558 lines
13 KiB
C
558 lines
13 KiB
C
/* $NetBSD: grep.c,v 1.1.1.2 2004/01/02 15:00:29 cjep Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__RCSID("$NetBSD: grep.c,v 1.1.1.2 2004/01/02 15:00:29 cjep Exp $");
|
|
#endif /* not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <getopt.h>
|
|
#include <limits.h>
|
|
#include <regex.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "grep.h"
|
|
|
|
/*
|
|
* Upper bound of number of digits to represent an int in decimal
|
|
* 2^8n <= 10^3n. Allow a terminator.
|
|
*/
|
|
#define MAX_BUF_DIGITS (sizeof(int) * 3) + 1
|
|
|
|
/* Flags passed to regcomp() and regexec() */
|
|
int cflags = REG_BASIC;
|
|
int eflags = REG_STARTEND;
|
|
|
|
int matchall; /* shortcut */
|
|
int patterns, pattern_sz;
|
|
char **pattern;
|
|
regex_t *r_pattern;
|
|
|
|
/* For regex errors */
|
|
char re_error[RE_ERROR_BUF + 1];
|
|
|
|
/* Command-line flags */
|
|
int Aflag; /* -A x: print x lines trailing each match */
|
|
int Bflag; /* -B x: print x lines leading each match */
|
|
int Eflag; /* -E: interpret pattern as extended regexp */
|
|
int Fflag; /* -F: interpret pattern as list of fixed strings */
|
|
int Gflag; /* -G: interpret pattern as basic regexp */
|
|
int Hflag; /* -H: Always print filenames */
|
|
int Lflag; /* -L: only show names of files with no matches */
|
|
/*int Pflag; *//* -P: if -r, no symlinks are followed */
|
|
/*int Sflag; *//* -S: if -r, follow all symlinks */
|
|
int bflag; /* -b: show block numbers for each match */
|
|
int cflag; /* -c: only show a count of matching lines */
|
|
int hflag; /* -h: Never print filenames. -H overrides */
|
|
int lflag; /* -l: only show names of files with matches */
|
|
int mflag; /* -m: specify maximum line matches (per file) */
|
|
int nflag; /* -n: show line numbers in front of matching lines */
|
|
int oflag; /* -o: only print out matches */
|
|
int qflag; /* -q: quiet mode (don't output anything) */
|
|
int sflag; /* -s: silent mode (ignore errors) */
|
|
int vflag; /* -v: only show non-matching lines */
|
|
int wflag; /* -w: pattern must start and end on word boundaries */
|
|
int xflag; /* -x: pattern must match entire line */
|
|
|
|
int colours = 0; /* Attempt to use terminal colours */
|
|
const char *grep_colour = "01;32"; /* Default colour string, green */
|
|
char *uc;
|
|
|
|
/* Characters to print after filenames */
|
|
char fn_endchar = '\n';
|
|
char fn_colonchar = ':';
|
|
char fn_dashchar = '-';
|
|
char line_endchar = '\n'; /* End of line character */
|
|
|
|
int maxcount = 0; /* Maximum line matches per file */
|
|
int output_filenames = 0;
|
|
|
|
/* Argv[0] flags */
|
|
int zgrep; /* If we are invoked as zgrep */
|
|
|
|
int binbehave = BIN_FILE_BIN;
|
|
int dirbehave = GREP_READ;
|
|
int devbehave = GREP_READ;
|
|
/*int linkbehave = LINK_FOLLOW;*/
|
|
char *stdin_label;
|
|
|
|
enum {
|
|
BIN_OPT = CHAR_MAX + 1,
|
|
HELP_OPT,
|
|
LABEL_OPT,
|
|
MMAP_OPT,
|
|
LINK_OPT,
|
|
COLOUR_OPT
|
|
};
|
|
|
|
/* Housekeeping */
|
|
int first; /* flag whether or not this is our first match */
|
|
int tail; /* lines left to print */
