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I'm trying to automount a USB device upon plugin but it refuses to mount. I set a rule to execute the following script : 

#!/bin/bash mkdir /media/mnt echo AFTER MKDIR > /home/output sleep 5 echo AFTER SLEEP >> /home/output mount /dev/sdb1 /media/mnt echo $? >> /home/output echo AFTER MOUNT >> /home/output

The script gets executed nicely, lsblk shows that /dev/sdb1 is present, output contain all the echoes, yet sdb1 won't be mounted in /media/mnt. The mount command exit code is 0

When I execute the mount command in that script manually after the USB device is plugged in it mounts it without problem.

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  • Where did you set that rule? Is it run by root? Perhaps adding a line in your script to validate the effective UID might be a good idea: id >> /home/output Commented Jul 31, 2016 at 18:10
  • @JuliePelletier in /etc/udev/rules.d both the script and the rule where made by root. id returns root Commented Jul 31, 2016 at 18:30
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    Are you using systemd? Commented Jul 31, 2016 at 18:31
  • @meuh no I'm using udev that calls the script in OP Commented Jul 31, 2016 at 18:35
  • But is your archlinux configured to use systemd for most things? Commented Jul 31, 2016 at 18:36

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Had to add MountFlags=shared in /usr/lib/systemd/system/systemd-udevd.service, whatever this is. See mount is not executed when called by udev

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