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grep.c
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/* grep.c - main driver file for grep.
Copyright (C) 1992, 1997, 1998 Free Software Foundation, Inc.
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, 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. */
/* Written July 1992 by Mike Haertel. */
/**** I added all things in Makefile in order to run cfe *******/
#define HAVE_CONFIG_H 1
#define LOCALEDIR "/nfs/spectre/u4/jin/research/experiments/grep/docs/grep_2.2/lib/locale"
#define _LARGEFILE_SOURCE 1
#define _FILE_OFFSET_BITS 32 /* In order to let cfe work, change original 64 to 32*/
/* Reason: Please see /usr/include/sys/types.h */
/*typedef int off_t; */ /** since cfe can't recognize off_t defined in system file as int*/
/* so I change all off_t to Off_t and define type of Off_t */
/****** end for cfe ***************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#define flag_config 1
#endif
#include <sys/types.h>
#define flag_typesh 1
#include <sys/stat.h>
#if defined(HAVE_MMAP)
# include <sys/mman.h>
#endif
#if defined(HAVE_SETRLIMIT)
# include <sys/time.h>
# include <sys/resource.h>
#endif
#include <stdio.h>
/*******IMPORTANT CHANGE for let stderr redirect to a file *******/
#undef stderr
#define stderr stdout
/******* FINISH IMPORTANT CHANGE *********/
#include "system.h"
#include "getopt.h"
#include "getpagesize.h"
#include "grep.h"
#undef MAX
#define MAX(A,B) ((A) > (B) ? (A) : (B))
/* if non-zero, display usage information and exit */
static int show_help;
/* If non-zero, print the version on standard output and exit. */
static int show_version;
/* Long options equivalences. */
static struct option long_options[] =
{
{"after-context", required_argument, NULL, 'A'},
{"basic-regexp", no_argument, NULL, 'G'},
{"before-context", required_argument, NULL, 'B'},
{"byte-offset", no_argument, NULL, 'b'},
{"context", no_argument, NULL, 'C'},
{"count", no_argument, NULL, 'c'},
{"extended-regexp", no_argument, NULL, 'E'},
{"file", required_argument, NULL, 'f'},
{"files-with-matches", no_argument, NULL, 'l'},
{"files-without-match", no_argument, NULL, 'L'},
{"fixed-regexp", no_argument, NULL, 'F'},
{"fixed-strings", no_argument, NULL, 'F'},
{"help", no_argument, &show_help, 1},
{"ignore-case", no_argument, NULL, 'i'},
{"line-number", no_argument, NULL, 'n'},
{"line-regexp", no_argument, NULL, 'x'},
{"no-filename", no_argument, NULL, 'h'},
{"no-messages", no_argument, NULL, 's'},
{"quiet", no_argument, NULL, 'q'},
{"regexp", required_argument, NULL, 'e'},
{"revert-match", no_argument, NULL, 'v'},
{"silent", no_argument, NULL, 'q'},
#if O_BINARY
{"binary", no_argument, NULL, 'U'},
{"unix-byte-offsets", no_argument, NULL, 'u'},
#endif
{"version", no_argument, NULL, 'V'},
{"with-filename", no_argument, NULL, 'H'},
{"word-regexp", no_argument, NULL, 'w'},
{0, 0, 0, 0}
};
/* Define flags declared in grep.h. */
char *matcher;
int match_icase;
int match_words;
int match_lines;
/* For error messages. */
static char *prog;
static char *filename;
static int errseen;
static int ck_atoi PARAMS((char const *, int *));
static void usage PARAMS((int));
static void error PARAMS((const char *, int));
static int setmatcher PARAMS((char *));
static void reset PARAMS((int));
static int fillbuf PARAMS((size_t));
static int grepbuf PARAMS((char *, char *));
static void prtext PARAMS((char *, char *, int *));
static void prpending PARAMS((char *));
static void prline PARAMS((char *, char *, int));
static void nlscan PARAMS((char *));
static int grep PARAMS((int));
/* Functions we'll use to search. */
static void (*compile) PARAMS((char *, size_t));
static char *(*execute) PARAMS((char *, size_t, char **));
/* Print a message and possibly an error string. Remember
that something awful happened. */
static void
error(mesg, errnum)
const char *mesg;
int errnum;
{
if (errnum)
fprintf(stderr, "%s: %s: %s\n", prog, mesg, strerror(errnum));
else
fprintf(stderr, "%s: %s\n", prog, mesg);
errseen = 1;
}
/* Like error(), but die horribly after printing. */
void
fatal(mesg, errnum)
const char *mesg;
int errnum;
{
error(mesg, errnum);
exit(2);
}
/* Interface to handle errors and fix library lossage. */
char *
xmalloc(size)
size_t size;
{
char *result;
result = malloc(size);
if (size && !result)
fatal(_("memory exhausted"), 0);
return result;
}
/* Interface to handle errors and fix some library lossage. */
char *
xrealloc(ptr, size)
char *ptr;
size_t size;
{
char *result;
if (ptr)
result = realloc(ptr, size);
else
result = malloc(size);
if (size && !result)
fatal(_("memory exhausted"), 0);
return result;
}
/* Convert STR to a positive integer, storing the result in *OUT.
