Try: 
use POSIX ":sys_wait_h";

waitpid(-1,WNOHANG);

[download]
to check for any waiting processes, and return immediately instead of blocking if there aren't any.

Or, use a handler for $SIG{CHLD} to do your thing, and handle processes exiting as they come in.

In reply to Re^3: Waiting For Multiple Programs to Complete by sgifford
in thread Waiting For Multiple Programs to Complete by NathanE

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