npr script

#!/bin/bash

name=$(basename "$0")
url="http://npr.ic.llnwd.net/stream/npr_live24"
lock=$(pgrep -u "$(id -u)" -xf "mpg123 $url")

if [[ "$#" = "1" && "$1" = "play" ]]
then

        if [ -n "$lock"  ]
        then
                echo NPR is already playing.
                exit 1
        else
                nohup mpg123 $url >/dev/null 2>&1 &
                echo NPR start playing.
        fi
elif [[ "$#" = "1" && "$1" = "stop" ]]
then
        if [ -n "$lock"  ]
        then
                pkill -u "$(id -u)" -xf "mpg123 $url"
                echo NPR stopped.
        else
                echo NPR is already stopped.
                exit 1
        fi
else
        echo "Usage: $name play | stop"
        exit 1
fi

exit 0