snapdSB.service can't mount /snap due to permission denied

[castrojo]

The service file is getting a permission denied error when trying to run the mount prep script:

Jul 02 09:33:01 localhost.localdomain systemd[842]: snapdSB.service: Failed at step EXEC spawning /opt/snapdSB/snapdSB.sh: Permission denied

Running the file by hand after boot fixes it and /snap is mounted properly. Still investigating, thought I would file this first!

[lbssousa]

/snap symlink creation at boot time can be achieved by creating a file /etc/tmpfiles.d/snapd.conf with the following content:

L /snap - - - - /var/lib/snapd/snap

Never mind: it won't avoid the "permission denied" error above.

[lbssousa]

I've just realized whatś happening. systemd service files don't support shell scripts in Exec= option, so we need to fix snapdSB.service in the following way:

[Service]
(...)
ExecStart=/bin/bash /opt/snapdSB/snapdSB.sh
ExecStopPost=/usr/bin/chattr +i /