#!/bin/sh
 
# Written by Nick Welch <nick@incise.org>.  Author disclaims copyright.
 
# WaitFor: block until all process(es) matching the specified pids/names have
# completed.  good for firefox, which can take a while to fully exit, even
# after its windows have disappeared.
 
# pass in one or more arguments, each being either a numerical pid or the name
# of a process
 
is_numeric () { echo $1 | egrep -q '^[0-9]+$'; }
 
while true
do
    numalive=0
    # can pass in pids and/or process names
    for arg in $*
    do
        if is_numeric "$arg"
        then
            pids=$arg
        else
            pids=`pidof $arg`
        fi
        for pid in $pids
        do
            numalive=$(($numalive + `ps -p $pid | grep -v '^ ' | wc -l`))
        done
    done
    if [ $numalive = 0 ]
    then
        exit
    fi
    sleep 0.1
done