#!/bin/sh
#
# Script to ensure USB Audio device is hotplugable.
#

#
# Default sound device
#
# $DEFAULT = the card number of your default device ('cat /proc/asound/cards')
# $DEFAULT_NAME = the name of your default device (from /etc/asound.conf)
#
DEFAULT=0
DEFAULT_NAME="hda-intel"

#
# USB sound device
#
# $USB_AUDIO = the card number of your usb device ('cat /proc/asound/cards')
# $USB_AUDIO_NAME = the name of your usb device (from /etc/asound.conf)
#
USB_AUDIO=1
USB_AUDIO_NAME="usb-audio"

#
# Where are your user home directories? This variable will allow script to write
# to /$DIR/$USER/.asoundrc
#
DIRS=`ls /home`

# If USB-Audio card does not exist, this will be an empty value
# thus defaulting to Intel HDA
CARD_EXISTS=`grep -o -e 'USB-Audio' < /proc/asound/cards`

CARD=${DEFAULT}
if [ "${CARD_EXISTS}" == "USB-Audio" ] ; then
        CARD=${USB_AUDIO}
fi

if [ "${CARD}" == "${DEFAULT}" ] ; then
        DEVICE_NAME="${DEFAULT_NAME}"
else
        DEVICE_NAME="${USB_AUDIO_NAME}"
fi

# Write to user's .asoundrc file
for userdir in ${DIRS} ; do
cat<<EOF > /home/${userdir}/.asoundrc
pcm.!default {
        type plug
        slave.pcm "${DEVICE_NAME}"
}

ctl.!default {
        type plug
        slave.pcm "${DEVICE_NAME}"
}
EOF
done

# Write to user's .openalrc file
for userdir in ${DIRS} ; do
cat<<EOF > /home/${userdir}/.openalrc
(define devices '(alsa))
(define alsa-out-device "hw:${CARD},0")
EOF
done

fi
exit