busybox/findutils/grep.c

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/* vi: set sw=4 ts=4: */
1999-10-05 21:54:54 +05:30
/*
* Mini grep implementation for busybox using libc regex.
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*
* Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
* Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
/* BB_AUDIT SUSv3 defects - unsupported option -x "match whole line only". */
/* BB_AUDIT GNU defects - always acts as -a. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
/*
* 2004,2006 (C) Vladimir Oleynik <dzo@simtreas.ru> -
* correction "-e pattern1 -e pattern2" logic and more optimizations.
* precompiled regex
*
* (C) 2006 Jac Goudsmit added -o option
*/
//config:config GREP
//config: bool "grep (8.5 kb)"
//config: default y
//config: help
//config: grep is used to search files for a specified pattern.
//config:
//config:config EGREP
//config: bool "egrep (7.6 kb)"
//config: default y
//config: help
//config: Alias to "grep -E".
//config:
//config:config FGREP
//config: bool "fgrep (7.6 kb)"
//config: default y
//config: help
//config: Alias to "grep -F".
//config:
//config:config FEATURE_GREP_CONTEXT
//config: bool "Enable before and after context flags (-A, -B and -C)"
//config: default y
//config: depends on GREP || EGREP || FGREP
//config: help
//config: Print the specified number of leading (-B) and/or trailing (-A)
//config: context surrounding our matching lines.
//config: Print the specified number of context lines (-C).
//applet:IF_GREP(APPLET(grep, BB_DIR_BIN, BB_SUID_DROP))
// APPLET_ODDNAME:name main location suid_type help
//applet:IF_EGREP(APPLET_ODDNAME(egrep, grep, BB_DIR_BIN, BB_SUID_DROP, egrep))
//applet:IF_FGREP(APPLET_ODDNAME(fgrep, grep, BB_DIR_BIN, BB_SUID_DROP, fgrep))
//kbuild:lib-$(CONFIG_GREP) += grep.o
//kbuild:lib-$(CONFIG_EGREP) += grep.o
//kbuild:lib-$(CONFIG_FGREP) += grep.o
#include "libbb.h"
#include "common_bufsiz.h"
#include "xregex.h"
/* options */
//usage:#define grep_trivial_usage
//usage: "[-HhnlLoqvsriwFE"
//usage: IF_EXTRA_COMPAT("z")
//usage: "] [-m N] "
//usage: IF_FEATURE_GREP_CONTEXT("[-A/B/C N] ")
//usage: "PATTERN/-e PATTERN.../-f FILE [FILE]..."
//usage:#define grep_full_usage "\n\n"
//usage: "Search for PATTERN in FILEs (or stdin)\n"
//usage: "\n -H Add 'filename:' prefix"
//usage: "\n -h Do not add 'filename:' prefix"
//usage: "\n -n Add 'line_no:' prefix"
//usage: "\n -l Show only names of files that match"
//usage: "\n -L Show only names of files that don't match"
//usage: "\n -c Show only count of matching lines"
//usage: "\n -o Show only the matching part of line"
//usage: "\n -q Quiet. Return 0 if PATTERN is found, 1 otherwise"
//usage: "\n -v Select non-matching lines"
//usage: "\n -s Suppress open and read errors"
//usage: "\n -r Recurse"
//usage: "\n -i Ignore case"
//usage: "\n -w Match whole words only"
//usage: "\n -x Match whole lines only"
//usage: "\n -F PATTERN is a literal (not regexp)"
//usage: "\n -E PATTERN is an extended regexp"
//usage: IF_EXTRA_COMPAT(
//usage: "\n -z Input is NUL terminated"
//usage: )
//usage: "\n -m N Match up to N times per file"
//usage: IF_FEATURE_GREP_CONTEXT(
//usage: "\n -A N Print N lines of trailing context"
//usage: "\n -B N Print N lines of leading context"
//usage: "\n -C N Same as '-A N -B N'"
//usage: )
