new /etc/init.d/mpd

mpd (text/plain), 2.42 KB, created by Zrajm C Akfohg on 2007-06-05 21:27:43 UTC

#!/sbin/runscript
# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/media-sound/mpd/files/mpd-0.12.rc6,v 1.3 2006/10/03 19:26:17 ticho Exp $

depend() {
	need alsasound localmount
	use netmount nfsmount esound pulseaudio
} 

# [2007-03-29, 21:11-01:36] - Zrajm C Akfohg modified this script so that it
# kills MPD. This works even when MPD has hanged (which, for some reason,
# happens to me quite frequently) while the traditional `mpd --kill' does not.

# Usage: pschildren PID
#
# Lists process numbers of the immediate children of PID. Returns false if if
# no children were found. /zrajm [2007-03-30]
pschildren() {
    awk -F/ '
        BEGIN { retval=1 }
        /^PPid:	'"$1"'$/ {
            retval=0
            $0=FILENAME
            print $3
            nextfile
        }
        END { exit retval }
    ' /proc/[0-9]*/status
    # Listing `/proc/scsi' (at least under some cirkumstances) never terminates
    # on my system, so to avoid hanging this script, look only for "status"
    # files which begins with a *number* (i.e. is a PID) above. /zrajm
    # [2007-05-22]
}

# Usage: pstree PID
#
# Lists process number of PID, and all its offspring processes.
# /zrajm [2007-03-30]
pstree() {
    local PID
    for PID in "$@"; do
        echo "$PID"
        pstree $(pschildren "$PID")
    done
}

checkconfig() {
	if ! [ -f /etc/mpd.conf ]; then
		eerror "Configuration file /etc/mpd.conf does not exist."
		return 1
	fi

	return 0
}

start() {
	checkconfig || return 1

	# You may set mpd's by setting "NICENESS" in `/etc/conf.d/mpd' (default: 0)
	# /zrajm [2007-06-04]
	local NICENESS="$(( ${NICENESS:-0} - $(nice) ))"
	ebegin "Starting Music Player Daemon" 
	nice --adjustment=$NICENESS /usr/bin/mpd --no-create-db /etc/mpd.conf
	eend $?
}

stop() {
	ebegin "Stopping Music Player Daemon"
	[[ -r /etc/mpd.conf ]] &&
		PIDFILE="$(awk -F'"' '/^ *pid_file/{ print $2; exit }' /etc/mpd.conf)"
	if [[ -r "$PIDFILE" ]]; then
		local PID KILLS="0"
		for PID in $(pstree "$(cat $PIDFILE)"); do
			[[ -d "/proc/$PID" ]] || continue
			einfo "  Killing MPD process $PID."
			kill $PID && ((KILLS++))
		done
		if (( KILLS > 1 )); then
			ewarn "NOTE: More than one MPD process was killed!"
			ewarn "  (This normally does not happen, and usually means that"
			ewarn "  the now stopped MPD instance was non-responsive/hanged.)"
		fi
	else
		/usr/bin/mpd --kill
	fi
	eend $? 
}