blob: ac290a911d898702f15ba498b98c129745c6c4eb [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
Denys Vlasenko4f731ce2010-06-15 15:40:16 +020017 *
Denis Vlasenko51937532006-09-29 20:58:53 +000018 * (C) 2006 Jac Goudsmit added -o option
19 */
Eric Andersencc8ed391999-10-05 16:24:54 +000020
Denys Vlasenko4f731ce2010-06-15 15:40:16 +020021//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))
24
Denys Vlasenko7fb68f12010-05-09 04:22:48 +020025//kbuild:lib-$(CONFIG_GREP) += grep.o
Denys Vlasenko4f731ce2010-06-15 15:40:16 +020026
Denys Vlasenko7fb68f12010-05-09 04:22:48 +020027//config:config GREP
28//config: bool "grep"
Denys Vlasenko2f32bf82010-06-06 04:14:28 +020029//config: default y
Denys Vlasenko7fb68f12010-05-09 04:22:48 +020030//config: help
31//config: grep is used to search files for a specified pattern.
32//config:
33//config:config FEATURE_GREP_EGREP_ALIAS
34//config: bool "Enable extended regular expressions (egrep & grep -E)"
35//config: default y
36//config: depends on GREP
37//config: help
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.
41//config:
42//config:config FEATURE_GREP_FGREP_ALIAS
43//config: bool "Alias fgrep to grep -F"
44//config: default y
45//config: depends on GREP
46//config: help
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.
50//config:
51//config:config FEATURE_GREP_CONTEXT
52//config: bool "Enable before and after context flags (-A, -B and -C)"
53//config: default y
54//config: depends on GREP
55//config: help
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).
59
Denis Vlasenkob6adbf12007-05-26 19:00:18 +000060#include "libbb.h"
"Vladimir N. Oleynik"23f62fc2005-09-14 16:59:11 +000061#include "xregex.h"
Mark Whitleyd3721892000-06-28 22:00:26 +000062
Denys Vlasenko4f731ce2010-06-15 15:40:16 +020063
Mark Whitleyd3721892000-06-28 22:00:26 +000064/* options */
Denys Vlasenko4f731ce2010-06-15 15:40:16 +020065//usage:#define grep_trivial_usage
66//usage: "[-HhnlLoqvsriw"
67//usage: "F"
68//usage: IF_FEATURE_GREP_EGREP_ALIAS("E")
69//usage: IF_EXTRA_COMPAT("z")
70//usage: "] [-m N] "
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"
75//usage: "\nOptions:"
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"
92//usage: )
93//usage: IF_EXTRA_COMPAT(
94//usage: "\n -z Input is NUL terminated"
95//usage: )
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'"
101//usage: )
102//usage: "\n -e PTRN Pattern to match"
103//usage: "\n -f FILE Read pattern from file"
104//usage:
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"
110//usage:
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 ""
115
Denis Vlasenko385304d2007-02-25 02:38:20 +0000116#define OPTSTR_GREP \
Denys Vlasenko05273da2010-04-26 08:45:44 +0200117 "lnqvscFiHhe:f:Lorm:w" \
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000118 IF_FEATURE_GREP_CONTEXT("A:B:C:") \
119 IF_FEATURE_GREP_EGREP_ALIAS("E") \
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000120 IF_EXTRA_COMPAT("z") \
Denis Vlasenkof8ea0f32007-02-25 02:38:54 +0000121 "aI"
122/* ignored: -a "assume all files to be text" */
123/* ignored: -I "assume binary files have no matches" */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000124enum {
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000125 OPTBIT_l, /* list matched file names only */
126 OPTBIT_n, /* print line# */
Bernhard Reutner-Fischer636a1f82008-05-19 09:29:47 +0000127 OPTBIT_q, /* quiet - exit(EXIT_SUCCESS) of first match */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000128 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 */
Denys Vlasenko05273da2010-04-26 08:45:44 +0200141 OPTBIT_w, /* -w whole word match */
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000142 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 */
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000146 IF_EXTRA_COMPAT( OPTBIT_z ,) /* input is NUL terminated */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000147 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,
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000162 OPT_m = 1 << OPTBIT_m,
Denys Vlasenko05273da2010-04-26 08:45:44 +0200163 OPT_w = 1 << OPTBIT_w,
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000164 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,
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000168 OPT_z = IF_EXTRA_COMPAT( (1 << OPTBIT_z)) + 0,
Denis Vlasenko385304d2007-02-25 02:38:20 +0000169};
170
Denis Vlasenko9acfed22007-06-08 15:41:27 +0000171#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)
Denis Vlasenko385304d2007-02-25 02:38:20 +0000177#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
Denis Vlasenko83518d12009-03-20 22:17:13 +0000178#define NUL_DELIMITED (option_mask32 & OPT_z)
