Change type of systemd.service

[DimitriPapadopoulos]

Change to notify:

Behavior of notify is similar to exec; however, it is expected that the service sends a notification message via sd_notify(3) or an equivalent call when it has finished starting up. systemd will proceed with starting follow-up units after this notification message has been sent.

If notify doesn't work, we could fall back to exec:

The exec type is similar to simple, but the service manager will consider the unit started immediately after the main service binary has been executed.

[DimitriPapadopoulos]

As usual, the ArchLinux documentation is quite good, much better than the systemd documentation itself:

• Type=simple (default): systemd considers the service to be started up immediately. The process must not fork. Do not use this type if other services need to be ordered on this service, unless it is socket activated.
• Type=notify: identical to Type=simple, but with the stipulation that the daemon will send a signal to systemd when it is ready.