myapp.service

[Unit]
Description=myapp service
Wants=network-online.target
After=network-online.target

[Service]
OpenFile=/run/no_user_access/myapp.service.mainpid:mainpidfile:truncate

User=test

Restart=no
TimeoutStopSec=70

ExecStartPre=+touch /run/no_user_access/myapp.service.mainpid
ExecStartPre=+truncate --size 0 /run/no_user_access/myapp.service.mainpid
ExecStartPre=+touch /run/myapp.service.result
ExecStartPre=+truncate --size 0 /run/myapp.service.result

ExecStart=/var/tmp/myservice /run/myapp.service.result
ExecStartPost=+/var/tmp/notifymainpid /run/no_user_access/myapp.service.mainpid /run/myapp.service.result

ExecStopPost=/bin/rm /run/no_user_access/myapp.service.mainpid
ExecStopPost=/bin/rm /run/myapp.service.result

Type=notify
NotifyAccess=all

[Install]
WantedBy=default.target