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#!/usr/bin/perl

...
    print "return value from child is $pid and status was $status\n";
}
print "".localtime(),"\n";

Sat Sep 29 09:04:00 2007
child is 26171
Alarm triggered, making system call in 26170
return value from child is -1 and status was -1
Sat Sep 29 09:04:02 2007

#include <stdio.h>
...
    printf("return value from system %d\n", rt);

}

in alarm_sig
unlink failed: No such file or directory
return value from system 0