//usage: "\n -e PTRN Pattern to match"
//usage: "\n -f FILE Read pattern from file"
//usage:
//usage:#define grep_example_usage
//usage: "$ grep root /etc/passwd\n"
//usage: "root:x:0:0:root:/root:/bin/bash\n"
//usage: "$ grep ^[rR]oo. /etc/passwd\n"
//usage: "root:x:0:0:root:/root:/bin/bash\n"
//usage:
//usage:#define egrep_trivial_usage NOUSAGE_STR
//usage:#define egrep_full_usage ""
//usage:#define fgrep_trivial_usage NOUSAGE_STR
//usage:#define fgrep_full_usage ""
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
/* -e,-f are lists; -m,-A,-B,-C have numeric param */
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#define OPTSTR_GREP \
"lnqvscFiHhe:*f:*Lorm:+wx" \
IF_FEATURE_GREP_CONTEXT("A:+B:+C:+") \
"E" \
IF_EXTRA_COMPAT("z") \
"aI"
/* ignored: -a "assume all files to be text" */
/* ignored: -I "assume binary files have no matches" */
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enum {
OPTBIT_l, /* list matched file names only */
OPTBIT_n, /* print line# */
OPTBIT_q, /* quiet - exit(EXIT_SUCCESS) of first match */
OPTBIT_v, /* invert the match, to select non-matching lines */
OPTBIT_s, /* suppress errors about file open errors */
OPTBIT_c, /* count matches per file (suppresses normal output) */
OPTBIT_F, /* literal match */
OPTBIT_i, /* case-insensitive */
OPTBIT_H, /* force filename display */
OPTBIT_h, /* inhibit filename display */
OPTBIT_e, /* -e PATTERN */
OPTBIT_f, /* -f FILE_WITH_PATTERNS */
OPTBIT_L, /* list unmatched file names only */
OPTBIT_o, /* show only matching parts of lines */
OPTBIT_r, /* recurse dirs */
OPTBIT_m, /* -m MAX_MATCHES */
OPTBIT_w, /* -w whole word match */
OPTBIT_x, /* -x whole line match */
IF_FEATURE_GREP_CONTEXT( OPTBIT_A ,) /* -A NUM: after-match context */
IF_FEATURE_GREP_CONTEXT( OPTBIT_B ,) /* -B NUM: before-match context */
IF_FEATURE_GREP_CONTEXT( OPTBIT_C ,) /* -C NUM: -A and -B combined */
OPTBIT_E, /* extended regexp */
IF_EXTRA_COMPAT( OPTBIT_z ,) /* input is NUL terminated */
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OPT_l = 1 << OPTBIT_l,
OPT_n = 1 << OPTBIT_n,
OPT_q = 1 << OPTBIT_q,
OPT_v = 1 << OPTBIT_v,
OPT_s = 1 << OPTBIT_s,
OPT_c = 1 << OPTBIT_c,
OPT_F = 1 << OPTBIT_F,
OPT_i = 1 << OPTBIT_i,
OPT_H = 1 << OPTBIT_H,
OPT_h = 1 << OPTBIT_h,
OPT_e = 1 << OPTBIT_e,
OPT_f = 1 << OPTBIT_f,
OPT_L = 1 << OPTBIT_L,
OPT_o = 1 << OPTBIT_o,
OPT_r = 1 << OPTBIT_r,
OPT_m = 1 << OPTBIT_m,
OPT_w = 1 << OPTBIT_w,
OPT_x = 1 << OPTBIT_x,
OPT_A = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_A)) + 0,
OPT_B = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_B)) + 0,
OPT_C = IF_FEATURE_GREP_CONTEXT( (1 << OPTBIT_C)) + 0,
OPT_E = 1 << OPTBIT_E,
OPT_z = IF_EXTRA_COMPAT( (1 << OPTBIT_z)) + 0,
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};
#define PRINT_FILES_WITH_MATCHES (option_mask32 & OPT_l)
#define PRINT_LINE_NUM (option_mask32 & OPT_n)
#define BE_QUIET (option_mask32 & OPT_q)
#define SUPPRESS_ERR_MSGS (option_mask32 & OPT_s)
#define PRINT_MATCH_COUNTS (option_mask32 & OPT_c)
#define FGREP_FLAG (option_mask32 & OPT_F)
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#define PRINT_FILES_WITHOUT_MATCHES (option_mask32 & OPT_L)
#define NUL_DELIMITED (option_mask32 & OPT_z)
struct globals {
int max_matches;
#if !ENABLE_EXTRA_COMPAT
int reflags;
#else
RE_TRANSLATE_TYPE case_fold; /* RE_TRANSLATE_TYPE is [[un]signed] char* */