Eric Andersen8876fb22003-06-20 09:01:58 +0000179
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000180struct globals {
181 int max_matches;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000182#if !ENABLE_EXTRA_COMPAT
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000183 int reflags;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000184#else
185 RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */
186#endif
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000187 smalluint invert_search;
188 smalluint print_filename;
189 smalluint open_errors;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000190#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000191 smalluint did_print_line;
192 int lines_before;
193 int lines_after;
194 char **before_buf;
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000195 IF_EXTRA_COMPAT(size_t *before_buf_size;)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000196 int last_line_printed;
197#endif
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 */
Denys Vlasenko98a4c7c2010-02-04 15:00:15 +0100201} FIX_ALIASING;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000202#define G (*(struct globals*)&bb_common_bufsiz1)
Denis Vlasenko7049ff82008-06-25 09:53:17 +0000203#define INIT_G() do { \
204 struct G_sizecheck { \
205 char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
206 }; \
207} while (0)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000208#define max_matches (G.max_matches )
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000209#if !ENABLE_EXTRA_COMPAT
Denys Vlasenko09449632009-07-29 01:20:09 +0200210# define reflags (G.reflags )
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000211#else
Denys Vlasenko09449632009-07-29 01:20:09 +0200212# define case_fold (G.case_fold )
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000213/* http://www.delorie.com/gnu/docs/regex/regex_46.html */
Denys Vlasenko09449632009-07-29 01:20:09 +0200214# define reflags re_syntax_options
215# undef REG_NOSUB
216# undef REG_EXTENDED
217# undef REG_ICASE
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 */
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000222#endif
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000223#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 )
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000230#define before_buf_size (G.before_buf_size )
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000231#define last_line_printed (G.last_line_printed )
232#define pattern_head (G.pattern_head )
233#define cur_file (G.cur_file )
234
Mark Whitleyd3721892000-06-28 22:00:26 +0000235
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000236typedef struct grep_list_data_t {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000237 char *pattern;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000238/* 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;
242#else
243 struct re_pattern_buffer compiled_regex;
244 struct re_registers matched_range;
245#endif
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000246#define ALLOCATED 1
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000247#define COMPILED 2
248 int flg_mem_alocated_compiled;
249} grep_list_data_t;
Mark Whitleyfa43e542001-05-24 18:36:18 +0000250
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000251#if !ENABLE_EXTRA_COMPAT
252#define print_line(line, line_len, linenum, decoration) \
253 print_line(line, linenum, decoration)
254#endif
255static void print_line(const char *line, size_t line_len, int linenum, char decoration)
Mark Whitley2fd52982001-02-09 00:41:10 +0000256{
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000257#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000258 /* Happens when we go to next file, immediately hit match
259 * and try to print prev context... from prev file! Don't do it */
260 if (linenum < 1)
261 return;
Eric Andersenaff114c2004-04-14 17:51:38 +0000262 /* possibly print the little '--' separator */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000263 if ((lines_before || lines_after) && did_print_line
264 && last_line_printed != linenum - 1
265 ) {
Mark Whitley2fd52982001-02-09 00:41:10 +0000266 puts("--");
267 }
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000268 /* guard against printing "--" before first line of first file */
269 did_print_line = 1;
Mark Whitley2fd52982001-02-09 00:41:10 +0000270 last_line_printed = linenum;
271#endif
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000272 if (print_filename)
Mark Whitley2fd52982001-02-09 00:41:10 +0000273 printf("%s%c", cur_file, decoration);
