mountpoint(1)

NAME

mountpoint - see if a directory or file is a mountpoint

SYNOPSIS

mountpoint [-d|-q] directory|file

mountpoint -x device

DESCRIPTION

mountpoint checks whether the given directory or file is a mountpoint. On kernels that support the statmount(2) system call (Linux 6.8 and newer), it uses that interface. On older kernels, it falls back to reading /proc/self/mountinfo.

OPTIONS

-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.

--show: Print the mountpoint path for the given path. This resolves the given directory or file to its actual mountpoint, which is useful with bind mounts, symlinks, or paths within filesystems. This option requires kernel support for the statmount(2) system call (Linux 6.8 and newer). On older kernels, this option will fail with an error message.

-h, --help: Display help text and exit.

-V, --version: Display version and exit.

EXIT STATUS

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

ENVIRONMENT

LIBMOUNT_DEBUG=all

enables libmount debug output.

NOTES

The util-linux mountpoint implementation was written from scratch for libmount. The original version for sysvinit suite was written by Miquel van Smoorenburg.

AUTHORS

Karel Zak <[email protected]>

REPORTING BUGS

For bug reports, use the issue tracker <https://github.com/util-linux/util-linux/issues>.

AVAILABILITY

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/>.