If STR is not a valid integer, return -1 (otherwise 0). */
static int
ck_atoi (str, out)
char const *str;
int *out;
{
char const *p;
for (p = str; *p; p++)
if (*p < '0' || *p > '9')
return -1;
*out = atoi (optarg);
return 0;
}
/* Hairy buffering mechanism for grep. The intent is to keep
all reads aligned on a page boundary and multiples of the
page size. */
static char *buffer; /* Base of buffer. */
static size_t bufsalloc; /* Allocated size of buffer save region. */
static size_t bufalloc; /* Total buffer size. */
static int bufdesc; /* File descriptor. */
static char *bufbeg; /* Beginning of user-visible stuff. */
static char *buflim; /* Limit of user-visible stuff. */
#if defined(HAVE_MMAP)
static int bufmapped; /* True for ordinary files. */
static struct stat bufstat; /* From fstat(). */
static off_t bufoffset; /* What read() normally remembers. */
#endif
/* Reset the buffer for a new file. Initialize
on the first time through. */
static void
reset(fd)
int fd;
{
static int initialized;
if (!initialized)
{
initialized = 1;
#ifndef BUFSALLOC
bufsalloc = MAX(8192, getpagesize());
#else
bufsalloc = BUFSALLOC;
#endif
bufalloc = 5 * bufsalloc;
/* The 1 byte of overflow is a kludge for dfaexec(), which
inserts a sentinel newline at the end of the buffer
being searched. There's gotta be a better way... */
buffer = valloc(bufalloc + 1);
if (!buffer)
fatal(_("memory exhausted"), 0);
bufbeg = buffer;
buflim = buffer;
}
bufdesc = fd;
#if defined(HAVE_MMAP)
if (fstat(fd, &bufstat) < 0 || !S_ISREG(bufstat.st_mode))
bufmapped = 0;
else
{
bufmapped = 1;
bufoffset = lseek(fd, 0, 1);
}
#endif
}
/* Read new stuff into the buffer, saving the specified
amount of old stuff. When we're done, 'bufbeg' points
to the beginning of the buffer contents, and 'buflim'
points just after the end. Return count of new stuff. */
static int
fillbuf(save)
size_t save;
{
char *nbuffer, *dp, *sp;
int cc;
#if defined(HAVE_MMAP)
caddr_t maddr;
#endif
static int pagesize;
if (pagesize == 0 && (pagesize = getpagesize()) == 0)
abort();
if (save > bufsalloc)
{
while (save > bufsalloc)
bufsalloc *= 2;
bufalloc = 5 * bufsalloc;
nbuffer = valloc(bufalloc + 1);
if (!nbuffer)
fatal(_("memory exhausted"), 0);
}
else
nbuffer = buffer;
sp = buflim - save;
dp = nbuffer + bufsalloc - save;
bufbeg = dp;
while (save--)
*dp++ = *sp++;
/* We may have allocated a new, larger buffer. Since
there is no portable vfree(), we just have to forget
about the old one. Sorry. */
buffer = nbuffer;
#if defined(HAVE_MMAP)
if (bufmapped && bufoffset % pagesize == 0
&& bufstat.st_size - bufoffset >= bufalloc - bufsalloc)
{
maddr = buffer + bufsalloc;
maddr = mmap(maddr, bufalloc - bufsalloc, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_FIXED, bufdesc, bufoffset);
if (maddr == (caddr_t) -1)
{
/* This used to issue a warning, but on some hosts
(e.g. Solaris 2.5) mmap can fail merely because some
other process has an advisory erad lock on the file.
