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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., 675 Mass Ave, Cambridge, MA 02139, 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"
static char **
grep (const char *prog, const char *flag, const char *regex, const char *path)
{
char *out, *err;
int fd, flags, r;
char **lines;
CHROOT_IN;
fd = open (path, O_RDONLY);
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 = commandrf (&out, &err, flags, prog, flag, regex, NULL);
if (r == -1 || r > 1) {
reply_with_error ("%s %s %s: %s", prog, flag, regex, err);
free (out);
free (err);
return NULL;
}
free (err);
lines = split_lines (out);
free (out);
if (lines == NULL) return NULL;
return lines;
}
char **
do_grep (const char *regex, const char *path)
{
/* The "--" is not really needed, but it helps when we don't need a flag. */
return grep ("grep", "--", regex, path);
}
char **
do_egrep (const char *regex, const char *path)
{
return grep ("egrep", "--", regex, path);
}
char **
do_fgrep (const char *regex, const char *path)
{
return grep ("fgrep", "--", regex, path);
}
char **
do_grepi (const char *regex, const char *path)
{
return grep ("grep", "-i", regex, path);
}
char **
do_egrepi (const char *regex, const char *path)
{
return grep ("egrep", "-i", regex, path);
}
char **
do_fgrepi (const char *regex, const char *path)
{
return grep ("fgrep", "-i", regex, path);
}
char **
do_zgrep (const char *regex, const char *path)
{
return grep ("zgrep", "--", regex, path);
}
char **
do_zegrep (const char *regex, const char *path)
{
return grep ("zegrep", "--", regex, path);
}
char **
do_zfgrep (const char *regex, const char *path)
{
return grep ("zfgrep", "--", regex, path);
}
char **
do_zgrepi (const char *regex, const char *path)
{
return grep ("zgrep", "-i", regex, path);
}
char **
do_zegrepi (const char *regex, const char *path)
{
return grep ("zegrep", "-i", regex, path);
}
char **
do_zfgrepi (const char *regex, const char *path)
{
return grep ("zfgrep", "-i", regex, path);
}
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