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05ad821531
fgrep/grep -F will error out at runtime if compiled with a regex(3) that does not define REG_NOSPEC or REG_LITERAL. glibc is one such regex(3) implementation, and as it turns out they don't support literal matching at all. Provide a primitive literal matcher for use with glibc and other implementations that don't support literal matching so that we don't completely lose fgrep/grep -F if compiled against libgnuregex on stable/10, stable/11, or other systems that we don't necessarily support. This is a wholly unoptimized implementation with no plans to optimize it as of now. This is due to both its use-case being primarily on unsupported systems in the near-distant future and that it's reinventing the wheel that we already have available as a feature of regex(3). Reviewed by: cem, emaste, ngie Approved by: emaste (mentor) MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D12056
163 lines
4.2 KiB
C
163 lines
4.2 KiB
C
/* $NetBSD: grep.h,v 1.5 2011/02/27 17:33:37 joerg Exp $ */
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/* $OpenBSD: grep.h,v 1.15 2010/04/05 03:03:55 tedu Exp $ */
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/* $FreeBSD$ */
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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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#include <bzlib.h>
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#include <limits.h>
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#include <regex.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <zlib.h>
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#ifndef WITHOUT_FASTMATCH
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#include "fastmatch.h"
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#endif
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#ifdef WITHOUT_NLS
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#define getstr(n) errstr[n]
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#else
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#include <nl_types.h>
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extern nl_catd catalog;
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#define getstr(n) catgets(catalog, 1, n, errstr[n])
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#endif
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extern const char *errstr[];
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#define VERSION "2.6.0-FreeBSD"
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#define GREP_FIXED 0
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#define GREP_BASIC 1
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#define GREP_EXTENDED 2
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#if !defined(REG_NOSPEC) && !defined(REG_LITERAL)
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#define WITH_INTERNAL_NOSPEC
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#endif
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#define BINFILE_BIN 0
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#define BINFILE_SKIP 1
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#define BINFILE_TEXT 2
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#define FILE_STDIO 0
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#define FILE_MMAP 1
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#define FILE_GZIP 2
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#define FILE_BZIP 3
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#define FILE_XZ 4
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#define FILE_LZMA 5
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#define DIR_READ 0
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#define DIR_SKIP 1
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#define DIR_RECURSE 2
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#define DEV_READ 0
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#define DEV_SKIP 1
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#define LINK_READ 0
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#define LINK_EXPLICIT 1
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#define LINK_SKIP 2
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#define EXCL_PAT 0
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#define INCL_PAT 1
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#define MAX_MATCHES 32
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struct file {
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int fd;
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bool binary;
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};
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struct str {
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off_t boff;
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off_t off;
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size_t len;
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char *dat;
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char *file;
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int line_no;
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};
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struct pat {
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char *pat;
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int len;
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};
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struct epat {
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char *pat;
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int mode;
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};
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/* Flags passed to regcomp() and regexec() */
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extern int cflags, eflags;
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/* Command line flags */
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extern bool Eflag, Fflag, Gflag, Hflag, Lflag,
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bflag, cflag, hflag, iflag, lflag, mflag, nflag, oflag,
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qflag, sflag, vflag, wflag, xflag;
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extern bool dexclude, dinclude, fexclude, finclude, lbflag, nullflag;
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extern long long Aflag, Bflag;
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extern long long mcount;
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extern long long mlimit;
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extern char fileeol;
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extern char *label;
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extern const char *color;
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extern int binbehave, devbehave, dirbehave, filebehave, grepbehave, linkbehave;
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extern bool file_err, matchall;
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extern unsigned int dpatterns, fpatterns, patterns;
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extern struct pat *pattern;
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extern struct epat *dpattern, *fpattern;
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extern regex_t *er_pattern, *r_pattern;
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#ifndef WITHOUT_FASTMATCH
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extern fastmatch_t *fg_pattern;
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#endif
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/* For regex errors */
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#define RE_ERROR_BUF 512
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extern char re_error[RE_ERROR_BUF + 1]; /* Seems big enough */
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/* util.c */
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bool file_matching(const char *fname);
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int procfile(const char *fn);
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int grep_tree(char **argv);
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void *grep_malloc(size_t size);
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void *grep_calloc(size_t nmemb, size_t size);
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void *grep_realloc(void *ptr, size_t size);
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char *grep_strdup(const char *str);
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void grep_printline(struct str *line, int sep);
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/* queue.c */
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bool enqueue(struct str *x);
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void printqueue(void);
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void clearqueue(void);
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/* file.c */
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void grep_close(struct file *f);
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struct file *grep_open(const char *path);
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char *grep_fgetln(struct file *f, size_t *len);
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