Function btrfsutil_sys::btrfs_util_get_subvolume_read_only_fd

pub unsafe extern "C" fn btrfs_util_get_subvolume_read_only_fd(
    fd: c_int, 
    ret: *mut bool
) -> btrfs_util_error

btrfs_util_get_subvolume_read_only_fd() - See btrfs_util_get_subvolume_read_only().