#endif
smalluint invert_search;
smalluint print_filename;
smalluint open_errors;
#if ENABLE_FEATURE_GREP_CONTEXT
smalluint did_print_line;
int lines_before;
int lines_after;
char **before_buf;
IF_EXTRA_COMPAT(size_t *before_buf_size;)
int last_line_printed;
#endif
/* globals used internally */
llist_t *pattern_head; /* growable list of patterns to match */
const char *cur_file; /* the current file we are reading */
} FIX_ALIASING;
#define G (*(struct globals*)bb_common_bufsiz1)
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#define INIT_G() do { \
setup_common_bufsiz(); \
BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
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} while (0)
#define max_matches (G.max_matches )
#if !ENABLE_EXTRA_COMPAT
# define reflags (G.reflags )
#else
# define case_fold (G.case_fold )
/* http://www.delorie.com/gnu/docs/regex/regex_46.html */
# define reflags re_syntax_options
# undef REG_NOSUB
# undef REG_EXTENDED
# undef REG_ICASE
# define REG_NOSUB bug:is:here /* should not be used */
/* Just RE_SYNTAX_EGREP is not enough, need to enable {n[,[m]]} too */
# define REG_EXTENDED (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES)
# define REG_ICASE bug:is:here /* should not be used */
#endif
#define invert_search (G.invert_search )
#define print_filename (G.print_filename )
#define open_errors (G.open_errors )
#define did_print_line (G.did_print_line )
#define lines_before (G.lines_before )
#define lines_after (G.lines_after )
#define before_buf (G.before_buf )
#define before_buf_size (G.before_buf_size )
#define last_line_printed (G.last_line_printed )
#define pattern_head (G.pattern_head )
#define cur_file (G.cur_file )
typedef struct grep_list_data_t {
char *pattern;
/* for GNU regex, matched_range must be persistent across grep_file() calls */
#if !ENABLE_EXTRA_COMPAT
regex_t compiled_regex;
regmatch_t matched_range;
#else
struct re_pattern_buffer compiled_regex;
struct re_registers matched_range;
#endif
#define ALLOCATED 1
#define COMPILED 2
int flg_mem_allocated_compiled;
} grep_list_data_t;
#if !ENABLE_EXTRA_COMPAT
#define print_line(line, line_len, linenum, decoration) \
print_line(line, linenum, decoration)
#endif
static void print_line(const char *line, size_t line_len, int linenum, char decoration)
{
#if ENABLE_FEATURE_GREP_CONTEXT
/* Happens when we go to next file, immediately hit match
* and try to print prev context... from prev file! Don't do it */
if (linenum < 1)
return;
/* possibly print the little '--' separator */
if ((lines_before || lines_after) && did_print_line
&& last_line_printed != linenum - 1
) {
puts("--");
}
/* guard against printing "--" before first line of first file */
did_print_line = 1;
last_line_printed = linenum;
#endif
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if (print_filename)
printf("%s%c", cur_file, decoration);
if (PRINT_LINE_NUM)
printf("%i%c", linenum, decoration);
/* Emulate weird GNU grep behavior with -ov */
if ((option_mask32 & (OPT_v|OPT_o)) != (OPT_v|OPT_o)) {
#if !ENABLE_EXTRA_COMPAT
puts(line);
#else
fwrite(line, 1, line_len, stdout);
putchar(NUL_DELIMITED ? '\0' : '\n');
#endif
}
}
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#if ENABLE_EXTRA_COMPAT
/* Unlike getline, this one removes trailing '\n' */
static ssize_t FAST_FUNC bb_getline(char **line_ptr, size_t *line_alloc_len, FILE *file)
