static int cmd_list(int argc, char **argv)
{
int ret;
char *object = NULL;
int types = 0;
if (check_argc_min(argc, 2) || check_argc_max(argc, 3))
usage(cmd_list_usage);
parse_args(argc, argv, cmd_list_usage, &types, &object, NULL, NULL);
if (!object) {
fprintf(stderr, "ERROR: invalid arguments.\n");
usage(cmd_set_usage);
}
ret = dump_props(types, object, 1);
return ret;
}
static int cmd_set(int argc, char **argv)
{
int ret;
char *object;
char *name;
char *value;
int types = 0;
if (check_argc_min(argc, 4) || check_argc_max(argc, 5))
usage(cmd_set_usage);
parse_args(argc, argv, cmd_set_usage, &types, &object, &name, &value);
if (!object || !name || !value) {
fprintf(stderr, "ERROR: invalid arguments.\n");
usage(cmd_set_usage);
}
ret = setget_prop(types, object, name, value);
return ret;
}
static int cmd_get(int argc, char **argv)
{
int ret;
char *object;
char *name = NULL;
int types = 0;
if (check_argc_min(argc, 2) || check_argc_max(argc, 4))
usage(cmd_get_usage);
parse_args(argc, argv, cmd_get_usage, &types, &object, &name, NULL);
if (!object) {
fprintf(stderr, "ERROR: invalid arguments.\n");
usage(cmd_set_usage);
}
if (name)
ret = setget_prop(types, object, name, NULL);
else
ret = dump_props(types, object, 0);
return ret;
}
static void parse_args(int argc, char **argv,
const char * const *usage_str,
int *types, char **object,
char **name, char **value, int min_nonopt_args)
{
int ret;
char *type_str = NULL;
int max_nonopt_args = 1;
optind = 1;
while (1) {
int c = getopt(argc, argv, "t:");
if (c < 0)
break;
switch (c) {
case 't':
type_str = optarg;
break;
default:
usage(usage_str);
}
}
if (name)
max_nonopt_args++;
if (value)
max_nonopt_args++;
if (check_argc_min(argc - optind, min_nonopt_args) ||
check_argc_max(argc - optind, max_nonopt_args))
usage(usage_str);
*types = 0;
if (type_str) {
if (!strcmp(type_str, "s") || !strcmp(type_str, "subvol")) {
*types = prop_object_subvol;
} else if (!strcmp(type_str, "f") ||
!strcmp(type_str, "filesystem")) {
*types = prop_object_root;
} else if (!strcmp(type_str, "i") ||
!strcmp(type_str, "inode")) {
*types = prop_object_inode;
} else if (!strcmp(type_str, "d") ||
!strcmp(type_str, "device")) {
*types = prop_object_dev;
} else {
error("invalid object type: %s", type_str);
usage(usage_str);
}
}
*object = argv[optind++];
if (optind < argc)
*name = argv[optind++];
if (optind < argc)
*value = argv[optind++];
if (!*types) {
ret = autodetect_object_types(*object, types);
if (ret < 0) {
error("failed to detect object type: %s",
strerror(-ret));
usage(usage_str);
}
if (!*types) {
error("object is not a btrfs object: %s", *object);
usage(usage_str);
}
}
}
static int cmd_device_scan(int argc, char **argv)
{
int i;
int devstart;
int all = 0;
int ret = 0;
optind = 0;
while (1) {
int c;
static const struct option long_options[] = {
{ "all-devices", no_argument, NULL, 'd'},
{ NULL, 0, NULL, 0}
};
c = getopt_long(argc, argv, "d", long_options, NULL);
if (c < 0)
break;
switch (c) {
case 'd':
all = 1;
break;
default:
usage(cmd_device_scan_usage);
}
}
devstart = optind;
if (all && check_argc_max(argc - optind, 1))
usage(cmd_device_scan_usage);
if (all || argc - optind == 0) {