There's no point alarming the use about this misfeature */
#if 0
fprintf(stderr, _("%s: warning: %s: %s\n"), prog, filename,
strerror(errno));
#endif
goto tryread;
}
#if 0
/* You might thing this (or MADV_WILLNEED) would help,
but it doesn't, at least not on a Sun running 4.1.
In fact, it actually slows us down about 30%! */
madvise(maddr, bufalloc - bufsalloc, MADV_SEQUENTIAL);
#endif
cc = bufalloc - bufsalloc;
bufoffset += cc;
}
else
{
tryread:
/* We come here when we're not going to use mmap() any more.
Note that we need to synchronize the file offset the
first time through. */
if (bufmapped)
{
bufmapped = 0;
lseek(bufdesc, bufoffset, 0);
}
cc = read(bufdesc, buffer + bufsalloc, bufalloc - bufsalloc);
}
#else
cc = read(bufdesc, buffer + bufsalloc, bufalloc - bufsalloc);
#endif
#if O_BINARY
if (O_BINARY && cc > 0)
cc = undossify_input(buffer + bufsalloc, cc);
#endif
if (cc > 0)
buflim = buffer + bufsalloc + cc;
else
buflim = buffer + bufsalloc;
return cc;
}
/* Flags controlling the style of output. */
static int out_quiet; /* Suppress all normal output. */
static int out_invert; /* Print nonmatching stuff. */
static int out_file; /* Print filenames. */
static int out_line; /* Print line numbers. */
static int out_byte; /* Print byte offsets. */
static int out_before; /* Lines of leading context. */
static int out_after; /* Lines of trailing context. */
/* Internal variables to keep track of byte count, context, etc. */
static size_t totalcc; /* Total character count before bufbeg. */
static char *lastnl; /* Pointer after last newline counted. */
static char *lastout; /* Pointer after last character output;
NULL if no character has been output
or if it's conceptually before bufbeg. */
static size_t totalnl; /* Total newline count before lastnl. */
static int pending; /* Pending lines of output. */
static int done_on_match; /* Stop scanning file on first match */
#if O_BINARY
# include "dosbuf.c"
#endif
static void
nlscan(lim)
char *lim;
{
char *beg;
for (beg = lastnl; beg < lim; ++beg)
if (*beg == '\n')
++totalnl;
lastnl = beg;
}
static void
prline(beg, lim, sep)
char *beg;
char *lim;
int sep;
{
if (out_file)
printf("%s%c", filename, sep);
if (out_line)
{
nlscan(beg);
printf("%u%c", (unsigned int)++totalnl, sep);
lastnl = lim;
}
if (out_byte)
#if O_BINARY
printf("%lu%c",
(unsigned long int) dossified_pos(totalcc + (beg - bufbeg)), sep);
#else
printf("%lu%c", (unsigned long int) (totalcc + (beg - bufbeg)), sep);
#endif
fwrite(beg, 1, lim - beg, stdout);
if (ferror(stdout))
error(_("writing output"), errno);
lastout = lim;
}
/* Print pending lines of trailing context prior to LIM. */
static void
prpending(lim)
char *lim;
{
char *nl;
if (!lastout)
lastout = bufbeg;
while (pending > 0 && lastout < lim)
{
--pending;
if ((nl = memchr(lastout, '\n', lim - lastout)) != 0)
++nl;
else
nl = lim;
prline(lastout, nl, '-');
}
}
/* Print the lines between BEG and LIM. Deal with context crap.