{
ssize_t res_sz;
char *line;
int delim = (NUL_DELIMITED ? '\0' : '\n');
res_sz = getdelim(line_ptr, line_alloc_len, delim, file);
line = *line_ptr;
if (res_sz > 0) {
if (line[res_sz - 1] == delim)
line[--res_sz] = '\0';
} else {
free(line); /* uclibc allocates a buffer even on EOF. WTF? */
}
return res_sz;
}
#endif
static int grep_file(FILE *file)
{
smalluint found;
int linenum = 0;
int nmatches = 0;
#if !ENABLE_EXTRA_COMPAT
char *line;
#else
char *line = NULL;
ssize_t line_len;
size_t line_alloc_len;
# define rm_so start[0]
# define rm_eo end[0]
#endif
#if ENABLE_FEATURE_GREP_CONTEXT
int print_n_lines_after = 0;
int curpos = 0; /* track where we are in the circular 'before' buffer */
int idx = 0; /* used for iteration through the circular buffer */
#else
enum { print_n_lines_after = 0 };
#endif
while (
#if !ENABLE_EXTRA_COMPAT
(line = xmalloc_fgetline(file)) != NULL
#else
(line_len = bb_getline(&line, &line_alloc_len, file)) >= 0
#endif
) {
llist_t *pattern_ptr = pattern_head;
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grep_list_data_t *gl = gl; /* for gcc */
linenum++;
found = 0;
while (pattern_ptr) {
gl = (grep_list_data_t *)pattern_ptr->data;
if (FGREP_FLAG) {
char *match;
char *str = line;
opt_f_again:
match = ((option_mask32 & OPT_i)
? strcasestr(str, gl->pattern)
: strstr(str, gl->pattern)
);
if (match) {
if (option_mask32 & OPT_x) {
if (match != str)
goto opt_f_not_found;
if (str[strlen(gl->pattern)] != '\0')
goto opt_f_not_found;
} else
if (option_mask32 & OPT_w) {
char c = (match != line) ? match[-1] : ' ';
if (!isalnum(c) && c != '_') {
c = match[strlen(gl->pattern)];
if (!c || (!isalnum(c) && c != '_'))
goto opt_f_found;
}
str = match + 1;
goto opt_f_again;
}
opt_f_found:
found = 1;
opt_f_not_found: ;
}
} else {
#if ENABLE_EXTRA_COMPAT
unsigned start_pos;
#else
int match_flg;
#endif
char *match_at;
if (!(gl->flg_mem_allocated_compiled & COMPILED)) {
gl->flg_mem_allocated_compiled |= COMPILED;
#if !ENABLE_EXTRA_COMPAT
xregcomp(&gl->compiled_regex, gl->pattern, reflags);
#else
memset(&gl->compiled_regex, 0, sizeof(gl->compiled_regex));
gl->compiled_regex.translate = case_fold; /* for -i */
if (re_compile_pattern(gl->pattern, strlen(gl->pattern), &gl->compiled_regex))
bb_error_msg_and_die("bad regex '%s'", gl->pattern);
#endif
}
#if !ENABLE_EXTRA_COMPAT
gl->matched_range.rm_so = 0;
gl->matched_range.rm_eo = 0;
match_flg = 0;
#else
start_pos = 0;
#endif
match_at = line;
opt_w_again:
//bb_error_msg("'%s' start_pos:%d line_len:%d", match_at, start_pos, line_len);
if (
#if !ENABLE_EXTRA_COMPAT
regexec(&gl->compiled_regex, match_at, 1, &gl->matched_range, match_flg) == 0
#else
re_search(&gl->compiled_regex, match_at, line_len,
start_pos, /*range:*/ line_len,
&gl->matched_range) >= 0
#endif
) {
if (option_mask32 & OPT_x) {
found = (gl->matched_range.rm_so == 0
&& match_at[gl->matched_range.rm_eo] == '\0');
} else
if (!(option_mask32 & OPT_w)) {
found = 1;
} else {
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char c = ' ';
if (match_at > line || gl->matched_range.rm_so != 0) {
c = match_at[gl->matched_range.rm_so - 1];
}
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if (!isalnum(c) && c != '_') {
c = match_at[gl->matched_range.rm_eo];
}
if (!isalnum(c) && c != '_') {
found = 1;
} else {
/*
* Why check gl->matched_range.rm_eo?
