#!/bin/sh
# DSP Gateway init script
# Copyright (C) 2007 INdT.
# @author Abner Jose de Faria Silva <abner.silva@indt.org.br>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

set -e

DESC="DSP Gateway"

DAEMON=/usr/sbin/dsp_dld
DSPCTL=/usr/sbin/dspctl
DSPCONF=/lib/dsp/dsp_dld_avs.conf

DAEMONPARAM="-p --disable-restart -c $DSPCONF"

KMEMRESERVE=360000

PIDDIR=/var/run/dsp
PIDFILE=$PIDDIR/pid

test -x "$DAEMON" || exit 0
test -x "$DSPCTL" || exit 0
test -e "$DSPCONF" || exit 0

start_dsp()
{
    if [ ! -d "$PIDDIR" ]; then
        mkdir -p "$PIDDIR"
    fi

    if [ -e "$PIDFILE" ]; then
        TMP=/proc/$(cat $PIDFILE)
        if [ -d "$TMP" -a "$(readlink -f $TMP/exe)" = "$DAEMON" ]; then
            echo "$DESC is already running."
            return
        else
            echo "Removing old PID file $PIDFILE."
            rm -f "$PIDFILE"
        fi
    fi

    echo -n "Starting $DESC: "

    $DSPCTL kmem_reserve $KMEMRESERVE
    start-stop-daemon --start --quiet -b --make-pidfile --pidfile "$PIDFILE" \
    --exec "$DAEMON" -- $DAEMONPARAM

    echo "done."
}

stop_dsp()
{
    echo -n "Stopping $DESC: "

    $DSPCTL kmem_release
    start-stop-daemon --stop --quiet --name $(basename "$DAEMON") \
    --pidfile "$PIDFILE"
    rm -f "$PIDFILE"

    echo "done."
}

case "$1" in
    start)
        start_dsp
        ;;
    stop)
        stop_dsp
        ;;
    restart|force-reload)
        stop_dsp
        start_dsp
        ;;
    *)
        echo "Usage: $(basename $0) {start|stop|restart|force-reload}" >&2
        exit 1
        ;;
esac

echo ""

exit 0