Systemd unit file: Can/Should ExecStart and ExecStop run a script?

[Richard Shaw]

On Wed, Oct 19, 2011 at 3:58 PM, Tom Hughes <tom at compton.nu> wrote:
> On 19/10/11 21:48, Richard Shaw wrote:
>>
>> On Wed, Oct 19, 2011 at 3:26 PM, Lennart Poettering
>> <mzerqung at 0pointer.de>  wrote:
>>>
>>> You should manage acess control of device nodes from udev rules. That's
>>> the only reasonably safe way to handle these things. And this should not
>>> be mentioned at all in systemd unit files.

Ok based on Tom's file I came up with the following. I know Lennart,
you don't like setting ACL's from Systemd, but unless someone want's
to help me write udev rules that will run before the start of
mythbackend and after it's stopped, this is all I have:

[Unit]
Description=MythTV backend service
After=network.target mysqld.service

[Service]
Type=forking
PIDFile=/var/run/mythbackend.pid
Environment=MYTHCONFDIR=/etc/mythtv
Environment=HOME=/etc/mythtv
Environment=MYTHBACKEND_USER=root
EnvironmentFile=-/etc/sysconfig/mythbackend
ExecStartPre=setfacl -m u:${MYTHBACKEND_USER}:x -R /dev/snd /dev/dvb
/dev/video* /dev/vbi*
ExecStart=/usr/bin/mythbackend --daemon --user $MYTHBACKEND_USER
--logfile /var/log/mythtv/mythbackend.log --pidfile
/var/run/mythbackend.pid $OPTIONS
ExecStopPost=setfacl -x u:${MYTHBACKEND_USER} -R /dev/snd /dev/dvb
/dev/video* /dev/vbi*

[Install]
WantedBy=multi-user.target

Thanks,
Richard