* Zero-length match makes -w skip the line:
* "echo foo | grep ^" prints "foo",
* "echo foo | grep -w ^" prints nothing.
* Without such check, we can loop forever.
*/
#if !ENABLE_EXTRA_COMPAT
if (gl->matched_range.rm_eo != 0) {
match_at += gl->matched_range.rm_eo;
match_flg |= REG_NOTBOL;
goto opt_w_again;
}
#else
if (gl->matched_range.rm_eo > start_pos) {
start_pos = gl->matched_range.rm_eo;
goto opt_w_again;
}
#endif
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}
}
}
}
/* If it's non-inverted search, we can stop
* at first match */
if (found && !invert_search)
goto do_found;
pattern_ptr = pattern_ptr->link;
} /* while (pattern_ptr) */
if (found ^ invert_search) {
do_found:
/* keep track of matches */
nmatches++;
/* quiet/print (non)matching file names only? */
if (option_mask32 & (OPT_q|OPT_l|OPT_L)) {
free(line); /* we don't need line anymore */
if (BE_QUIET) {
/* manpage says about -q:
* "exit immediately with zero status
* if any match is found,
* even if errors were detected" */
exit(EXIT_SUCCESS);
}
/* if we're just printing filenames, we stop after the first match */
if (PRINT_FILES_WITH_MATCHES) {
puts(cur_file);
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/* fall through to "return 1" */
}
/* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
return 1; /* one match */
}
#if ENABLE_FEATURE_GREP_CONTEXT
/* Were we printing context and saw next (unwanted) match? */
if ((option_mask32 & OPT_m) && nmatches > max_matches)
break;
#endif
/* print the matched line */
if (PRINT_MATCH_COUNTS == 0) {
#if ENABLE_FEATURE_GREP_CONTEXT
int prevpos = (curpos == 0) ? lines_before - 1 : curpos - 1;
/* if we were told to print 'before' lines and there is at least
* one line in the circular buffer, print them */
if (lines_before && before_buf[prevpos] != NULL) {
int first_buf_entry_line_num = linenum - lines_before;
/* advance to the first entry in the circular buffer, and
* figure out the line number is of the first line in the
* buffer */
idx = curpos;
while (before_buf[idx] == NULL) {
idx = (idx + 1) % lines_before;
first_buf_entry_line_num++;
}
/* now print each line in the buffer, clearing them as we go */
while (before_buf[idx] != NULL) {
print_line(before_buf[idx], before_buf_size[idx], first_buf_entry_line_num, '-');
free(before_buf[idx]);
before_buf[idx] = NULL;
idx = (idx + 1) % lines_before;
first_buf_entry_line_num++;
}
}
/* make a note that we need to print 'after' lines */
print_n_lines_after = lines_after;
#endif
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if (option_mask32 & OPT_o) {
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if (FGREP_FLAG) {
/* -Fo just prints the pattern
* (unless -v: -Fov doesn't print anything at all) */
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if (found)
print_line(gl->pattern, strlen(gl->pattern), linenum, ':');
} else while (1) {
unsigned start = gl->matched_range.rm_so;
