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- replace variables by defines to save space

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- rename string denoting stdin from "-" to "(standard input)" to match
  GNU grep.
This commit is contained in:
Bernhard Reutner-Fischer 2005-09-23 15:38:49 +00:00
parent bf4497406f
commit aaf0e23330
1 changed files with 57 additions and 71 deletions
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128
findutils/grep.c
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@ -1,24 +1,15 @@
/* vi: set sw=4 ts=4: */
/*
* Mini grep implementation for busybox using libc regex.
*
* Copyright (C) 1999,2000,2001 by Lineo, inc. and Mark Whitley
* Copyright (C) 1999,2000,2001 by Mark Whitley <markw@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Licensed under the GPL v2, see the file LICENSE in this tarball.
*/
/* BB_AUDIT SUSv3 defects - unsupported option -x. */
/* BB_AUDIT GNU defects - always acts as -a. */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/grep.html */
/*
* Apr 2004 by Vladimir Oleynik <dzo@simtreas.ru> -
* correction "-e pattern1 -e pattern2" logic and more optimizations.
@ -34,30 +25,31 @@
/* options */
static unsigned long opt;
#define GREP_OPTS "lnqvscFiHhe:f:L"
#define GREP_OPT_l (1<<0)
static char print_files_with_matches;
#define PRINT_FILES_WITH_MATCHES (opt & GREP_OPT_l)
#define GREP_OPT_n (1<<1)
static char print_line_num;
#define PRINT_LINE_NUM (opt & GREP_OPT_n)
#define GREP_OPT_q (1<<2)
static char be_quiet;
#define BE_QUIET (opt & GREP_OPT_q)
#define GREP_OPT_v (1<<3)
typedef char invert_search_t;
static invert_search_t invert_search;
#define GREP_OPT_s (1<<4)
static char suppress_err_msgs;
#define SUPPRESS_ERR_MSGS (opt & GREP_OPT_s)
#define GREP_OPT_c (1<<5)
static char print_match_counts;
#define PRINT_MATCH_COUNTS (opt & GREP_OPT_c)
#define GREP_OPT_F (1<<6)
static char fgrep_flag;
#define FGREP_FLAG (opt & GREP_OPT_F)
#define GREP_OPT_i (1<<7)
#define GREP_OPT_H (1<<8)
#define GREP_OPT_h (1<<9)
#define GREP_OPT_e (1<<10)
#define GREP_OPT_f (1<<11)
#define GREP_OPT_L (1<<12)
static char print_files_without_matches;
#ifdef CONFIG_FEATURE_GREP_CONTEXT
#define PRINT_FILES_WITHOUT_MATCHES ((opt & GREP_OPT_L) != 0)
#if ENABLE_FEATURE_GREP_CONTEXT
#define GREP_OPT_CONTEXT "A:B:C"
#define GREP_OPT_A (1<<13)
#define GREP_OPT_B (1<<14)
@ -65,9 +57,12 @@ static char print_files_without_matches;
#define GREP_OPT_E (1<<16)
#else
#define GREP_OPT_CONTEXT ""
#define GREP_OPT_A (0)
#define GREP_OPT_B (0)
#define GREP_OPT_C (0)
#define GREP_OPT_E (1<<13)
#endif
#ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
#if ENABLE_FEATURE_GREP_EGREP_ALIAS
# define OPT_EGREP "E"
#else
# define OPT_EGREP ""
@ -76,12 +71,12 @@ static char print_files_without_matches;
static int reflags;
static int print_filename;
#ifdef CONFIG_FEATURE_GREP_CONTEXT
#if ENABLE_FEATURE_GREP_CONTEXT
static int lines_before;
static int lines_after;
static char **before_buf;
static int last_line_printed;
#endif /* CONFIG_FEATURE_GREP_CONTEXT */
#endif /* ENABLE_FEATURE_GREP_CONTEXT */
/* globals used internally */
static llist_t *pattern_head; /* growable list of patterns to match */
