+/* 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>
+ * 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 GPLv2 or later, see file LICENSE in this source tree.
+ */
+/* 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
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <regex.h>
-#include <string.h> /* for strerror() */
-#include <errno.h>
-#include "busybox.h"
-
+//applet:IF_GREP(APPLET(grep, BB_DIR_BIN, BB_SUID_DROP))
+//applet:IF_FEATURE_GREP_EGREP_ALIAS(APPLET_ODDNAME(egrep, grep, BB_DIR_BIN, BB_SUID_DROP, egrep))
+//applet:IF_FEATURE_GREP_FGREP_ALIAS(APPLET_ODDNAME(fgrep, grep, BB_DIR_BIN, BB_SUID_DROP, fgrep))
+
+//kbuild:lib-$(CONFIG_GREP) += grep.o
+
+//config:config GREP
+//config: bool "grep"
+//config: default y
+//config: help
+//config: grep is used to search files for a specified pattern.
+//config:
+//config:config FEATURE_GREP_EGREP_ALIAS
+//config: bool "Enable extended regular expressions (egrep & grep -E)"
+//config: default y
+//config: depends on GREP
+//config: help
+//config: Enabled support for extended regular expressions. Extended
+//config: regular expressions allow for alternation (foo|bar), grouping,
+//config: and various repetition operators.
+//config:
+//config:config FEATURE_GREP_FGREP_ALIAS
+//config: bool "Alias fgrep to grep -F"
+//config: default y
+//config: depends on GREP
+//config: help
+//config: fgrep sees the search pattern as a normal string rather than
+//config: regular expressions.
+//config: grep -F always works, this just creates the fgrep alias.
+//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
+//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).
+
+#include "libbb.h"
+#include "xregex.h"
-extern int optind; /* in unistd.h */
-extern void xregcomp(regex_t *preg, const char *regex, int cflags); /* in busybox.h */
/* options */
-static int reflags = REG_NOSUB;
-static int print_filename = 0;
-static int print_line_num = 0;
-static int print_match_counts = 0;
-static int be_quiet = 0;
-static int invert_search = 0;
-static int suppress_err_msgs = 0;
-static int print_files_with_matches = 0;
-static int fgrep_flag = 0;
-
-#ifdef CONFIG_FEATURE_GREP_CONTEXT
-extern char *optarg; /* in getopt.h */
-static int lines_before = 0;
-static int lines_after = 0;
-static char **before_buf = NULL;
-static int last_line_printed = 0;
-#endif /* CONFIG_FEATURE_GREP_CONTEXT */
-
-/* globals used internally */
-static llist_t *pattern_head = NULL; /* growable list of patterns to match */
-static int matched; /* keeps track of whether we ever matched */
-static char *cur_file = NULL; /* the current file we are reading */
-
-
-static void print_line(const char *line, int linenum, char decoration)
+//usage:#define grep_trivial_usage
+//usage: "[-HhnlLoqvsriw"
+//usage: "F"
+//usage: IF_FEATURE_GREP_EGREP_ALIAS("E")
+//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: IF_FEATURE_GREP_EGREP_ALIAS(
+//usage: "\n -E PATTERN is an extended regexp"
+//usage: )
+//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 ""
+
+#define OPTSTR_GREP \
+ "lnqvscFiHhe:f:Lorm:wx" \
+ IF_FEATURE_GREP_CONTEXT("A:B:C:") \
+ IF_FEATURE_GREP_EGREP_ALIAS("E") \
+ IF_EXTRA_COMPAT("z") \
+ "aI"
+/* ignored: -a "assume all files to be text" */
+/* ignored: -I "assume binary files have no matches" */
+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 */
+ IF_FEATURE_GREP_EGREP_ALIAS(OPTBIT_E ,) /* extended regexp */
+ IF_EXTRA_COMPAT( OPTBIT_z ,) /* input is NUL terminated */
+ 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 = IF_FEATURE_GREP_EGREP_ALIAS((1 << OPTBIT_E)) + 0,
+ OPT_z = IF_EXTRA_COMPAT( (1 << OPTBIT_z)) + 0,
+};
+
+#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)
+#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)
+#define INIT_G() do { \
+ struct G_sizecheck { \
+ char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
+ }; \
+} 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_alocated_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)
{
-#ifdef CONFIG_FEATURE_GREP_CONTEXT
- /* possibly print the little '--' seperator */