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000274 if (PRINT_LINE_NUM)
Mark Whitley2fd52982001-02-09 00:41:10 +0000275 printf("%i%c", linenum, decoration);
Denis Vlasenko51937532006-09-29 20:58:53 +0000276 /* Emulate weird GNU grep behavior with -ov */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000277 if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o)) {
278#if !ENABLE_EXTRA_COMPAT
Denis Vlasenko51937532006-09-29 20:58:53 +0000279 puts(line);
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000280#else
281 fwrite(line, 1, line_len, stdout);
Denis Vlasenko83518d12009-03-20 22:17:13 +0000282 putchar(NUL_DELIMITED ? '\0' : '\n');
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000283#endif
284 }
Mark Whitley2fd52982001-02-09 00:41:10 +0000285}
Mark Whitleyd3721892000-06-28 22:00:26 +0000286
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000287#if ENABLE_EXTRA_COMPAT
288/* Unlike getline, this one removes trailing '\n' */
289static ssize_t FAST_FUNC bb_getline(char **line_ptr, size_t *line_alloc_len, FILE *file)
290{
291 ssize_t res_sz;
292 char *line;
Denis Vlasenko83518d12009-03-20 22:17:13 +0000293 int delim = (NUL_DELIMITED ? '\0' : '\n');
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000294
Denis Vlasenko83518d12009-03-20 22:17:13 +0000295 res_sz = getdelim(line_ptr, line_alloc_len, delim, file);
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000296 line = *line_ptr;
297
298 if (res_sz > 0) {
Denis Vlasenko83518d12009-03-20 22:17:13 +0000299 if (line[res_sz - 1] == delim)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000300 line[--res_sz] = '\0';
301 } else {
302 free(line); /* uclibc allocates a buffer even on EOF. WTF? */
303 }
304 return res_sz;
305}
306#endif
307
Eric Andersen8876fb22003-06-20 09:01:58 +0000308static int grep_file(FILE *file)
Mark Whitleyd3721892000-06-28 22:00:26 +0000309{
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000310 smalluint found;
Mark Whitleyd3721892000-06-28 22:00:26 +0000311 int linenum = 0;
Matt Kraaideb95f62000-08-06 15:25:53 +0000312 int nmatches = 0;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000313#if !ENABLE_EXTRA_COMPAT
314 char *line;
315#else
316 char *line = NULL;
317 ssize_t line_len;
318 size_t line_alloc_len;
Denys Vlasenko6dc0ace2009-12-04 02:48:14 +0100319# define rm_so start[0]
320# define rm_eo end[0]
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000321#endif
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000322#if ENABLE_FEATURE_GREP_CONTEXT
Mark Whitley2fd52982001-02-09 00:41:10 +0000323 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 */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000326#else
327 enum { print_n_lines_after = 0 };
Denys Vlasenko6dc0ace2009-12-04 02:48:14 +0100328#endif
Mark Whitleyd3721892000-06-28 22:00:26 +0000329
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000330 while (
331#if !ENABLE_EXTRA_COMPAT
332 (line = xmalloc_fgetline(file)) != NULL
333#else
334 (line_len = bb_getline(&line, &line_alloc_len, file)) >= 0
335#endif
336 ) {
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000337 llist_t *pattern_ptr = pattern_head;
Denis Vlasenko68102362007-11-04 00:46:03 +0000338 grep_list_data_t *gl = gl; /* for gcc */
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000339
Mark Whitleyd3721892000-06-28 22:00:26 +0000340 linenum++;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000341 found = 0;
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000342 while (pattern_ptr) {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000343 gl = (grep_list_data_t *)pattern_ptr->data;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000344 if (FGREP_FLAG) {
Ian Wienand0a2c7932010-04-30 09:32:10 +0200345 found |= (((option_mask32 & OPT_i)
346 ? strcasestr(line, gl->pattern)
347 : strstr(line, gl->pattern)
348 ) != NULL);
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000349 } else {
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000350 if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000351 gl->flg_mem_alocated_compiled |= COMPILED;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000352#if !ENABLE_EXTRA_COMPAT
353 xregcomp(&gl->compiled_regex, gl->pattern, reflags);
354#else
355 memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex));
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000356 gl->compiled_regex.translate = case_fold; /* for -i */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000357 if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex))
358 bb_error_msg_and_die("bad regex '%s'", gl->pattern);
359#endif
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000360 }
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000361#if !ENABLE_EXTRA_COMPAT