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: %s %s %s\n",
|
|
getprogname(),
|
|
"[-[ABC] num] [-EFGHILVZabcdhilnoqrsvwxz]",
|
|
"[-D action] [-d action] [-e pattern] [-f file]");
|
|
exit(2);
|
|
}
|
|
|
|
static char *optstr = "0123456789A:B:C:D:EFGHILUVZabcd:e:f:hilm:noqrsuvwxyz";
|
|
|
|
struct option long_options[] =
|
|
{
|
|
{"binary-files", required_argument, NULL, BIN_OPT},
|
|
{"help", no_argument, NULL, HELP_OPT},
|
|
{"label", required_argument, NULL, LABEL_OPT},
|
|
{"mmap", no_argument, NULL, MMAP_OPT},
|
|
/* {"links", required_argument, NULL, LINK_OPT},*/
|
|
{"after-context", required_argument, NULL, 'A'},
|
|
{"before-context", required_argument, NULL, 'B'},
|
|
{"color", optional_argument, NULL, COLOUR_OPT},
|
|
{"colour", optional_argument, NULL, COLOUR_OPT},
|
|
{"context", optional_argument, NULL, 'C'},
|
|
{"devices", required_argument, NULL, 'D'},
|
|
{"extended-regexp", no_argument, NULL, 'E'},
|
|
{"fixed-strings", no_argument, NULL, 'F'},
|
|
{"fixed-regexp", no_argument, NULL, 'F'},
|
|
{"basic-regexp", no_argument, NULL, 'G'},
|
|
{"with-filename", no_argument, NULL, 'H'},
|
|
{"files-without-match", no_argument, NULL, 'L'},
|
|
{"binary", no_argument, NULL, 'U'},
|
|
{"version", no_argument, NULL, 'V'},
|
|
{"null", no_argument, NULL, 'Z'},
|
|
{"text", no_argument, NULL, 'a'},
|
|
{"byte-offset", no_argument, NULL, 'b'},
|
|
{"count", no_argument, NULL, 'c'},
|
|
{"directories", required_argument, NULL, 'd'},
|
|
{"regexp", required_argument, NULL, 'e'},
|
|
{"file", required_argument, NULL, 'f'},
|
|
{"no-filename", no_argument, NULL, 'h'},
|
|
{"ignore-case", no_argument, NULL, 'i'},
|
|
{"files-with-matches", 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'},
|
|
{"unix-byte-offsets", no_argument, NULL, 'u'},
|
|
{"invert-match", no_argument, NULL, 'v'},
|
|
{"word-regexp", no_argument, NULL, 'w'},
|
|
{"line-regexp", no_argument, NULL, 'x'},
|
|
{"null-data", no_argument, NULL, 'z'},
|
|
|
|
{NULL, no_argument, NULL, 0}
|
|
};
|
|
|
|
static void
|
|
add_pattern(char *pat, size_t len)
|
|
{
|
|
if (len == 0 || matchall) {
|
|
matchall = 1;
|
|
return;
|
|
}
|
|
if (patterns == pattern_sz) {
|
|
pattern_sz *= 2;
|
|
pattern = grep_realloc(pattern, ++pattern_sz * sizeof(*pattern));
|
|
}
|
|
if (pat[len - 1] == '\n')
|
|
--len;
|
|
pattern[patterns] = grep_malloc(len + 1);
|
|
strncpy(pattern[patterns], pat, len);
|
|
pattern[patterns][len] = '\0';
|
|
++patterns;
|
|
}
|
|
|
|
static void
|
|
read_patterns(char *fn)
|
|
{
|
|
FILE *f;
|
|
char *line;
|
|
size_t len;
|
|
int nl;
|
|
|
|
if ((f = fopen(fn, "r")) == NULL)
|
|
err(2, "%s", fn);
|
|
nl = 0;
|
|
while ((line = fgetln(f, &len)) != NULL) {
|
|
if (*line == '\n') {
|
|
++nl;
|
|
continue;
|
|
}
|
|
if (nl) {
|
|
matchall = 1;
|
|
break;
|
|
}
|
|
nl = 0;
|
|
add_pattern(line, len);
|
|
}
|
|
if (ferror(f))
|
|
err(2, "%s", fn);
|
|
fclose(f);
|
|
}
|
|
|
|
static int
|
|
check_context_arg(char const *str) {
|
|
char *ep;
|
|
long lval;
|
|
|
|
errno = 0;
|
|
lval = strtol(str, &ep, 10);
|
|
|
|
if (str[0] == '\0' || *ep != '\0')
|
|
errx(2, "Invalid context argument");
|
|
|
|
