Detecting user-activity on mac os x

Question

I use the function "IOPMSchedulePowerEvent" to schedule Sleep or Wake-Events and registered my daemon with "IORegisterForSystemPower" to receive power-state-changes. Everything works fine!

When system going sleep and later waking up at scheduled time, my daemon do some work, and after it system should going sleep again.

Now my questions:

1. How can i detect, if the system was awaked by user or by the scheduled time?

2. How can i detect, if a user currently working with the system, so the daemon have not to put it in sleep-mode???

Thanks Nobik

Answer 1

There's an easy way to detect various forms of user interaction: Using CGEventSourceCounterForEventType you can query the number of keyboard presses or mouse moves since boot time. By doing this at regular intervals and comparing the counts, you can detect interaction.