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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 <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
int
do_truncate_size (const char *path, int64_t size)
{
int fd;
int r;
CHROOT_IN;
fd = open (path, O_WRONLY|O_NOCTTY|O_CLOEXEC);
CHROOT_OUT;
if (fd == -1) {
reply_with_perror ("open: %s", path);
return -1;
}
r = ftruncate (fd, (off_t) size);
if (r == -1) {
reply_with_perror ("ftruncate: %s", path);
close (fd);
return -1;
}
if (close (fd) == -1) {
reply_with_perror ("close: %s", path);
return -1;
}
return 0;
}
int
do_truncate (const char *path)
{
return do_truncate_size (path, 0);
}
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