@ -90,7 +85,7 @@ static char *cur_file; /* the current file we are reading */
static void print_line(const char *line, int linenum, char decoration)
{
#ifdef CONFIG_FEATURE_GREP_CONTEXT
#if ENABLE_FEATURE_GREP_CONTEXT
/* possibly print the little '--' separator */
if ((lines_before || lines_after) && last_line_printed &&
last_line_printed < linenum - 1) {
@ -100,7 +95,7 @@ static void print_line(const char *line, int linenum, char decoration)
#endif
if (print_filename > 0)
printf("%s%c", cur_file, decoration);
if (print_line_num)
if (PRINT_LINE_NUM)
printf("%i%c", linenum, decoration);
puts(line);
}
@ -112,11 +107,11 @@ static int grep_file(FILE *file)
invert_search_t ret;
int linenum = 0;
int nmatches = 0;
#ifdef CONFIG_FEATURE_GREP_CONTEXT
#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 */
#endif /* CONFIG_FEATURE_GREP_CONTEXT */
#endif /* ENABLE_FEATURE_GREP_CONTEXT */
while ((line = bb_get_chomped_line_from_file(file)) != NULL) {
llist_t *pattern_ptr = pattern_head;
@ -124,7 +119,7 @@ static int grep_file(FILE *file)
linenum++;
ret = 0;
while (pattern_ptr) {
if (fgrep_flag) {
if (FGREP_FLAG) {
ret = strstr(line, pattern_ptr->data) != NULL;
} else {
/*
@ -143,23 +138,23 @@ static int grep_file(FILE *file)
if ((ret ^ invert_search)) {
if (print_files_with_matches || be_quiet)
if (PRINT_FILES_WITH_MATCHES || BE_QUIET)
free(line);
/* if we found a match but were told to be quiet, stop here */
if (be_quiet || print_files_without_matches)
if (BE_QUIET || PRINT_FILES_WITHOUT_MATCHES)
return -1;
/* keep track of matches */
nmatches++;
/* if we're just printing filenames, we stop after the first match */
if (print_files_with_matches)
if (PRINT_FILES_WITH_MATCHES)
break;
/* print the matched line */
if (print_match_counts == 0) {
#ifdef CONFIG_FEATURE_GREP_CONTEXT
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
@ -188,11 +183,11 @@ static int grep_file(FILE *file)
/* make a note that we need to print 'after' lines */
print_n_lines_after = lines_after;
#endif /* CONFIG_FEATURE_GREP_CONTEXT */
#endif
print_line(line, linenum, ':');
}
}
#ifdef CONFIG_FEATURE_GREP_CONTEXT
#if ENABLE_FEATURE_GREP_CONTEXT
else { /* no match */
/* Add the line to the circular 'before' buffer */
if(lines_before) {
@ -207,7 +202,7 @@ static int grep_file(FILE *file)
print_line(line, linenum, '-');
print_n_lines_after--;
}
#endif /* CONFIG_FEATURE_GREP_CONTEXT */
#endif /* ENABLE_FEATURE_GREP_CONTEXT */
free(line);
}
@ -216,19 +211,19 @@ static int grep_file(FILE *file)
* matches, just filenames and possibly match counts */
/* grep -c: print [filename:]count, even if count is zero */
if (print_match_counts) {
if (PRINT_MATCH_COUNTS) {
if (print_filename > 0)
printf("%s:", cur_file);
printf("%d\n", nmatches);
}
/* grep -l: print just the filename, but only if we grepped the line in the file */
if (print_files_with_matches && nmatches > 0) {
if (PRINT_FILES_WITH_MATCHES && nmatches > 0) {
puts(cur_file);
}
/* grep -L: print just the filename, but only if we didn't grep the line in the file */
if (print_files_without_matches && nmatches == 0) {
if (PRINT_FILES_WITHOUT_MATCHES && nmatches == 0) {
puts(cur_file);
}
