--target-prefix /chroot -o X-mount.mkdir

           mounts all from system fstab to /chroot, all missing mountpoint are
           created (due to X-mount.mkdir). See also --fstab to use an
           alternative fstab.

       -T, --fstab path
           Specifies an alternative fstab file. If path is a directory, then
           the files in the directory are sorted by strverscmp(3); files that
           start with "." or without an .fstab extension are ignored. The
           option can be specified more than once. This option is mostly
           designed for initramfs or chroot scripts where additional
           configuration is specified beyond standard system configuration.

           Note that mount does not pass the option --fstab to the
           /sbin/mount.type helpers, meaning that the alternative fstab files
           will be invisible for the helpers. This is no problem for normal
           mounts, but user (non-root) mounts always require fstab to verify
           the user’s rights.

       -t, --types fstype
           The argument following the -t is used to indicate the filesystem
           type. The filesystem types which are currently supported depend on
           the running kernel. See /proc/filesystems and /lib/modules/$(uname
           -r)/kernel/fs for a complete list of the filesystems. The most
           common are ext2, ext3, ext4, xfs, btrfs, vfat, sysfs, proc, nfs and
           cifs.

           The programs mount and umount(8) support filesystem subtypes. The
           subtype is defined by a '.subtype' suffix. For example 'fuse.sshfs'.
           It’s recommended to use subtype notation rather than add any prefix
           to the mount source (for example 'sshfs#example.com' is deprecated).

           If no -t option is given, or if the auto type is specified, mount
           will try to guess the desired type. mount uses the libblkid(3)
           library for guessing the filesystem type; if that does not turn up
           anything that looks familiar, mount will try to read the file
           /etc/filesystems, or, if that does not exist, /proc/filesystems. All
           of the filesystem types listed there will be tried, except for those
           that are labeled "nodev" (e.g. devpts, proc and nfs). If
           /etc/filesystems ends in a line with a single *, mount will read
           /proc/filesystems afterwards. While trying, all filesystem types
           will be mounted with the mount option silent.

           The auto type may be useful for user-mounted floppies. Creating a
           file /etc/filesystems can be useful to change the probe order (e.g.,
           to try vfat before msdos or ext3 before ext2) or if you use a kernel
           module autoloader.

           More than one type may be specified in a comma-separated list, for
           the -t option as well as in an /etc/fstab entry. The list of
           filesystem types for the -t option can be prefixed with no to
           specify the filesystem types on which no action should be taken. The
           prefix no has no effect when specified in an /etc/fstab entry.

           The prefix no can be meaningful with the -a option. For example, the
           command

           mount -a -t nomsdos,smbfs

           mounts all filesystems except those of type msdos and smbfs.

           For most types all the mount program has to do is issue a simple
           mount(2) system call, and no detailed knowledge of the filesystem
           type is required. For a few types however (like nfs, nfs4, cifs,
           smbfs, ncpfs) an ad hoc code is necessary. The nfs, nfs4, cifs,
           smbfs, and ncpfs filesystems have a separate mount program. In order
           to make it possible to treat all types in a uniform way, mount will
           execute the program /sbin/mount.type (if that exists) when called
           with type type. Since different versions of the smbmount program
           have different