If NLINESP is non-null, store a count of lines between BEG and LIM. */
static void
prtext(beg, lim, nlinesp)
char *beg;
char *lim;
int *nlinesp;
{
static int used; /* avoid printing "--" before any output */
char *bp, *p, *nl;
int i, n;
if (!out_quiet && pending > 0)
prpending(beg);
p = beg;
if (!out_quiet)
{
/* Deal with leading context crap. */
bp = lastout ? lastout : bufbeg;
for (i = 0; i < out_before; ++i)
if (p > bp)
do
--p;
while (p > bp && p[-1] != '\n');
/* We only print the "--" separator if our output is
discontiguous from the last output in the file. */
if ((out_before || out_after) && used && p != lastout)
puts("--");
while (p < beg)
{
nl = memchr(p, '\n', beg - p);
prline(p, nl + 1, '-');
p = nl + 1;
}
}
if (nlinesp)
{
/* Caller wants a line count. */
for (n = 0; p < lim; ++n)
{
if ((nl = memchr(p, '\n', lim - p)) != 0)
++nl;
else
nl = lim;
if (!out_quiet)
prline(p, nl, ':');
p = nl;
}
*nlinesp = n;
}
else
if (!out_quiet)
prline(beg, lim, ':');
pending = out_after;
used = 1;
}
/* Scan the specified portion of the buffer, matching lines (or
between matching lines if OUT_INVERT is true). Return a count of
lines printed. */
static int
grepbuf(beg, lim)
char *beg;
char *lim;
{
int nlines, n;
register char *p, *b;
char *endp;
nlines = 0;
p = beg;
while ((b = (*execute)(p, lim - p, &endp)) != 0)
{
/* Avoid matching the empty line at the end of the buffer. */
if (b == lim && ((b > beg && b[-1] == '\n') || b == beg))
break;
if (!out_invert)
{
prtext(b, endp, (int *) 0);
nlines += 1;
if (done_on_match)
return nlines;
}
else if (p < b)
{
prtext(p, b, &n);
nlines += n;
}
p = endp;
}
if (out_invert && p < lim)
{
prtext(p, lim, &n);
nlines += n;
}
return nlines;
}
/* Search a given file. Return a count of lines printed. */
static int
grep(fd)
int fd;
{
int nlines, i;
size_t residue, save;
char *beg, *lim;
reset(fd);
totalcc = 0;
lastout = 0;
totalnl = 0;
pending = 0;
nlines = 0;
residue = 0;
save = 0;
for (;;)
{
if (fillbuf(save) < 0)
{
error(filename, errno);
return nlines;
}
lastnl = bufbeg;
if (lastout)
lastout = bufbeg;
if (buflim - bufbeg == save)
break;
beg = bufbeg + save - residue;
for (lim = buflim; lim > beg && lim[-1] != '\n'; --lim)
;
residue = buflim - lim;
if (beg < lim)
{
nlines += grepbuf(beg, lim);
if (pending)
prpending(lim);
if (nlines && done_on_match && !out_invert)
return nlines;
}
i = 0;
beg = lim;
while (i < out_before && beg > bufbeg && beg != lastout)
{
++i;
do
--beg;
while (beg > bufbeg && beg[-1] != '\n');
}
if (beg != lastout)
lastout = 0;
save = residue + lim - beg;
totalcc += buflim - bufbeg - save;
if (out_line)
nlscan(beg);
}
if (residue)
{
nlines += grepbuf(bufbeg + save - residue, buflim);
if (pending)
prpending(buflim);
}
return nlines;
}
static void
usage(status)
int status;
{
if (status != 0)
{
fprintf (stderr, _("Usage: %s [OPTION]... PATTERN [FILE]...\n"), prog);
fprintf (stderr, _("Try `%s --help' for more information.\n"), prog);
}
else
{
printf (_("Usage: %s [OPTION]... PATTERN [FILE] ...\n"), prog);
printf (_("\
Search for PATTERN in each FILE or standard input.\n\
\n\
Regexp selection and interpretation:\n\
-E, --extended-regexp PATTERN is an extended regular expression\n\
-F, --fixed-regexp PATTERN is a fixed string separated by newlines\n\
-G, --basic-regexp PATTERN is a basic regular expression\n\
-e, --regexp=PATTERN use PATTERN as a regular expression\n\
-f, --file=FILE obtain PATTERN from FILE\n\
-i, --ignore-case ignore case distinctions\n\
-w, --word-regexp force PATTERN to match only whole words\n\
-x, --line-regexp force PATTERN to match only whole lines\n"));
printf (_("\
\n\
Miscellaneous:\n\
-s, --no-messages suppress error messages\n\
-v, --revert-match select non-matching lines\n\
-V, --version print version information and exit\n\
--help display this help and exit\n"));
printf (_("\
\n\
Output control:\n\
-b, --byte-offset print the byte offset with output lines\n\
-n, --line-number print line number with output lines\n\
-H, --with-filename print the filename for each match\n\
-h, --no-filename suppress the prefixing filename on output\n\
-q, --quiet, --silent suppress all normal output\n\
-L, --files-without-match only print FILE names containing no match\n\
-l, --files-with-matches only print FILE names containing matches\n\
-c, --count only print a count of matching lines per FILE\n"));
printf (_("\
\n\
Context control:\n\
-B, --before-context=NUM print NUM lines of leading context\n\
-A, --after-context=NUM print NUM lines of trailing context\n\
-NUM same as both -B NUM and -A NUM\n\
-C, --context same as -2\n\
-U, --binary do not strip CR characters at EOL (MSDOS)\n\
-u, --unix-byte-offsets report offsets as if CRs were not there (MSDOS)\n\
\n\
If no -[GEF], then `egrep' assumes -E, `fgrep' -F, else -G.\n\
With no FILE, or when FILE is -, read standard input. If less than\n\
two FILEs given, assume -h. Exit with 0 if matches, with 1 if none.\n\
Exit with 2 if syntax errors or system errors.\n"));
printf (_("\nReport bugs to <[email protected]>.\n"));
}
exit(status);
}
/* Go through the matchers vector and look for the specified matcher.
