How to schedule shutdown of the Jolla ? [answered]

Why not using systemd timers ? Seems to me more logical on a systemd-powered OS.

@DrYak: I didn't know that SailFish was a systemd-powered OS, can you help me translat my crontab to a systemd timer ?

Here's the sysmted equivalent:

[Unit]
Description=Timer to schedule shutdown  of the Jolla
[Timer]
OnCalendar=23:00
AccuracySec=1usec

accuracy is used to schedule several timer happening all at the same time. systemd will avoid launching them all at the same time and will instead launch one after the other, each launch being at worst within "AccuracySec" from desired time.

(i.e.: One can set all the maintenance to be 10 min after boot with "BootSec" and systemctl will avoid launching all the scripts simultaneously. It's the equivalent of putting irregular times in a crontab (e.g.: putting a hourly job at "52" minutes, to avoid it running together with other jobs) )

If there's another time that you desperatly need to have happening at exactly 23:00, and can wait the shutdown to happen at 23:05, then put: AccuracySec=5min

Once it gets implemented correctly, one could use WakeSystem=true for the opposite (for waking up the system to perform a task). I haven't tested if its supported on Jolla yet.

Then there's the corresponding service:

[Unit]
Description=Shutdown of the Jolla

[Service]
Type=oneshot
ExecStart=/usr/sbin/dsmetool --shutdown

oneshot type are for service where one command eventually finish (like your shutting down of the jolla) as opposed of services that leave a daemon running in the background (say: a file server), thus systemd knows that its normal for the service not to start.

You can then put your files in:

${HOME}/.config/systemd/user/{timer}.timer and
${HOME}/.config/systemd/user/{timer}.service

(note that for ease of configuration, both timer and service should have the same name. It's also possible to use different names, if you specify the service in the timer file)

Then enable the timer with:

systemctl --user start{timer}.timer

You can check the timer with :

systemctl --user list-timers

It will indicate how much time is left until the next timer.

@DrYak Thanks for this tutorial. I can see more clearly now what you are taking about. Btw : The command systemctl --user list-timers is not available in systemd-208-1.8.1.armv7hl package

@DrYak, the "WakeSystem=true" option doesn't work on Jolla, as far as I know...