Start / stop systemd automount on a single mountpoint

Question

Given a mountpoint (directory) name, how do I start / stop the systemd automounter only on that mountpoint?

I want a solution which works even if the mountpoint:

• is currently mounted
• has [^0-9A-Za-z] characters in the pathname

Answer 1

IIRC this was added relatively recently, but it sounds like you might want to use systemd-mount --umount WHERE. Making sure WHERE is passed correctly in the scripting language of your choice is your problem :).

Or you should be able to use the regular umount command. systemd picks up unmounts using kernel events or something, so you won't end up with a misleading status on the corresponding .automount unit.

Answer 2

Here is an example expressed in shell.

MOUNT="/media/backup"
MOUNT_UNIT="$(systemctl show --property=Id "$MOUNT" | sed -e s/^[^=]*=// )"
AUTOMOUNT_UNIT="$(echo "$MOUNT_UNIT" | sed -e s/[.]mount$/.automount/)"
systemctl stop "$AUTOMOUNT_UNIT"

To try and answer this question completely, you could instead use systemd-escape to generate the unit name, as described in the answer to the linked question.

Answer 3

With thanks to this answer:

#!/bin/bash

if [ $# -ne 1 ]; then
    {
        printf "Stop systemd automount at <mountpoint>\n" "${0##*/}"
        printf "Usage:  %s <mountpoint>\n" "${0##*/}"
    } >&2
    exit 1
fi

MOUNT=$1
sudo systemctl stop "$(systemd-escape -p --suffix=automount "$MOUNT")"