2 * Copyright (c) 2016 Andriy Gapon <avg@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/types.h>
40 /* Keep in sync with zfsboot.c. */
41 #define MAX_COMMAND_LEN 512
43 int main(int argc, const char * const *argv)
53 fprintf(stderr, "usage: zfsbootcfg <boot.config(5) options>\n");
57 len = strlen(argv[1]);
58 if (len >= MAX_COMMAND_LEN) {
59 fprintf(stderr, "options string is too long\n");
63 if (kenv(KENV_GET, "vfs.zfs.boot.primary_pool", buf, sizeof(buf)) <= 0) {
64 perror("can't get vfs.zfs.boot.primary_pool");
67 pool_guid = strtoumax(buf, NULL, 10);
69 perror("can't parse vfs.zfs.boot.primary_pool");
73 if (kenv(KENV_GET, "vfs.zfs.boot.primary_vdev", buf, sizeof(buf)) <= 0) {
74 perror("can't get vfs.zfs.boot.primary_vdev");
77 vdev_guid = strtoumax(buf, NULL, 10);
79 perror("can't parse vfs.zfs.boot.primary_vdev");
83 if ((hdl = libzfs_init()) == NULL) {
84 (void) fprintf(stderr, "internal error: failed to "
85 "initialize ZFS library\n");
89 if (zpool_nextboot(hdl, pool_guid, vdev_guid, argv[1]) != 0) {
90 perror("ZFS_IOC_NEXTBOOT failed");
96 printf("zfs next boot options are successfully written\n");