blob: e543ee07fcb532c13586d830e8e7267904e2ba22 [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 */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +000010/* BB_AUDIT SUSv3 defects - unsupported option -x. */
11/* 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 \
Denis Vlasenko4652daa2007-07-15 12:39:08 +000027 "lnqvscFiHhe:f:Lorm:" \
Denis Vlasenko385304d2007-02-25 02:38:20 +000028 USE_FEATURE_GREP_CONTEXT("A:B:C:") \
29 USE_FEATURE_GREP_EGREP_ALIAS("E") \
30 USE_DESKTOP("w") \
Denis Vlasenkof8ea0f32007-02-25 02:38:54 +000031 "aI"
32/* ignored: -a "assume all files to be text" */
33/* ignored: -I "assume binary files have no matches" */
Denis Vlasenko385304d2007-02-25 02:38:20 +000034
35enum {
Denis Vlasenko4652daa2007-07-15 12:39:08 +000036 OPTBIT_l, /* list matched file names only */
37 OPTBIT_n, /* print line# */
38 OPTBIT_q, /* quiet - exit(0) of first match */
39 OPTBIT_v, /* invert the match, to select non-matching lines */
40 OPTBIT_s, /* suppress errors about file open errors */
41 OPTBIT_c, /* count matches per file (suppresses normal output) */
42 OPTBIT_F, /* literal match */
43 OPTBIT_i, /* case-insensitive */
44 OPTBIT_H, /* force filename display */
45 OPTBIT_h, /* inhibit filename display */
46 OPTBIT_e, /* -e PATTERN */
47 OPTBIT_f, /* -f FILE_WITH_PATTERNS */
48 OPTBIT_L, /* list unmatched file names only */
49 OPTBIT_o, /* show only matching parts of lines */
50 OPTBIT_r, /* recurse dirs */
51 OPTBIT_m, /* -m MAX_MATCHES */
52 USE_FEATURE_GREP_CONTEXT( OPTBIT_A ,) /* -A NUM: after-match context */
53 USE_FEATURE_GREP_CONTEXT( OPTBIT_B ,) /* -B NUM: before-match context */
54 USE_FEATURE_GREP_CONTEXT( OPTBIT_C ,) /* -C NUM: -A and -B combined */
55 USE_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
56 USE_DESKTOP( OPTBIT_w ,) /* whole word match */
Denis Vlasenko385304d2007-02-25 02:38:20 +000057 OPT_l = 1 << OPTBIT_l,
58 OPT_n = 1 << OPTBIT_n,
59 OPT_q = 1 << OPTBIT_q,
60 OPT_v = 1 << OPTBIT_v,
61 OPT_s = 1 << OPTBIT_s,
62 OPT_c = 1 << OPTBIT_c,
63 OPT_F = 1 << OPTBIT_F,
64 OPT_i = 1 << OPTBIT_i,
65 OPT_H = 1 << OPTBIT_H,
66 OPT_h = 1 << OPTBIT_h,
67 OPT_e = 1 << OPTBIT_e,
68 OPT_f = 1 << OPTBIT_f,
69 OPT_L = 1 << OPTBIT_L,
70 OPT_o = 1 << OPTBIT_o,
71 OPT_r = 1 << OPTBIT_r,
Denis Vlasenko4652daa2007-07-15 12:39:08 +000072 OPT_m = 1 << OPTBIT_m,
Denis Vlasenko9acfed22007-06-08 15:41:27 +000073 OPT_A = USE_FEATURE_GREP_CONTEXT( (1 << OPTBIT_A)) + 0,
74 OPT_B = USE_FEATURE_GREP_CONTEXT( (1 << OPTBIT_B)) + 0,
75 OPT_C = USE_FEATURE_GREP_CONTEXT( (1 << OPTBIT_C)) + 0,
76 OPT_E = USE_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
77 OPT_w = USE_DESKTOP( (1 << OPTBIT_w)) + 0,
Denis Vlasenko385304d2007-02-25 02:38:20 +000078};
79
Denis Vlasenko9acfed22007-06-08 15:41:27 +000080#define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l)
81#define PRINT_LINE_NUM (option_mask32 & OPT_n)
82#define BE_QUIET (option_mask32 & OPT_q)
83#define SUPPRESS_ERR_MSGS (option_mask32 & OPT_s)
84#define PRINT_MATCH_COUNTS (option_mask32 & OPT_c)
85#define FGREP_FLAG (option_mask32 & OPT_F)
Denis Vlasenko385304d2007-02-25 02:38:20 +000086#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
Eric Andersen8876fb22003-06-20 09:01:58 +000087
Denis Vlasenko3a6755f2006-10-14 14:24:30 +000088typedef unsigned char byte_t;
89
Denis Vlasenko4652daa2007-07-15 12:39:08 +000090static int max_matches;
Eric Andersen8876fb22003-06-20 09:01:58 +000091static int reflags;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +000092static byte_t invert_search;
93static byte_t print_filename;
