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Property	Old Value	New Value
svn:eol-style	null	native \ No newline at end of property
svn:keywords	null	FreeBSD=%H \ No newline at end of property
svn:mime-type	null	text/plain \ No newline at end of property


				#include <sys/types.h>
				#include <errno.h>
				#include <limits.h>
				#include <inttypes.h>
				#include <stdio.h>
				#include <stdlib.h>
				#include <string.h>
				#include <kenv.h>

				#include <libzfs.h>

				/* Keep in sync with zfsboot.c. */
				#define MAX_COMMAND_LEN 512

				int main(int argc, const char * const *argv)
				{
				char buf[32];
				libzfs_handle_t *hdl;
				uint64_t pool_guid;
				uint64_t vdev_guid;
				int zfs_fd;
				int len;

				if (argc != 2) {
				fprintf(stderr, "usage: znextboot <boot.config(5) options>\n");
				return (1);
				}

				len = strlen(argv[1]);
				if (len == 0) {
				fprintf(stderr, "empty options are not allowed\n");
				return (1);
				}
				if (len >= MAX_COMMAND_LEN) {
				fprintf(stderr, "options string is too long\n");
				return (1);
				}

				if (kenv(KENV_GET, "vfs.zfs.boot.primary_pool", buf, sizeof(buf)) <= 0) {
				perror("can't get vfs.zfs.boot.primary_pool");
				return (1);
				}
				pool_guid = strtoumax(buf, NULL, 10);
				if (pool_guid == 0) {
				perror("can't parse vfs.zfs.boot.primary_pool");
				return (1);
				}

				if (kenv(KENV_GET, "vfs.zfs.boot.primary_vdev", buf, sizeof(buf)) <= 0) {
				perror("can't get vfs.zfs.boot.primary_vdev");
				return (1);
				}
				vdev_guid = strtoumax(buf, NULL, 10);
				if (vdev_guid == 0) {
				perror("can't parse vfs.zfs.boot.primary_vdev");
				return (1);
				}

				if ((hdl = libzfs_init()) == NULL) {
				(void) fprintf(stderr, "internal error: failed to "
				"initialize ZFS library\n");
				return (1);
				}

				if (zpool_nextboot(hdl, pool_guid, vdev_guid, argv[1]) != 0) {
				perror("ZFS_IOC_NEXTBOOT failed");
				libzfs_fini(hdl);
				return (1);
				}

				libzfs_fini(hdl);
				printf("zfs next boot options are successfully written\n");
				return (0);
				}