if ((errno == ERANGE && (lval == LONG_MAX || lval == LONG_MIN)) ||
|
|
(lval > INT_MAX || lval < INT_MIN))
|
|
errx(2, "Context argument out of range");
|
|
|
|
return lval;
|
|
|
|
}
|
|
|
|
static int
|
|
grep_getopt(int argc, char *const *argv)
|
|
{
|
|
int c, ptr;
|
|
char buffer[MAX_BUF_DIGITS];
|
|
|
|
ptr = 0;
|
|
while (c = getopt_long(argc, argv, optstr, long_options,
|
|
(int *)NULL), '0' <= c &&
|
|
c <= '9' && ptr < MAX_BUF_DIGITS) {
|
|
|
|
/* Avoid leading zeros */
|
|
if (ptr != 0 || (ptr == 0 && c != '0'))
|
|
buffer[ptr++] = c;
|
|
}
|
|
|
|
if (ptr >= MAX_BUF_DIGITS)
|
|
errx(2, "Context argument out of range");
|
|
|
|
if (ptr) {
|
|
buffer[ptr] = '\0'; /* We now have a string of digits */
|
|
Aflag = Bflag = check_context_arg(buffer);
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
const char *progname;
|
|
int c, i;
|
|
struct stat sb;
|
|
|
|
stdin_label = "(standard input)";
|
|
|
|
progname = getprogname();
|
|
switch (progname[0]) {
|
|
case 'e':
|
|
Eflag++;
|
|
break;
|
|
case 'f':
|
|
Fflag++;
|
|
break;
|
|
case 'g':
|
|
Gflag++;
|
|
break;
|
|
case 'z':
|
|
zgrep++;
|
|
switch (progname[1]) {
|
|
case 'e':
|
|
Eflag++;
|
|
break;
|
|
case 'f':
|
|
Fflag++;
|
|
break;
|
|
case 'g':
|
|
Gflag++;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
while ((c = grep_getopt(argc, argv)) != -1) {
|
|
|
|
switch (c) {
|
|
|
|
case 'A':
|
|
Aflag = check_context_arg(optarg);
|
|
break;
|
|
case 'B':
|
|
Bflag = check_context_arg(optarg);
|
|
break;
|
|
case 'C':
|
|
if (optarg == NULL)
|
|
Aflag = Bflag = 2;
|
|
else
|
|
Aflag = Bflag = check_context_arg(optarg);
|
|
break;
|
|
case 'D':
|
|
if (strcmp("read", optarg) == 0)
|
|
devbehave = GREP_READ;
|
|
else if (strcmp("skip", optarg) == 0)
|
|
devbehave = GREP_SKIP;
|
|
else {
|
|
errx(2, "Unknown device option");
|
|
}
|
|
break;
|
|
|
|
case 'E':
|
|
Fflag = Gflag = 0;
|
|
Eflag++;
|
|
break;
|
|
case 'F':
|
|
Eflag = Gflag = 0;
|
|
Fflag++;
|
|
break;
|
|
case 'G':
|
|
Eflag = Fflag = 0;
|
|
Gflag++;
|
|
break;
|
|
case 'H':
|
|
Hflag = 1;
|
|
break;
|
|
case 'I':
|
|
binbehave = BIN_FILE_SKIP;
|
|
break;
|
|
case 'L':
|
|
lflag = 0;
|
|
Lflag = qflag = 1;
|
|
break;
|
|
/* case 'P':
|
|
linkbehave = LINK_SKIP;
|
|
break;
|
|
case 'S':
|
|
linkbehave = LINK_FOLLOW;
|
|
break;*/
|
|
case 'R':
|
|
case 'r':
|
|
dirbehave = GREP_RECURSE;
|
|
break;
|
|
case 'U':
|
|
case 'u':
|
|
/* these are here for compatability */
|
|
break;
|
|
case 'V':
|
|
fprintf(stdout, "grep version %s\n", VERSION);
|
|
exit(0);
|
|
break;
|
|
case 'Z':
|
|
fn_colonchar = fn_endchar = fn_dashchar = 0;
|
|
break;
|
|
case 'a':
|
|
binbehave = BIN_FILE_TEXT;
|
|
break;
|
|
case 'b':
|
|
bflag = 1;
|
|
break;
|
|
case 'c':
|
|
cflag = 1;
|
|
break;
|
|
case 'd':
|
|
if (strcmp("read", optarg) == 0)
|
|
dirbehave = GREP_READ;
|
|
else if (strcmp("skip", optarg) == 0)
|
|
dirbehave = GREP_SKIP;
|
|
else if (strcmp("recurse", optarg) == 0)
|
|
dirbehave = GREP_RECURSE;
|
|
else {
|
|
errx(2, "Unknown directory option\n");
|
|
}
|
|
break;
|
|
|
|
case 'e':
|
|
add_pattern(optarg, strlen(optarg));
|
|
break;
|
|
case 'f':
