#!/sbin/runscript

#---------------------------------------------------------------------------
# This script starts/stops the following
#    rpc.statd if necessary (also checked by init.d/nfsmount)
#    rpd.rquotad
#    rpd.nfsd
#    rpc.mountd
#
# (17 Aug 2001 agriffis)
#---------------------------------------------------------------------------

# These can be overridden in /etc/rc.d/config/basic if desired
RPCNFSDCOUNT=8  # Number of servers to be started up by default
RPCMOUNTDOPTS=

# This variable is used for controlling whether or not to run exportfs -ua;
# see stop() for more information
RESTARTING=no

opts="start stop restart reload"

depend() {
    need net portmap
}

start_statd() {
    # Don't start rpc.statd if already started by init.d/nfsmount
    killall -0 rpc.statd &>/dev/null && return 0
    ebegin "Starting NFS statd"
    start-stop-daemon --start --quiet --exec /sbin/rpc.statd 1>&2
    eend $? "Error starting NFS statd"
}

stop_statd() {
    # Don't stop rpc.statd if it's in use by init.d/nfsmount.
    mount -t nfs | grep -q . && return 0
    # Make sure it's actually running
    killall -0 rpc.statd &>/dev/null || return 0
    # Okay, all tests passed, stop rpc.statd
    ebegin "Stopping NFS statd"
    start-stop-daemon --stop --quiet --exec /sbin/rpc.statd 1>&2
    eend $? "Error stopping NFS statd"
}

start() {
    if [ "$NFSSERVER" = "yes" ]
    then
	start_statd

	if grep -q '^/' /etc/exports &>/dev/null; then
	    ebegin "Exporting NFS directories"
	    /sbin/exportfs -r 1>&2
	    eend $? "Error exporting NFS directories"
	fi

	ebegin "Starting NFS rquotad"
	start-stop-daemon --start --quiet --exec /sbin/rpc.rquotad 1>&2
	eend $? "Error starting NFS rquotad"

	ebegin "Starting NFS daemon"
	start-stop-daemon --start --quiet --exec \
	    /sbin/rpc.nfsd -- $RPCNFSDCOUNT 1>&2
	eend $? "Error starting NFS daemon"

	# Check if we support NFSv3
	ebegin "Starting NFS mountd"
	rpcinfo -u localhost nfs 3 &>/dev/null || \
	    RPCMOUNTDOPTS="$RPCMOUNTDOPTS --no-nfs-version 3"
	start-stop-daemon --start --quiet --exec \
	    /sbin/rpc.mountd -- $RPCMOUNTDOPTS 1>&2
	eend $? "Error starting NFS mountd"
    fi
}

stop() { 
    # Don't check NFSSERVER variable since it might have changed,
    # instead use --oknodo to smooth things over
    ebegin "Stopping NFS mountd"
    start-stop-daemon --stop --quiet --oknodo \
	--exec /sbin/rpc.mountd 1>&2
    eend $? "Error stopping NFS mountd"

    ebegin "Stopping NFS daemon"
    start-stop-daemon --stop --quiet --oknodo \
	--name nfsd --user root --signal 2 1>&2
    eend $? "Error stopping NFS daemon"

    ebegin "Stopping NFS rquotad"
    start-stop-daemon --stop --quiet --oknodo \
	--exec /sbin/rpc.rquotad 1>&2
    eend $? "Error stopping NFS rquotad"

    # When simply restarting the NFS server, running "exportfs -ua"
    # probably isn't what the user wants.  Running it causes all
    # entries listed in xtab to be removed from the kernel export
    # tables, and the xtab file is cleared. This effectively shuts
    # down all NFS activity, leaving all clients holding stale NFS
    # filehandles, /even/ when the NFS server has restarted.
    #
    # This is what you would want if you were shutting down the NFS
    # server for good, or for a long period of time, but not when the
    # NFS server will be running again in short order.  In this case,
    # then "exportfs -r" will reread the xtab, and all the current
    # clients will be able to resume NFS activity, /without/ needing
    # to umount/(re)mount the filesystem.
    if [ "$RESTARTING" = no ]; then
	ebegin "Unexporting NFS directories"
	/sbin/exportfs -ua 1>&2
	eend $? "Error unexporting NFS directories"
    fi

    stop_statd
}

reload() {
    /sbin/exportfs -r
}

restart() {
    # See comment in stop() regarding exportfs -ua
    RESTARTING=yes
    stop
    start
}