-11-04 00:46:03 +0000250 grep_list_data_t *gl = gl; /* for gcc */
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000251
Mark Whitleyd3721892000-06-28 22:00:26 +0000252 linenum++;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000253 found = 0;
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000254 while (pattern_ptr) {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000255 gl = (grep_list_data_t *)pattern_ptr->data;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000256 if (FGREP_FLAG) {
Denis Vlasenkoac074b32007-09-10 12:23:27 +0000257 found |= (strstr(line, gl->pattern) != NULL);
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000258 } else {
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000259 if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000260 gl->flg_mem_alocated_compiled |= COMPILED;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000261#if !ENABLE_EXTRA_COMPAT
262 xregcomp(&gl->compiled_regex, gl->pattern, reflags);
263#else
264 memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex));
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000265 gl->compiled_regex.translate = case_fold; /* for -i */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000266 if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex))
267 bb_error_msg_and_die("bad regex '%s'", gl->pattern);
268#endif
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000269 }
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000270#if !ENABLE_EXTRA_COMPAT
271 gl->matched_range.rm_so = 0;
272 gl->matched_range.rm_eo = 0;
273#endif
274 if (
275#if !ENABLE_EXTRA_COMPAT
276 regexec(&gl->compiled_regex, line, 1, &gl->matched_range, 0) == 0
277#else
278 re_search(&gl->compiled_regex, line, line_len,
279 /*start:*/ 0, /*range:*/ line_len,
280 &gl->matched_range) >= 0
281#endif
282 ) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000283 if (!(option_mask32 & OPT_w))
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000284 found = 1;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000285 else {
286 char c = ' ';
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000287 if (gl->matched_range.rm_so)
288 c = line[gl->matched_range.rm_so - 1];
Denis Vlasenko385304d2007-02-25 02:38:20 +0000289 if (!isalnum(c) && c != '_') {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000290 c = line[gl->matched_range.rm_eo];
Denis Vlasenko385304d2007-02-25 02:38:20 +0000291 if (!c || (!isalnum(c) && c != '_'))
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000292 found = 1;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000293 }
294 }
295 }
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000296 }
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000297 /* If it's non-inverted search, we can stop
298 * at first match */
299 if (found && !invert_search)
300 goto do_found;
Eric Andersen8876fb22003-06-20 09:01:58 +0000301 pattern_ptr = pattern_ptr->link;
302 } /* while (pattern_ptr) */
Mark Whitleyd3721892000-06-28 22:00:26 +0000303
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000304 if (found ^ invert_search) {
305 do_found:
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000306 /* keep track of matches */
307 nmatches++;
Mark Whitley1d9d4112001-05-21 21:13:00 +0000308
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000309 /* quiet/print (non)matching file names only? */
310 if (option_mask32 & (OPT_q|OPT_l|OPT_L)) {
311 free(line); /* we don't need line anymore */
312 if (BE_QUIET) {
313 /* manpage says about -q:
314 * "exit immediately with zero status
315 * if any match is found,
316 * even if errors were detected" */
Bernhard Reutner-Fischer636a1f82008-05-19 09:29:47 +0000317 exit(EXIT_SUCCESS);
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000318 }
319 /* if we're just printing filenames, we stop after the first match */
320 if (PRINT_FILES_WITH_MATCHES) {
321 puts(cur_file);
Bernhard Reutner-Fischera985d302008-02-11 11:44:38 +0000322 /* fall through to "return 1" */
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000323 }
324 /* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
325 return 1; /* one match */
326 }
Mark Whitley1d9d4112001-05-21 21:13:00 +0000327
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000328#if ENABLE_FEATURE_GREP_CONTEXT
