/* $NetBSD: grep.c,v 1.11 2012/05/06 22:27:00 joerg Exp $ */
/* $FreeBSD: head/usr.bin/grep/grep.c 211519 2010-08-19 22:55:17Z delphij $ */
/* $OpenBSD: grep.c,v 1.42 2010/07/02 22:18:03 tedu Exp $ */
/*-
* Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
* Copyright (C) 2008-2009 Gabor Kovesdan <gabor@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
__RCSID("$NetBSD: grep.c,v 1.11 2012/05/06 22:27:00 joerg Exp $");
#include <sys/stat.h>
#include <sys/types.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <libgen.h>
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "grep.h"
#ifndef WITHOUT_NLS
#include <nl_types.h>
nl_catd catalog;
#endif
/*
* Default messags to use when NLS is disabled or no catalogue
* is found.
*/
const char *errstr[] = {
"",
/* 1*/ "(standard input)",
/* 2*/ "cannot read bzip2 compressed file",
/* 3*/ "unknown %s option",
/* 4*/ "usage: %s [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZz] [-A num] [-B num] [-C[num]]\n",
/* 5*/ "\t[-e pattern] [-f file] [--binary-files=value] [--color=when]\n",
/* 6*/ "\t[--context[=num]] [--directories=action] [--label] [--line-buffered]\n",
/* 7*/ "\t[pattern] [file ...]\n",
/* 8*/ "Binary file %s matches\n",
/* 9*/ "%s (BSD grep) %s\n",
};
/* Flags passed to regcomp() and regexec() */
int cflags = 0;
int eflags = REG_STARTEND;
/* Searching patterns */
unsigned int patterns, pattern_sz;
char **pattern;
regex_t *r_pattern;
fastgrep_t *fg_pattern;
/* Filename exclusion/inclusion patterns */
unsigned int fpatterns, fpattern_sz;
unsigned int dpatterns, dpattern_sz;
struct epat *dpattern, *fpattern;
/* For regex errors */
char re_error[RE_ERROR_BUF + 1];
/* Command-line flags */
unsigned long long Aflag; /* -A x: print x lines trailing each match */
unsigned long long Bflag; /* -B x: print x lines leading each match */
bool Hflag; /* -H: always print file name */
bool Lflag; /* -L: only show names of files with no matches */
bool bflag; /* -b: show block numbers for each match */
bool cflag; /* -c: only show a count of matching lines */
bool hflag; /* -h: don't print filename headers */
bool iflag; /* -i: ignore case */
bool lflag; /* -l: only show names of files with matches */
bool mflag; /* -m x: stop reading the files after x matches */
unsigned long long mcount; /* count for -m */
bool nflag; /* -n: show line numbers in front of matching lines */
bool oflag; /* -o: print only matching part */
bool qflag; /* -q: quiet mode (don't output anything) */
bool sflag; /* -s: silent mode (ignore errors) */
bool vflag; /* -v: only show non-matching lines */
bool wflag; /* -w: pattern must start and end on word boundaries */
bool xflag; /* -x: pattern must match entire line */
bool lbflag; /* --line-buffered */
bool nullflag; /* --null */
bool nulldataflag; /* --null-data */
unsigned char line_sep = '\n'; /* 0 for --null-data */
char *label; /* --label */
const char *color; /* --color */
int grepbehave = GREP_BASIC; /* -EFGP: type of the regex */
int binbehave = BINFILE_BIN; /* -aIU: handling of binary files */
int filebehave = FILE_STDIO; /* -JZ: normal, gzip or bzip2 file */
int devbehave = DEV_READ; /* -D: handling of devices */
int dirbehave = DIR_READ; /* -dRr: handling of directories */
int linkbehave = LINK_READ; /* -OpS: handling of symlinks */
bool dexclude, dinclude; /* --exclude-dir and --include-dir */
bool fexclude, finclude; /* --exclude and --include */
enum {
BIN_OPT = CHAR_MAX + 1,
COLOR_OPT,
DECOMPRESS_OPT,
HELP_OPT,
MMAP_OPT,
LINEBUF_OPT,
LABEL_OPT,
R_EXCLUDE_OPT,
R_INCLUDE_OPT,
R_DEXCLUDE_OPT,
R_DINCLUDE_OPT
};
static inline const char *init_color(const char *);
/* Housekeeping */
int tail; /* lines left to print */
bool notfound; /* file not found */
extern char *__progname;
/*
* Prints usage information and returns 2.