unsigned end = gl->matched_range.rm_eo;
unsigned len = end - start;
char old = line[end];
line[end] = '\0';
/* Empty match is not printed: try "echo test | grep -o ''" */
if (len != 0)
print_line(line + start, len, linenum, ':');
if (old == '\0')
break;
line[end] = old;
if (len == 0)
end++;
#if !ENABLE_EXTRA_COMPAT
if (regexec(&gl->compiled_regex, line + end,
1, &gl->matched_range, REG_NOTBOL) != 0)
break;
gl->matched_range.rm_so += end;
gl->matched_range.rm_eo += end;
#else
if (re_search(&gl->compiled_regex, line, line_len,
end, line_len - end,
&gl->matched_range) < 0)
break;
#endif
}
} else {
print_line(line, line_len, linenum, ':');
}
}
}
#if ENABLE_FEATURE_GREP_CONTEXT
else { /* no match */
/* if we need to print some context lines after the last match, do so */
if (print_n_lines_after) {
print_line(line, strlen(line), linenum, '-');
print_n_lines_after--;
} else if (lines_before) {
/* Add the line to the circular 'before' buffer */
free(before_buf[curpos]);
before_buf[curpos] = line;
IF_EXTRA_COMPAT(before_buf_size[curpos] = line_len;)
curpos = (curpos + 1) % lines_before;
/* avoid free(line) - we took the line */
line = NULL;
}
}
#endif /* ENABLE_FEATURE_GREP_CONTEXT */
#if !ENABLE_EXTRA_COMPAT
free(line);
#endif
/* Did we print all context after last requested match? */
if ((option_mask32 & OPT_m)
&& !print_n_lines_after
&& nmatches == max_matches
) {
break;
}
} /* while (read line) */
/* special-case file post-processing for options where we don't print line
* matches, just filenames and possibly match counts */
/* grep -c: print [filename:]count, even if count is zero */
if (PRINT_MATCH_COUNTS) {
2006-10-14 19:54:30 +05:30
if (print_filename)
printf("%s:", cur_file);
2006-10-04 01:26:34 +05:30
printf("%d\n", nmatches);
}
/* grep -L: print just the filename */
if (PRINT_FILES_WITHOUT_MATCHES) {
/* nmatches is zero, no need to check it:
* we return 1 early if we detected a match
* and PRINT_FILES_WITHOUT_MATCHES is set */
puts(cur_file);
}
return nmatches;
}
#if ENABLE_FEATURE_CLEAN_UP
#define new_grep_list_data(p, m) add_grep_list_data(p, m)
static char *add_grep_list_data(char *pattern, int flg_used_mem)
#else
#define new_grep_list_data(p, m) add_grep_list_data(p)
static char *add_grep_list_data(char *pattern)
#endif
{
grep_list_data_t *gl = xzalloc(sizeof(*gl));
gl->pattern = pattern;
#if ENABLE_FEATURE_CLEAN_UP
gl->flg_mem_allocated_compiled = flg_used_mem;
#else
/*gl->flg_mem_allocated_compiled = 0;*/
#endif
return (char *)gl;
}
static void load_regexes_from_file(llist_t *fopt)
{
2006-09-30 02:34:12 +05:30
while (fopt) {
char *line;
FILE *fp;
llist_t *cur = fopt;
char *ffile = cur->data;
fopt = cur->link;
free(cur);
fp = xfopen_stdin(ffile);
while ((line = xmalloc_fgetline(fp)) != NULL) {
llist_add_to(&pattern_head,
new_grep_list_data(line, ALLOCATED));
}
fclose_if_not_stdin(fp);
}
}