329 /* Were we printing context and saw next (unwanted) match? */
330 if ((option_mask32 & OPT_m) && nmatches > max_matches)
331 break;
332#endif
333
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000334 /* print the matched line */
335 if (PRINT_MATCH_COUNTS == 0) {
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000336#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000337 int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
Mark Whitley2fd52982001-02-09 00:41:10 +0000338
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000339 /* if we were told to print 'before' lines and there is at least
340 * one line in the circular buffer, print them */
341 if (lines_before && before_buf[prevpos] != NULL) {
342 int first_buf_entry_line_num = linenum - lines_before;
Mark Whitley2fd52982001-02-09 00:41:10 +0000343
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000344 /* advance to the first entry in the circular buffer, and
345 * figure out the line number is of the first line in the
346 * buffer */
347 idx = curpos;
348 while (before_buf[idx] == NULL) {
349 idx = (idx + 1) % lines_before;
350 first_buf_entry_line_num++;
Mark Whitley2fd52982001-02-09 00:41:10 +0000351 }
352
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000353 /* now print each line in the buffer, clearing them as we go */
354 while (before_buf[idx] != NULL) {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000355 print_line(before_buf[idx], before_buf_size[idx], first_buf_entry_line_num, '-');
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000356 free(before_buf[idx]);
357 before_buf[idx] = NULL;
358 idx = (idx + 1) % lines_before;
359 first_buf_entry_line_num++;
360 }
361 }
362
363 /* make a note that we need to print 'after' lines */
364 print_n_lines_after = lines_after;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000365#endif
Denis Vlasenko385304d2007-02-25 02:38:20 +0000366 if (option_mask32 & OPT_o) {
Denis Vlasenko68102362007-11-04 00:46:03 +0000367 if (FGREP_FLAG) {
368 /* -Fo just prints the pattern
369 * (unless -v: -Fov doesnt print anything at all) */
370 if (found)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000371 print_line(gl->pattern, strlen(gl->pattern), linenum, ':');
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000372 } else while (1) {
Denys Vlasenko09449632009-07-29 01:20:09 +0200373 unsigned end = gl->matched_range.rm_eo;
374 char old = line[end];
375 line[end] = '\0';
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000376 print_line(line + gl->matched_range.rm_so,
Denys Vlasenko09449632009-07-29 01:20:09 +0200377 end - gl->matched_range.rm_so,
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000378 linenum, ':');
Denys Vlasenko6dc0ace2009-12-04 02:48:14 +0100379 if (old == '\0')
380 break;
Denys Vlasenko09449632009-07-29 01:20:09 +0200381 line[end] = old;
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000382#if !ENABLE_EXTRA_COMPAT
Denys Vlasenko09449632009-07-29 01:20:09 +0200383 if (regexec(&gl->compiled_regex, line + end,
384 1, &gl->matched_range, REG_NOTBOL) != 0)
385 break;
386 gl->matched_range.rm_so += end;
387 gl->matched_range.rm_eo += end;
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000388#else
389 if (re_search(&gl->compiled_regex, line, line_len,
Denys Vlasenko09449632009-07-29 01:20:09 +0200390 end, line_len - end,
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000391 &gl->matched_range) < 0)
392 break;
393#endif
Denis Vlasenkoa9acbe62008-11-24 13:25:20 +0000394 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000395 } else {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000396 print_line(line, line_len, linenum, ':');
Mark Whitley2fd52982001-02-09 00:41:10 +0000397 }
Matt Kraai0810f722001-01-04 15:11:52 +0000398 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000399 }
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000400#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000401 else { /* no match */
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000402 /* if we need to print some context lines after the last match, do so */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000403 if (print_n_lines_after) {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000404 print_line(line, strlen(line), linenum, '-');
