How can I tell if a script was called from systemd or from a user?
I created a service for an old school daemon. We just switched to systemd and some of my admin like to call the rc-script directly. This won't work very well in the case of machine reboot. Systemd won't honor the PIDFile= because the new started daemon is not part of it's cgroup for the service.
I added the service file and the rc_script. I can't differ by user id, because to use the script the user has to be foobaruser.
The stop service is now problem, because systemd will recognize this from the deleted pid file.
So how do I find out if the script was called from systemd?
foobar.service
[Unit]
Description=Foobar Service
After=syslog.target network.target
[Service]
Type=forking
User=foobaruser
LimitNOFILE=60000
LimitNPROC=8000
TasksMax=8000
PIDFile=/local/foobar/foo.pid
ExecStart=/opt/foobar/rc_script start
ExecStop=/opt/foobar/rc_script stop
TimeoutSec=100
TimeoutStopSec=300
KillMode=none
RemainAfterExit=no
Environment=LANG=de_DE.UTF-8
[Install]
WantedBy=multi-user.target
/opt/foobar/rc_script skeleton
#!/bin/bash
case $1 in
start)
VAR_IS_SYSTEMD=$( ... script to check if bash is run from systemd ... )
if [ "$VAR_IS_SYSTEMD" = false ] ; then
sudo systemctl start foobar.service
exit
fi
# start service within systemd
;;
stop)
# stop service
;;
esac