#!/bin/bash
[ "${FLOCKER}" != "$0" ] && exec env FLOCKER="$0" flock -oe "$0" "$0" "$@"

LOCKDIR=/var/run/user/$UID/transcode_my_files

mkdir -p "${LOCKDIR}"

filename="${1}"
maxjobs=3
sleeptime=2
while true; do
    for i in $(seq $maxjobs); do
        lockfile="${LOCKDIR}/job_${i}"
        if ! test -e "${lockfile}"; then
            touch "${lockfile}" || exit 1
            sh -c "sleep 10; echo done:${filename}; rm '$lockfile'" &
            #flock -u "$0"
            exit 0
        fi
    done
    sleep $sleeptime
done