708 lines
18 KiB
C
708 lines
18 KiB
C
/* $NetBSD: grep.c,v 1.11 2012/05/06 22:27:00 joerg Exp $ */
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/* $FreeBSD: head/usr.bin/grep/grep.c 211519 2010-08-19 22:55:17Z delphij $ */
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/* $OpenBSD: grep.c,v 1.42 2010/07/02 22:18:03 tedu Exp $ */
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/*-
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* Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
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* Copyright (C) 2008-2009 Gabor Kovesdan <gabor@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: grep.c,v 1.11 2012/05/06 22:27:00 joerg Exp $");
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <getopt.h>
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#include <limits.h>
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#include <libgen.h>
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#include <locale.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "grep.h"
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#ifndef WITHOUT_NLS
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#include <nl_types.h>
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nl_catd catalog;
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#endif
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/*
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* Default messags to use when NLS is disabled or no catalogue
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* is found.
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*/
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const char *errstr[] = {
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"",
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/* 1*/ "(standard input)",
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/* 2*/ "cannot read bzip2 compressed file",
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/* 3*/ "unknown %s option",
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/* 4*/ "usage: %s [-abcDEFGHhIiJLlmnOoPqRSsUVvwxZz] [-A num] [-B num] [-C[num]]\n",
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/* 5*/ "\t[-e pattern] [-f file] [--binary-files=value] [--color=when]\n",
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/* 6*/ "\t[--context[=num]] [--directories=action] [--label] [--line-buffered]\n",
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/* 7*/ "\t[pattern] [file ...]\n",
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/* 8*/ "Binary file %s matches\n",
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/* 9*/ "%s (BSD grep) %s\n",
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};
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/* Flags passed to regcomp() and regexec() */
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int cflags = 0;
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int eflags = REG_STARTEND;
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/* Searching patterns */
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unsigned int patterns, pattern_sz;
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char **pattern;
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regex_t *r_pattern;
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fastgrep_t *fg_pattern;
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/* Filename exclusion/inclusion patterns */
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unsigned int fpatterns, fpattern_sz;
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unsigned int dpatterns, dpattern_sz;
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struct epat *dpattern, *fpattern;
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/* For regex errors */
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char re_error[RE_ERROR_BUF + 1];
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/* Command-line flags */
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unsigned long long Aflag; /* -A x: print x lines trailing each match */
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unsigned long long Bflag; /* -B x: print x lines leading each match */
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bool Hflag; /* -H: always print file name */
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bool Lflag; /* -L: only show names of files with no matches */
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bool bflag; /* -b: show block numbers for each match */
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bool cflag; /* -c: only show a count of matching lines */
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bool hflag; /* -h: don't print filename headers */
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bool iflag; /* -i: ignore case */
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bool lflag; /* -l: only show names of files with matches */
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bool mflag; /* -m x: stop reading the files after x matches */
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unsigned long long mcount; /* count for -m */
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bool nflag; /* -n: show line numbers in front of matching lines */
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bool oflag; /* -o: print only matching part */
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bool qflag; /* -q: quiet mode (don't output anything) */
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bool sflag; /* -s: silent mode (ignore errors) */
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bool vflag; /* -v: only show non-matching lines */
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bool wflag; /* -w: pattern must start and end on word boundaries */
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bool xflag; /* -x: pattern must match entire line */
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bool lbflag; /* --line-buffered */
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bool nullflag; /* --null */
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bool nulldataflag; /* --null-data */
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unsigned char line_sep = '\n'; /* 0 for --null-data */
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char *label; /* --label */
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const char *color; /* --color */
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int grepbehave = GREP_BASIC; /* -EFGP: type of the regex */
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int binbehave = BINFILE_BIN; /* -aIU: handling of binary files */
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int filebehave = FILE_STDIO; /* -JZ: normal, gzip or bzip2 file */
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int devbehave = DEV_READ; /* -D: handling of devices */
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int dirbehave = DIR_READ; /* -dRr: handling of directories */
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int linkbehave = LINK_READ; /* -OpS: handling of symlinks */
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bool dexclude, dinclude; /* --exclude-dir and --include-dir */
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bool fexclude, finclude; /* --exclude and --include */
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enum {
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BIN_OPT = CHAR_MAX + 1,
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COLOR_OPT,
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DECOMPRESS_OPT,
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HELP_OPT,
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MMAP_OPT,
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LINEBUF_OPT,
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LABEL_OPT,
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R_EXCLUDE_OPT,
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R_INCLUDE_OPT,
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R_DEXCLUDE_OPT,
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R_DINCLUDE_OPT
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};
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static inline const char *init_color(const char *);
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/* Housekeeping */
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int tail; /* lines left to print */
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bool notfound; /* file not found */
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extern char *__progname;
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/*
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* Prints usage information and returns 2.
