ZFS_RDISK_ROOT
ZFS_RDISK_ROOT, strrchr(arg, '/'), BACKUP_SLICE);
(void) snprintf(path, sizeof (path), "%s/%s", ZFS_RDISK_ROOT, name);
(void) snprintf(diskname, sizeof (diskname), "%s%s", ZFS_RDISK_ROOT,
(void) snprintf(path, sizeof (path), "%s/%s%s", ZFS_RDISK_ROOT, name,
#define ZFS_RDISK_ROOTD ZFS_RDISK_ROOT "/"