[Q] Can I write auto reboot script?

Hi XDA community

My phone has a problem. The AudioPolicy and AudioFlinger don't start sometimes at boot (like this). If device reboot it,It starts and my phone can boot up successfully.

I want to write a auto reboot init.d script.;

If script see "waiting for media.audio.policy" in logcat,do "reboot"

How can I create this script?

Thanks in advance :)