Shell Programming and Scripting

#!/bin/bash
#Written by Matthew Headlee 20170208

#Send all output to null, comment out for debugging.
exec &> /dev/null

#Function eClementineGetState() checks current state of media playback
#returns 0 if media is playing, 1 if paused, 2 if stopped, 3 if not running
eClementineGetState() {
    iClemPID=$(pgrep -x clementine)
    if [ ! -z "${iClemPID}" ]; then
        for sFileDes in $(find /proc/${iClemPID}/fd -type l); do
            if file -bi "$(readlink -f ${sFileDes})" | awk '!/video|audio/ {exit 1}'; then
                #echo "Playing or Paused."
                echo "Media File Handle is ${sFileDes}"

                sFileDesInfo="/proc/${iClemPID}/fdinfo/$(basename ${sFileDes})"
                iFilePosA=$(awk '/pos:/ {print $2}' "${sFileDesInfo}")
                sleep .1
                iFilePosB=$(awk '/pos:/ {print $2}' "${sFileDesInfo}")
                if [ "${iFilePosA}" -ne "${iFilePosB}" ]; then
                    echo "Playing."
                    return 0
                fi

                echo "Paused."
                return 1
            fi
        done
        echo "Stopped."
        return 2
    fi
    echo "Media Player Not Found."
    return 3
}

eClementineGetState
[ "${?}" -eq 1 ] && clementine --play