NetBSD-5.0.2/usr.bin/grep/util.c
/* $NetBSD: util.c,v 1.5 2007/12/06 20:33:49 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: util.c,v 1.5 2007/12/06 20:33:49 cjep Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <zlib.h>
#include <err.h>
#include <errno.h>
#include <fts.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "grep.h"
/*
* Process a file line by line...
*/
static int linesqueued, newfile;
static int procline(str_t *l, int nottext);
int
grep_tree(char **argv)
{
FTS *fts;
FTSENT *p;
int c, fts_flags;
c = fts_flags = 0;
/* if (linkbehave == LINK_EXPLICIT)
fts_flags = FTS_COMFOLLOW;
if (linkbehave == LINK_SKIP)
fts_flags = FTS_PHYSICAL;
if (linkbehave == LINK_FOLLOW)
fts_flags = FTS_LOGICAL;*/
fts_flags |= FTS_NOSTAT | FTS_NOCHDIR | FTS_LOGICAL;
if ((fts = fts_open(argv, fts_flags, NULL)) == NULL)
err(2, NULL);
while ((p = fts_read(fts)) != NULL) {
switch (p->fts_info) {
case FTS_DNR:
break;
case FTS_ERR:
errx(2, "%s: %s", p->fts_path, strerror(p->fts_errno));
break;
case FTS_DP:
case FTS_D:
break;
case FTS_DC:
warnx("warning: %s: recursive directory loop",
p->fts_path);
break;
default:
c += procfile(p->fts_path);
break;
}
}
return c;
}
int
procfile(const char *fn)
{
str_t ln;
file_t *f;
struct stat sb;
mode_t s;
int c, t, z, nottext, skip;
tail = 0;
newfile = 1;
if (fn == NULL) {
fn = stdin_label;
f = grep_fdopen(STDIN_FILENO, "r");
} else {
skip = 1;
if (dirbehave == GREP_SKIP || devbehave == GREP_SKIP) {
if (stat(fn, &sb)) {
fprintf(stderr, "Cannot stat %s %d\n",
fn, errno);
/* XXX record error variable */
} else {
s = sb.st_mode & S_IFMT;
if (s == S_IFDIR && dirbehave == GREP_SKIP)
skip = 0;
if ( (s == S_IFIFO || s == S_IFCHR ||
s == S_IFBLK || s == S_IFSOCK)
&& devbehave == GREP_SKIP)
skip = 0;
}
}
if (skip == 0)
return 0;
f = grep_open(fn, "r");
}
if (f == NULL) {
if (!sflag)
warn("%s", fn);
return 0;
}
nottext = grep_bin_file(f);
if (nottext && binbehave == BIN_FILE_SKIP) {
/* Skip this file as it is binary */
grep_close(f);
return 0;
}
ln.file = fn;
ln.line_no = 0;
linesqueued = 0;
ln.off = -1;
if (Bflag > 0)
initqueue();
for (c = 0; !(lflag && c);) {
ln.off += ln.len + 1;
if ((ln.dat = grep_fgetln(f, &ln.len)) == NULL)
break;
if (ln.len > 0 && ln.dat[ln.len - 1] == line_endchar)
--ln.len;
ln.line_no++;
z = tail;
if ((t = procline(&ln, nottext)) == 0 && Bflag > 0 && z == 0) {
enqueue(&ln);
linesqueued++;
}
c += t;
/* If we have a maximum number of matches, stop processing */
if (mflag && c >= maxcount)
break;
}
if (Bflag > 0)
clearqueue();
grep_close(f);
if (cflag) {
if (output_filenames)
printf("%s%c", ln.file, fn_colonchar);
printf("%u\n", c);
}
if (lflag && c != 0)
printf("%s%c", fn, fn_endchar);
if (Lflag && c == 0)
printf("%s%c", fn, fn_endchar);
if (c && !cflag && !lflag && !Lflag &&
binbehave == BIN_FILE_BIN && nottext && !qflag)
printf("Binary file %s matches\n", fn);
return c;
}
/*
* Process an individual line in a file. Return non-zero if it matches.
*/
#define isword(x) (isalnum((unsigned char)(x)) || (x) == '_')
static int
procline(str_t *l, int nottext)
{
regmatch_t pmatch;
regmatch_t matches[MAX_LINE_MATCHES];
int c = 0, i, r, t, m = 0;
regoff_t st = 0;
if (matchall) {
c = !vflag;
goto print;
}
t = vflag ? REG_NOMATCH : 0;
while (st <= l->len) {
pmatch.rm_so = st;
pmatch.rm_eo = l->len;
for (i = 0; i < patterns; i++) {
r = regexec(&r_pattern[i], l->dat, 1, &pmatch, eflags);
if (r == REG_NOMATCH && t == 0)
continue;
if (r == 0) {
if (wflag) {
if ((pmatch.rm_so != 0 && isword((unsigned char)l->dat[pmatch.rm_so - 1]))
|| (pmatch.rm_eo != l->len && isword((unsigned char)l->dat[pmatch.rm_eo])))
r = REG_NOMATCH;
}
if (xflag) {
if (pmatch.rm_so != 0 || pmatch.rm_eo != l->len)
r = REG_NOMATCH;
}
}
if (r == t) {
if (m == 0)
c++;
if (m < MAX_LINE_MATCHES) {
matches[m] = pmatch;
m++;
}
st = pmatch.rm_eo;
break;
}
}
/* One pass if we are not recording matches */
if (!oflag && !colours)
break;
if (st == pmatch.rm_so)
break; /* No matches */
}
print:
if (c && binbehave == BIN_FILE_BIN && nottext)
return c; /* Binary file */
if ((tail > 0 || c) && !cflag && !qflag) {
if (c) {
if ( (Aflag || Bflag) && first > 0 &&
( (Bflag <= linesqueued && tail == 0) || newfile) )
printf("--\n");
first = 1;
newfile = 0;
tail = Aflag;
if (Bflag > 0)
printqueue();
linesqueued = 0;
printline(l, fn_colonchar, matches, m);
} else {
printline(l, fn_dashchar, matches, m);
tail--;
}
}
return c;
}
void *
grep_malloc(size_t size)
{
void *ptr;
if ((ptr = malloc(size)) == NULL)
err(2, "malloc");
return ptr;
}
void *
grep_realloc(void *ptr, size_t size)
{
if ((ptr = realloc(ptr, size)) == NULL)
err(2, "realloc");
return ptr;
}
void
printline(str_t *line, int sep, regmatch_t *matches, int m)
{
int i, n = 0;
size_t a = 0;
if (output_filenames) {
fputs(line->file, stdout);
++n;
}
if (nflag) {
if (n)
putchar(sep);
printf("%d", line->line_no);
++n;
}
if (bflag) {
if (n)
putchar(sep);
printf("%lu", (unsigned long)line->off);
}
if (n)
putchar(sep);
if ((oflag || colours) && m > 0) {
for (i = 0; i < m; i++) {
if (!oflag)
fwrite(line->dat + a, matches[i].rm_so - a, 1, stdout);
if (colours)
fprintf(stdout, "\33[%sm", grep_colour);
fwrite(line->dat + matches[i].rm_so,
matches[i].rm_eo - matches[i].rm_so, 1, stdout);
if (colours)
fprintf(stdout, "\33[00m");
a = matches[i].rm_eo;
if (oflag)
putchar('\n');
}
if (!oflag) {
if (line->len - a > 0)
fwrite(line->dat + a, line->len - a, 1, stdout);
putchar('\n');
}
} else {
fwrite(line->dat, line->len, 1, stdout);
putchar(line_endchar);
}
}