362 gl->matched_range.rm_so = 0;
363 gl->matched_range.rm_eo = 0;
364#endif
365 if (
366#if !ENABLE_EXTRA_COMPAT
367 regexec(&gl->compiled_regex, line, 1, &gl->matched_range, 0) == 0
368#else
369 re_search(&gl->compiled_regex, line, line_len,
370 /*start:*/ 0, /*range:*/ line_len,
371 &gl->matched_range) >= 0
372#endif
373 ) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000374 if (!(option_mask32 & OPT_w))
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000375 found = 1;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000376 else {
377 char c = ' ';
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000378 if (gl->matched_range.rm_so)
379 c = line[gl->matched_range.rm_so - 1];
Denis Vlasenko385304d2007-02-25 02:38:20 +0000380 if (!isalnum(c) && c != '_') {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000381 c = line[gl->matched_range.rm_eo];
Denis Vlasenko385304d2007-02-25 02:38:20 +0000382 if (!c || (!isalnum(c) && c != '_'))
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000383 found = 1;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000384 }
385 }
386 }
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000387 }
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000388 /* If it's non-inverted search, we can stop
389 * at first match */
390 if (found && !invert_search)
391 goto do_found;
Eric Andersen8876fb22003-06-20 09:01:58 +0000392 pattern_ptr = pattern_ptr->link;
393 } /* while (pattern_ptr) */
Mark Whitleyd3721892000-06-28 22:00:26 +0000394
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000395 if (found ^ invert_search) {
396 do_found:
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000397 /* keep track of matches */
398 nmatches++;
Mark Whitley1d9d4112001-05-21 21:13:00 +0000399
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000400 /* 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 */
403 if (BE_QUIET) {
404 /* manpage says about -q:
405 * "exit immediately with zero status
406 * if any match is found,
407 * even if errors were detected" */
Bernhard Reutner-Fischer636a1f82008-05-19 09:29:47 +0000408 exit(EXIT_SUCCESS);
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000409 }
410 /* if we're just printing filenames, we stop after the first match */
411 if (PRINT_FILES_WITH_MATCHES) {
412 puts(cur_file);
Bernhard Reutner-Fischera985d302008-02-11 11:44:38 +0000413 /* fall through to "return 1" */
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000414 }
415 /* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
416 return 1; /* one match */
417 }
Mark Whitley1d9d4112001-05-21 21:13:00 +0000418
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000419#if ENABLE_FEATURE_GREP_CONTEXT
420 /* Were we printing context and saw next (unwanted) match? */
421 if ((option_mask32 & OPT_m) && nmatches > max_matches)
422 break;
423#endif
424
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000425 /* print the matched line */
426 if (PRINT_MATCH_COUNTS == 0) {
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000427#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000428 int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
Mark Whitley2fd52982001-02-09 00:41:10 +0000429
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000430 /* 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;
Mark Whitley2fd52982001-02-09 00:41:10 +0000434
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000435 /* advance to the first entry in the circular buffer, and
436 * figure out the line number is of the first line in the
437 * buffer */
438 idx = curpos;
439 while (before_buf[idx] == NULL) {
440 idx = (idx + 1) % lines_before;
441 first_buf_entry_line_num++;
Mark Whitley2fd52982001-02-09 00:41:10 +0000442 }
443
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000444 /* now print each line in the buffer, clearing them as we go */
445 while (before_buf[idx] != NULL) {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000446 print_line(before_buf[idx], before_buf_size[idx], first_buf_entry_line_num, '-');
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000447 free(before_buf[idx]);
448 before_buf[idx] = NULL;
449 idx = (idx + 1) % lines_before;
450 first_buf_entry_line_num++;
451 }
452 }
453
454 /* make a note that we need to print 'after' lines */
455 print_n_lines_after = lines_after;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000456#endif
Denis Vlasenko385304d2007-02-25 02:38:20 +0000457 if (option_mask32 & OPT_o) {
Denis Vlasenko68102362007-11-04 00:46:03 +0000458 if (FGREP_FLAG) {
459 /* -Fo just prints the pattern
460 * (unless -v: -Fov doesnt print anything at all) */
