mpdのプレイリストを再生します。 irexecから実行するために作りました。

mpd_select_playlist.sh

#!/bin/sh
case $1 in
    !!!\ locked\ !!!)
	shift
    ;;
    *)
	case $1 in
	    [-+] | forward | backward | [1-9] | [1-9][0-9])
	    ;;
	    *)
		exec 1>&2
		cat <<EOF
Usage: ${0##*/} + | - | forward | backward | NUM
       + or forward : next playlist
       - or backward : prev playlist
       NUM	     : playlist number
EOF
		exit 1
	    ;;
	esac
	exec flock "/tmp/!!! ${0##*/}.lock" $0 '!!! locked !!!' "$@"
    ;;
esac

mpd()
{
    echo "$@" |nc localhost 6600 2>/dev/null
}

rev()
{
    local a
    a=$1
    shift
    [ $# -gt 0 ] && rev "$@"
    echo $a
}

play_playlist()
{
    mpc stop >/dev/null 2>&1
    mpc clear >/dev/null 2>&1
    mpc load $1
    mpc play >/dev/null 2>&1
}

get_playlists()
{
    mpd listplaylists |sed -e '/playlist:/!d' -e 's/playlist: *//'
}


current=$(mpd playlistinfo|grep file: | md5sum)

case $1 in
    [1-9] | 1[0-2])
	set -- $1 $(get_playlists)
	shift $1
	[ -n "$1" ] && play_playlist $1
	exit
    ;;
    + | forward)
	set -- $(get_playlists)
    ;;
    - | backward)
	set -- $(rev $(get_playlists))
    ;;
esac

found=no
for pl in "$@"; do
    case ${found} in
	yes)
	    set -- $pl
	    break
	;;
    esac
    if [ "$(mpd listplaylist "$pl" |grep file:| md5sum)" = "${current}" ]; then
	found=yes
    fi
done

play_playlist $1