On 4/20/23 1:53 PM, Dale R. Worley wrote:
How difficult would it be to add an optional timeout argument to the
"wait" builtin?
Try a variant of this.
trap 'echo timeout!' USR1 # choose your fighter
wait_with_timeout()
{
pid=$1
timeout=$2
{ sleep $timeout && kill -USR1 $$; } & tpid=$!
wait $pid
stat=$?
kill -TERM $tpid 2>/dev/null
return $stat
}
{ sleep 10; exit 42; } &
pid=$!
wait_with_timeout $pid 5 # will time out
echo $?
wait_with_timeout $pid 10 # won't time out
echo $?
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU [email protected] http://tiswww.cwru.edu/~chet/