94static byte_t open_errors;
Mark Whitleyd3721892000-06-28 22:00:26 +000095
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +000096#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko8d5aa872007-07-15 12:38:18 +000097static byte_t did_print_line;
Eric Andersen8876fb22003-06-20 09:01:58 +000098static int lines_before;
99static int lines_after;
100static char **before_buf;
101static int last_line_printed;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000102#endif /* ENABLE_FEATURE_GREP_CONTEXT */
Mark Whitley2fd52982001-02-09 00:41:10 +0000103/* globals used internally */
Eric Andersen8876fb22003-06-20 09:01:58 +0000104static llist_t *pattern_head; /* growable list of patterns to match */
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000105static const char *cur_file; /* the current file we are reading */
Mark Whitleyd3721892000-06-28 22:00:26 +0000106
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000107typedef struct grep_list_data_t {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000108 char *pattern;
109 regex_t preg;
110#define PATTERN_MEM_A 1
111#define COMPILED 2
112 int flg_mem_alocated_compiled;
113} grep_list_data_t;
Mark Whitleyfa43e542001-05-24 18:36:18 +0000114
Mark Whitley2fd52982001-02-09 00:41:10 +0000115static void print_line(const char *line, int linenum, char decoration)
116{
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000117#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000118 /* Happens when we go to next file, immediately hit match
119 * and try to print prev context... from prev file! Don't do it */
120 if (linenum < 1)
121 return;
Eric Andersenaff114c2004-04-14 17:51:38 +0000122 /* possibly print the little '--' separator */
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000123 if ((lines_before || lines_after) && did_print_line &&
124 last_line_printed != linenum - 1) {
Mark Whitley2fd52982001-02-09 00:41:10 +0000125 puts("--");
126 }
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000127 /* guard against printing "--" before first line of first file */
128 did_print_line = 1;
Mark Whitley2fd52982001-02-09 00:41:10 +0000129 last_line_printed = linenum;
130#endif
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000131 if (print_filename)
Mark Whitley2fd52982001-02-09 00:41:10 +0000132 printf("%s%c", cur_file, decoration);
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000133 if (PRINT_LINE_NUM)
Mark Whitley2fd52982001-02-09 00:41:10 +0000134 printf("%i%c", linenum, decoration);
Denis Vlasenko51937532006-09-29 20:58:53 +0000135 /* Emulate weird GNU grep behavior with -ov */
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000136 if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o))
Denis Vlasenko51937532006-09-29 20:58:53 +0000137 puts(line);
Mark Whitley2fd52982001-02-09 00:41:10 +0000138}
Mark Whitleyd3721892000-06-28 22:00:26 +0000139
Eric Andersen8876fb22003-06-20 09:01:58 +0000140static int grep_file(FILE *file)
Mark Whitleyd3721892000-06-28 22:00:26 +0000141{
Eric Andersen8876fb22003-06-20 09:01:58 +0000142 char *line;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000143 byte_t ret;
Mark Whitleyd3721892000-06-28 22:00:26 +0000144 int linenum = 0;
Matt Kraaideb95f62000-08-06 15:25:53 +0000145 int nmatches = 0;
Denis Vlasenko51937532006-09-29 20:58:53 +0000146 regmatch_t regmatch;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000147#if ENABLE_FEATURE_GREP_CONTEXT
Mark Whitley2fd52982001-02-09 00:41:10 +0000148 int print_n_lines_after = 0;
149 int curpos = 0; /* track where we are in the circular 'before' buffer */