461 if (found)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000462 print_line(gl->pattern, strlen(gl->pattern), linenum, ':');
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000463 } else while (1) {
Denys Vlasenko09449632009-07-29 01:20:09 +0200464 unsigned end = gl->matched_range.rm_eo;
465 char old = line[end];
466 line[end] = '\0';
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000467 print_line(line + gl->matched_range.rm_so,
Denys Vlasenko09449632009-07-29 01:20:09 +0200468 end - gl->matched_range.rm_so,
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000469 linenum, ':');
Denys Vlasenko6dc0ace2009-12-04 02:48:14 +0100470 if (old == '\0')
471 break;
Denys Vlasenko09449632009-07-29 01:20:09 +0200472 line[end] = old;
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000473#if !ENABLE_EXTRA_COMPAT
Denys Vlasenko09449632009-07-29 01:20:09 +0200474 if (regexec(&gl->compiled_regex, line + end,
475 1, &gl->matched_range, REG_NOTBOL) != 0)
476 break;
477 gl->matched_range.rm_so += end;
478 gl->matched_range.rm_eo += end;
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000479#else
480 if (re_search(&gl->compiled_regex, line, line_len,
Denys Vlasenko09449632009-07-29 01:20:09 +0200481 end, line_len - end,
Denis Vlasenkof60719c2008-09-30 22:37:29 +0000482 &gl->matched_range) < 0)
483 break;
484#endif
Denis Vlasenkoa9acbe62008-11-24 13:25:20 +0000485 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000486 } else {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000487 print_line(line, line_len, linenum, ':');
Mark Whitley2fd52982001-02-09 00:41:10 +0000488 }
Matt Kraai0810f722001-01-04 15:11:52 +0000489 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000490 }
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000491#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000492 else { /* no match */
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000493 /* if we need to print some context lines after the last match, do so */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000494 if (print_n_lines_after) {
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000495 print_line(line, strlen(line), linenum, '-');
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000496 print_n_lines_after--;
497 } else if (lines_before) {
498 /* Add the line to the circular 'before' buffer */
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000499 free(before_buf[curpos]);
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000500 before_buf[curpos] = line;
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000501 IF_EXTRA_COMPAT(before_buf_size[curpos] = line_len;)
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000502 curpos = (curpos + 1) % lines_before;
Denis Vlasenko1d426652008-03-17 09:09:09 +0000503 /* avoid free(line) - we took the line */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000504 line = NULL;
Mark Whitley2fd52982001-02-09 00:41:10 +0000505 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000506 }
Mark Whitley2fd52982001-02-09 00:41:10 +0000507
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000508#endif /* ENABLE_FEATURE_GREP_CONTEXT */
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000509#if !ENABLE_EXTRA_COMPAT
Mark Whitleyd3721892000-06-28 22:00:26 +0000510 free(line);
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000511#endif
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000512 /* Did we print all context after last requested match? */
513 if ((option_mask32 & OPT_m)
Denis Vlasenko83518d12009-03-20 22:17:13 +0000514 && !print_n_lines_after
515 && nmatches == max_matches
516 ) {
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000517 break;
Denis Vlasenko83518d12009-03-20 22:17:13 +0000518 }
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000519 } /* while (read line) */
Mark Whitley8f122432000-07-18 18:37:01 +0000520
Mark Whitley35e59be2001-05-14 19:40:32 +0000521 /* special-case file post-processing for options where we don't print line
Mark Whitley1d9d4112001-05-21 21:13:00 +0000522 * matches, just filenames and possibly match counts */
Mark Whitley35e59be2001-05-14 19:40:32 +0000523
Mark Whitley1d9d4112001-05-21 21:13:00 +0000524 /* grep -c: print [filename:]count, even if count is zero */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000525 if (PRINT_MATCH_COUNTS) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000526 if (print_filename)
Mark Whitley1d9d4112001-05-21 21:13:00 +0000527 printf("%s:", cur_file);
Denis Vlasenko92758142006-10-03 19:56:34 +0000528 printf("%d\n", nmatches);
Mark Whitley35e59be2001-05-14 19:40:32 +0000529 }
Mark Whitley1d9d4112001-05-21 21:13:00 +0000530
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000531 /* 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 */