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*/
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__dead static void
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usage(void)
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{
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fprintf(stderr, getstr(4), __progname);
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fprintf(stderr, "%s", getstr(5));
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fprintf(stderr, "%s", getstr(5));
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fprintf(stderr, "%s", getstr(6));
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fprintf(stderr, "%s", getstr(7));
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exit(2);
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}
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static const char optstr[] =
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"0123456789A:B:C:D:EFGHIJLOPSRUVZabcd:e:f:hilm:nopqrsuvwxyz";
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struct option long_options[] =
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{
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{"binary-files", required_argument, NULL, BIN_OPT},
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{"decompress", no_argument, NULL, DECOMPRESS_OPT},
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{"help", no_argument, NULL, HELP_OPT},
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{"mmap", no_argument, NULL, MMAP_OPT},
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{"line-buffered", no_argument, NULL, LINEBUF_OPT},
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{"label", required_argument, NULL, LABEL_OPT},
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{"color", optional_argument, NULL, COLOR_OPT},
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{"colour", optional_argument, NULL, COLOR_OPT},
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{"exclude", required_argument, NULL, R_EXCLUDE_OPT},
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{"include", required_argument, NULL, R_INCLUDE_OPT},
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{"exclude-dir", required_argument, NULL, R_DEXCLUDE_OPT},
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{"include-dir", required_argument, NULL, R_DINCLUDE_OPT},
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{"after-context", required_argument, NULL, 'A'},
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{"text", no_argument, NULL, 'a'},
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{"before-context", required_argument, NULL, 'B'},
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{"byte-offset", no_argument, NULL, 'b'},
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{"context", optional_argument, NULL, 'C'},
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{"count", no_argument, NULL, 'c'},
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{"devices", required_argument, NULL, 'D'},
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{"directories", required_argument, NULL, 'd'},
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{"extended-regexp", no_argument, NULL, 'E'},
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{"regexp", required_argument, NULL, 'e'},
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{"fixed-strings", no_argument, NULL, 'F'},
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{"file", required_argument, NULL, 'f'},
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{"basic-regexp", no_argument, NULL, 'G'},
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{"no-filename", no_argument, NULL, 'h'},
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{"with-filename", no_argument, NULL, 'H'},
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{"ignore-case", no_argument, NULL, 'i'},
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{"bz2decompress", no_argument, NULL, 'J'},
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{"files-with-matches", no_argument, NULL, 'l'},
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{"files-without-match", no_argument, NULL, 'L'},
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{"max-count", required_argument, NULL, 'm'},
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{"line-number", no_argument, NULL, 'n'},
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{"only-matching", no_argument, NULL, 'o'},
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{"quiet", no_argument, NULL, 'q'},
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{"silent", no_argument, NULL, 'q'},
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{"recursive", no_argument, NULL, 'r'},
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{"no-messages", no_argument, NULL, 's'},
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{"binary", no_argument, NULL, 'U'},
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{"unix-byte-offsets", no_argument, NULL, 'u'},
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{"invert-match", no_argument, NULL, 'v'},
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{"version", no_argument, NULL, 'V'},
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{"word-regexp", no_argument, NULL, 'w'},
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{"line-regexp", no_argument, NULL, 'x'},
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{"null", no_argument, NULL, 'Z'},
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{"null-data", no_argument, NULL, 'z'},
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{NULL, no_argument, NULL, 0}
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};
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/*
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* Adds a searching pattern to the internal array.
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*/
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static void
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add_pattern(char *pat, size_t len)
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{
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/* TODO: Check for empty patterns and shortcut */
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/* Increase size if necessary */
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if (patterns == pattern_sz) {
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pattern_sz *= 2;
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pattern = grep_realloc(pattern, ++pattern_sz *
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sizeof(*pattern));
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}
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if (len > 0 && pat[len - 1] == '\n')
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--len;
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/* pat may not be NUL-terminated */
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pattern[patterns] = grep_malloc(len + 1);
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memcpy(pattern[patterns], pat, len);
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pattern[patterns][len] = '\0';
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++patterns;
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}
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/*
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* Adds a file include/exclude pattern to the internal array.
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*/
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static void
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add_fpattern(const char *pat, int mode)
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{
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/* Increase size if necessary */
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if (fpatterns == fpattern_sz) {
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fpattern_sz *= 2;
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fpattern = grep_realloc(fpattern, ++fpattern_sz *
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sizeof(struct epat));
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}
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fpattern[fpatterns].pat = grep_strdup(pat);
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fpattern[fpatterns].mode = mode;
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++fpatterns;
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}
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/*
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* Adds a directory include/exclude pattern to the internal array.
