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#
# A set of common functions used by alsa-base scripts.
# Copyright (c) 2000. Masato Taruishi. All rights reserved.
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
update_modutils_conf() {
if [ ! -f /etc/modutils/alsa ] || [ -L /etc/modutils/alsa ]; then
if [ ! /etc/alsa/modutils/$alsa_major_version -ef /etc/modutils/alsa ]; then
rm -f /etc/modutils/alsa
if [ -f /etc/alsa/modutils/$alsa_major_version ]; then
ln -s /etc/alsa/modutils/$alsa_major_version /etc/modutils/alsa
fi
/sbin/update-modules
elif [ ! -f /etc/alsa/modutils/$alsa_major_version ]; then
rm /etc/modutils/alsa
/sbin/update-modules
fi
fi
}
get_alsa_version() {
if [ ! -d /proc/asound ]; then
if ! modprobe snd 2> /dev/null; then
/sbin/update-modules > /dev/null 2>&1
if ! modprobe snd 2> /dev/null; then
alsa_version="none"
alsa_major_version="none"
return
fi
fi
load=1
fi
alsa_version=`cat /proc/asound/version | head -1 | cut -d' ' -f 7 | cut -d. -f -3`
alsa_major_version=`echo $alsa_version | cut -d. -f -2`
if [ "$load" = "1" ]; then
modprobe -r snd 2> /dev/null || true
fi
}
get_alsactl()
{
if [ -x /usr/sbin/alsactl ]; then
alsactl_major_version=`alsactl -v | cut -d' ' -f 3 | cut -d. -f-2`
if [ "$alsa_major_version" = "$alsactl_major_version" ]; then
alsactl=/usr/sbin/alsactl
fi
fi
if [ "x$alsactl" = "x" ] &&
[ -x "/usr/sbin/alsactl-$alsa_major_version" ]; then
alsactl=/usr/sbin/alsactl-$alsa_major_version
fi
}
get_sound_devs() {
sound_devs_dev=`find /dev -type c 2> /dev/null | xargs ls -l 2> /dev/null | awk -F' ' '{print $5,$10;}' | awk '/^14,/ || /^116,/ {printf "%s\n", $2;}'|sort|uniq|tr '\n' ' '`
}
get_sound_devs_proc() {
sound_devs_dev_proc=`find /proc/asound/dev -type c 2> /dev/null | xargs ls -l 2> /dev/null | awk -F' ' '{print $5,$10;}' | awk '/^14,/ || /^116,/ {printf "%s\n", $2;}'|sort|uniq|tr '\n' ' '`
}
get_procs_using_sound_devs() {
procs_using_sound_devs=`echo $sound_devs_dev $sound_devs_dev_proc | xargs fuser 2> /dev/null | awk -F' ' '{print $2}'|sort|uniq|tr '\n' ' '`
}
kill_procs_using_sound_devs() {
get_procs_using_sound_devs
if [ -n "$procs_using_sound_devs" ]; then # There are procs to kill
sleep 1 # Wait a sec: they might release the device
get_procs_using_sound_devs
if [ -n "$procs_using_sound_devs" ]; then # There are still procs to kill
echo -n "but first, terminating (SIGTERM) pid ${procs_using_sound_devs}"
kill -TERM $procs_using_sound_devs >> /dev/null
echo -n "."
sleep 1
echo -n "."
sleep 1
echo -n ". "
get_procs_using_sound_devs
if [ -n "$procs_using_sound_devs" ]; then # There are still procs to kill
echo -n "and killing (SIGKILL) pid ${procs_using_sound_devs}... "
kill -KILL $procs_using_sound_devs >> /dev/null
fi
fi
fi
}
# kill -STOPing processes using sound devicces.
stop_procs_using_sound_devs() {
get_procs_using_sound_devs
if [ -n "$procs_using_sound_devs" ] && [ ! -f /var/lib/alsa-base/alsa-suspend-list ]; then
procs_using_sound_devs=`ps --no-headers $procs_using_sound_devs | awk -F' ' '$3 ~ /[^T]/ { print $1;}'`
for proc in $procs_using_sound_devs
do
kill -STOP $proc >> /dev/null && echo -n " $proc" >> /var/lib/alsa-base/alsa-suspend-list
done
chmod 600 /var/lib/alsa-base/alsa-suspend-list
fi
}
# kill -CONTing processes using sound devicces.
cont_procs_using_sound_devs() {
if [ -O /var/lib/alsa-base/alsa-suspend-list ]; then
for proc in `cat /var/lib/alsa-base/alsa-suspend-list`
do
kill -CONT $proc >> /dev/null || true
done
fi
rm -f /var/lib/alsa-base/alsa-suspend-list
}
disable_sound_devs() {
if [ -z "$ALSA_KEEP_DEV_PERMS" ]; then
for file in $sound_devs_dev; do
if [ -e $file ]; then
perm=`perl -e "printf \"%04o\", (stat(\"$file\"))[2] & 07777;"`
install -d /var/lib/alsa-base/`dirname $file`
test -e /var/lib/alsa-base/$file || echo $perm > /var/lib/alsa-base/$file
chmod 000 $file
fi
done
fi
}
enable_sound_devs() {
if [ -z "$ALSA_KEEP_DEV_PERMS" ]; then
for file in $sound_devs_dev; do
if [ -O /var/lib/alsa-base/$file ] && [ -e $file ]; then
perm=`cat /var/lib/alsa-base/$file`
rm /var/lib/alsa-base/$file
chmod $perm $file
fi
done
fi
}
disable_esd() {
esduser=`ps -o %U --no-heading -C esd` || return 0
[ -n "$esduser" ] && (echo -n 'muting esd ... ' && su $esduser --command='esdctl standby standbymode') | logger -t $0
}
enable_esd() {
esduser=`ps -o %U --no-heading -C esd` || return 0
[ -n "$esduser" ] && (echo -n 'unmuting esd ... ' && su $esduser --command='esdctl resume standbymode') | logger -t $0
}
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