Eric Andersendec7f812004-05-26 11:47:55 +0000536 puts(cur_file);
537 }
538
Eric Andersen8876fb22003-06-20 09:01:58 +0000539 return nmatches;
Mark Whitleyd3721892000-06-28 22:00:26 +0000540}
Eric Andersencc8ed391999-10-05 16:24:54 +0000541
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000542#if ENABLE_FEATURE_CLEAN_UP
543#define new_grep_list_data(p, m) add_grep_list_data(p, m)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000544static char *add_grep_list_data(char *pattern, int flg_used_mem)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000545#else
546#define new_grep_list_data(p, m) add_grep_list_data(p)
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000547static char *add_grep_list_data(char *pattern)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000548#endif
549{
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000550 grep_list_data_t *gl = xzalloc(sizeof(*gl));
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000551 gl->pattern = pattern;
552#if ENABLE_FEATURE_CLEAN_UP
553 gl->flg_mem_alocated_compiled = flg_used_mem;
554#else
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000555 /*gl->flg_mem_alocated_compiled = 0;*/
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000556#endif
557 return (char *)gl;
558}
559
Eric Andersen8876fb22003-06-20 09:01:58 +0000560static void load_regexes_from_file(llist_t *fopt)
Mark Whitleyfa43e542001-05-24 18:36:18 +0000561{
562 char *line;
Eric Andersen8876fb22003-06-20 09:01:58 +0000563 FILE *f;
564
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000565 while (fopt) {
Eric Andersen8876fb22003-06-20 09:01:58 +0000566 llist_t *cur = fopt;
567 char *ffile = cur->data;
568
569 fopt = cur->link;
570 free(cur);
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000571 f = xfopen_stdin(ffile);
Denis Vlasenko8ee649a2008-03-26 20:04:27 +0000572 while ((line = xmalloc_fgetline(f)) != NULL) {
Rob Landley8bb50782006-05-26 23:44:51 +0000573 llist_add_to(&pattern_head,
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000574 new_grep_list_data(line, ALLOCATED));
Eric Andersen31c27a92004-10-08 08:10:57 +0000575 }
Mark Whitleyfa43e542001-05-24 18:36:18 +0000576 }
577}
Mark Whitleyfa43e542001-05-24 18:36:18 +0000578
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +0000579static int FAST_FUNC file_action_grep(const char *filename,
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000580 struct stat *statbuf UNUSED_PARAM,
Denis Vlasenko1d426652008-03-17 09:09:09 +0000581 void* matched,
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +0000582 int depth UNUSED_PARAM)
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000583{
Denis Vlasenko5415c852008-07-21 23:05:26 +0000584 FILE *file = fopen_for_read(filename);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000585 if (file == NULL) {
586 if (!SUPPRESS_ERR_MSGS)
Denis Vlasenko8e8200a2008-01-24 01:30:36 +0000587 bb_simple_perror_msg(filename);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000588 open_errors = 1;
589 return 0;
590 }
591 cur_file = filename;
592 *(int*)matched += grep_file(file);
Denis Vlasenkobf392162006-10-15 18:38:01 +0000593 fclose(file);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000594 return 1;
595}
596
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000597static int grep_dir(const char *dir)
598{
599 int matched = 0;
600 recursive_action(dir,
Denis Vlasenkobbd695d2007-04-08 10:52:28 +0000601 /* recurse=yes */ ACTION_RECURSE |
602 /* followLinks=no */
603 /* depthFirst=yes */ ACTION_DEPTHFIRST,
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000604 /* fileAction= */ file_action_grep,
605 /* dirAction= */ NULL,
Denis Vlasenko8c35d652006-10-27 23:42:25 +0000606 /* userData= */ &matched,
607 /* depth= */ 0);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000608 return matched;
609}
610
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +0000611int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100612int grep_main(int argc UNUSED_PARAM, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +0000613{
Eric Andersen8876fb22003-06-20 09:01:58 +0000614 FILE *file;
615 int matched;
Eric Andersen31c27a92004-10-08 08:10:57 +0000616 llist_t *fopt = NULL;
Matt Kraai999623e2001-10-29 15:49:03 +0000617
Mark Whitleyd3721892000-06-28 22:00:26 +0000618 /* do normal option parsing */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000619#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko1d426652008-03-17 09:09:09 +0000620 int Copt;
Eric Andersen8876fb22003-06-20 09:01:58 +0000621
Denis Vlasenko1d426652008-03-17 09:09:09 +0000622 /* -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+";