@ -258,12 +253,11 @@ extern int grep_main(int argc, char **argv)
{
FILE *file;
int matched;
unsigned long opt;
llist_t *fopt = NULL;
int error_open_count = 0;
/* do normal option parsing */
#ifdef CONFIG_FEATURE_GREP_CONTEXT
#if ENABLE_FEATURE_GREP_CONTEXT
{
char *junk;
char *slines_after;
@ -287,14 +281,14 @@ extern int grep_main(int argc, char **argv)
}
if(opt & GREP_OPT_A) {
lines_after = strtoul(slines_after, &junk, 10);
if(*junk != '\0')
bb_error_msg_and_die("invalid context length argument");
if(*junk != '\0')
bb_error_msg_and_die("invalid context length argument");
}
if(opt & GREP_OPT_B) {
lines_before = strtoul(slines_before, &junk, 10);
if(*junk != '\0')
bb_error_msg_and_die("invalid context length argument");
}
if(*junk != '\0')
bb_error_msg_and_die("invalid context length argument");
}
/* sanity checks after parse may be invalid numbers ;-) */
if ((opt & (GREP_OPT_c|GREP_OPT_q|GREP_OPT_l|GREP_OPT_L))) {
opt &= ~GREP_OPT_n;
@ -308,16 +302,9 @@ extern int grep_main(int argc, char **argv)
bb_opt_complementally = "H-h:e*:f*:c-n:q-n:l-n";
opt = bb_getopt_ulflags(argc, argv, GREP_OPTS OPT_EGREP,
&pattern_head, &fopt);
#endif
print_files_with_matches = opt & GREP_OPT_l;
print_files_without_matches = (opt & GREP_OPT_L) != 0;
print_line_num = opt & GREP_OPT_n;
be_quiet = opt & GREP_OPT_q;
invert_search = (opt & GREP_OPT_v) != 0; /* 0 | 1 */
suppress_err_msgs = opt & GREP_OPT_s;
print_match_counts = opt & GREP_OPT_c;
fgrep_flag = opt & GREP_OPT_F;
if(opt & GREP_OPT_H)
print_filename++;
if(opt & GREP_OPT_h)
@ -325,16 +312,13 @@ extern int grep_main(int argc, char **argv)
if(opt & GREP_OPT_f)
load_regexes_from_file(fopt);
#ifdef CONFIG_FEATURE_GREP_FGREP_ALIAS
if(bb_applet_name[0] == 'f')
fgrep_flag = 1;
#endif
if(ENABLE_FEATURE_GREP_FGREP_ALIAS && bb_applet_name[0] == 'f')
opt |= GREP_OPT_F;
#ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
if(bb_applet_name[0] == 'e' || (opt & GREP_OPT_E))
if(ENABLE_FEATURE_GREP_EGREP_ALIAS &&
(bb_applet_name[0] == 'e' || (opt & GREP_OPT_E)))
reflags = REG_EXTENDED | REG_NOSUB;
else
#endif
reflags = REG_NOSUB;
if(opt & GREP_OPT_i)
@ -368,15 +352,15 @@ extern int grep_main(int argc, char **argv)
while (argc--) {
cur_file = *argv++;
if(!cur_file || (*cur_file == '-' && !cur_file[1])) {
cur_file = "-";
cur_file = "(standard input)";
file = stdin;
} else {
file = fopen(cur_file, "r");
}
if (file == NULL) {
if (!suppress_err_msgs)
bb_perror_msg("%s", cur_file);
error_open_count++;
if (file == NULL) {
if (!SUPPRESS_ERR_MSGS)
bb_perror_msg("%s", cur_file);
error_open_count++;
} else {
matched += grep_file(file);
if(matched < 0) {
@ -388,17 +372,19 @@ extern int grep_main(int argc, char **argv)
}
}
#ifdef CONFIG_FEATURE_CLEAN_UP
/* destroy all the elments in the pattern list */
if (ENABLE_FEATURE_CLEAN_UP)
while (pattern_head) {
llist_t *pattern_head_ptr = pattern_head;
pattern_head = pattern_head->link;
free(pattern_head_ptr);
}
#endif
if(be_quiet && matched)
/* 0 = success, 1 = failed, 2 = error */
/* If the -q option is specified, the exit status shall be zero
* if an input line is selected, even if an error was detected. */
if(BE_QUIET && matched)
return 0;
if(error_open_count)
return 2;