150 int idx = 0; /* used for iteration through the circular buffer */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000151#else
152 enum { print_n_lines_after = 0 };
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000153#endif /* ENABLE_FEATURE_GREP_CONTEXT */
Mark Whitleyd3721892000-06-28 22:00:26 +0000154
Denis Vlasenko2d5ca602006-10-12 22:43:20 +0000155 while ((line = xmalloc_getline(file)) != NULL) {
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000156 llist_t *pattern_ptr = pattern_head;
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000157 grep_list_data_t * gl;
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000158
Mark Whitleyd3721892000-06-28 22:00:26 +0000159 linenum++;
Eric Andersen8876fb22003-06-20 09:01:58 +0000160 ret = 0;
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000161 while (pattern_ptr) {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000162 gl = (grep_list_data_t *)pattern_ptr->data;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000163 if (FGREP_FLAG) {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000164 ret = strstr(line, gl->pattern) != NULL;
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000165 } else {
166 /*
167 * test for a postitive-assertion match (regexec returns success (0)
168 * and the user did not specify invert search), or a negative-assertion
169 * match (regexec returns failure (REG_NOMATCH) and the user specified
170 * invert search)
171 */
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000172 if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000173 gl->flg_mem_alocated_compiled |= COMPILED;
174 xregcomp(&(gl->preg), gl->pattern, reflags);
175 }
Denis Vlasenko51937532006-09-29 20:58:53 +0000176 regmatch.rm_so = 0;
177 regmatch.rm_eo = 0;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000178 if (regexec(&(gl->preg), line, 1, &regmatch, 0) == 0) {
179 if (!(option_mask32 & OPT_w))
180 ret = 1;
181 else {
182 char c = ' ';
183 if (regmatch.rm_so)
184 c = line[regmatch.rm_so - 1];
185 if (!isalnum(c) && c != '_') {
186 c = line[regmatch.rm_eo];
187 if (!c || (!isalnum(c) && c != '_'))
188 ret = 1;
189 }
190 }
191 }
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000192 }
Eric Andersen8876fb22003-06-20 09:01:58 +0000193 pattern_ptr = pattern_ptr->link;
194 } /* while (pattern_ptr) */
Mark Whitleyd3721892000-06-28 22:00:26 +0000195
Denis Vlasenko51937532006-09-29 20:58:53 +0000196 if (ret ^ invert_search) {
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000197 /* keep track of matches */
198 nmatches++;
Mark Whitley1d9d4112001-05-21 21:13:00 +0000199
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000200 /* quiet/print (non)matching file names only? */
201 if (option_mask32 & (OPT_q|OPT_l|OPT_L)) {
202 free(line); /* we don't need line anymore */
203 if (BE_QUIET) {
204 /* manpage says about -q:
205 * "exit immediately with zero status
206 * if any match is found,
207 * even if errors were detected" */
208 exit(0);
209 }
210 /* if we're just printing filenames, we stop after the first match */
211 if (PRINT_FILES_WITH_MATCHES) {
212 puts(cur_file);
213 /* fall thru to "return 1" */
214 }
215 /* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
216 return 1; /* one match */
217 }
Mark Whitley1d9d4112001-05-21 21:13:00 +0000218
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000219#if ENABLE_FEATURE_GREP_CONTEXT
220 /* Were we printing context and saw next (unwanted) match? */
221 if ((option_mask32 & OPT_m) && nmatches > max_matches)
222 break;