Denis Vlasenkofe7cd642007-08-18 15:32:12 +0000625 getopt32(argv,
Denis Vlasenko385304d2007-02-25 02:38:20 +0000626 OPTSTR_GREP,
Denis Vlasenko1d426652008-03-17 09:09:09 +0000627 &pattern_head, &fopt, &max_matches,
628 &lines_after, &lines_before, &Copt);
Eric Andersen8876fb22003-06-20 09:01:58 +0000629
Denis Vlasenko385304d2007-02-25 02:38:20 +0000630 if (option_mask32 & OPT_C) {
Denis Vlasenko2295b492006-10-22 11:42:51 +0000631 /* -C unsets prev -A and -B, but following -A or -B
632 may override it */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000633 if (!(option_mask32 & OPT_A)) /* not overridden */
Denis Vlasenko1d426652008-03-17 09:09:09 +0000634 lines_after = Copt;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000635 if (!(option_mask32 & OPT_B)) /* not overridden */
Denis Vlasenko1d426652008-03-17 09:09:09 +0000636 lines_before = Copt;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000637 }
Denis Vlasenko2295b492006-10-22 11:42:51 +0000638 /* sanity checks */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000639 if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
640 option_mask32 &= ~OPT_n;
Eric Andersen8876fb22003-06-20 09:01:58 +0000641 lines_before = 0;
642 lines_after = 0;
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000643 } else if (lines_before > 0) {
644 before_buf = xzalloc(lines_before * sizeof(before_buf[0]));
Denis Vlasenko5e34ff22009-04-21 11:09:40 +0000645 IF_EXTRA_COMPAT(before_buf_size = xzalloc(lines_before * sizeof(before_buf_size[0]));)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000646 }
Eric Andersen8876fb22003-06-20 09:01:58 +0000647#else
648 /* with auto sanity checks */
Denis Vlasenko1d426652008-03-17 09:09:09 +0000649 /* -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+";
Denis Vlasenkofe7cd642007-08-18 15:32:12 +0000651 getopt32(argv, OPTSTR_GREP,
Denis Vlasenko1d426652008-03-17 09:09:09 +0000652 &pattern_head, &fopt, &max_matches);
Eric Andersen8876fb22003-06-20 09:01:58 +0000653#endif
Denis Vlasenko385304d2007-02-25 02:38:20 +0000654 invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000655
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000656 if (pattern_head != NULL) {
Bernhard Reutner-Fischerfebe3c42007-04-04 20:52:03 +0000657 /* convert char **argv to grep_list_data_t */
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000658 llist_t *cur;
659
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000660 for (cur = pattern_head; cur; cur = cur->link)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000661 cur->data = new_grep_list_data(cur->data, 0);
662 }
Denis Vlasenko385304d2007-02-25 02:38:20 +0000663 if (option_mask32 & OPT_f)
Eric Andersen8876fb22003-06-20 09:01:58 +0000664 load_regexes_from_file(fopt);
665
Denis Vlasenko8f8f2682006-10-03 21:00:43 +0000666 if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
Denis Vlasenko385304d2007-02-25 02:38:20 +0000667 option_mask32 |= OPT_F;
Mike Frysinger15ca5862005-07-31 22:41:05 +0000668
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000669#if !ENABLE_EXTRA_COMPAT
Denis Vlasenko385304d2007-02-25 02:38:20 +0000670 if (!(option_mask32 & (OPT_o | OPT_w)))
Denis Vlasenko51937532006-09-29 20:58:53 +0000671 reflags = REG_NOSUB;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000672#endif
Denis Vlasenko51937532006-09-29 20:58:53 +0000673
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000674 if (ENABLE_FEATURE_GREP_EGREP_ALIAS
675 && (applet_name[0] == 'e' || (option_mask32 & OPT_E))
676 ) {
Denis Vlasenko51937532006-09-29 20:58:53 +0000677 reflags |= REG_EXTENDED;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000678 }
Denis Vlasenko9ac706b2008-09-19 21:32:51 +0000679#if ENABLE_EXTRA_COMPAT
680 else {
681 reflags = RE_SYNTAX_GREP;
682 }
683#endif
Eric Andersen8876fb22003-06-20 09:01:58 +0000684
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000685 if (option_mask32 & OPT_i) {
686#if !ENABLE_EXTRA_COMPAT
Eric Andersen8876fb22003-06-20 09:01:58 +0000687 reflags |= REG_ICASE;
Denis Vlasenkoc110b7d2008-09-19 21:29:21 +0000688#else
689 int i;
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'));
695#endif
696 }
Eric Andersen8876fb22003-06-20 09:01:58 +0000697
698 argv += optind;
Eric Andersen053b1462000-06-13 06:24:53 +0000699
Denis Vlasenko1d426652008-03-17 09:09:09 +0000700 /* 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 */
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000702 if (pattern_head == NULL) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000703 char *pattern;
Eric Andersen8876fb22003-06-20 09:01:58 +0000704 if (*argv == NULL)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000705 bb_show_usage();