If we find it, install it in compile and execute, and return 1. */
static int
setmatcher(name)
char *name;
{
int i;
#ifdef HAVE_SETRLIMIT
struct rlimit rlim;
#endif
for (i = 0; matchers[i].name; ++i)
if (strcmp(name, matchers[i].name) == 0)
{
compile = matchers[i].compile;
execute = matchers[i].execute;
#if HAVE_SETRLIMIT && defined(RLIMIT_STACK)
/* I think every platform needs to do this, so that regex.c
doesn't oveflow the stack. The default value of
`re_max_failures' is too large for some platforms: it needs
more than 3MB-large stack.
The test for HAVE_SETRLIMIT should go into `configure'. */
if (!getrlimit (RLIMIT_STACK, &rlim))
{
long newlim;
extern long int re_max_failures; /* from regex.c */
/* Approximate the amount regex.c needs, plus some more. */
newlim = re_max_failures * 2 * 20 * sizeof (char *);
if (newlim > rlim.rlim_max)
{
newlim = rlim.rlim_max;
re_max_failures = newlim / (2 * 20 * sizeof (char *));
}
if (rlim.rlim_cur < newlim)
rlim.rlim_cur = newlim;
setrlimit (RLIMIT_STACK, &rlim);
}
#endif
return 1;
}
return 0;
}
int
main(argc, argv)
int argc;
char *argv[];
{
char *keys;
size_t keycc, oldcc, keyalloc;
int count_matches, no_filenames, list_files, suppress_errors;
int with_filenames;
int opt, cc, desc, count, status;
FILE *fp;
extern char *optarg;
extern int optind;
/* add this line for diff between *.c and *.int.c */
argv[0] = "target1";
prog = argv[0];
if (prog && strrchr(prog, '/'))
prog = strrchr(prog, '/') + 1;
#if defined(__MSDOS__) || defined(_WIN32)
/* DOS and MS-Windows use backslashes as directory separators, and usually
have an .exe suffix. They also have case-insensitive filesystems. */
if (prog)
{
char *p = prog;
char *bslash = strrchr(argv[0], '\\');
if (bslash && bslash >= prog) /* for mixed forward/backslash case */
prog = bslash + 1;
else if (prog == argv[0]
&& argv[0][0] && argv[0][1] == ':') /* "c:progname" */
prog = argv[0] + 2;
/* Collapse the letter-case, so `strcmp' could be used hence. */
for ( ; *p; p++)
if (*p >= 'A' && *p <= 'Z')
*p += 'a' - 'A';
/* Remove the .exe extension, if any. */
if ((p = strrchr(prog, '.')) && strcmp(p, ".exe") == 0)
*p = '\0';
}
#endif
keys = NULL;
keycc = 0;
count_matches = 0;
no_filenames = 0;
with_filenames = 0;
list_files = 0;
suppress_errors = 0;
matcher = NULL;
/* Internationalization. */
#if HAVE_SETLOCALE
setlocale (LC_ALL, "");
#endif
#if ENABLE_NLS
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
#endif
while ((opt = getopt_long(argc, argv,
#if O_BINARY
"0123456789A:B:CEFGHVX:bce:f:hiLlnqsvwxyUu",
#else
"0123456789A:B:CEFGHVX:bce:f:hiLlnqsvwxy",
#endif
long_options, NULL)) != EOF)
switch (opt)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
out_before = 10 * out_before + opt - '0';
out_after = 10 * out_after + opt - '0';
break;
case 'A':
if (optarg)
{
if (ck_atoi (optarg, &out_after))
fatal (_("invalid context length argument"), 0);
}
break;
case 'B':
if (optarg)
{
if (ck_atoi (optarg, &out_before))
fatal (_("invalid context length argument"), 0);
}
break;
case 'C':
out_before = out_after = 2;
break;
case 'E':
if (matcher && strcmp(matcher, "posix-egrep") != 0)
fatal(_("you may specify only one of -E, -F, or -G"), 0);
