rpc.statd(8)						      System Manager's Manual						      rpc.statd(8)

NAME

       rpc.statd - NSM status monitor

SYNOPSIS

       rpc.statd [-FNL] [-d] [-?] [-n  name ] [-o  port ] [-p  port ] [-H  prog ] [-V]

DESCRIPTION

       The  rpc.statd  server implements the NSM (Network Status Monitor) RPC protocol.  This service is somewhat misnamed, since it doesn't actu-
       ally provide active monitoring as one might suspect; instead, NSM implements a reboot notification service. It is  used	by  the  NFS  file
       locking service, rpc.lockd, to implement lock recovery when the NFS server machine crashes and reboots.

   Operation
       For  each  NFS  client or server machine to be monitored, rpc.statd creates a file in /var/lib/nfs/sm.  When starting, it normally runs sm-
       notify to iterate through these files and notify the peer rpc.statd on those machines.

OPTIONS

       -F     By default, rpc.statd forks and puts itself in the background when started. The -F argument tells it to remain  in  the  foreground.
	      This option is mainly for debugging purposes.

       -d     By default, rpc.statd sends logging messages via syslog(3) to system log.  The -d argument forces it to log verbose output to stderr
	      instead. This option is mainly for debugging purposes, and may only be used in conjunction with the -F parameter.

       -n, --name name
	      specify a name for rpc.statd to use as the local hostname. By default, rpc.statd will call gethostname(2) to get the local hostname.
	      Specifying a local hostname may be useful for machines with more than one interfaces.

       -o, --outgoing-port port
	      specify  a  port for rpc.statd to send outgoing status requests from.  By default, rpc.statd will ask portmap(8) to assign it a port
	      number.  As of this writing, there is not a standard port number that portmap always or usually assigns.	Specifying a port  may	be
	      useful when implementing a firewall.

       -p, --port port
	      specify  a port for rpc.statd to listen on.  By default, rpc.statd will ask portmap(8) to assign it a port number.  As of this writ-
	      ing, there is not a standard port number that portmap always or usually assigns.	Specifying a port may be useful when  implementing
	      a firewall.

       -P, --state-directory-path directory
	      specify a directory in which to place statd state information.  If this option is not specified the default of /var/lib/nfs is used.

       -N     Causes statd to run in the notify-only mode. When started in this mode, the statd program will check its state directory, send noti-
	      fications to any monitored nodes, and exit once the notifications have been sent. This mode is used to enable Highly  Available  NFS
	      implementations (i.e. HA-NFS).  This mode is deprecated - sm-notify should be used directly instead.

       -L, --no-notify
	      Inhibits	the  running of sm-notify.  If sm-notify is run by some other script at boot time, there is no need for statd to start sm-
	      notify itself.  This can be appropriate if starting of statd needs to be delayed until it is actually need.  In such cases sm-notify
	      should still be run at boot time.

       -H,  --ha-callout prog
	      Specify  a high availability callout program, which will receive callouts for all client monitor and unmonitor requests. This allows
	      rpc.statd to be used in a High Availability NFS (HA-NFS) environment. The program will be run with 3 arguments:  The first is either
	      add-client or del-client depending on the reason for the callout.  The second will be the name of the client.  The third will be the
	      name of the server as known to the client.

       -?     Causes rpc.statd to print out command-line help and exit.

       -V     Causes rpc.statd to print out version information and exit.

TCP_WRAPPERS SUPPORT
       This rpc.statd version is protected by the tcp_wrapper library. You have to give the clients access to rpc.statd if they should be  allowed
       to use it. To allow connects from clients of the .bar.com domain you could use the following line in /etc/hosts.allow:

       statd: .bar.com

       You have to use the daemon name statd for the daemon name (even if the binary has a different name).

       For further information please have a look at the tcpd(8) and hosts_access(5) manual pages.

SIGNALS

       SIGUSR1	causes rpc.statd to re-read the notify list from disk and send notifications to clients. This can be used in High Availability NFS
       (HA-NFS) environments to notify clients to reacquire file locks upon takeover of an NFS export from another server.

FILES

       /var/lib/nfs/state
       /var/lib/nfs/sm/*
       /var/lib/nfs/sm.bak/*

SEE ALSO

       rpc.nfsd(8), portmap(8)

AUTHORS

       Jeff Uphoff <juphoff@users.sourceforge.net>
       Olaf Kirch <okir@monad.swb.de>
       H.J. Lu <hjl@gnu.org>
       Lon Hohberger <hohberger@missioncriticallinux.com>
       Paul Clements <paul.clements@steeleye.com>

								    31 Aug 2004 						      rpc.statd(8)