How to time out a program in bash

[Kevin O'Gorman]

I'm not sure where to ask this, but surely there are bash script experts
watching...

I'm trying to write a bash script to test a some student programs.  Some of
them
get wedged, and I can use ulimit to catch most of that.  However, if they
wedge
reading stdin when they are not supposed to, ulimit does not catch them.

Can a bash script use an alarm?  Anybody have a quick recipe?  Or another
approach?

++ kevin

-- 
Kevin O'Gorman, PhD
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