223#endif
224
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000225 /* print the matched line */
226 if (PRINT_MATCH_COUNTS == 0) {
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000227#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000228 int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
Mark Whitley2fd52982001-02-09 00:41:10 +0000229
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000230 /* if we were told to print 'before' lines and there is at least
231 * one line in the circular buffer, print them */
232 if (lines_before && before_buf[prevpos] != NULL) {
233 int first_buf_entry_line_num = linenum - lines_before;
Mark Whitley2fd52982001-02-09 00:41:10 +0000234
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000235 /* advance to the first entry in the circular buffer, and
236 * figure out the line number is of the first line in the
237 * buffer */
238 idx = curpos;
239 while (before_buf[idx] == NULL) {
240 idx = (idx + 1) % lines_before;
241 first_buf_entry_line_num++;
Mark Whitley2fd52982001-02-09 00:41:10 +0000242 }
243
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000244 /* now print each line in the buffer, clearing them as we go */
245 while (before_buf[idx] != NULL) {
246 print_line(before_buf[idx], first_buf_entry_line_num, '-');
247 free(before_buf[idx]);
248 before_buf[idx] = NULL;
249 idx = (idx + 1) % lines_before;
250 first_buf_entry_line_num++;
251 }
252 }
253
254 /* make a note that we need to print 'after' lines */
255 print_n_lines_after = lines_after;
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000256#endif
Denis Vlasenko385304d2007-02-25 02:38:20 +0000257 if (option_mask32 & OPT_o) {
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000258 line[regmatch.rm_eo] = '\0';
259 print_line(line + regmatch.rm_so, linenum, ':');
260 } else {
261 print_line(line, linenum, ':');
Mark Whitley2fd52982001-02-09 00:41:10 +0000262 }
Matt Kraai0810f722001-01-04 15:11:52 +0000263 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000264 }
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000265#if ENABLE_FEATURE_GREP_CONTEXT
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000266 else { /* no match */
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000267 /* if we need to print some context lines after the last match, do so */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000268 if (print_n_lines_after) {
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000269 print_line(line, linenum, '-');
270 print_n_lines_after--;
271 } else if (lines_before) {
272 /* Add the line to the circular 'before' buffer */
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000273 free(before_buf[curpos]);
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000274 before_buf[curpos] = line;
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000275 curpos = (curpos + 1) % lines_before;
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000276 /* avoid free(line) - we took line */
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000277 line = NULL;
Mark Whitley2fd52982001-02-09 00:41:10 +0000278 }
Denis Vlasenko4222ae42007-02-25 02:37:49 +0000279 }
Mark Whitley2fd52982001-02-09 00:41:10 +0000280
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000281#endif /* ENABLE_FEATURE_GREP_CONTEXT */
Mark Whitleyd3721892000-06-28 22:00:26 +0000282 free(line);
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000283
284 /* Did we print all context after last requested match? */
285 if ((option_mask32 & OPT_m)