|
|
read_patterns(optarg);
|
|
break;
|
|
case 'h':
|
|
hflag = 1;
|
|
break;
|
|
case 'i':
|
|
case 'y':
|
|
cflags |= REG_ICASE;
|
|
break;
|
|
case 'l':
|
|
Lflag = 0;
|
|
lflag = qflag = 1;
|
|
break;
|
|
case 'm':
|
|
mflag = 1;
|
|
maxcount = strtol(optarg, (char **)NULL, 10);
|
|
break;
|
|
case 'n':
|
|
nflag = 1;
|
|
break;
|
|
case 'o':
|
|
oflag = 1;
|
|
break;
|
|
case 'q':
|
|
qflag = 1;
|
|
break;
|
|
case 's':
|
|
sflag = 1;
|
|
break;
|
|
case 'v':
|
|
vflag = 1;
|
|
break;
|
|
case 'w':
|
|
wflag = 1;
|
|
break;
|
|
case 'x':
|
|
xflag = 1;
|
|
break;
|
|
case 'z':
|
|
line_endchar = 0;
|
|
break;
|
|
case BIN_OPT:
|
|
if (strcmp("binary", optarg) == 0)
|
|
binbehave = BIN_FILE_BIN;
|
|
else if (strcmp("without-match", optarg) == 0)
|
|
binbehave = BIN_FILE_SKIP;
|
|
else if (strcmp("text", optarg) == 0)
|
|
binbehave = BIN_FILE_TEXT;
|
|
else {
|
|
errx(2, "Unknown binary-files option\n");
|
|
}
|
|
break;
|
|
|
|
case COLOUR_OPT:
|
|
if (optarg == NULL || strcmp("auto", optarg) == 0 ||
|
|
strcmp("tty", optarg) == 0 ||
|
|
strcmp("if-tty", optarg) == 0) {
|
|
|
|
/* Check that stdout is a terminal */
|
|
if (isatty(STDOUT_FILENO) &&
|
|
getenv("TERM") &&
|
|
strcmp(getenv("TERM"), "dumb") != 0)
|
|
colours = 1;
|
|
else
|
|
colours = 0;
|
|
|
|
} else if (strcmp("always", optarg) == 0 ||
|
|
strcmp("yes", optarg) == 0 ||
|
|
strcmp("force", optarg) == 0)
|
|
colours = 1;
|
|
else if (strcmp("never", optarg) == 0 ||
|
|
strcmp("no", optarg) == 0 ||
|
|
strcmp("none", optarg) == 0)
|
|
colours = 0;
|
|
else
|
|
errx(2, "Unknown color option\n");
|
|
|
|
uc = getenv("GREP_COLOR");
|
|
if (colours == 1 && uc != NULL && *uc != '\0')
|
|
grep_colour = uc;
|
|
break;
|
|
case LABEL_OPT:
|
|
stdin_label = optarg;
|
|
break;
|
|
case MMAP_OPT:
|
|
break;
|
|
/*
|
|
* case LINK_OPT:
|
|
* if (strcmp("explicit", optarg) == 0)
|
|
* linkbehave = LINK_EXPLICIT;
|
|
* else if (strcmp("follow", optarg) == 0)
|
|
* linkbehave = LINK_FOLLOW;
|
|
* else if (strcmp("skip", optarg) == 0)
|
|
* linkbehave = LINK_SKIP;
|
|
* else {
|
|
* errx(2, "Unknown links option\n");
|
|
* }
|
|
* break;
|
|
*/
|
|
|
|
case HELP_OPT:
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc == 0 && patterns == 0)
|
|
usage();
|
|
if (patterns == 0) {
|
|
add_pattern(*argv, strlen(*argv));
|
|
--argc;
|
|
++argv;
|
|
}
|
|
|
|
if (Eflag)
|
|
cflags |= REG_EXTENDED;
|
|
else if (Fflag)
|
|
cflags |= REG_NOSPEC;
|
|
r_pattern = grep_malloc(patterns * sizeof(*r_pattern));
|
|
for (i = 0; i < patterns; ++i) {
|
|
if ((c = regcomp(&r_pattern[i], pattern[i], cflags))) {
|
|
regerror(c, &r_pattern[i], re_error, RE_ERROR_BUF);
|
|
errx(2, "%s", re_error);
|
|
}
|
|
}
|
|
|
|
if ((argc > 1 && !hflag) || Hflag)
|
|
output_filenames = 1;
|
|
|
|
if (argc == 1 && !hflag && dirbehave == GREP_RECURSE)
|
|
if (!stat(*argv, &sb) && (sb.st_mode & S_IFMT) == S_IFDIR)
|
|
output_filenames = 1;
|
|
|
|
if (argc == 0)
|
|
exit(!procfile(NULL));
|
|
|
|
if (dirbehave == GREP_RECURSE)
|
|
c = grep_tree(argv);
|
|
else
|
|
for (c = 0; argc--; ++argv)
|
|
c += procfile(*argv);
|
|
|
|
exit(!c);
|
|
}
|