Trapping a process crash

[talisker123gjs]

Hello
I am aware of the "trap" command to trap various signals.
I am running a shell script as a daemon. In case this daemon crashes for some reason, I wish to trap the relevant signal and echo some information into a file.

Which signal do I need to trap when my daemon simply crashes ?

Thanks

 

[PHV]

In ksh you can try something like this:

for sig in $(kill -l); do
  trap "echo signal $sig received >>/path/to/log" $sig
done

Hope This Help
PH.

 

[pcorchary]

Part of the problem may be that trap is for catching signals ... maybe your script is crashing on it's own, not from a signal?

You can use trap with no signal#, or use 0 for shell exit, that way you can write a debug routine that is called.