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*/
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static void
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add_dpattern(const char *pat, int mode)
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{
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/* Increase size if necessary */
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if (dpatterns == dpattern_sz) {
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dpattern_sz *= 2;
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dpattern = grep_realloc(dpattern, ++dpattern_sz *
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sizeof(struct epat));
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}
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dpattern[dpatterns].pat = grep_strdup(pat);
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dpattern[dpatterns].mode = mode;
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++dpatterns;
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}
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/*
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* Reads searching patterns from a file and adds them with add_pattern().
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*/
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static void
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read_patterns(const char *fn)
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{
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FILE *f;
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char *line;
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size_t len;
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ssize_t rlen;
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if ((f = fopen(fn, "r")) == NULL)
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err(2, "%s", fn);
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line = NULL;
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len = 0;
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while ((rlen = getline(&line, &len, f)) != -1)
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add_pattern(line, *line == '\n' ? 0 : (size_t)rlen);
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free(line);
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if (ferror(f))
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err(2, "%s", fn);
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fclose(f);
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}
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static inline const char *
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init_color(const char *d)
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{
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char *c;
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c = getenv("GREP_COLOR");
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return (c != NULL ? c : d);
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}
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int
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grep_main(int argc, char *argv[])
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{
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char **aargv, **eargv, *eopts;
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char *ep;
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unsigned long long l;
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unsigned int aargc, eargc, i, j;
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int c, lastc, needpattern, newarg, prevoptind;
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setlocale(LC_ALL, "");
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#ifndef WITHOUT_NLS
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catalog = catopen("grep", NL_CAT_LOCALE);
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#endif
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/* Check what is the program name of the binary. In this
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way we can have all the funcionalities in one binary
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without the need of scripting and using ugly hacks. */
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switch (__progname[0]) {
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case 'e':
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grepbehave = GREP_EXTENDED;
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break;
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case 'f':
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grepbehave = GREP_FIXED;
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break;
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case 'g':
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grepbehave = GREP_BASIC;
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break;
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case 'z':
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filebehave = FILE_GZIP;
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switch(__progname[1]) {
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case 'e':
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grepbehave = GREP_EXTENDED;
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break;
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case 'f':
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grepbehave = GREP_FIXED;
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break;
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case 'g':
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grepbehave = GREP_BASIC;
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break;
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}
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break;
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}
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lastc = '\0';
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newarg = 1;
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prevoptind = 1;
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needpattern = 1;
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eopts = getenv("GREP_OPTIONS");
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/* support for extra arguments in GREP_OPTIONS */
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eargc = 0;
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if (eopts != NULL) {
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char *str;
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/* make an estimation of how many extra arguments we have */
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for (j = 0; j < strlen(eopts); j++)
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if (eopts[j] == ' ')
