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 :: Mailing Lists

[ILUG] Signal handling

[ILUG] Signal handling

Dale Dunlea daledunlea at commergy.com
Tue Dec 7 19:02:02 GMT 2004


> > But sometimes bad things happen. Sometime programs crash. 
> But the pid 
> > of the child process is stored and so when the program restarts, it 
> > knows the pid of the child process of its previous 
> instance. I need to 
> > install a signal handler in the new program instance for 
> the old child 
> > process - to reparent it essentially. I presume there is a way of 
> > doing this, but I'm quite new to process control and all that.
> 
> btw the most common idiom here would be to either (a) kill 
> the subprocess and start a new one when the new parent 
> starts, or (b) kill the subprocess from the parent's SIGTERM 
> signal handler before it exits.
> 
> I think a bit more info is needed btw.

It's an audio app and the child process is the actual audio player
program. Killing it an restarting is a little messy. Hence the desire to
let it play out even though the process that spawned it has died.





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