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000405 print_n_lines_after--;
406 } else if (lines_before) {
407 /* Add the line to the circular 'before' buffer */
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000408 free(before_buf[curpos]);
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000409 before_buf[curpos] = line;
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000410 IF_EXTRA_COMPAT(before_buf_size[curpos] = line_len;)
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000411 curpos = (curpos + 1) % lines_before;
Denis Vlasenko1d426652008-03-17 09:09:09 +0000412 /* avoid free(line) - we took the line */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000413 line = NULL;
Mark Whitley2fd52982001-02-09 00:41:10 +0000414 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000415 }
Mark Whitley2fd52982001-02-09 00:41:10 +0000416
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000417#endif /* ENABLE_FEATURE_GREP_CONTEXT */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000418#if !ENABLE_EXTRA_COMPAT
Mark Whitleyd3721892000-06-28 22:00:26 +0000419 free(line);
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000420#endif
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000421 /* Did we print all context after last requested match? */
422 if ((option_mask32 & OPT_m)
Denis Vlasenko83518d12009-03-20 22:17:13 +0000423 && !print_n_lines_after
424 && nmatches == max_matches
425 ) {
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000426 break;
Denis Vlasenko83518d12009-03-20 22:17:13 +0000427 }
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000428 } /* while (read line) */
Mark Whitley8f122432000-07-18 18:37:01 +0000429
Mark Whitley35e59be2001-05-14 19:40:32 +0000430 /* special-case file post-processing for options where we don't print line
Mark Whitley1d9d4112001-05-21 21:13:00 +0000431 * matches, just filenames and possibly match counts */
Mark Whitley35e59be2001-05-14 19:40:32 +0000432
Mark Whitley1d9d4112001-05-21 21:13:00 +0000433 /* grep -c: print [filename:]count, even if count is zero */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000434 if (PRINT_MATCH_COUNTS) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000435 if (print_filename)
Mark Whitley1d9d4112001-05-21 21:13:00 +0000436 printf("%s:", cur_file);
Denis Vlasenko92758142006-10-03 19:56:34 +0000437 printf("%d\n", nmatches);
Mark Whitley35e59be2001-05-14 19:40:32 +0000438 }
Mark Whitley1d9d4112001-05-21 21:13:00 +0000439
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000440 /* grep -L: print just the filename */
441 if (PRINT_FILES_WITHOUT_MATCHES) {
442 /* nmatches is zero, no need to check it:
443 * we return 1 early if we detected a match
444 * and PRINT_FILES_WITHOUT_MATCHES is set */
Eric Andersendec7f812004-05-26 11:47:55 +0000445 puts(cur_file);
446 }
447
Eric Andersen8876fb22003-06-20 09:01:58 +0000448 return nmatches;
Mark Whitleyd3721892000-06-28 22:00:26 +0000449}
Eric Andersencc8ed391999-10-05 16:24:54 +0000450
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000451#if ENABLE_FEATURE_CLEAN_UP
452#define new_grep_list_data(p, m) add_grep_list_data(p, m)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000453static char *add_grep_list_data(char *pattern, int flg_used_mem)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000454#else
455#define new_grep_list_data(p, m) add_grep_list_data(p)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000456static char *add_grep_list_data(char *pattern)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000457#endif
458{
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000459 grep_list_data_t *gl = xzalloc(sizeof(*gl));
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000460 gl->pattern = pattern;
461#if ENABLE_FEATURE_CLEAN_UP
462 gl->flg_mem_alocated_compiled = flg_used_mem;
463#else
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000464 /*gl->flg_mem_alocated_compiled = 0;*/
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000465#endif
466 return (char *)gl;
467}
468
Eric Andersen8876fb22003-06-20 09:01:58 +0000469static void load_regexes_from_file(llist_t *fopt)
Mark Whitleyfa43e542001-05-24 18:36:18 +0000470{
471 char *line;
Eric Andersen8876fb22003-06-20 09:01:58 +0000472 FILE *f;
473