286 && !print_n_lines_after && nmatches == max_matches)
287 break;
Mark Whitleyd3721892000-06-28 22:00:26 +0000288 }
Mark Whitley8f122432000-07-18 18:37:01 +0000289
Mark Whitley35e59be2001-05-14 19:40:32 +0000290 /* special-case file post-processing for options where we don't print line
Mark Whitley1d9d4112001-05-21 21:13:00 +0000291 * matches, just filenames and possibly match counts */
Mark Whitley35e59be2001-05-14 19:40:32 +0000292
Mark Whitley1d9d4112001-05-21 21:13:00 +0000293 /* grep -c: print [filename:]count, even if count is zero */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000294 if (PRINT_MATCH_COUNTS) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000295 if (print_filename)
Mark Whitley1d9d4112001-05-21 21:13:00 +0000296 printf("%s:", cur_file);
Denis Vlasenko92758142006-10-03 19:56:34 +0000297 printf("%d\n", nmatches);
Mark Whitley35e59be2001-05-14 19:40:32 +0000298 }
Mark Whitley1d9d4112001-05-21 21:13:00 +0000299
Denis Vlasenko8d5aa872007-07-15 12:38:18 +0000300 /* grep -L: print just the filename */
301 if (PRINT_FILES_WITHOUT_MATCHES) {
302 /* nmatches is zero, no need to check it:
303 * we return 1 early if we detected a match
304 * and PRINT_FILES_WITHOUT_MATCHES is set */
Eric Andersendec7f812004-05-26 11:47:55 +0000305 puts(cur_file);
306 }
307
Eric Andersen8876fb22003-06-20 09:01:58 +0000308 return nmatches;
Mark Whitleyd3721892000-06-28 22:00:26 +0000309}
Eric Andersencc8ed391999-10-05 16:24:54 +0000310
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000311#if ENABLE_FEATURE_CLEAN_UP
312#define new_grep_list_data(p, m) add_grep_list_data(p, m)
313static char * add_grep_list_data(char *pattern, int flg_used_mem)
314#else
315#define new_grep_list_data(p, m) add_grep_list_data(p)
316static char * add_grep_list_data(char *pattern)
317#endif
318{
319 grep_list_data_t *gl = xmalloc(sizeof(grep_list_data_t));
320 gl->pattern = pattern;
321#if ENABLE_FEATURE_CLEAN_UP
322 gl->flg_mem_alocated_compiled = flg_used_mem;
323#else
324 gl->flg_mem_alocated_compiled = 0;
325#endif
326 return (char *)gl;
327}
328
Eric Andersen8876fb22003-06-20 09:01:58 +0000329static void load_regexes_from_file(llist_t *fopt)
Mark Whitleyfa43e542001-05-24 18:36:18 +0000330{
331 char *line;
Eric Andersen8876fb22003-06-20 09:01:58 +0000332 FILE *f;
333
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000334 while (fopt) {
Eric Andersen8876fb22003-06-20 09:01:58 +0000335 llist_t *cur = fopt;
336 char *ffile = cur->data;
337
338 fopt = cur->link;
339 free(cur);
Rob Landleyd921b2e2006-08-03 15:41:12 +0000340 f = xfopen(ffile, "r");
Denis Vlasenko2d5ca602006-10-12 22:43:20 +0000341 while ((line = xmalloc_getline(f)) != NULL) {
Rob Landley8bb50782006-05-26 23:44:51 +0000342 llist_add_to(&pattern_head,
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000343 new_grep_list_data(line, PATTERN_MEM_A));
Eric Andersen31c27a92004-10-08 08:10:57 +0000344 }
Mark Whitleyfa43e542001-05-24 18:36:18 +0000345 }
346}
Mark Whitleyfa43e542001-05-24 18:36:18 +0000347
Denis Vlasenko8c35d652006-10-27 23:42:25 +0000348static int file_action_grep(const char *filename, struct stat *statbuf, void* matched, int depth)
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000349{
350 FILE *file = fopen(filename, "r");
351 if (file == NULL) {
352 if (!SUPPRESS_ERR_MSGS)
353 bb_perror_msg("%s", cur_file);
354 open_errors = 1;
355 return 0;
356 }
357 cur_file = filename;
358 *(int*)matched += grep_file(file);
Denis Vlasenkobf392162006-10-15 18:38:01 +0000359 fclose(file);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000360 return 1;
361}
