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Actually I coded up an example that uses setitimer() and also avoids the problem discussed in the paragraph above. My example also uses signals to terminate the program gracefully. My example is in C but you could call RPG subprocedures from the C code to do what you want. My example is here: http://archive.midrange.com/c400-l/200511/msg00007.html
I don't see how your code solves the problems I discussed (aside from the fact that all it does is print a message, and there's no way that could take that long.
Also, your code doesn't run on the iSeries -- at least not on my V5R3 system. It crashes immediately with a floating point error, and never even gets to the point of calling setitimer().
It also uses the signal() API which is slow because it saves the program stack when it receives a signal and restores it when the signal handler exits. This behavior is annoying because it also means you can't use global variables to communicate with your signal handler.
I don't understand why you think a Linux C solution is an appropriate answer for an iSeries RPG question.
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