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eargc++;
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eargv = (char **)grep_malloc(sizeof(char *) * (eargc + 1));
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eargc = 0;
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/* parse extra arguments */
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while ((str = strsep(&eopts, " ")) != NULL)
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eargv[eargc++] = grep_strdup(str);
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aargv = (char **)grep_calloc(eargc + argc + 1,
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sizeof(char *));
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aargv[0] = argv[0];
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for (i = 0; i < eargc; i++)
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aargv[i + 1] = eargv[i];
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for (j = 1; j < (unsigned int)argc; j++, i++)
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aargv[i + 1] = argv[j];
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aargc = eargc + argc;
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} else {
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aargv = argv;
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aargc = argc;
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}
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while (((c = getopt_long(aargc, aargv, optstr, long_options, NULL)) !=
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-1)) {
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switch (c) {
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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if (newarg || !isdigit(lastc))
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Aflag = 0;
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else if (Aflag > LLONG_MAX / 10) {
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errno = ERANGE;
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err(2, NULL);
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}
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Aflag = Bflag = (Aflag * 10) + (c - '0');
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break;
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case 'C':
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if (optarg == NULL) {
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Aflag = Bflag = 2;
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break;
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}
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/* FALLTHROUGH */
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case 'A':
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/* FALLTHROUGH */
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case 'B':
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errno = 0;
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l = strtoull(optarg, &ep, 10);
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if (((errno == ERANGE) && (l == ULLONG_MAX)) ||
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((errno == EINVAL) && (l == 0)))
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err(2, NULL);
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else if (ep[0] != '\0') {
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errno = EINVAL;
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err(2, NULL);
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}
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if (c == 'A')
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Aflag = l;
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else if (c == 'B')
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Bflag = l;
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else
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Aflag = Bflag = l;
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break;
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case 'a':
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binbehave = BINFILE_TEXT;
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break;
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case 'b':
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bflag = true;
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break;
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case 'c':
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cflag = true;
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break;
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case 'D':
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if (strcasecmp(optarg, "skip") == 0)
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devbehave = DEV_SKIP;
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else if (strcasecmp(optarg, "read") == 0)
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devbehave = DEV_READ;
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else
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errx(2, getstr(3), "--devices");
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break;
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case 'd':
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if (strcasecmp("recurse", optarg) == 0) {
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Hflag = true;
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dirbehave = DIR_RECURSE;
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} else if (strcasecmp("skip", optarg) == 0)
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dirbehave = DIR_SKIP;
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else if (strcasecmp("read", optarg) == 0)
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dirbehave = DIR_READ;
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else
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errx(2, getstr(3), "--directories");
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break;
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case 'E':
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grepbehave = GREP_EXTENDED;
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break;
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case 'e':
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add_pattern(optarg, strlen(optarg));
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needpattern = 0;
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break;
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case 'F':
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grepbehave = GREP_FIXED;
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break;
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case 'f':