- if ((lines_before || lines_after) && last_line_printed &&
- last_line_printed < linenum - 1) {
+#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
if (print_filename)
printf("%s%c", cur_file, decoration);
- if (print_line_num)
+ if (PRINT_LINE_NUM)
printf("%i%c", linenum, decoration);
- puts(line);
+ /* 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
+ }
}
+#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 void grep_file(FILE *file)
+static int grep_file(FILE *file)
{
- char *line = NULL;
- int ret;
+ smalluint found;
int linenum = 0;
int nmatches = 0;
-#ifdef CONFIG_FEATURE_GREP_CONTEXT
+#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 */
-#endif /* CONFIG_FEATURE_GREP_CONTEXT */
+#else
+ enum { print_n_lines_after = 0 };
+#endif
- while ((line = bb_get_chomped_line_from_file(file)) != NULL) {
+ 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;
+ grep_list_data_t *gl = gl; /* for gcc */
linenum++;
-
+ found = 0;
while (pattern_ptr) {
- if (fgrep_flag) {
- if (strstr(line, pattern_ptr->data)) {
- /* Match found */
- ret = 0;
- } else {
- ret = 1;
+ 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 != str) ? 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 {
- /*
- * test for a postitive-assertion match (regexec returns success (0)
- * and the user did not specify invert search), or a negative-assertion
- * 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);
- regfree(®ex);
+#if ENABLE_EXTRA_COMPAT
+ unsigned start_pos;
+#endif
+ char *match_at;
+
+ if (!(gl->flg_mem_alocated_compiled & COMPILED)) {
+ gl->flg_mem_alocated_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;
+#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, 0) == 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 {
+ char c = ' ';
+ if (gl->matched_range.rm_so)
+ c = match_at[gl->matched_range.rm_so - 1];
+ if (!isalnum(c) && c != '_') {
+ c = match_at[gl->matched_range.rm_eo];
+ if (!c || (!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;
+ 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
+ }
+ }
+ }
+ }
}
- if ((ret == 0 && !invert_search) || (ret == REG_NOMATCH && invert_search)) {
-
- /* if we found a match but were told to be quiet, stop here and
- * return success */
- if (be_quiet)
- exit(0);
-
- /* keep track of matches */
- nmatches++;
-
+ /* 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)
- break;
-
- /* print the matched line */
- if (print_match_counts == 0) {
-#ifdef CONFIG_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++;
- }
+ if (PRINT_FILES_WITH_MATCHES) {
+ puts(cur_file);
+ /* fall through to "return 1" */
+ }
+ /* OPT_L aka PRINT_FILES_WITHOUT_MATCHES: return early */
+ return 1; /* one match */
+ }
- /* now print each line in the buffer, clearing them as we go */
- while (before_buf[idx] != NULL) {
- print_line(before_buf[idx], first_buf_entry_line_num, '-');
- free(before_buf[idx]);
- before_buf[idx] = NULL;
- idx = (idx + 1) % lines_before;
- first_buf_entry_line_num++;
- }
+#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++;
}
- /* make a note that we need to print 'after' lines */
- print_n_lines_after = lines_after;
-#endif /* CONFIG_FEATURE_GREP_CONTEXT */
- print_line(line, linenum, ':');
+ /* 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++;
+ }
}
- }
-#ifdef CONFIG_FEATURE_GREP_CONTEXT
- else { /* no match */
- /* Add the line to the circular 'before' buffer */
- if(lines_before) {
- free(before_buf[curpos]);
- before_buf[curpos] = bb_xstrdup(line);
- curpos = (curpos + 1) % lines_before;
+
+ /* make a note that we need to print 'after' lines */
+ print_n_lines_after = lines_after;
+#endif
+ if (option_mask32 & OPT_o) {
+ if (FGREP_FLAG) {
+ /* -Fo just prints the pattern
+ * (unless -v: -Fov doesnt print anything at all) */
+ 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 && (last_line_printed != linenum)) {
- print_line(line, linenum, '-');
+ 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 /* CONFIG_FEATURE_GREP_CONTEXT */
- pattern_ptr = pattern_ptr->link;
- } /* for */
- free(line);
- }
+ }
+#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) {
