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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009 Red Hat 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 of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
#define MAX_ARGS 64
static char **
grep (const char *regex, const char *path,
int extended, int fixed, int insensitive, int compressed)
{
const char *argv[MAX_ARGS];
size_t i = 0;
CLEANUP_FREE char *out = NULL, *err = NULL;
int fd, flags, r;
char **lines;
if (extended && fixed) {
reply_with_error ("can't use 'extended' and 'fixed' flags at the same time");
return NULL;
}
if (!compressed)
ADD_ARG (argv, i, "grep");
else
ADD_ARG (argv, i, "zgrep");
if (extended)
ADD_ARG (argv, i, "-E");
if (fixed)
ADD_ARG (argv, i, "-F");
if (insensitive)
ADD_ARG (argv, i, "-i");
ADD_ARG (argv, i, regex);
ADD_ARG (argv, i, NULL);
CHROOT_IN;
fd = open (path, O_RDONLY|O_CLOEXEC);
CHROOT_OUT;
if (fd == -1) {
reply_with_perror ("%s", path);
return NULL;
}
/* Note that grep returns an error if no match. We want to
* suppress this error and return an empty list.
*/
flags = COMMAND_FLAG_CHROOT_COPY_FILE_TO_STDIN | fd;
r = commandrvf (&out, &err, flags, argv);
if (r == -1 || r > 1) {
reply_with_error ("%s: %s", regex, err);
return NULL;
}
lines = split_lines (out);
if (lines == NULL) return NULL;
return lines;
}
/* Takes optional arguments, consult optargs_bitmask. */
char **
do_grep (const char *regex, const char *path,
int extended, int fixed, int insensitive, int compressed)
{
if (!(optargs_bitmask & GUESTFS_GREP_EXTENDED_BITMASK))
extended = 0;
if (!(optargs_bitmask & GUESTFS_GREP_FIXED_BITMASK))
fixed = 0;
if (!(optargs_bitmask & GUESTFS_GREP_INSENSITIVE_BITMASK))
insensitive = 0;
if (!(optargs_bitmask & GUESTFS_GREP_COMPRESSED_BITMASK))
compressed = 0;
return grep (regex, path, extended, fixed, insensitive, compressed);
}
char **
do_egrep (const char *regex, const char *path)
{
return grep (regex, path, 1, 0, 0, 0);
}
char **
do_fgrep (const char *regex, const char *path)
{
return grep (regex, path, 0, 1, 0, 0);
}
char **
do_grepi (const char *regex, const char *path)
{
return grep (regex, path, 0, 0, 1, 0);
}
char **
do_egrepi (const char *regex, const char *path)
{
return grep (regex, path, 1, 0, 1, 0);
}
char **
do_fgrepi (const char *regex, const char *path)
{
return grep (regex, path, 0, 1, 1, 0);
}
char **
do_zgrep (const char *regex, const char *path)
{
return grep (regex, path, 0, 0, 0, 1);
}
char **
do_zegrep (const char *regex, const char *path)
{
return grep (regex, path, 1, 0, 0, 1);
}
char **
do_zfgrep (const char *regex, const char *path)
{
return grep (regex, path, 0, 1, 0, 1);
}
char **
do_zgrepi (const char *regex, const char *path)
{
return grep (regex, path, 0, 0, 1, 1);
}
char **
do_zegrepi (const char *regex, const char *path)
{
return grep (regex, path, 1, 0, 1, 1);
}
char **
do_zfgrepi (const char *regex, const char *path)
{
return grep (regex, path, 0, 1, 1, 1);
}
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