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#!/bin/bash
APP=`basename "$0"`
umask 002
shopt -s nullglob
function die()
{
[[ -n "$@" ]] && echo -e "$APP: $@" >&2
exit 1
}
function version
{
echo "$APP: audio switch control, version 0.1"
}
function usage
{
echo "Usage: $APP [OPTION]... COMMAND"
echo
echo "Options:"
echo " --quiet Do not complain on error"
echo " -v, --version Display version information"
echo " -h, --help This message"
echo
echo "Commands:"
echo " on Switch audio routing on"
echo " off Switch audio routing off"
#echo
# 01234567890123456789012345678901234567890123456789012345678901234567890123456789
}
# defaults
QUIET=0
# parse command line args
PROGRAMARGS=`getopt -n "$APP" -l device:,quiet,version,help vh "$@"`
[[ $? != 0 ]] && exit 1
eval set -- "$PROGRAMARGS"
while true; do
case "$1" in
--quiet) QUIET=1; shift;;
-v|--version) version; exit 0;;
-h|--help) usage; exit 0;;
--) shift; break;;
esac
done
# check other args
[[ -z "$1" ]] && die "you did not specify a command, see --help"
[[ -n "$2" ]] && die "too many arguments, see --help"
# work out command
COMMAND=
case "$1" in
on) COMMAND=1;;
off) COMMAND=0;;
*) die "invalid comand, see --help";;
esac
# detect audio switch
DEVICES=`grep -l edam /sys/bus/usb/devices/*/manufacturer | sed 's/\/[^\/]*$//'`
DEVICES=`for DIR in "$DEVICES"; do grep -li ba7f "$DIR"/idProduct; done | sed 's/\/[^\/]*$//'`
DEVICES=`for DIR in "$DEVICES"; do grep -li 03eb "$DIR"/idVendor; done | sed 's/\/[^\/]*$//'`
DEVICES=`for DIR in "$DEVICES"; do [[ -d "$DIR":1.0/tty ]] && echo "$DIR":1.0/tty/*; done | sed 's/^.*\///'`
TEMP=( $DEVICES )
[[ ${#TEMP[*]} -gt 1 ]] && die "more than one audio switch detetced, use --device"
DEVICE=$DEVICES
# no device?
[[ -z "$DEVICE" ]] && die "audio switch not found"
[[ -c /dev/"$DEVICE" ]] || die "audio switch device should be there, but isn't!"
# do command
echo $COMMAND > /dev/$DEVICE
|