Show song info from internet radio in pop up using mplayer and notify-send

gistfile1.sh

#!/bin/sh
# Show song info from internet radio in pop up window.
#
# Copyright (c) 2012 Tomáš Ehrlich <tomas.ehrlich@gmail.com>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.

radio="http://www.radioparadise.com/musiclinks/rp_192.m3u"

config_dir=~/.rp
fifo=$config_dir/fifo
image_file=$config_dir/image
log_file=$config_dir/log

radio_urls=$(wget $radio -q -O - | head)

if [ ! -d $config_dir ]; then
    mkdir $config_dir
fi

if [ ! -p $fifo ]; then
    mkfifo $fifo
fi

trap "rm -f $fifo" INT TERM EXIT

mplayer $radio_urls 2>/dev/null | stdbuf -o L grep ICY > $fifo &

while read line < $fifo; do
    args=$(echo $line | sed -r "s/ICY Info: StreamTitle='([^-]*) - ([^']*)';StreamUrl='([^']*)';/\1;\2;\3/")
    saveIFS=$IFS; IFS=";"; set -- $args; IFS=$saveIFS

    wget -q $3 -O $image_file 2>/dev/null
    notify-send -i $image_file "$1" "$2" 2>/dev/null
    echo $(date +%D) $1 - $2 >> $log_file
done

wait