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000474 while (fopt) {
Eric Andersen8876fb22003-06-20 09:01:58 +0000475 llist_t *cur = fopt;
476 char *ffile = cur->data;
477
478 fopt = cur->link;
479 free(cur);
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000480 f = xfopen_stdin(ffile);
Denis Vlasenko8ee649a2008-03-26 20:04:27 +0000481 while ((line = xmalloc_fgetline(f)) != NULL) {
Rob Landley8bb50782006-05-26 23:44:51 +0000482 llist_add_to(&pattern_head,
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000483 new_grep_list_data(line, ALLOCATED));
Eric Andersen31c27a92004-10-08 08:10:57 +0000484 }
Mark Whitleyfa43e542001-05-24 18:36:18 +0000485 }
486}
Mark Whitleyfa43e542001-05-24 18:36:18 +0000487
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +0000488static int FAST_FUNC file_action_grep(const char *filename,
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000489 struct stat *statbuf UNUSED_PARAM,
Denis Vlasenko1d426652008-03-17 09:09:09 +0000490 void* matched,
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000491 int depth UNUSED_PARAM)
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000492{
Denis Vlasenko5415c852008-07-21 23:05:26 +0000493 FILE *file = fopen_for_read(filename);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000494 if (file == NULL) {
495 if (!SUPPRESS_ERR_MSGS)
Denis Vlasenko8e8200a2008-01-24 01:30:36 +0000496 bb_simple_perror_msg(filename);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000497 open_errors = 1;
498 return 0;
499 }
500 cur_file = filename;
501 *(int*)matched += grep_file(file);
Denis Vlasenkobf392162006-10-15 18:38:01 +0000502 fclose(file);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000503 return 1;
504}
505
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000506static int grep_dir(const char *dir)
507{
508 int matched = 0;
509 recursive_action(dir,
Denis Vlasenkobbd695d2007-04-08 10:52:28 +0000510 /* recurse=yes */ ACTION_RECURSE |
511 /* followLinks=no */
512 /* depthFirst=yes */ ACTION_DEPTHFIRST,
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000513 /* fileAction= */ file_action_grep,
514 /* dirAction= */ NULL,
Denis Vlasenko8c35d652006-10-27 23:42:25 +0000515 /* userData= */ &matched,
516 /* depth= */ 0);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000517 return matched;
518}
519
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000520int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100521int grep_main(int argc UNUSED_PARAM, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +0000522{
Eric Andersen8876fb22003-06-20 09:01:58 +0000523 FILE *file;
524 int matched;
Eric Andersen31c27a92004-10-08 08:10:57 +0000525 llist_t *fopt = NULL;
Matt Kraai999623e2001-10-29 15:49:03 +0000526
Mark Whitleyd3721892000-06-28 22:00:26 +0000527 /* do normal option parsing */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000528#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko1d426652008-03-17 09:09:09 +0000529 int Copt;
Eric Andersen8876fb22003-06-20 09:01:58 +0000530
Denis Vlasenko1d426652008-03-17 09:09:09 +0000531 /* -H unsets -h; -C unsets -A,-B; -e,-f are lists;
532 * -m,-A,-B,-C have numeric param */
533 opt_complementary = "H-h:C-AB:e::f::m+:A+:B+:C+";
Denis Vlasenkofe7cd642007-08-18 15:32:12 +0000534 getopt32(argv,
Denis Vlasenko385304d2007-02-25 02:38:20 +0000535 OPTSTR_GREP,
Denis Vlasenko1d426652008-03-17 09:09:09 +0000536 &pattern_head, &fopt, &max_matches,
537 &lines_after, &lines_before, &Copt);
Eric Andersen8876fb22003-06-20 09:01:58 +0000538
Denis Vlasenko385304d2007-02-25 02:38:20 +0000539 if (option_mask32 & OPT_C) {
Denis Vlasenko2295b492006-10-22 11:42:51 +0000540 /* -C unsets prev -A and -B, but following -A or -B
541 may override it */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000542 if (!(option_mask32 & OPT_A)) /* not overridden */
Denis Vlasenko1d426652008-03-17 09:09:09 +0000543 lines_after = Copt;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000544 if (!(option_mask32 & OPT_B)) /* not overridden */
Denis Vlasenko1d426652008-03-17 09:09:09 +0000545 lines_before = Copt;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000546 }
Denis Vlasenko2295b492006-10-22 11:42:51 +0000547 /* sanity checks */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000548 if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