static int FAST_FUNC file_action_grep(const char *filename,
struct stat *statbuf,
void* matched,
2008-07-05 14:48:54 +05:30
int depth UNUSED_PARAM)
2006-10-14 19:54:30 +05:30
{
FILE *file;
/* If we are given a link to a directory, we should bail out now, rather
* than trying to open the "file" and hoping getline gives us nothing,
* since that is not portable across operating systems (FreeBSD for
* example will return the raw directory contents). */
if (S_ISLNK(statbuf->st_mode)) {
struct stat sb;
if (stat(filename, &sb) != 0) {
if (!SUPPRESS_ERR_MSGS)
bb_simple_perror_msg(filename);
return 0;
}
if (S_ISDIR(sb.st_mode))
return 1;
}
file = fopen_for_read(filename);
2006-10-14 19:54:30 +05:30
if (file == NULL) {
if (!SUPPRESS_ERR_MSGS)
bb_simple_perror_msg(filename);
2006-10-14 19:54:30 +05:30
open_errors = 1;
return 0;
}
cur_file = filename;
*(int*)matched += grep_file(file);
fclose(file);
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return 1;
}
static int grep_dir(const char *dir)
{
int matched = 0;
recursive_action(dir,
/* recurse=yes */ ACTION_RECURSE |
/* followLinks=command line only */ ACTION_FOLLOWLINKS_L0 |
/* depthFirst=yes */ ACTION_DEPTHFIRST,
2006-10-14 19:54:30 +05:30
/* fileAction= */ file_action_grep,
/* dirAction= */ NULL,
/* userData= */ &matched,
/* depth= */ 0);
2006-10-14 19:54:30 +05:30
return matched;
}
int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int grep_main(int argc UNUSED_PARAM, char **argv)
1999-10-05 21:54:54 +05:30
{
FILE *file;
int matched;
llist_t *fopt = NULL;
#if ENABLE_FEATURE_GREP_CONTEXT
int Copt, opts;
#endif
INIT_G();
/* For grep, exitcode of 1 is "not found". Other errors are 2: */
xfunc_error_retval = 2;
/* do normal option parsing */
#if ENABLE_FEATURE_GREP_CONTEXT
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
/* -H unsets -h; -C unsets -A,-B */
opts = getopt32(argv,
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
"^" OPTSTR_GREP "\0" "H-h:C-AB",
&pattern_head, &fopt, &max_matches,
&lines_after, &lines_before, &Copt);
if (opts & OPT_C) {
/* -C unsets prev -A and -B, but following -A or -B
* may override it */
if (!(opts & OPT_A)) /* not overridden */
lines_after = Copt;
if (!(opts & OPT_B)) /* not overridden */
lines_before = Copt;
}
/* sanity checks */
if (opts & (OPT_c|OPT_q|OPT_l|OPT_L)) {
2007-02-25 08:08:20 +05:30
option_mask32 &= ~OPT_n;
lines_before = 0;
lines_after = 0;
} else if (lines_before > 0) {
if (lines_before > INT_MAX / sizeof(long long))
lines_before = INT_MAX / sizeof(long long);
/* overflow in (lines_before * sizeof(x)) is prevented (above) */
before_buf = xzalloc(lines_before * sizeof(before_buf[0]));
IF_EXTRA_COMPAT(before_buf_size = xzalloc(lines_before * sizeof(before_buf_size[0]));)
}
#else
/* with auto sanity checks */
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
getopt32(argv, "^" OPTSTR_GREP "\0" "H-h:c-n:q-n:l-n:", // why trailing ":"?
