You should be able to the reaping in a SIGCHLD handler, which upon exit, returns you to the sleep loop. Or include the reaping within the timing loop, eg 
while (1) {
    while (remaining) {
        sleep(remaining);
        while (($pid = wait) != -1) {
            ... do reaping stuff
        }
    }
    ... check for new jobs and spawn them ...
}

[download]

Dave.

In reply to Re^3: SIGCHLD and sleep() by dave_the_m
in thread SIGCHLD and sleep() by overbyte

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