Denis Vlasenko385304d2007-02-25 02:38:20 +0000706 pattern = new_grep_list_data(*argv++, 0);
707 llist_add_to(&pattern_head, pattern);
Mark Whitleyfa43e542001-05-24 18:36:18 +0000708 }
Mark Whitleyd3721892000-06-28 22:00:26 +0000709
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000710 /* argv[0..(argc-1)] should be names of file to grep through. If
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000711 * there is more than one file to grep, we will print the filenames. */
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100712 if (argv[0] && argv[1])
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000713 print_filename = 1;
Denis Vlasenko2295b492006-10-22 11:42:51 +0000714 /* -H / -h of course override */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000715 if (option_mask32 & OPT_H)
Denis Vlasenko2295b492006-10-22 11:42:51 +0000716 print_filename = 1;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000717 if (option_mask32 & OPT_h)
Denis Vlasenko2295b492006-10-22 11:42:51 +0000718 print_filename = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000719
Mark Whitley2e1148b2000-06-28 22:59:30 +0000720 /* If no files were specified, or '-' was specified, take input from
721 * stdin. Otherwise, we grep through all the files specified. */
Eric Andersen8876fb22003-06-20 09:01:58 +0000722 matched = 0;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000723 do {
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100724 cur_file = *argv;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000725 file = stdin;
Denis Vlasenko1d426652008-03-17 09:09:09 +0000726 if (!cur_file || LONE_DASH(cur_file)) {
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000727 cur_file = "(standard input)";
Eric Andersen8876fb22003-06-20 09:01:58 +0000728 } else {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000729 if (option_mask32 & OPT_r) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000730 struct stat st;
731 if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000732 if (!(option_mask32 & OPT_h))
Denis Vlasenko3544ae62006-10-14 14:51:59 +0000733 print_filename = 1;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000734 matched += grep_dir(cur_file);
735 goto grep_done;
736 }
Mark Whitley2ef880b2000-07-18 21:02:06 +0000737 }
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000738 /* else: fopen(dir) will succeed, but reading won't */
Denis Vlasenko5415c852008-07-21 23:05:26 +0000739 file = fopen_for_read(cur_file);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000740 if (file == NULL) {
741 if (!SUPPRESS_ERR_MSGS)
Denis Vlasenko0c97c9d2007-10-01 11:58:38 +0000742 bb_simple_perror_msg(cur_file);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000743 open_errors = 1;
744 continue;
745 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000746 }
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000747 matched += grep_file(file);
Denis Vlasenkoddec5af2006-10-26 23:25:17 +0000748 fclose_if_not_stdin(file);
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000749 grep_done: ;
Denys Vlasenko2ec91ae2010-01-04 14:15:38 +0100750 } while (*argv && *++argv);
Eric Andersen8876fb22003-06-20 09:01:58 +0000751
Eric Andersen8876fb22003-06-20 09:01:58 +0000752 /* destroy all the elments in the pattern list */
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000753 if (ENABLE_FEATURE_CLEAN_UP) {
754 while (pattern_head) {
755 llist_t *pattern_head_ptr = pattern_head;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000756 grep_list_data_t *gl = (grep_list_data_t *)pattern_head_ptr->data;
Eric Andersen8876fb22003-06-20 09:01:58 +0000757
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000758 pattern_head = pattern_head->link;
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000759 if (gl->flg_mem_alocated_compiled & ALLOCATED)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000760 free(gl->pattern);
Denis Vlasenkoa05c0712008-06-07 05:19:31 +0000761 if (gl->flg_mem_alocated_compiled & COMPILED)
Denis Vlasenko3fd15e12008-08-09 16:15:14 +0000762 regfree(&gl->compiled_regex);
Mike Frysinger3a62a732007-04-12 18:29:27 +0000763 free(gl);
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000764 free(pattern_head_ptr);
765 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000766 }
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000767 /* 0 = success, 1 = failed, 2 = error */
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000768 if (open_errors)
"Vladimir N. Oleynik"bf449742005-09-23 13:50:24 +0000769 return 2;
Denis Vlasenko04ea11b2007-09-10 12:18:32 +0000770 return !matched; /* invert return value: 0 = success, 1 = failed */
Eric Andersencc8ed391999-10-05 16:24:54 +0000771}