Hier is der alsa start-script aus /etc/init.d/alsasound
#!/sbin/runscript
# $Header: /var/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsasound,v 1.16 2004/08/30 03:29:39 pyrania 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 <perex@suse.cz>
#
#
# 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 <johnm@gentoo.org>
# July 29, 2003
# Rewritten for better support for built-in drivers
# Jeremy Huddleston <eradicator@gentoo.org>
# 2004.06.02
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
}
load_modules() {
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-}
TMP=${TMP##snd_}
[ -x "${alsascrdir}/${TMP}" ] && ${alsascrdir}/${TMP}
done
[ ! -d /proc/asound ] && eerror "ERROR: Failed to load necessary drivers"
}
unload_modules() {
LOADED_MODULES="$(/sbin/lsmod | grep -E "^snd" | awk '{print $1}')"
for MODULE in ${LOADED_MODULES}
do
/sbin/rmmod ${MODULE} >& /dev/null
done
/sbin/rmmod soundcore >& /dev/null
/sbin/rmmod gameport >& /dev/null
# Return success if the modules are unloaded
test -z "$(/sbin/lsmod | grep -E "^snd" | awk '{print $1}')"
}
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/* /dev/sound/* /dev/snd/*"
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
}
restore_mixer() {
if [ ! -r $asoundcfg ]; then
ewarn "No mixer config in $asoundcfg, you have to unmute your card!"
return 1
elif [ -x $alsactl ]; then
CARDS="$(cat /proc/asound/cards | awk '/: / { print $1 }')"
for CARDNUM in ${CARDS}
do
[ -e /dev/snd/controlC0 ] || sleep 2
[ -e /dev/snd/controlC0 ] || sleep 2
[ -e /dev/snd/controlC0 ] || sleep 2
[ -e /dev/snd/controlC0 ] || sleep 2
$alsactl -f $asoundcfg restore ${CARDNUM}
done
else
eerror -e "ERROR: Cannot find alsactl, did you forget to install media-sound/alsa-utils?"
return 1
fi
return 0
}
save_mixer() {
if [ -x $alsactl ]; then
$alsactl -f $asoundcfg store
else
eerror -e "ERROR: Cannot find alsactl, did you forget to install media-sound/alsa-utils?"
return 1
fi
return 0
}
start() {
if [ -d /proc/asound ] && [ -z "$(grep ' no soundcards ' /proc/asound/cards)" ] ; then
ebegin "ALSA Detected"
else
ebegin "Loading ALSA drivers"
load_modules
fi
einfo "Restoring Mixer Levels"
restore_mixer
eend 0
}
stop() {
if [ ! -d /proc/asound ] ; then
eerror "ALSA is not loaded"
return 0
fi
ebegin "Unloading ALSA"
terminate
if [ "${SAVE_ON_STOP}" = "yes" ]; then
einfo "Storing ALSA Mixer Levels"
if ! save_mixer; then
eend 1
fi
fi
einfo "Unloading modules"
if ! unload_modules; then
eend 1
fi
eend 0
}