+ if (PRINT_MATCH_COUNTS) {
if (print_filename)
printf("%s:", cur_file);
- if (print_files_with_matches && nmatches > 0)
- printf("1\n");
- else
- printf("%d\n", nmatches);
+ 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) {
+ /* 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);
}
-
- /* remember if we matched */
- if (nmatches != 0)
- matched = 1;
+ return nmatches;
}
-#if 0
-static void add_pattern(char *restr)
+#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
{
-// regexes = xrealloc(regexes, sizeof(regex_t) * (++nregexes));
-// xregcomp(®exes[nregexes-1], restr, reflags);
- pattern_head = llist_add_to(pattern_head, restr);
-}
+ grep_list_data_t *gl = xzalloc(sizeof(*gl));
+ 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(const char *filename)
+static void load_regexes_from_file(llist_t *fopt)
{
- char *line;
- FILE *f = bb_xfopen(filename, "r");
- while ((line = bb_get_chomped_line_from_file(f)) != NULL) {
- pattern_head = llist_add_to(pattern_head, line);
+ 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 UNUSED_PARAM,
+ void* matched,
+ int depth UNUSED_PARAM)
+{
+ FILE *file = fopen_for_read(filename);
+ if (file == NULL) {
+ if (!SUPPRESS_ERR_MSGS)
+ bb_simple_perror_msg(filename);
+ open_errors = 1;
+ return 0;
+ }
+ cur_file = filename;
+ *(int*)matched += grep_file(file);
+ fclose(file);
+ return 1;
+}
-#ifdef CONFIG_FEATURE_CLEAN_UP
-static void destroy_regexes(void)
+static int grep_dir(const char *dir)
{
- llist_t *pattern_head_ptr;
+ int matched = 0;
+ recursive_action(dir,
+ /* recurse=yes */ ACTION_RECURSE |
+ /* followLinks=no */
+ /* depthFirst=yes */ ACTION_DEPTHFIRST,
+ /* fileAction= */ file_action_grep,
+ /* dirAction= */ NULL,
+ /* userData= */ &matched,
+ /* depth= */ 0);
+ return matched;
+}
- if (pattern_head == NULL)
- return;
+int grep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int grep_main(int argc UNUSED_PARAM, char **argv)
+{
+ FILE *file;
+ int matched;
+ llist_t *fopt = NULL;
- /* destroy all the elments in the pattern list */
- while (pattern_head) {
- pattern_head_ptr = pattern_head;
- pattern_head = pattern_head->link;
- free(pattern_head_ptr->data);
- free(pattern_head_ptr);
+ /* do normal option parsing */
+#if ENABLE_FEATURE_GREP_CONTEXT
+ int Copt, opts;
+
+ /* -H unsets -h; -C unsets -A,-B; -e,-f are lists;
+ * -m,-A,-B,-C have numeric param */
+ opt_complementary = "H-h:C-AB:e::f::m+:A+:B+:C+";
+ opts = getopt32(argv,
+ OPTSTR_GREP,
+ &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)) {
+ 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 */
+ /* -H unsets -h; -c,-q or -l unset -n; -e,-f are lists; -m N */
+ opt_complementary = "H-h:c-n:q-n:l-n:e::f::m+";
+ getopt32(argv, OPTSTR_GREP,
+ &pattern_head, &fopt, &max_matches);
#endif
+ invert_search = ((option_mask32 & OPT_v) != 0); /* 0 | 1 */
+ { /* 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 (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;
+ }
+ }
-extern int grep_main(int argc, char **argv)
-{
- int opt;
-#if defined (CONFIG_FEATURE_GREP_CONTEXT)
- char *junk;
-#endif
+ if (ENABLE_FEATURE_GREP_FGREP_ALIAS && applet_name[0] == 'f')
+ option_mask32 |= OPT_F;
-#ifdef CONFIG_FEATURE_CLEAN_UP
- /* destroy command strings on exit */
- atexit(destroy_regexes);
+#if !ENABLE_EXTRA_COMPAT
+ if (!(option_mask32 & (OPT_o | OPT_w | OPT_x)))
+ reflags = REG_NOSUB;
#endif
-#ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
- if (strcmp(bb_get_last_path_component(argv[0]), "egrep") == 0)
+ if (ENABLE_FEATURE_GREP_EGREP_ALIAS
+ && (applet_name[0] == 'e' || (option_mask32 & OPT_E))
+ ) {
reflags |= REG_EXTENDED;
+ }
+#if ENABLE_EXTRA_COMPAT
+ else {
+ reflags = RE_SYNTAX_GREP;
+ }
#endif
- /* do normal option parsing */
- while ((opt = getopt(argc, argv, "iHhlnqvsce:f:F"
-#ifdef CONFIG_FEATURE_GREP_CONTEXT
-"A:B:C:"
-#endif
-#ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
-"E"
-#endif
-)) > 0) {
- switch (opt) {
- case 'i':
- reflags |= REG_ICASE;
- break;
- case 'l':
- print_files_with_matches++;
- break;
- case 'H':
- print_filename++;
- break;
- case 'h':
