alsasound init script

alsasound (text/plain), 5.15 KB, created by Jeremy Huddleston (RETIRED) on 2004-02-18 10:51:59 UTC

#!/sbin/runscript
# $Header: /home/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsasound,v 1.9 2004/02/12 12:20:01 eradicator Exp $
#
# Gentoo users: add this script to 'boot' run level.
# ==================================================
#
# alsasound     	This shell script takes care of starting and stopping
#               	the ALSA sound driver.
#
# This script requires /usr/sbin/alsactl and /usr/bin/aconnect programs
# from the alsa-utils package.
#
# Copyright (c) by Jaroslav Kysela <[e-mail]> 
#
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

#	Edited to support Linux kernel 2.5 and above as well as 2.4
#	John Mylchreest <[e-mail]>
#	July 29, 2003 

alsactl=/usr/sbin/alsactl
asoundcfg=/etc/asound.state
aconnect=/usr/bin/aconnect
alsascrdir=/etc/alsa.d

depend() {
	need bootmisc localmount
	before modules
	after isapnp
	provide alsa-modules
}

start() {
	if [ -d /proc/asound ] && [ -z "$(grep ' no soundcards ' /proc/asound/cards)" ] ; then
		ebegin "ALSA Detected"
	else
		ebegin "Loading ALSA drivers"
		
		DRIVERS="$(modprobe -c | grep -E "^[[:space:]]*alias[[:space:]]+snd-card-[[:digit:]]" | awk '{print $3}')"

		if modprobe -c | grep -q "snd.*oss$" ; then
			# Test for use of OSS
			einfo "Using ALSA OSS emulation"
			OSS="$(modprobe -l | grep "snd.*oss" | sed -e "s:\/.*\/::" -e "s:\..*::")"
			# Add oss modules to list
			for i in ${OSS}
			do
				DRIVERS="${i} ${DRIVERS}"
			done
		fi
		
		# Fall back on the automated aliases if we don't have ALSA configured properly...
		if [ -z "${DRIVERS}" ]; then
			ewarn "Could not detect custom ALSA settings.  Loading all detected alsa drivers."
			DRIVERS="$(modprobe -c | grep pci: |  awk '{ print $3 }' | grep snd.* | sort | uniq)"
		fi

		[ -z "${DRIVERS}" ] && eerror "Unable to find any ALSA drivers. Have you compiled alsa-drivers correctly?"

		for DRIVER in ${DRIVERS}
		do
			if [ ! "${DRIVER}" = off ] &&
			   [ -z `cut -d' ' -f1 /proc/modules | egrep "^${DRIVER}\$"` ] &&
			   [ -z `cut -d' ' -f1 /proc/modules | egrep "^${DRIVER//-/_}\$"` ]; then
				einfo "Loading: ${DRIVER}"
				/sbin/modprobe ${DRIVER}
			fi
		done
		
		sleep 1

		if [ -f /proc/asound/seq/drivers ] ; then
			# We want to ensure snd-seq is loaded as it is needed for things like timidity even if
			# we don't use a real sequencer.
			SEQUENCERS="snd-seq $(awk -F, '$2~/^empty$/ {print $1}' /proc/asound/seq/drivers)"
			for SEQUENCER in ${SEQUENCERS}
			do
				if [ -z `cut -d' ' -f1 /proc/modules | egrep "^${SEQUENCER}\$"` ] &&
				   [ -z `cut -d' ' -f1 /proc/modules | egrep "^${SEQUENCER//-/_}\$"` ]; then
					einfo "Loading: ${SEQUENCER}"
					[ -n "${SEQUENCER}" ] && /sbin/modprobe ${SEQUENCER}
				fi
			done
		fi
		
		einfo "Running card-dependent scripts"
		for DRIVER in ${DRIVERS}
		do
			TMP=${DRIVER##snd-}
			[ -x "${alsascrdir}/${TMP}" ] && ${alsascrdir}/${TMP}
		done
		
		[ ! -d /proc/asound ] && eerror "ERROR: Failed to load necessary drivers"
	fi
	
	einfo "Restoring Mixer Levels"
	if [ ! -r $asoundcfg ]; then
		ewarn "No mixer config in $asoundcfg, you have to unmute your card!"
		eend 1
	elif [ -x $alsactl ]; then
		CARDS="$(cat /proc/asound/cards | awk '/: / { print $1 }')"
		for CARDNUM in ${CARDS}
		do
			$alsactl -f $asoundcfg restore ${CARDNUM}
		done
	else
		eerror -e "ERROR: Cannot find alsactl, did you forget to install media-sound/alsa-utils?"
		eend 1
	fi
	eend 0
}

stop() {
	if [ ! -d /proc/asound ] ; then
		eerror "ALSA is not loaded"
		return 0
	fi
	
	ebegin "Unloading ALSA"
	terminate
	einfo "Storing ALSA Mixer Levels"
	if [ -x $alsactl ]; then
		$alsactl -f $asoundcfg store
	else
		eerror -e "ERROR: Cannot find alsactl, did you forget to install media-sound/alsa-utils?"
		eend 1
	fi

	LOADED_MODULES="$(/sbin/lsmod | grep -E "^snd" | awk '{print $1}')"
	einfo "Unloading modules"
	for MODULE in ${LOADED_MODULES}
	do
		/sbin/rmmod ${MODULE} 2> /dev/null
	done
	/sbin/rmmod soundcore 2> /dev/null
	/sbin/rmmod gameport 2> /dev/null	
	eend 0
}

terminate() {
	#
	# Kill processes holding open sound devices
	#
	# DEVS=`find /dev/ -follow -type c -maxdepth 1 -print 2>/dev/null | xargs ls -dils | grep "1*1[46]," | cut -d: -f2 | cut -d" " -f2; echo /proc/asound/dev/*`
	ossdevs="/dev/admmidi? /dev/adsp? /dev/amidi? /dev/audio* /dev/dmfm* \
			/dev/dmmidi? /dev/dsp* /dev/dspW* /dev/midi0? /dev/mixer? /dev/music \
			/dev/patmgr? /dev/sequencer* /dev/sndstat"
	alsadevs="/proc/asound/dev/*"
	fuser -k $ossdevs $alsadevs 2> /dev/null 1>/dev/null
	
	#
	# remove all sequencer connections if any
	#
	[ -f /proc/asound/seq/clients -a -x $aconnect ] && $aconnect --removeall
}