[launchd-dev] launchd StartInterval and sleep

[Todd Heberlein]

What is the expected behavior when using StartInterval to start a script every n seconds and then the machine goes to sleep?


The reason I ask is that I had a StartInterval of 4 hours (14400 seconds), put my laptop to sleep overnight, and when I opened it, I expected the script to automatically execute because the interval expired during the sleep.

But this didn't happen.

Now experimenting with just a 5 minute interval, it seems that if the interval would be reached when the machine is asleep (1) the script doesn't fire when the machine wakes back up, and (2) the start interval starts again using the new wakeup time. For example, the next time the script fires is 5 minutes after wakeup.

Is this the way it is supposed to work, or am I doing something wrong?

Thanks,

Todd