Print pianobar song and artist in tab name on osx

config

# ~/.config/pianobar/config

user = user@example.com
password = very_secret

event_command = /Users/username/.config/pianobar/tabname.sh

tabname.sh

#!/bin/bash
# ~/.config/pianobar/tabname.sh

function tabname {
  printf "\e]1;$1\a"
}
fold="$HOME/.config/pianobar"
ctlf="$fold/ctl"
nowplaying="$fold/lyrics.sh"
while read L; do
        k="`echo "$L" | cut -d '=' -f 1`"
        v="`echo "$L" | cut -d '=' -f 2`"
        export "$k=$v"
done < <(grep -e '^\(title\|artist\|album\|stationName\|pRet\|pRetStr\|wRet\|wRetStr\|songDuration\|songPlayed\|rating\|songDuration\|songPlayed\|coverArt\|stationCount\|station[0-9]\+\)=' /dev/stdin)

case "$1" in
        songstart)
                tabname "P: $title by $artist"
;;
esac