#!/bin/bash
#
# chkconfig: - 91 35
# description: Starts and stops vncserver. \
#              used to provide remote X administration services.

### BEGIN INIT INFO
# Provides: vncserver
# Required-Start: $network $named
# Required-Stop: $network $named
# Default-Start:
# Default-Stop: 0 1 2 3 4 5 6
# Short-Description: start|stop|restart|try-restart|status|force-reload vncserver
# Description: control vncserver which exports your desktop
### END INIT INFO

# Source function library.
. /etc/init.d/functions

[ -r /etc/sysconfig/vncservers ] && . /etc/sysconfig/vncservers

prog=$"VNC server"

RETVAL=0

start() {
    [ "$EUID" != "0" ] && exit 4
    
    # Source networking configuration.
    . /etc/sysconfig/network

    # Check that networking is up.
    [ ${NETWORKING} = "no" ] && exit 1

    [ -x /usr/bin/vncserver ] || exit 5
    [ -x /usr/bin/Xvnc ] || exit 5

    echo -n $"Starting $prog: "
    RETVAL=0
    if [ ! -d /tmp/.X11-unix ]
    then
        mkdir -m 1777 /tmp/.X11-unix || :
        restorecon /tmp/.X11-unix 2>/dev/null || :
    fi

    STARTED=0
    for display in ${VNCSERVERS}
    do
        SERVS=1
        echo -n "${display} "
        DISP="${display%%:*}"
        USER="${display##*:}"
        VNCUSERARGS="${VNCSERVERARGS[${DISP}]}"
        runuser -l ${USER} -c "vncserver :${DISP} ${VNCUSERARGS}" < /dev/null
        RETVAL=$?
        [ "$RETVAL" -eq 0 ] && STARTED=`expr $STARTED + 1`
    done

    if [ -z "$SERVS" ]; then
        echo -n "no displays configured "
        failure
        RETVAL=6
    else
        if [ "$STARTED" -gt 0 ]; then
            success $"vncserver startup"
            touch /var/lock/subsys/Xvnc
        else 
            failure $"vncserver start"
        fi
    fi
    echo

# As written in https://bugzilla.redhat.com/show_bug.cgi?id=523974 (LSB
# compliance) start of already running service is OK.
    [ "$RETVAL" -eq 98 ] && RETVAL=0

    return "$RETVAL"
}

stop() {
    [ "$EUID" != "0" ] && exit 4

    echo -n $"Shutting down $prog: "

    status Xvnc > /dev/null 2>&1
    RETVAL=$?

    STOPPED=0
    # 3 means service is already stopped
    if ! [ "$RETVAL" -eq 3 ]; then
        for display in ${VNCSERVERS}; do
            echo -n "${display} "
            export USER="${display##*:}"
            runuser ${USER} -c "vncserver -kill :${display%%:*}" >/dev/null 2>&1
            RETVAL=$?
            [ "$RETVAL" -eq 0 ] && STOPPED=`expr $STOPPED + 1`
        done
        RETVAL=$?
    else
        let STOPPED=1
        let RETVAL=0
    fi

    [ "$STOPPED" -gt 0 ] && success $"vncserver shutdown" || \
        failure $"vncserver shutdown"
    echo
    [ "$STOPPED" -gt 0 ] && rm -f /var/lock/subsys/Xvnc
    return "$RETVAL"
}

# See how we were called.
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  restart|force-reload)
        stop
        sleep 3
        start
        ;;
  condrestart)
#       https://bugzilla.redhat.com/show_bug.cgi?id=508367
#       echo "condrestart is obsolete, use try-restart instead"
        if [ -e /var/lock/subsys/Xvnc ]; then
            stop
            sleep 3
            start
        fi
        ;;
  try-restart)
        if [ -e /var/lock/subsys/Xvnc ]; then
            stop
            sleep 3
            start
        fi
        ;;
  status)
        status Xvnc
        RETVAL=$?
        ;;
  reload)
        exit 3
        ;;
  *)
        echo $"Usage: $0 {start|stop|restart|try-restart|status|force-reload}"
        exit 2
esac

exit "$RETVAL"