I thought I had it figured out.... but not so.
GOAL: To create a program "timeread" with syntax:
timeread <secs> <prompt>
which returns the input value on stdout, or an exit value of 1 if
timedout, or 2 if aborted by the user.
METHOD:
The current method I'm using is to spawn a process (background)
which will sleep the appropriate amount of time, then kill the
prompting process, which catches the signal and acts
appropriately.
The flip side is that if input is taken, then the spawned sleeper
process is killed and the program exits with data on stdout.
PROBLEM(S):
1. The original process can't kill the sleeper; sleep appears to
ignore all signals until AFTER it is complete; GNU sleep does this
too.
2. The original process can't exit until its children (i.e., the sleeper
process) completes - it becomes (almost) a zombie.
SOLUTION:
Anyone know?
--
David Douthitt
UNIX Systems Administrator
HP-UX, Linux, Unixware
[EMAIL PROTECTED]
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