alsasound

   1 #!/bin/sh
   2 #
   3 # alsasound     This shell script takes care of starting and stopping
   4 #               ALSA sound driver.
   5 #
   6 # This script requires /usr/sbin/alsactl program from alsa-utils package.
   7 #
   8 # Copyright (c) by Jaroslav Kysela <perex@jcu.cz>
   9 #
  10 #  This program is free software; you can redistribute it and/or modify
  11 #  it under the terms of the GNU General Public License as published by
  12 #  the Free Software Foundation; either version 2 of the License, or
  13 #  (at your option) any later version.
  14 #
  15 #  This program is distributed in the hope that it will be useful,
  16 #  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 #  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 #  GNU General Public License for more details.
  19 #
  20 #  You should have received a copy of the GNU General Public License
  21 #  along with this program; if not, write to the Free Software
  22 #  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 #
  24 #
  25 # For Polish Linux Distribution:
  26 # chkconfig: 2345 87 14
  27 # description: ALSA driver
  28 #
  29
  30 # Source function library.
  31 . /etc/rc.d/init.d/functions
  32
  33 alsactl=/usr/sbin/alsactl
  34
  35 if [ -r /etc/modules.conf ]; then
  36 MODULES_CONF=/etc/modules.conf
  37 else
  38 MODULES_CONF=/etc/conf.modules
  39 fi
  40
  41 driver_start()
  42 {
  43   #
  44   # insert all sound modules
  45   #
  46   if OLDLOGLEV=$(awk '{print $1}' < /proc/sys/kernel/printk 2> /dev/null); then
  47         /sbin/loglevel 1
  48   fi
  49   awk '$1 == "alias" && $3 != "off" && ($2 ~ /^snd-card-[0-9]$/ || $2 ~ /^sound-service-[0-9]-[0-9]+$/) {print $2}' < $MODULES_CONF | \
  50     while read line; do \
  51       show "Starting sound driver: $line"
  52       busy
  53       /sbin/modprobe $line
  54       ok
  55     done
  56   #
  57   # set (non-)blocking state of pcm devices
  58   #
  59   for card in /proc/asound/[0-9]; do
  60     card=`echo $card | awk '{ sub(/^.*\//, ""); print $0 }'`
  61     for dev in /proc/asound/$card/pcmD[0-9]o; do
  62       dev=`echo $dev | awk '{ sub(/^.*pcmD/, ""); sub(/o$/, ""); print $0 }'`
  63       show "Setting up blocking state for card $card device $dev"
  64       busy
  65       echo "Playback erase" > /proc/asound/$card/pcmD${dev}o
  66       echo "Capture erase" > /proc/asound/$card/pcmD${dev}o
  67       awk -v CARD=$card '($1 ~ CARD || $1 ~ /\*/) { $1 = ""; sub(/^ /, ""); print $0}' < /etc/sysconfig/alsa-oss-pcm > /proc/asound/$card/pcmD${dev}o
  68       ok
  69     done
  70   done
  71   if [ -n "$OLDLOGLEV" ]; then
  72         /sbin/loglevel "$OLDLOGLEV"
  73   fi
  74   #
  75   # restore driver settings
  76   #
  77   if [ -x $alsactl ]; then
  78     $alsactl restore
  79   else
  80     show "ERROR: alsactl not found"; fail
  81   fi
  82 }
  83
  84 detect_stop()
  85 {
  86   #
  87   # remove all sound modules
  88   #
  89   /sbin/lsmod | awk '/^snd/ { print $0 }' | while read line; do \
  90      /sbin/rmmod `echo $line | cut -d ' ' -f 1`; \
  91   done
  92 }
  93
  94 driver_stop()
  95 {
  96   #
  97   # store driver settings
  98   #
  99   if [ -x $alsactl ]; then
 100     $alsactl store
 101   else
 102     show '!!!alsactl not found!!!'; fail
 103   fi
 104   #
 105   # remove all sound modules
 106   #
 107   detect_stop
 108 }
 109
 110 detect_start()
 111 {
 112   #
 113   # run only detect module
 114   #
 115   /sbin/modprobe snd-detect
 116 }
 117
 118 # See how we were called.
 119 case "$1" in
 120   start)
 121         # Start driver.
 122         if [ ! -d /proc/asound ]; then
 123           driver_start
 124           if [ -d /proc/asound ] && [ -d /var/lock/subsys ]; then
 125             touch /var/lock/subsys/alsasound
 126           fi
 127         else
 128           if [ -f /proc/asound/detect ]; then
 129             show "Shutting down sound detect module:"
 130             detect_stop
 131             ok
 132             driver_start
 133             if [ -d /proc/asound ] && [ -d /var/lock/subsys ]; then
 134               touch /var/lock/subsys/alsasound
 135             fi
 136           else
 137             show "ALSA driver is already running"; fail
 138           fi
 139         fi
 140         ;;
 141   stop)
 142         # Stop daemons.
 143         if [ -d /proc/asound ]; then
 144           show "Shutting down sound driver:"
 145           busy
 146           if [ -f /proc/asound/detect ]; then
 147             detect_stop
 148           else
 149             driver_stop
 150           fi
 151           (rmmod isapnp; rmmod soundcore) 2> /dev/null
 152           if [ -d /var/lock/subsys ]; then
 153             rm -f /var/lock/subsys/alsasound
 154           fi
 155           ok
 156         else
 157           show "ALSA driver isn't running "; fail
 158         fi
 159         ;;
 160   restart)
 161         $0 stop
 162         $0 start
 163         ;;
 164   detect)
 165         # Start driver only in detect mode.
 166         if [ -d /proc/asound ]; then
 167           if [ -f /proc/asound/detect ]; then
 168             show "ALSA is already running detection mode"; fail
 169             exit 0
 170           else
 171             show "Shutting down sound driver:"
 172             driver_stop
 173             ok
 174           fi
 175         fi
 176         show "Starting sound detect module:"
 177         detect_start
 178         ok
 179         if [ -d /var/lock/subsys ]; then
 180           touch /var/lock/subsys/alsasound
 181         fi
 182         ;;
 183   *)
 184         echo "Usage: $0 {start|stop|restart|detect}"
 185         exit 1
 186 esac
 187
 188 exit 0