Run a command, and then watch a folder and re-run whenever folder contents change - kind of poor mans inotify

folderwatch.sh

#!/bin/sh

#
# Usage: ./folderwatch.sh /folder/to/watch cmdtorun
#

check() {
    dir="$1"
    cmd="$2";
    chsum1=`find $dir -type f -exec md5sum {} + | md5sum | awk '{print $1}'`
    chsum2=$chsum1

    while [ "$chsum1" = "$chsum2" ]
    do 
        sleep 10
        chsum2=`find $dir -type f -exec md5sum {} + | md5sum | awk '{print $1}'`
    done

    $cmd

    check "$@"
}

$2
check "$@"