mountpoint - see if a directory or file is a mountpoint
mountpoint [-d|-q]
directory|file
mountpoint -x device
mountpoint checks whether the given
directory or file is mentioned in the
/proc/self/mountinfo file.
-d, --fs-devno
Show the major/minor numbers of the device that is mounted on the given directory.
-q, --quiet
Be quiet - don’t print anything.
--nofollow
Do not follow symbolic link if it the last element of the
directorypath.
-x, --devno
Show the major/minor numbers of the given blockdevice on standard output.
-h, --help
Display help text and exit.
-V, --version
Print version and exit.
mountpoint has the following exit status values:
0
success; the directory is a mountpoint, or device is block device on --devno
1
failure; incorrect invocation, permissions or system error
32
failure; the directory is not a mountpoint, or device is not a block device on --devno
LIBMOUNT_DEBUG=all
enables libmount debug output.
The util-linux mountpoint implementation was written from scratch for libmount. The original version for sysvinit suite was written by Miquel van Smoorenburg.
mount(8)
For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues>.
The mountpoint command is part of the util-linux
package which can be downloaded from Linux Kernel Archive
<https://www.kernel.org/pub/linux/utils/util-linux/>.