362
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000363static int grep_dir(const char *dir)
364{
365 int matched = 0;
366 recursive_action(dir,
Denis Vlasenkobbd695d2007-04-08 10:52:28 +0000367 /* recurse=yes */ ACTION_RECURSE |
368 /* followLinks=no */
369 /* depthFirst=yes */ ACTION_DEPTHFIRST,
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000370 /* fileAction= */ file_action_grep,
371 /* dirAction= */ NULL,
Denis Vlasenko8c35d652006-10-27 23:42:25 +0000372 /* userData= */ &matched,
373 /* depth= */ 0);
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000374 return matched;
375}
376
Denis Vlasenko06af2162007-02-03 17:28:39 +0000377int grep_main(int argc, char **argv);
Rob Landleydfba7412006-03-06 20:47:33 +0000378int grep_main(int argc, char **argv)
Eric Andersencc8ed391999-10-05 16:24:54 +0000379{
Eric Andersen8876fb22003-06-20 09:01:58 +0000380 FILE *file;
381 int matched;
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000382 char *mopt;
Eric Andersen31c27a92004-10-08 08:10:57 +0000383 llist_t *fopt = NULL;
Matt Kraai999623e2001-10-29 15:49:03 +0000384
Mark Whitleyd3721892000-06-28 22:00:26 +0000385 /* do normal option parsing */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000386#if ENABLE_FEATURE_GREP_CONTEXT
Eric Andersen8876fb22003-06-20 09:01:58 +0000387 char *slines_after;
388 char *slines_before;
389 char *Copt;
390
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000391 opt_complementary = "H-h:e::f::C-AB";
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000392 getopt32(argc, argv,
Denis Vlasenko385304d2007-02-25 02:38:20 +0000393 OPTSTR_GREP,
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000394 &pattern_head, &fopt, &mopt,
Eric Andersen8876fb22003-06-20 09:01:58 +0000395 &slines_after, &slines_before, &Copt);
396
Denis Vlasenko385304d2007-02-25 02:38:20 +0000397 if (option_mask32 & OPT_C) {
Denis Vlasenko2295b492006-10-22 11:42:51 +0000398 /* -C unsets prev -A and -B, but following -A or -B
399 may override it */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000400 if (!(option_mask32 & OPT_A)) /* not overridden */
Eric Andersen8876fb22003-06-20 09:01:58 +0000401 slines_after = Copt;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000402 if (!(option_mask32 & OPT_B)) /* not overridden */
Eric Andersen8876fb22003-06-20 09:01:58 +0000403 slines_before = Copt;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000404 option_mask32 |= OPT_A|OPT_B; /* for parser */
Eric Andersen053b1462000-06-13 06:24:53 +0000405 }
Denis Vlasenko385304d2007-02-25 02:38:20 +0000406 if (option_mask32 & OPT_A) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000407 lines_after = xatoi_u(slines_after);
Eric Andersen8876fb22003-06-20 09:01:58 +0000408 }
Denis Vlasenko385304d2007-02-25 02:38:20 +0000409 if (option_mask32 & OPT_B) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000410 lines_before = xatoi_u(slines_before);
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000411 }
Denis Vlasenko2295b492006-10-22 11:42:51 +0000412 /* sanity checks */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000413 if (option_mask32 & (OPT_c|OPT_q|OPT_l|OPT_L)) {
414 option_mask32 &= ~OPT_n;
Eric Andersen8876fb22003-06-20 09:01:58 +0000415 lines_before = 0;
416 lines_after = 0;
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000417 } else if (lines_before > 0)
Denis Vlasenko4cccc032006-12-22 18:37:07 +0000418 before_buf = xzalloc(lines_before * sizeof(char *));
Eric Andersen8876fb22003-06-20 09:01:58 +0000419#else
420 /* with auto sanity checks */
