File: [local] / src / usr.bin / grep / util.c (download)
Revision 1.3, Sun Jun 22 22:38:50 2003 UTC (20 years, 11 months ago) by deraadt
Branch: MAIN
Changes since 1.2: +2 -2 lines
proper $OpenBSD$
|
/* $OpenBSD: util.c,v 1.3 2003/06/22 22:38:50 deraadt 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/types.h>
#include <sys/stat.h>
#include <ctype.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 <zlib.h>
#include "grep.h"
/*
* Process a file line by line...
*/
static int linesqueued;
static int procline(str_t *l);
int
grep_tree(char **argv)
{
FTS *fts;
FTSENT *p;
int c, fts_flags;
c = fts_flags = 0;
if (Hflag)
fts_flags = FTS_COMFOLLOW;
if (Pflag)
fts_flags = FTS_PHYSICAL;
if (Sflag)
fts_flags = FTS_LOGICAL;
fts_flags |= FTS_NOSTAT | FTS_NOCHDIR;
if (!(fts = fts_open(argv, fts_flags, (int (*) ()) NULL)))
err(1, NULL);
while ((p = fts_read(fts)) != NULL) {
switch (p->fts_info) {
case FTS_DNR:
break;
case FTS_ERR:
errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
break;
case FTS_DP:
break;
default:
c += procfile(p->fts_path);
break;
}
}
return c;
}
int
procfile(char *fn)
{
str_t ln;
file_t *f;
int c, t, z;
if (fn == NULL) {
fn = "(standard input)";
f = grep_fdopen(STDIN_FILENO, "r");
} else {
f = grep_open(fn, "r");
}
if (f == NULL) {
if (!sflag)
warn("%s", fn);
return 0;
}
if (aflag && grep_bin_file(f)) {
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] == '\n')
--ln.len;
ln.line_no++;
z = tail;
if ((t = procline(&ln)) == 0 && Bflag > 0 && z == 0) {
enqueue(&ln);
linesqueued++;
}
c += t;
}
if (Bflag > 0)
clearqueue();
grep_close(f);
if (cflag) {
if (!hflag)
printf("%s:", ln.file);
printf("%u\n", c);
}
if (lflag && c != 0)
printf("%s\n", fn);
if (Lflag && c == 0)
printf("%s\n", fn);
return c;
}
/*
* Process an individual line in a file. Return non-zero if it matches.
*/
#define isword(x) (isalnum(x) || (x) == '_')
static int
procline(str_t *l)
{
regmatch_t pmatch;
int c, i, r, t;
if (matchall) {
c = !vflag;
goto print;
}
t = vflag ? REG_NOMATCH : 0;
pmatch.rm_so = 0;
pmatch.rm_eo = l->len;
for (c = i = 0; i < patterns; i++) {
r = regexec(&r_pattern[i], l->dat, 0, &pmatch, eflags);
if (r == REG_NOMATCH && t == 0)
continue;
if (r == 0) {
if (wflag) {
if ((pmatch.rm_so != 0 && isword(l->dat[pmatch.rm_so - 1]))
|| (pmatch.rm_eo != l->len && isword(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) {
c++;
break;
}
}
print:
if ((tail > 0 || c) && !cflag && !qflag) {
if (c) {
if (first > 0 && tail == 0 && (Bflag < linesqueued) && (Aflag || Bflag))
printf("--\n");
first = 1;
tail = Aflag;
if (Bflag > 0)
printqueue();
linesqueued = 0;
printline(l, ':');
} else {
printline(l, '-');
tail--;
}
}
return c;
}
void *
grep_malloc(size_t size)
{
void *ptr;
if ((ptr = malloc(size)) == NULL)
err(1, "malloc");
return ptr;
}
void *
grep_realloc(void *ptr, size_t size)
{
if ((ptr = realloc(ptr, size)) == NULL)
err(1, "realloc");
return ptr;
}
void
printline(str_t *line, int sep)
{
int n;
n = 0;
if (!hflag) {
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);
fwrite(line->dat, line->len, 1, stdout);
putchar('\n');
}