#!/bin/sh

# RESTORE_SOUND=yes

# Forcefully kill and restart applications using the sound card.
# This possibility is available for sound drivers that don't properly handle
# suspending. 

. "${PM_FUNCTIONS}"

SOUND_RUN=/var/run/pm-soundprogs

stop_sound() {
    rm -rf $SOUND_RUN
    if [ -c /dev/sndstat ] ; then
        for n in `cat /dev/sndstat 2>/dev/null|grep Open\ by|awk {'print $3'}|uniq`; do
            SOUNDPID=`echo $n|awk -F / {'print $1'}`
            SOUNDPROG=`ps -p $SOUNDPID -o args=`
            SOUNDUSER=`ls -ld /proc/$SOUNDPID |awk {'print $3'}`
            SOUNDDISPLAY=`perl -e 's/\000/\n/g;' -p /proc/$SOUNDPID/environ|grep ^DISPLAY=|cut -d= -f2-`

            kill $SOUNDPID
            ps "$SOUNDPID" &>/dev/null && kill -9 $SOUNDPID
            logger \
            "pm-utils: Program $SOUNDPROG ($SOUNDPID) of user $SOUNDUSER on display $SOUNDDISPLAY terminated."	    
        done
    fi

    for n in `lsof -n|grep /dev|egrep ' (14|116),'|sed -e 's/ \+/|/g'|cut '-d|' -f1-3`; do
        SOUNDPID=`echo $n |cut '-d|' -f2`
        SOUNDPROG=`ps -p $SOUNDPID -o args=`
        SOUNDUSER=`echo $n |cut '-d|' -f3`
        if [ -f $SOUND_RUN ] && grep -q "$SOUNDPROG.*$SOUNDUSER.*" $SOUND_RUN;then
            continue;
        fi
        SOUNDDISPLAY=`perl -e 's/\000/\n/g;' -p /proc/$SOUNDPID/environ|grep ^DISPLAY=|cut -d= -f2-`

        kill $SOUNDPID
        ps "$SOUNDPID" &>/dev/null && kill -9 $SOUNDPID

        echo "$SOUNDPROG|$SOUNDPID|$SOUNDUSER|$SOUNDDISPLAY" >>$SOUND_RUN
        logger "pm-utils: Program $SOUNDPROG ($SOUNDPID) of user $SOUNDUSER on display $SOUNDDISPLAY terminated."

    done
    # We unload the modules later to give the driver some time
    # to spin down.

}

start_sound() {
    if [ -f $SOUND_RUN ] ; then
        # at least we can restart the programs using sound on
        # the right display
        while read n; do
            SOUNDPROG=`echo $n|cut '-d|' -f1`
            SOUNDPID=`echo $n|cut '-d|' -f2`
            SOUNDUSER=`echo $n|cut '-d|' -f3`
            SOUNDDISPLAY=`echo $n|cut '-d|' -f4`

            su --shell="/bin/bash" - "$SOUNDUSER" -c \
                "source /etc/profile;[ -f ~/.bashrc ] && \
                    source ~/.bashrc;[ -f ~/.bash_profile ] && \
                    source ~/.bash_profile;export DISPLAY="$SOUNDDISPLAY";$SOUNDPROG &"
            logger "pm-utils: Program $SOUNDPROG started as user $SOUNDUSER on display $SOUNDDISPLAY."
        done < $SOUND_RUN
        rm -f $SOUND_RUN 
    fi
}

case "$1" in
    hibernate|suspend)
        if [ "$RESTORE_SOUND" == "yes" ] ; then
            stop_sound
        fi
        ;;
    thaw|resume)
        if [ "$RESTORE_SOUND" == "yes" ] ; then
            start_sound
        fi
        ;;
    *)
        ;;
esac

exit $?