- print_filename--;
- break;
- case 'n':
- print_line_num++;
- break;
- case 'q':
- be_quiet++;
- break;
- case 'v':
- invert_search++;
- break;
- case 's':
- suppress_err_msgs++;
- break;
- case 'c':
- print_match_counts++;
- break;
- case 'e':
- pattern_head = llist_add_to(pattern_head, strdup(optarg));
- break;
-#ifdef CONFIG_FEATURE_GREP_EGREP_ALIAS
- case 'E':
- reflags |= REG_EXTENDED;
- break;
+ 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
- case 'F':
- fgrep_flag = 1;
- break;
- case 'f':
- load_regexes_from_file(optarg);
- break;
-#ifdef CONFIG_FEATURE_GREP_CONTEXT
- case 'A':
- lines_after = strtoul(optarg, &junk, 10);
- if(*junk != '\0')
- bb_error_msg_and_die("invalid context length argument");
- break;
- case 'B':
- lines_before = strtoul(optarg, &junk, 10);
- if(*junk != '\0')
- bb_error_msg_and_die("invalid context length argument");
- before_buf = (char **)xcalloc(lines_before, sizeof(char *));
- break;
- case 'C':
- lines_after = lines_before = strtoul(optarg, &junk, 10);
- if(*junk != '\0')
- bb_error_msg_and_die("invalid context length argument");
- before_buf = (char **)xcalloc(lines_before, sizeof(char *));
- break;
-#endif /* CONFIG_FEATURE_GREP_CONTEXT */
- default:
- bb_show_usage();
- }
}
- /* if we didn't get a pattern from a -e and no command file was specified,
- * argv[optind] should be the pattern. no pattern, no worky */
+ 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) {
- if (argv[optind] == NULL)
+ char *pattern;
+ if (*argv == NULL)
bb_show_usage();
- else {
- pattern_head = llist_add_to(pattern_head, strdup(argv[optind]));
- optind++;
- }
+ pattern = new_grep_list_data(*argv++, 0);
+ llist_add_to(&pattern_head, pattern);
}
- /* sanity checks */
- if (print_match_counts || be_quiet || print_files_with_matches) {
- print_line_num = 0;
-#ifdef CONFIG_FEATURE_GREP_CONTEXT
- lines_before = 0;
- lines_after = 0;
-#endif
- }
-
- /* argv[(optind)..(argc-1)] should be names of file to grep through. If
- * there is more than one file to grep, we will print the filenames */
- if ((argc-1) - (optind) > 0)
- print_filename++;
+ /* argv[0..(argc-1)] should be names of file to grep through. If
+ * there is more than one file to grep, we will print the filenames. */
+ if (argv[0] && argv[1])
+ print_filename = 1;
+ /* -H / -h of course override */
+ if (option_mask32 & OPT_H)
+ print_filename = 1;
+ if (option_mask32 & OPT_h)
+ print_filename = 0;
/* If no files were specified, or '-' was specified, take input from
* stdin. Otherwise, we grep through all the files specified. */
- if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
- grep_file(stdin);
- }
- else {
- int i;
- FILE *file;
- for (i = optind; i < argc; i++) {
- cur_file = argv[i];
- file = fopen(cur_file, "r");
- if (file == NULL) {
- if (!suppress_err_msgs)
- bb_perror_msg("%s", cur_file);
+ matched = 0;
+ do {
+ cur_file = *argv;
+ file = stdin;
+ if (!cur_file || LONE_DASH(cur_file)) {
+ cur_file = "(standard input)";
+ } else {
+ if (option_mask32 & OPT_r) {
+ struct stat st;
+ if (stat(cur_file, &st) == 0 && S_ISDIR(st.st_mode)) {
+ if (!(option_mask32 & OPT_h))
+ print_filename = 1;
+ matched += grep_dir(cur_file);
+ goto grep_done;
+ }
}
- else {
- grep_file(file);
- fclose(file);
+ /* else: fopen(dir) will succeed, but reading won't */
+ file = fopen_for_read(cur_file);
+ if (file == NULL) {
+ if (!SUPPRESS_ERR_MSGS)
+ bb_simple_perror_msg(cur_file);
+ open_errors = 1;
+ continue;
}
}
- }
+ matched += grep_file(file);
+ fclose_if_not_stdin(file);
+ grep_done: ;
+ } while (*argv && *++argv);
- return !matched; /* invert return value 0 = success, 1 = failed */
+ /* destroy all the elments 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_alocated_compiled & ALLOCATED)
+ free(gl->pattern);
+ if (gl->flg_mem_alocated_compiled & COMPILED)
+ regfree(&gl->compiled_regex);
+ free(gl);
+ free(pattern_head_ptr);
+ }
+ }
+ /* 0 = success, 1 = failed, 2 = error */
+ if (open_errors)
+ return 2;
+ return !matched; /* invert return value: 0 = success, 1 = failed */
}
projects / platform / upstream / busybox.git / blobdiff