+/* 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> -
+ * 2004,2006 (C) Vladimir Oleynik <dzo@simtreas.ru> -
* correction "-e pattern1 -e pattern2" logic and more optimizations.
+ * precompiled regex
*/
#include <stdio.h>
/* 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)
#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 ""
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 */
static char *cur_file; /* the current file we are reading */
+typedef struct GREP_LIST_DATA {
+ char *pattern;
+ regex_t preg;
+#define PATTERN_MEM_A 1
+#define COMPILED 2
+ int flg_mem_alocated_compiled;
+} grep_list_data_t;
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) {
#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);
}
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;
+ grep_list_data_t * gl;
linenum++;
ret = 0;
while (pattern_ptr) {
- if (fgrep_flag) {
- ret = strstr(line, pattern_ptr->data) != NULL;
+ gl = (grep_list_data_t *)pattern_ptr->data;
+ if (FGREP_FLAG) {
+ ret = strstr(line, gl->pattern) != NULL;
} else {
/*
* test for a postitive-assertion match (regexec returns success (0)
* match (regexec returns failure (REG_NOMATCH) and the user specified
* invert search)
*/
- regex_t regex;
- xregcomp(®ex, pattern_ptr->data, reflags);
- ret |= regexec(®ex, line, 0, NULL, 0) == 0;
- regfree(®ex);
+ if(!(gl->flg_mem_alocated_compiled & COMPILED)) {
+ gl->flg_mem_alocated_compiled |= COMPILED;
+ xregcomp(&(gl->preg), gl->pattern, reflags);
+ }
+ ret |= regexec(&(gl->preg), line, 0, NULL, 0) == 0;
}
pattern_ptr = pattern_ptr->link;
} /* while (pattern_ptr) */
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
/* 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) {
print_line(line, linenum, '-');
print_n_lines_after--;
}
-#endif /* CONFIG_FEATURE_GREP_CONTEXT */
+#endif /* ENABLE_FEATURE_GREP_CONTEXT */
free(line);
}
* 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);
}
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 = xmalloc(sizeof(grep_list_data_t));
+ gl->pattern = pattern;
+#if ENABLE_FEATURE_CLEAN_UP
+ gl->flg_mem_alocated_compiled = flg_used_mem;
+#else
+ gl->flg_mem_alocated_compiled = 0;
+#endif
+ return (char *)gl;
+}
+
+
static void load_regexes_from_file(llist_t *fopt)
{
char *line;
free(cur);
f = bb_xfopen(ffile, "r");
while ((line = bb_get_chomped_line_from_file(f)) != NULL) {
- pattern_head = llist_add_to(pattern_head, line);
+ pattern_head = llist_add_to(pattern_head,
+ new_grep_list_data(line, PATTERN_MEM_A));
}
}
}
-extern int grep_main(int argc, char **argv)
+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;
char *slines_before;
char *Copt;
- bb_opt_complementally = "H-h:e*:f*:C-AB";
+ bb_opt_complementally = "H-h:e::f::C-AB";
opt = bb_getopt_ulflags(argc, argv,
GREP_OPTS GREP_OPT_CONTEXT OPT_EGREP,
&pattern_head, &fopt,
}
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;
lines_after = 0;
} else if(lines_before > 0)
before_buf = (char **)xcalloc(lines_before, sizeof(char *));
- }
+ }
#else
/* with auto sanity checks */
- bb_opt_complementally = "H-h:e*:f*:c-n:q-n:l-n";
+ 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)
print_filename--;
+ if (pattern_head != NULL) {
+ /* convert char *argv[] to grep_list_data_t */
+ llist_t *cur;
+
+ for(cur = pattern_head; cur; cur = cur->link)
+ cur->data = new_grep_list_data(cur->data, 0);
+ }
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)
if (*argv == NULL)
bb_show_usage();
else {
- pattern_head = llist_add_to(pattern_head, *argv++);
+ char *pattern = new_grep_list_data(*argv++, 0);
+
+ pattern_head = llist_add_to(pattern_head, pattern);
argc--;
}
}
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);
+ if (file == NULL) {
+ if (!SUPPRESS_ERR_MSGS)
+ bb_perror_msg("%s", cur_file);
+ error_open_count++;
} else {
matched += grep_file(file);
if(matched < 0) {
* return success */
break;
}
- fclose(file);
- }
+ fclose(file);
}
+ }
-#ifdef CONFIG_FEATURE_CLEAN_UP
/* destroy all the elments in the pattern list */
- while (pattern_head) {
- llist_t *pattern_head_ptr = pattern_head;
-
- pattern_head = pattern_head->link;
- free(pattern_head_ptr);
+ 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_alocated_compiled & PATTERN_MEM_A))
+ free(gl->pattern);
+ if((gl->flg_mem_alocated_compiled & COMPILED))
+ regfree(&(gl->preg));
+ free(pattern_head_ptr);
+ }
}
-#endif
-
+ /* 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;
return !matched; /* invert return value 0 = success, 1 = failed */
}
projects / oweals / busybox.git / blobdiff