*/
__dead static void
usage(void)
{
fprintf(stderr, getstr(4), __progname);
fprintf(stderr, "%s", getstr(5));
fprintf(stderr, "%s", getstr(5));
fprintf(stderr, "%s", getstr(6));
fprintf(stderr, "%s", getstr(7));
exit(2);
}
static const char optstr[] =
"0123456789A:B:C:D:EFGHIJLOPSRUVZabcd:e:f:hilm:nopqrsuvwxyz";
struct option long_options[] =
{
{"binary-files", required_argument, NULL, BIN_OPT},
{"decompress", no_argument, NULL, DECOMPRESS_OPT},
{"help", no_argument, NULL, HELP_OPT},
{"mmap", no_argument, NULL, MMAP_OPT},
{"line-buffered", no_argument, NULL, LINEBUF_OPT},
{"label", required_argument, NULL, LABEL_OPT},
{"color", optional_argument, NULL, COLOR_OPT},
{"colour", optional_argument, NULL, COLOR_OPT},
{"exclude", required_argument, NULL, R_EXCLUDE_OPT},
{"include", required_argument, NULL, R_INCLUDE_OPT},
{"exclude-dir", required_argument, NULL, R_DEXCLUDE_OPT},
{"include-dir", required_argument, NULL, R_DINCLUDE_OPT},
{"after-context", required_argument, NULL, 'A'},
{"text", no_argument, NULL, 'a'},
{"before-context", required_argument, NULL, 'B'},
{"byte-offset", no_argument, NULL, 'b'},
{"context", optional_argument, NULL, 'C'},
{"count", no_argument, NULL, 'c'},
{"devices", required_argument, NULL, 'D'},
{"directories", required_argument, NULL, 'd'},
{"extended-regexp", no_argument, NULL, 'E'},
{"regexp", required_argument, NULL, 'e'},
{"fixed-strings", no_argument, NULL, 'F'},
{"file", required_argument, NULL, 'f'},
{"basic-regexp", no_argument, NULL, 'G'},
{"no-filename", no_argument, NULL, 'h'},
{"with-filename", no_argument, NULL, 'H'},
{"ignore-case", no_argument, NULL, 'i'},
{"bz2decompress", no_argument, NULL, 'J'},
{"files-with-matches", no_argument, NULL, 'l'},
{"files-without-match", no_argument, NULL, 'L'},
{"max-count", required_argument, NULL, 'm'},
{"line-number", no_argument, NULL, 'n'},
{"only-matching", no_argument, NULL, 'o'},
{"quiet", no_argument, NULL, 'q'},
{"silent", no_argument, NULL, 'q'},
{"recursive", no_argument, NULL, 'r'},
{"no-messages", no_argument, NULL, 's'},
{"binary", no_argument, NULL, 'U'},
{"unix-byte-offsets", no_argument, NULL, 'u'},
{"invert-match", no_argument, NULL, 'v'},
{"version", no_argument, NULL, 'V'},
{"word-regexp", no_argument, NULL, 'w'},
{"line-regexp", no_argument, NULL, 'x'},
{"null", no_argument, NULL, 'Z'},
{"null-data", no_argument, NULL, 'z'},
{NULL, no_argument, NULL, 0}
};
/*
* Adds a searching pattern to the internal array.
*/
static void
add_pattern(char *pat, size_t l