Denis Vlasenko67b23e62006-10-03 21:00:06 +0000421 opt_complementary = "H-h:e::f::c-n:q-n:l-n";
Denis Vlasenko385304d2007-02-25 02:38:20 +0000422 getopt32(argc, argv, OPTSTR_GREP,
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000423 &pattern_head, &fopt, &mopt);
Eric Andersen8876fb22003-06-20 09:01:58 +0000424#endif
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000425 if (option_mask32 & OPT_m) {
426 max_matches = xatoi_u(mopt);
427 }
Denis Vlasenko385304d2007-02-25 02:38:20 +0000428 invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000429
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000430 if (pattern_head != NULL) {
Bernhard Reutner-Fischerfebe3c42007-04-04 20:52:03 +0000431 /* convert char **argv to grep_list_data_t */
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000432 llist_t *cur;
433
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000434 for (cur = pattern_head; cur; cur = cur->link)
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000435 cur->data = new_grep_list_data(cur->data, 0);
436 }
Denis Vlasenko385304d2007-02-25 02:38:20 +0000437 if (option_mask32 & OPT_f)
Eric Andersen8876fb22003-06-20 09:01:58 +0000438 load_regexes_from_file(fopt);
439
Denis Vlasenko8f8f2682006-10-03 21:00:43 +0000440 if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
Denis Vlasenko385304d2007-02-25 02:38:20 +0000441 option_mask32 |= OPT_F;
Mike Frysinger15ca5862005-07-31 22:41:05 +0000442
Denis Vlasenko385304d2007-02-25 02:38:20 +0000443 if (!(option_mask32 & (OPT_o | OPT_w)))
Denis Vlasenko51937532006-09-29 20:58:53 +0000444 reflags = REG_NOSUB;
445
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000446 if (ENABLE_FEATURE_GREP_EGREP_ALIAS &&
Denis Vlasenko385304d2007-02-25 02:38:20 +0000447 (applet_name[0] == 'e' || (option_mask32 & OPT_E)))
Denis Vlasenko51937532006-09-29 20:58:53 +0000448 reflags |= REG_EXTENDED;
Eric Andersen8876fb22003-06-20 09:01:58 +0000449
Denis Vlasenko385304d2007-02-25 02:38:20 +0000450 if (option_mask32 & OPT_i)
Eric Andersen8876fb22003-06-20 09:01:58 +0000451 reflags |= REG_ICASE;
452
453 argv += optind;
454 argc -= optind;
Eric Andersen053b1462000-06-13 06:24:53 +0000455
Mark Whitleyfa43e542001-05-24 18:36:18 +0000456 /* if we didn't get a pattern from a -e and no command file was specified,
457 * argv[optind] should be the pattern. no pattern, no worky */
Glenn L McGrath26df70a2003-04-27 01:50:57 +0000458 if (pattern_head == NULL) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000459 char *pattern;
Eric Andersen8876fb22003-06-20 09:01:58 +0000460 if (*argv == NULL)
Manuel Novoa III cad53642003-03-19 09:13:01 +0000461 bb_show_usage();
Denis Vlasenko385304d2007-02-25 02:38:20 +0000462 pattern = new_grep_list_data(*argv++, 0);
463 llist_add_to(&pattern_head, pattern);
464 argc--;
Mark Whitleyfa43e542001-05-24 18:36:18 +0000465 }
Mark Whitleyd3721892000-06-28 22:00:26 +0000466
Mark Whitleyfa43e542001-05-24 18:36:18 +0000467 /* argv[(optind)..(argc-1)] should be names of file to grep through. If
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000468 * there is more than one file to grep, we will print the filenames. */
Denis Vlasenko2295b492006-10-22 11:42:51 +0000469 if (argc > 1)
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000470 print_filename = 1;
Denis Vlasenko2295b492006-10-22 11:42:51 +0000471 /* -H / -h of course override */
Denis Vlasenko385304d2007-02-25 02:38:20 +0000472 if (option_mask32 & OPT_H)
Denis Vlasenko2295b492006-10-22 11:42:51 +0000473 print_filename = 1;
Denis Vlasenko385304d2007-02-25 02:38:20 +0000474 if (option_mask32 & OPT_h)