549 option_mask32 &= ~OPT_n;
Eric Andersen8876fb22003-06-20 09:01:58 +0000550 lines_before = 0;
551 lines_after = 0;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000552 } else if (lines_before > 0) {
553 before_buf = xzalloc(lines_before * sizeof(before_buf[0]));
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000554 IF_EXTRA_COMPAT(before_buf_size = xzalloc(lines_before * sizeof(before_buf_size[0]));)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000555 }
Eric Andersen8876fb22003-06-20 09:01:58 +0000556#else
557 /* with auto sanity checks */
Denis Vlasenko1d426652008-03-17 09:09:09 +0000558 /* -H unsets -h; -c,-q or -l unset -n; -e,-f are lists; -m N */
559 opt_complementary = "H-h:c-n:q-n:l-n:e::f::m+";
Denis Vlasenkofe7cd642007-08-18 15:32:12 +0000560 getopt32(argv, OPTSTR_GREP,
Denis Vlasenko1d426652008-03-17 09:09:09 +0000561 &pattern_head, &fopt, &max_matches);
Eric Andersen8876fb22003-06-20 09:01:58 +0000562#endif
Denis Vlasenko385304d2007-02-25 02:38:20 +0000563 invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000564
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000565 if (pattern_head != NULL) {
Bernhard Reutner-Fischerfebe3c42007-04-04 20:52:03 +0000566 /* convert char **argv to grep_list_data_t */
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000567 llist_t *cur;
568
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000569 for (cur = pattern_head; cur; cur = cur->link)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000570 cur->data = new_grep_list_data(cur->data, 0);
571 }
Denis Vlasenko385304d2007-02-25 02:38:20 +0000572 if (option_mask32 & OPT_f)
Eric Andersen8876fb22003-06-20 09:01:58 +0000573 load_regexes_from_file(fopt);
574
Denis Vlasenko8f8f2682006-10-03 21:00:43 +0000575 if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
Denis Vlasenko385304d2007-02-25 02:38:20 +0000576 option_mask32 |= OPT_F;
Mike Frysinger15ca5862005-07-31 22:41:05 +0000577
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000578#if !ENABLE_EXTRA_COMPAT
Denis Vlasenko385304d2007-02-25 02:38:20 +0000579 if (!(option_mask32 & (OPT_o | OPT_w)))
Denis Vlasenko51937532006-09-29 20:58:53 +0000580 reflags = REG_NOSUB;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000581#endif
Denis Vlasenko51937532006-09-29 20:58:53 +0000582
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000583 if (ENABLE_FEATURE_GREP_EGREP_ALIAS
584 && (applet_name[0] == 'e' || (option_mask32 & OPT_E))
585 ) {
Denis Vlasenko51937532006-09-29 20:58:53 +0000586 reflags |= REG_EXTENDED;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000587 }
Denis Vlasenko9ac706b2008-09-19 21:32:51 +0000588#if ENABLE_EXTRA_COMPAT
589 else {
590 reflags = RE_SYNTAX_GREP;
591 }
592#endif
Eric Andersen8876fb22003-06-20 09:01:58 +0000593
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000594 if (option_mask32 & OPT_i) {
595#if !ENABLE_EXTRA_COMPAT
Eric Andersen8876fb22003-06-20 09:01:58 +0000596 reflags |= REG_ICASE;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000597#else
598 int i;
599 case_fold = xmalloc(256);
600 for (i = 0; i < 256; i++)
601 case_fold[i] = (unsigned char)i;
602 for (i = 'a'; i <= 'z'; i++)
603 case_fold[i] = (unsigned char)(i - ('a' - 'A'));
604#endif
605 }
Eric Andersen8876fb22003-06-20 09:01:58 +0000606
607 argv += optind;
Eric Andersen053b1462000-06-13 06:24:53 +0000608
Denis Vlasenko1d426652008-03-17 09:09:09 +0000609 /* if we didn't get a pattern from -e and no command file was specified,
610 * first parameter should be the pattern. no pattern, no worky */
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000611 if (pattern_head == NULL) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000612 char *pattern;
Eric Andersen8876fb22003-06-20 09:01:58 +0000613 if (*argv == NULL)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000614 bb_show_usage();
Denis Vlasenko385304d2007-02-25 02:38:20 +0000615 pattern = new_grep_list_data(*argv++, 0);
616 llist_add_to(&pattern_head, pattern);
Mark Whitleyfa43e542001-05-24 18:36:18 +0000617 }
Mark Whitleyd3721892000-06-28 22:00:26 +0000618
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000619 /* argv[0..(argc-1)] should be names of file to grep through. If
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000620 * there is more than one file to grep, we will print the filenames. */
