- "btrfs subvolume show <subvol-path>",
- "Show more information of the subvolume",
+ "btrfs subvolume show [options] <subvol-path>|<mnt>",
+ "Show more information about the subvolume",
+ "-r|--rootid rootid of the subvolume",
+ "-u|--uuid uuid of the subvolume",
+ "",
+ "If no option is specified, <subvol-path> will be shown, otherwise",
+ "the rootid or uuid are resolved relative to the <mnt> path.",