printf("Scanning for Btrfs filesystems\n");
ret = btrfs_scan_devices();
error_on(ret, "error %d while scanning", ret);
ret = btrfs_register_all_devices();
error_on(ret, "there are %d errors while registering devices", ret);
goto out;
}
for( i = devstart ; i < argc ; i++ ){
char *path;
if (is_block_device(argv[i]) != 1) {
error("not a block device: %s", argv[i]);
ret = 1;
goto out;
}
path = canonicalize_path(argv[i]);
if (!path) {
error("could not canonicalize path '%s': %m", argv[i]);
ret = 1;
goto out;
}
printf("Scanning for Btrfs filesystems in '%s'\n", path);
if (btrfs_register_one_device(path) != 0) {
ret = 1;
free(path);
goto out;
}
free(path);
}
out:
return !!ret;
}
static int cmd_scan_dev(int argc, char **argv)
{
int i, fd, e;
int checklist = 1;
int devstart = 1;
if( argc > 1 && !strcmp(argv[1],"--all-devices")){
if (check_argc_max(argc, 2))
usage(cmd_scan_dev_usage);
checklist = 0;
devstart += 1;
}
if(argc<=devstart){
int ret;
printf("Scanning for Btrfs filesystems\n");
if(checklist)
ret = btrfs_scan_block_devices(1);
else
ret = btrfs_scan_one_dir("/dev", 1);
if (ret){
fprintf(stderr, "ERROR: error %d while scanning\n", ret);
return 18;
}
return 0;
}
fd = open("/dev/btrfs-control", O_RDWR);
if (fd < 0) {
perror("failed to open /dev/btrfs-control");
return 10;
}
for( i = devstart ; i < argc ; i++ ){
struct btrfs_ioctl_vol_args args;
int ret;
printf("Scanning for Btrfs filesystems in '%s'\n", argv[i]);
strncpy(args.name, argv[i], BTRFS_PATH_NAME_MAX);
args.name[BTRFS_PATH_NAME_MAX-1] = 0;
/*
* FIXME: which are the error code returned by this ioctl ?
* it seems that is impossible to understand if there no is
* a btrfs filesystem from an I/O error !!!
*/
ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
e = errno;
if( ret < 0 ){
close(fd);
fprintf(stderr, "ERROR: unable to scan the device '%s' - %s\n",
argv[i], strerror(e));
return 11;
}
}
close(fd);
return 0;
}
static int cmd_scan_dev(int argc, char **argv)
{
int i;
int devstart = 1;
int all = 0;
int ret = 0;
optind = 1;
while (1) {
int c;
static const struct option long_options[] = {
{ "all-devices", no_argument, NULL, 'd'},
{ NULL, 0, NULL, 0}
};
c = getopt_long(argc, argv, "d", long_options, NULL);
if (c < 0)
break;
switch (c) {
case 'd':
all = 1;
break;
default:
usage(cmd_scan_dev_usage);
}
}
if (all && check_argc_max(argc, 2))
usage(cmd_scan_dev_usage);
if (all || argc == 1) {
printf("Scanning for Btrfs filesystems\n");
ret = btrfs_scan_lblkid();
if (ret)
fprintf(stderr, "ERROR: error %d while scanning\n", ret);
ret = btrfs_register_all_devices();
if (ret)
fprintf(stderr, "ERROR: error %d while registering\n", ret);
goto out;
}
for( i = devstart ; i < argc ; i++ ){
char *path;
if (!is_block_device(argv[i])) {
fprintf(stderr,
"ERROR: %s is not a block device\n", argv[i]);
ret = 1;
goto out;
}
path = canonicalize_path(argv[i]);
if (!path) {
fprintf(stderr,
"ERROR: Could not canonicalize path '%s': %s\n",
argv[i], strerror(errno));
ret = 1;
goto out;
}
printf("Scanning for Btrfs filesystems in '%s'\n", path);
if (btrfs_register_one_device(path) != 0) {
ret = 1;
free(path);
goto out;
}
free(path);
}
out:
return !!ret;
}