1 /* libguestfs - the guestfsd daemon
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32 do_zero (const char *device)
37 fd = open (device, O_WRONLY);
39 reply_with_perror ("%s", device);
43 memset (buf, 0, sizeof buf);
45 for (i = 0; i < 32; ++i) {
46 if (write (fd, buf, sizeof buf) != sizeof buf) {
47 reply_with_perror ("write: %s", device);
51 notify_progress ((uint64_t) i, 32);
54 if (close (fd) == -1) {
55 reply_with_perror ("close: %s", device);
63 do_zero_device (const char *device)
65 int64_t size = do_blockdev_getsize64 (device);
69 int fd = open (device, O_WRONLY);
71 reply_with_perror ("%s", device);
76 memset (buf, 0, sizeof buf);
79 size_t n = (size_t) size > sizeof buf ? sizeof buf : (size_t) size;
80 ssize_t r = write (fd, buf, n);
82 reply_with_perror ("write: %s (with %" PRId64 " bytes left to write)",
90 if (close (fd) == -1) {
91 reply_with_perror ("close: %s", device);