&pattern_head, &fopt, &max_matches);
#endif
2007-02-25 08:08:20 +05:30
invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
{ /* convert char **argv to grep_list_data_t */
llist_t *cur;
2006-09-30 02:34:12 +05:30
for (cur = pattern_head; cur; cur = cur->link)
cur->data = new_grep_list_data(cur->data, 0);
}
if (option_mask32 & OPT_f) {
load_regexes_from_file(fopt);
if (!pattern_head) { /* -f EMPTY_FILE? */
/* GNU grep treats it as "nothing matches" */
llist_add_to(&pattern_head, new_grep_list_data((char*) "", 0));
invert_search ^= 1;
}
}
if (ENABLE_FGREP && applet_name[0] == 'f')
2007-02-25 08:08:20 +05:30
option_mask32 |= OPT_F;
#if !ENABLE_EXTRA_COMPAT
if (!(option_mask32 & (OPT_o | OPT_w | OPT_x)))
reflags = REG_NOSUB;
#endif
if ((ENABLE_EGREP && applet_name[0] == 'e')
|| (option_mask32 & OPT_E)
) {
reflags |= REG_EXTENDED;
}
#if ENABLE_EXTRA_COMPAT
else {
reflags = RE_SYNTAX_GREP;
}
#endif
if (option_mask32 & OPT_i) {
#if !ENABLE_EXTRA_COMPAT
reflags |= REG_ICASE;
#else
int i;
case_fold = xmalloc(256);
for (i = 0; i < 256; i++)
case_fold[i] = (unsigned char)i;
for (i = 'a'; i <= 'z'; i++)
case_fold[i] = (unsigned char)(i - ('a' - 'A'));
#endif
}
argv += optind;
/* if we didn't get a pattern from -e and no command file was specified,
* first parameter should be the pattern. no pattern, no worky */
if (pattern_head == NULL) {
2007-02-25 08:08:20 +05:30
char *pattern;
if (*argv == NULL)
2003-03-19 14:43:01 +05:30
bb_show_usage();
2007-02-25 08:08:20 +05:30
pattern = new_grep_list_data(*argv++, 0);
llist_add_to(&pattern_head, pattern);
}
/* argv[0..(argc-1)] should be names of file to grep through. If
2006-10-14 19:54:30 +05:30
* there is more than one file to grep, we will print the filenames. */
if (argv[0] && argv[1])
2006-10-14 19:54:30 +05:30
print_filename = 1;
/* -H / -h of course override */
2007-02-25 08:08:20 +05:30
if (option_mask32 & OPT_H)
print_filename = 1;
2007-02-25 08:08:20 +05:30
if (option_mask32 & OPT_h)
print_filename = 0;
1999-10-05 21:54:54 +05:30
2000-06-29 04:29:30 +05:30
/* If no files were specified, or '-' was specified, take input from
* stdin. Otherwise, we grep through all the files specified. */
matched = 0;
do {
cur_file = *argv;
2006-10-14 19:54:30 +05:30
file = stdin;
if (!cur_file || LONE_DASH(cur_file)) {
cur_file = "(standard input)";
} else {
2007-02-25 08:08:20 +05:30
if (option_mask32 & OPT_r) {
2006-10-14 19:54:30 +05:30
struct stat st;
if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
2007-02-25 08:08:20 +05:30
if (!(option_mask32 & OPT_h))
2006-10-14 20:21:59 +05:30
print_filename = 1;
2006-10-14 19:54:30 +05:30
matched += grep_dir(cur_file);
goto grep_done;
}
}
/* else: fopen(dir) will succeed, but reading won't */
file = fopen_for_read(cur_file);
2006-10-14 19:54:30 +05:30
if (file == NULL) {
if (!SUPPRESS_ERR_MSGS)
bb_simple_perror_msg(cur_file);
2006-10-14 19:54:30 +05:30
open_errors = 1;
continue;
}
}
2006-10-14 19:54:30 +05:30
matched += grep_file(file);
fclose_if_not_stdin(file);
grep_done: ;
} while (*argv && *++argv);
/* destroy all the elements in the pattern list */
if (ENABLE_FEATURE_CLEAN_UP) {
while (pattern_head) {
llist_t *pattern_head_ptr = pattern_head;
grep_list_data_t *gl = (grep_list_data_t *)pattern_head_ptr->data;
pattern_head = pattern_head->link;
if (gl->flg_mem_allocated_compiled & ALLOCATED)
free(gl->pattern);
if (gl->flg_mem_allocated_compiled & COMPILED)
regfree(&gl->compiled_regex);
free(gl);
free(pattern_head_ptr);
}
}
/* 0 = success, 1 = failed, 2 = error */
2006-10-14 19:54:30 +05:30
if (open_errors)
return 2;
return !matched; /* invert return value: 0 = success, 1 = failed */
}