#!/bin/bash

main()
{
    #  Process arguments
    [ $# = 1 -a -x "$1" ] || usage
    SCRIPT=$1
    
    #  Sanity checks and derivations
    PATH=$PATH:.

    #  Guts
    I=0
    while :; do
        ((I++))
        $SCRIPT >/dev/null &
        PID=$!
        sleep 3
        if [ -d /proc/$PID ]; then
            echo "$SCRIPT (pid $PID) hung on ${I}th attempt; children dump follows ..."
            kill -USR1 $PID
            break
        fi
    done
}

usage()
{
    echo "Usage: ${0##*/} <script>" >&2
    exit 1
}

main "$@"