Time::Limit sends the process a SIGTERM, which you can catch.The following exits with a zero exit code after 5 seconds:

use Time::Limit -quiet, '5';

$SIG{TERM} = sub { exit 0 };

while(1) {}

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In reply to Re^3: Self terminating a script after a specified time by Anonymous Monk
in thread Self terminating a script after a specified time by shardservant

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