Man1 - mountpoint.1

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 directory path.

-x, –devno

Show the major/minor numbers of the given blockdevice on standard output.

-V, –version

Display version information and exit.

-h, –help

Display help text 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/karelzak/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/.