dialog(1)-based audio device selection for FreeBSD

au-select.sh

#!/bin/sh

: ${DIALOG_CANCEL=1}

IFS="
"
UNITS=""
for dev in $(cat /dev/sndstat | fgrep '(play'); do
    unit=$(echo $dev | sed s/^pcm// | sed 's/:.*//')
    description=$(echo $dev | sed 's/.*<//' | sed 's/>.*//')
    UNITS="$UNITS $unit \"$description\""
done
CURRENT=$(sysctl -n hw.snd.default_unit)

exec 3>&1
SELECTION=`echo "${UNITS}" | xargs dialog --menu "Select audio device" 20 40 10 2>&1 1>&3`
if [ $? -eq $DIALOG_CANCEL ]; then exit 1; fi
exec 3>&-

if [ "${SELECTION}" != "${CURRENT}" ]; then
    sysctl -q hw.snd.default_unit=${SELECTION} 2>&1 > /dev/null
fi