Denis Vlasenko2295b492006-10-22 11:42:51 +0000475 print_filename = 0;
Erik Andersene49d5ec2000-02-08 19:58:47 +0000476
Mark Whitley2e1148b2000-06-28 22:59:30 +0000477 /* If no files were specified, or '-' was specified, take input from
478 * stdin. Otherwise, we grep through all the files specified. */
Denis Vlasenko2295b492006-10-22 11:42:51 +0000479 if (argc == 0)
Eric Andersen8876fb22003-06-20 09:01:58 +0000480 argc++;
Eric Andersen8876fb22003-06-20 09:01:58 +0000481 matched = 0;
482 while (argc--) {
483 cur_file = *argv++;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000484 file = stdin;
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000485 if (!cur_file || (*cur_file == '-' && !cur_file[1])) {
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000486 cur_file = "(standard input)";
Eric Andersen8876fb22003-06-20 09:01:58 +0000487 } else {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000488 if (option_mask32 & OPT_r) {
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000489 struct stat st;
490 if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
Denis Vlasenko385304d2007-02-25 02:38:20 +0000491 if (!(option_mask32 & OPT_h))
Denis Vlasenko3544ae62006-10-14 14:51:59 +0000492 print_filename = 1;
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000493 matched += grep_dir(cur_file);
494 goto grep_done;
495 }
Mark Whitley2ef880b2000-07-18 21:02:06 +0000496 }
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000497 /* else: fopen(dir) will succeed, but reading won't */
498 file = fopen(cur_file, "r");
499 if (file == NULL) {
500 if (!SUPPRESS_ERR_MSGS)
501 bb_perror_msg("%s", cur_file);
502 open_errors = 1;
503 continue;
504 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000505 }
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000506 matched += grep_file(file);
Denis Vlasenkoddec5af2006-10-26 23:25:17 +0000507 fclose_if_not_stdin(file);
Denis Vlasenko4652daa2007-07-15 12:39:08 +0000508 grep_done: ;
"Vladimir N. Oleynik"cf40d812005-09-23 13:23:15 +0000509 }
Eric Andersen8876fb22003-06-20 09:01:58 +0000510
Eric Andersen8876fb22003-06-20 09:01:58 +0000511 /* destroy all the elments in the pattern list */
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000512 if (ENABLE_FEATURE_CLEAN_UP) {
513 while (pattern_head) {
514 llist_t *pattern_head_ptr = pattern_head;
515 grep_list_data_t *gl =
516 (grep_list_data_t *)pattern_head_ptr->data;
Eric Andersen8876fb22003-06-20 09:01:58 +0000517
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000518 pattern_head = pattern_head->link;
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000519 if ((gl->flg_mem_alocated_compiled & PATTERN_MEM_A))
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000520 free(gl->pattern);
Denis Vlasenko6c30db82006-09-29 21:04:12 +0000521 if ((gl->flg_mem_alocated_compiled & COMPILED))
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000522 regfree(&(gl->preg));
Mike Frysinger3a62a732007-04-12 18:29:27 +0000523 free(gl);
"Vladimir N. Oleynik"716bbe92006-02-28 10:10:19 +0000524 free(pattern_head_ptr);
525 }
Erik Andersene49d5ec2000-02-08 19:58:47 +0000526 }
Bernhard Reutner-Fischeraaf0e232005-09-23 15:38:49 +0000527 /* 0 = success, 1 = failed, 2 = error */
Denis Vlasenko3a6755f2006-10-14 14:24:30 +0000528 if (open_errors)
"Vladimir N. Oleynik"bf449742005-09-23 13:50:24 +0000529 return 2;
Mark Whitleyb5c29852001-02-01 21:02:41 +0000530 return !matched; /* invert return value 0 = success, 1 = failed */
Eric Andersencc8ed391999-10-05 16:24:54 +0000531}