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read_patterns(optarg);
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needpattern = 0;
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break;
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case 'G':
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grepbehave = GREP_BASIC;
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break;
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case 'H':
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Hflag = true;
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break;
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case 'h':
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Hflag = false;
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hflag = true;
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break;
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case 'I':
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binbehave = BINFILE_SKIP;
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break;
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case 'i':
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case 'y':
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iflag = true;
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cflags |= REG_ICASE;
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break;
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case 'J':
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filebehave = FILE_BZIP;
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break;
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case 'L':
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lflag = false;
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Lflag = true;
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break;
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case 'l':
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Lflag = false;
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lflag = true;
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break;
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case 'm':
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mflag = true;
|
|
errno = 0;
|
|
mcount = strtoull(optarg, &ep, 10);
|
|
if (((errno == ERANGE) && (mcount == ULLONG_MAX)) ||
|
|
((errno == EINVAL) && (mcount == 0)))
|
|
err(2, NULL);
|
|
else if (ep[0] != '\0') {
|
|
errno = EINVAL;
|
|
err(2, NULL);
|
|
}
|
|
break;
|
|
case 'n':
|
|
nflag = true;
|
|
break;
|
|
case 'O':
|
|
linkbehave = LINK_EXPLICIT;
|
|
break;
|
|
case 'o':
|
|
oflag = true;
|
|
break;
|
|
case 'p':
|
|
linkbehave = LINK_SKIP;
|
|
break;
|
|
case 'q':
|
|
qflag = true;
|
|
break;
|
|
case 'S':
|
|
linkbehave = LINK_READ;
|
|
break;
|
|
case 'R':
|
|
case 'r':
|
|
dirbehave = DIR_RECURSE;
|
|
Hflag = true;
|
|
break;
|
|
case 's':
|
|
sflag = true;
|
|
break;
|
|
case 'U':
|
|
binbehave = BINFILE_BIN;
|
|
break;
|
|
case 'u':
|
|
case MMAP_OPT:
|
|
/* noop, compatibility */
|
|
break;
|
|
case 'V':
|
|
printf(getstr(9), __progname, VERSION);
|
|
exit(0);
|
|
case 'v':
|
|
vflag = true;
|
|
break;
|
|
case 'w':
|
|
wflag = true;
|
|
break;
|
|
case 'x':
|
|
xflag = true;
|
|
break;
|
|
case 'Z':
|
|
nullflag = true;
|
|
break;
|
|
case 'z':
|
|
nulldataflag = true;
|
|
line_sep = '\0';
|
|
break;
|
|
case BIN_OPT:
|
|
if (strcasecmp("binary", optarg) == 0)
|
|
binbehave = BINFILE_BIN;
|
|
else if (strcasecmp("without-match", optarg) == 0)
|
|
binbehave = BINFILE_SKIP;
|
|
else if (strcasecmp("text", optarg) == 0)
|
|
binbehave = BINFILE_TEXT;
|
|
else
|
|
errx(2, getstr(3), "--binary-files");
|
|
break;
|
|
case COLOR_OPT:
|
|
color = NULL;
|
|
if (optarg == NULL || strcasecmp("auto", optarg) == 0 ||
|
|
strcasecmp("tty", optarg) == 0 ||
|
|
strcasecmp("if-tty", optarg) == 0) {
|
|
char *term;
|
|
|
|
term = getenv("TERM");
|
|
if (isatty(STDOUT_FILENO) && term != NULL &&
|
|
strcasecmp(term, "dumb") != 0)
|
|
color = init_color("01;31");
|
|
} else if (strcasecmp("always", optarg) == 0 ||
|
|
strcasecmp("yes", optarg) == 0 ||
|
|
strcasecmp("force", optarg) == 0) {
|
|
color = init_color("01;31");
|
|
} else if (strcasecmp("never", optarg) != 0 &&
|
|
strcasecmp("none", optarg) != 0 &&
|
|
strcasecmp("no", optarg) != 0)
|
|
errx(2, getstr(3), "--color");
|
|
break;
|
|
case DECOMPRESS_OPT:
|
|
filebehave = FILE_GZIP;
|
|
break;
|
|
case LABEL_OPT:
|
|
label = optarg;
|
|
break;
|
|
case LINEBUF_OPT:
|
|
lbflag = true;
|
|
break;
|
|
case R_INCLUDE_OPT:
|
|
finclude = true;
|
|
add_fpattern(optarg, INCL_PAT);
|
|
break;
|
|
case R_EXCLUDE_OPT:
|
|
fexclude = true;
|
|
add_fpattern(optarg, EXCL_PAT);
|
|
break;
|
|
case R_DINCLUDE_OPT:
|
|
dinclude = true;
|
|
add_dpattern(optarg, INCL_PAT);
|
|
break;
|
|
case R_DEXCLUDE_OPT:
|
|
dexclude = true;
|
|
add_dpattern(optarg, EXCL_PAT);
|
|
break;
|
|
case HELP_OPT:
|
|
default:
|
|
usage();
|
|
}
|
|
lastc = c;
|
|
newarg = optind != prevoptind;
|
|
prevoptind = optind;
|
|
}
|
|
aargc -= optind;
|
|
aargv += optind;
|
|
|
|
/* Fail if we don't have any pattern */
|
|
if (aargc == 0 && needpattern)
|
|
usage();
|
|
|
|
/* Process patterns from command line */
|
|
if (aargc != 0 && needpattern) {
|
|
add_pattern(*aargv, strlen(*aargv));
|
|
--aargc;
|
|
++aargv;
|
|
}
|
|
|
|
switch (grepbehave) {
|
|
case GREP_FIXED:
|
|
case GREP_BASIC:
|
|
break;
|
|
case GREP_EXTENDED:
|
|
cflags |= REG_EXTENDED;
|
|
break;
|
|
default:
|
|
/* NOTREACHED */
|
|
usage();
|
|
}
|
|
|
|
fg_pattern = grep_calloc(patterns, sizeof(*fg_pattern));
|
|
r_pattern = grep_calloc(patterns, sizeof(*r_pattern));
|
|
/*
|
|
* XXX: fgrepcomp() and fastcomp() are workarounds for regexec() performance.
|
|
* Optimizations should be done there.
|
|
*/
|
|
/* Check if cheating is allowed (always is for fgrep). */
|
|
if (grepbehave == GREP_FIXED) {
|
|
for (i = 0; i < patterns; ++i)
|
|
fgrepcomp(&fg_pattern[i], pattern[i]);
|
|
} else {
|
|
for (i = 0; i < patterns; ++i) {
|
|
if (fastcomp(&fg_pattern[i], pattern[i])) {
|
|
/* Fall back to full regex library */
|
|
c = regcomp(&r_pattern[i], pattern[i], cflags);
|
|
if (c != 0) {
|
|
regerror(c, &r_pattern[i], re_error,
|
|
RE_ERROR_BUF);
|
|
errx(2, "%s", re_error);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (lbflag)
|
|
setlinebuf(stdout);
|
|
|
|
if ((aargc == 0 || aargc == 1) && !Hflag)
|
|
hflag = true;
|
|
|
|
if (aargc == 0)
|
|
exit(!procfile("-"));
|
|
|
|
if (dirbehave == DIR_RECURSE)
|
|
c = grep_tree(aargv);
|
|
else
|
|
for (c = 0; aargc--; ++aargv) {
|
|
if ((finclude || fexclude) && !file_matching(*aargv))
|
|
continue;
|
|
c+= procfile(*aargv);
|
|
}
|
|
|
|
#ifndef WITHOUT_NLS
|
|
catclose(catalog);
|
|
#endif
|
|
|
|
/* Find out the correct return value according to the
|
|
results and the command line option. */
|
|
exit(c ? (notfound ? (qflag ? 0 : 2) : 0) : (notfound ? 2 : 1));
|
|
}
|