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 $line
  54       ok
  55     done
  56   if [ -n "$OLDLOGLEV" ]; then
  57         /sbin/loglevel "$OLDLOGLEV"
  58   fi
  59   #
  60   # restore driver settings
  61   #
  62   if [ -x $alsactl ]; then
  63     $alsactl restore
  64   else
  65     show "ERROR: alsactl not found"; fail
  66   fi
  67 }
  68
  69 detect_stop()
  70 {
  71   #
  72   # remove all sound modules
  73   #
  74   /sbin/lsmod | awk '/^snd/ { print $0 }' | while read line; do \
  75      /sbin/rmmod `echo $line | cut -d ' ' -f 1`; \
  76   done
  77 }
  78
  79 driver_stop()
  80 {
  81   #
  82   # store driver settings
  83   #
  84   if [ -x $alsactl ]; then
  85     $alsactl store
  86   else
  87     show '!!!alsactl not found!!!'; fail
  88   fi
  89   #
  90   # remove all sound modules
  91   #
  92   detect_stop
  93 }
  94
  95 detect_start()
  96 {
  97   #
  98   # run only detect module
  99   #
 100   /sbin/modprobe snd-detect
 101 }
 102
 103 # See how we were called.
 104 case "$1" in
 105   start)
 106         # Start driver.
 107         if [ ! -d /proc/asound ]; then
 108           driver_start
 109           if [ -d /proc/asound ] && [ -d /var/lock/subsys ]; then
 110             touch /var/lock/subsys/alsasound
 111           fi
 112         else
 113           if [ -f /proc/asound/detect ]; then
 114             show "Shutting down sound detect module:"
 115             detect_stop
 116             ok
 117             driver_start
 118             if [ -d /proc/asound ] && [ -d /var/lock/subsys ]; then
 119               touch /var/lock/subsys/alsasound
 120             fi
 121           else
 122             show "ALSA driver is already running"; fail
 123           fi
 124         fi
 125         ;;
 126   stop)
 127         # Stop daemons.
 128         if [ -d /proc/asound ]; then
 129           show "Shutting down sound driver:"
 130           busy
 131           if [ -f /proc/asound/detect ]; then
 132             detect_stop
 133           else
 134             driver_stop
 135           fi
 136           (rmmod isapnp; rmmod soundcore) 2> /dev/null
 137           if [ -d /var/lock/subsys ]; then
 138             rm -f /var/lock/subsys/alsasound
 139           fi
 140           ok
 141         else
 142           show "ALSA driver isn't running "; fail
 143         fi
 144         ;;
 145   restart)
 146         $0 stop
 147         $0 start
 148         ;;
 149   detect)
 150         # Start driver only in detect mode.
 151         if [ -d /proc/asound ]; then
 152           if [ -f /proc/asound/detect ]; then
 153             show "ALSA is already running detection mode"; fail
 154             exit 0
 155           else
 156             show "Shutting down sound driver:"
 157             driver_stop
 158             ok
 159           fi
 160         fi
 161         show "Starting sound detect module:"
 162         detect_start
 163         ok
 164         if [ -d /var/lock/subsys ]; then
 165           touch /var/lock/subsys/alsasound
 166         fi
 167         ;;
 168   *)
 169         echo "Usage: $0 {start|stop|restart|detect}"
 170         exit 1
 171 esac
 172
 173 exit 0