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=$(cat /proc/sys/kernel/printk | awk '{print $1}' 2> /dev/null); then
  47         /sbin/loglevel 1
  48   fi
  49   cat $MODULES_CONF | grep -v "off" | \
  50     grep -E "^alias.+snd-card-[[:digit:]]" | \
  51     awk '{print $3}' | \
  52     while read line; do \
  53       show "Starting sound driver: $line " ; \
  54       /sbin/modprobe $line; \
  55       ok; \
  56     done
  57   if [ -n "$OLDLOGLEV" ]; then
  58         /sbin/loglevel "$OLDLOGLEV"
  59   fi
  60   #
  61   # restore driver settings
  62   #
  63   if [ -x $alsactl ]; then
  64     $alsactl restore
  65   else
  66     show "ERROR: alsactl not found"; fail
  67   fi
  68 }
  69
  70 detect_stop()
  71 {
  72   #
  73   # remove all sound modules
  74   #
  75   /sbin/lsmod | grep -E "^snd" | while read line; do \
  76      /sbin/rmmod `echo $line | cut -d ' ' -f 1`; \
  77   done
  78 }
  79
  80 driver_stop()
  81 {
  82   #
  83   # store driver settings
  84   #
  85   if [ -x $alsactl ]; then
  86     $alsactl store
  87   else
  88     show '!!!alsactl not found!!!'; fail
  89   fi
  90   #
  91   # remove all sound modules
  92   #
  93   detect_stop
  94 }
  95
  96 detect_start()
  97 {
  98   #
  99   # run only detect module
 100   #
 101   /sbin/modprobe snd-detect
 102 }
 103
 104 # See how we were called.
 105 case "$1" in
 106   start)
 107         # Start driver.
 108         if [ ! -d /proc/asound ]; then
 109           driver_start
 110           if [ -d /proc/asound ] && [ -d /var/lock/subsys ]; then
 111             touch /var/lock/subsys/alsasound
 112           fi
 113         else
 114           if [ -f /proc/asound/detect ]; then
 115             show "Shutting down sound detect module:"
 116             detect_stop
 117             ok
 118             driver_start
 119             if [ -d /proc/asound ] && [ -d /var/lock/subsys ]; then
 120               touch /var/lock/subsys/alsasound
 121             fi
 122           else
 123             show "ALSA driver is already running"; fail
 124           fi
 125         fi
 126         ;;
 127   stop)
 128         # Stop daemons.
 129         if [ -d /proc/asound ]; then
 130           show "Shutting down sound driver:"
 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