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100621 if (argv[0] && argv[1])
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000622 print_filename = 1;
Denis Vlasenko2295b492006-10-22 11:42:51 +0000623 /* -H / -h of course override */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000624 if (option_mask32 & OPT_H)
Denis Vlasenko2295b492006-10-22 11:42:51 +0000625 print_filename = 1;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000626 if (option_mask32 & OPT_h)
Denis Vlasenko2295b492006-10-22 11:42:51 +0000627 print_filename = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000628
Mark Whitley2e1148b2000-06-28 22:59:30 +0000629 /* If no files were specified, or '-' was specified, take input from
630 * stdin. Otherwise, we grep through all the files specified. */
Eric Andersen8876fb22003-06-20 09:01:58 +0000631 matched = 0;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000632 do {
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100633 cur_file = *argv;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000634 file = stdin;
Denis Vlasenko1d426652008-03-17 09:09:09 +0000635 if (!cur_file || LONE_DASH(cur_file)) {
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000636 cur_file = "(standard input)";
Eric Andersen8876fb22003-06-20 09:01:58 +0000637 } else {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000638 if (option_mask32 & OPT_r) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000639 struct stat st;
640 if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000641 if (!(option_mask32 & OPT_h))
Denis Vlasenko3544ae62006-10-14 14:51:59 +0000642 print_filename = 1;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000643 matched += grep_dir(cur_file);
644 goto grep_done;
645 }
Mark Whitley2ef880b2000-07-18 21:02:06 +0000646 }
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000647 /* else: fopen(dir) will succeed, but reading won't */
Denis Vlasenko5415c852008-07-21 23:05:26 +0000648 file = fopen_for_read(cur_file);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000649 if (file == NULL) {
650 if (!SUPPRESS_ERR_MSGS)
Denis Vlasenko0c97c9d2007-10-01 11:58:38 +0000651 bb_simple_perror_msg(cur_file);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000652 open_errors = 1;
653 continue;
654 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000655 }
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000656 matched += grep_file(file);
Denis Vlasenkoddec5af2006-10-26 23:25:17 +0000657 fclose_if_not_stdin(file);
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000658 grep_done: ;
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100659 } while (*argv && *++argv);
Eric Andersen8876fb22003-06-20 09:01:58 +0000660
Eric Andersen8876fb22003-06-20 09:01:58 +0000661 /* destroy all the elments in the pattern list */
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000662 if (ENABLE_FEATURE_CLEAN_UP) {
663 while (pattern_head) {
664 llist_t *pattern_head_ptr = pattern_head;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000665 grep_list_data_t *gl = (grep_list_data_t *)pattern_head_ptr->data;
Eric Andersen8876fb22003-06-20 09:01:58 +0000666
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000667 pattern_head = pattern_head->link;
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000668 if (gl->flg_mem_alocated_compiled & ALLOCATED)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000669 free(gl->pattern);
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000670 if (gl->flg_mem_alocated_compiled & COMPILED)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000671 regfree(&gl->compiled_regex);
Mike Frysinger3a62a732007-04-12 18:29:27 +0000672 free(gl);
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000673 free(pattern_head_ptr);
674 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000675 }
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000676 /* 0 = success, 1 = failed, 2 = error */
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000677 if (open_errors)
"Vladimir N. Oleynik"bf449742005-09-23 13:50:24 +0000678 return 2;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000679 return !matched; /* invert return value: 0 = success, 1 = failed */
Eric Andersencc8ed391999-10-05 16:24:54 +0000680}