#! /bin/sh
#
# INSTRUCTIONS:
#  - Copy this file to /etc/init.d/sems
#  - Don't forget to copy the default file for this script to work properly 
#
### BEGIN INIT INFO
# Provides: sems
# Required-Start: $syslog $network $local_fs $time
# Required-Stop: $syslog $network $local_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start the SEMS server
# Description: Start the SEMS server
### END INIT INFO

PATH=/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/local/sbin/sems
NAME=sems
DESC=sems
HOMEDIR=/var/run/sems
PIDFILE=$HOMEDIR/$NAME.pid
DEFAULTS=/etc/default/sems
RUN_SEMS=no

# Do not start sems if fork=no is set in the config file
# otherwise the boot process will just stop
check_fork ()
{
    if grep -q "^[[:space:]]*fork[[:space:]]*=[[:space:]]*no.*" /usr/local/etc/sems/sems.conf; then
        echo "Not starting $DESC: fork=no specified in config file; run /etc/init.d/sems debug instead"
        exit 1
    fi
}

create_radius_seqfile ()
{
    # Create a radius sequence file to be used by the radius client if
    # radius accounting is enabled. This is needed to avoid any issue
    # with the file not being writable if sems first starts as user
    # root because DUMP_CORE is enabled and creates this file as user
    # root and then later it switches back to user sems and cannot
    # write to the file. If the file exists before sems starts, it
    # won't change it's ownership and will be writable for both root
    # and sems, no matter what options are chosen at install time
    RADIUS_SEQ_FILE=/var/run/sems/sems_radius.seq
    if [ -d /var/run/sems ]; then
        chown ${USER}:${GROUP} /var/run/sems

        if [ ! -f $RADIUS_SEQ_FILE ]; then
            touch $RADIUS_SEQ_FILE
        fi

        chown ${USER}:${GROUP} $RADIUS_SEQ_FILE
        chmod 660 $RADIUS_SEQ_FILE
    fi
}

test -f $DAEMON || exit 0

# Load startup options if available
if [ -f $DEFAULTS ]; then
   . $DEFAULTS || true
fi

if [ "$RUN_SEMS" != "yes" ]; then
    echo "SEMS not yet configured. Edit /etc/default/sems first."
    exit 0
fi

set -e

[ -z "$USER" ] && USER=sems
[ -z "$GROUP" ] && GROUP=sems

if test "$DUMP_CORE" = "yes" ; then
    # set proper ulimit
    ulimit -c unlimited
    
    # directory for the core dump files
    # COREDIR=/home/corefiles
    # [ -d $COREDIR ] || mkdir $COREDIR
    # chmod 777 $COREDIR
    # echo "$COREDIR/core.%e.sig%s.%p" > /proc/sys/kernel/core_pattern
fi

OPTIONS="-P $PIDFILE -u $USER -g $GROUP"

case "$1" in
  start|debug)
        create_radius_seqfile

        DBG_OPTIONS=""

        if [ "$1" != "debug" ]; then
            check_fork
        else
            DBG_OPTIONS="-D 3 -E"
        fi

        # FIXME
        # This is a small hack to prevent some broken apps to be loaded
        rm -f /usr/local/lib/sems/plug-in/py_sems.so /usr/local/lib/sems/plug-in/sw_prepaid_sip.so

        echo "$DAEMON $OPTIONS $DBG_OPTIONS"
        echo -n "Starting $DESC: $NAME"
        start-stop-daemon --start --quiet --pidfile $PIDFILE \
                --exec $DAEMON -- $OPTIONS $DBG_OPTIONS || echo -n " already running"
        echo "."
        ;;
  stop)
        echo -n "Stopping $DESC: $NAME"
        start-stop-daemon --oknodo --stop --quiet --pidfile $PIDFILE \
                --exec $DAEMON
        echo "."
        ;;
  restart|force-reload)
        create_radius_seqfile

        echo -n "Restarting $DESC: $NAME"
        start-stop-daemon --oknodo --stop --quiet --pidfile \
                $PIDFILE --exec $DAEMON
        sleep 1
        start-stop-daemon --start --quiet --pidfile \
                $PIDFILE --exec $DAEMON -- $OPTIONS
        echo "."
        ;;
  status)
        echo -n "Status of $DESC: "
        if [ ! -r "$PIDFILE" ]; then
                echo "$NAME is not running."
                exit 3
        fi
        pid=`cat "$PIDFILE"`
        if ps -p "$pid" > /dev/null 2>&1; then
                echo "$NAME is running."
                exit 0
        else
                echo "$NAME is not running but $PIDFILE exists."
                exit 1
        fi
        ;;
  *)
        N=/etc/init.d/$NAME
        echo "Usage: $N {start|stop|restart|force-reload|debug|status}" >&2
        exit 1
        ;;
esac

exit 0