matcher = "posix-egrep";
break;
case 'F':
if (matcher && strcmp(matcher, "fgrep") != 0)
fatal(_("you may specify only one of -E, -F, or -G"), 0);;
matcher = "fgrep";
break;
case 'G':
if (matcher && strcmp(matcher, "grep") != 0)
fatal(_("you may specify only one of -E, -F, or -G"), 0);
matcher = "grep";
break;
case 'H':
with_filenames = 1;
break;
#if O_BINARY
case 'U':
dos_use_file_type = DOS_BINARY;
break;
case 'u':
dos_report_unix_offset = 1;
break;
#endif
case 'V':
show_version = 1;
break;
case 'X':
if (matcher)
fatal(_("matcher already specified"), 0);
matcher = optarg;
break;
case 'b':
out_byte = 1;
break;
case 'c':
out_quiet = 1;
count_matches = 1;
break;
case 'e':
cc = strlen(optarg);
keys = xrealloc(keys, keycc + cc + 1);
strcpy(&keys[keycc], optarg);
keycc += cc;
keys[keycc++] = '\n';
break;
case 'f':
fp = strcmp(optarg, "-") != 0 ? fopen(optarg, "r") : stdin;
if (!fp)
fatal(optarg, errno);
for (keyalloc = 1; keyalloc <= keycc + 1; keyalloc *= 2)
;
keys = xrealloc(keys, keyalloc);
oldcc = keycc;
while (!feof(fp)
&& (cc = fread(keys + keycc, 1, keyalloc - 1 - keycc, fp)) > 0)
{
keycc += cc;
if (keycc == keyalloc - 1)
keys = xrealloc(keys, keyalloc *= 2);
}
if (fp != stdin)
fclose(fp);
/* Append final newline if file ended in non-newline. */
if (oldcc != keycc && keys[keycc - 1] != '\n')
keys[keycc++] = '\n';
break;
case 'h':
no_filenames = 1;
break;
case 'i':
case 'y': /* For old-timers . . . */
match_icase = 1;
break;
case 'L':
/* Like -l, except list files that don't contain matches.
Inspired by the same option in Hume's gre. */
out_quiet = 1;
list_files = -1;
done_on_match = 1;
break;
case 'l':
out_quiet = 1;
list_files = 1;
done_on_match = 1;
break;
case 'n':
out_line = 1;
break;
case 'q':
done_on_match = 1;
out_quiet = 1;
break;
case 's':
suppress_errors = 1;
break;
case 'v':
out_invert = 1;
break;
case 'w':
match_words = 1;
break;
case 'x':
match_lines = 1;
break;
case 0:
/* long options */
break;
default:
usage(2);
break;
}
if (show_version)
{
printf (_("grep (GNU grep) %s\n"), VERSION);
printf ("\n");
printf (_("\
Copyright (C) 1988, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.\n"));
printf (_("\
This is free software; see the source for copying conditions. There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"));
printf ("\n");
exit (0);
}
if (show_help)
usage(0);
if (keys)
{
/* No keys were specified (e.g. -f /dev/null)/ Match nothing/ */
if (keycc == 0)
out_invert ^= 1;
else /* strip trailin newline. */
--keycc;
}
else
if (optind < argc)
{
keys = argv[optind++];
keycc = strlen(keys);
}
else
usage(2);
if (!matcher)
matcher = prog;
if (!setmatcher(matcher) && !setmatcher("default"))
abort();
(*compile)(keys, keycc);
if ((argc - optind > 1 && !no_filenames) || with_filenames)
out_file = 1;
status = 1;
if (optind < argc)
while (optind < argc)
{
if (strcmp(argv[optind], "-") == 0)
{
filename = _("(standard input)");
desc = 0;
}
else
{
#if defined(__MSDOS__) || defined(_WIN32)
struct stat st;
if (stat (argv[optind], &st) == 0 && S_ISDIR(st.st_mode))
{
++optind;
continue;
}
#endif
filename = argv[optind];
desc = open(argv[optind], O_RDONLY);
}
if (desc < 0)