network_cmds-176.3.3.tar.gz

[apple/network_cmds.git] / rpc_lockd.tproj / rpc.lockd.8

.\"	$NetBSD: rpc.lockd.8,v 1.5 2000/06/09 18:51:47 cgd Exp $
.\"	$FreeBSD: src/usr.sbin/rpc.lockd/rpc.lockd.8,v 1.14 2002/07/14 14:45:36 charnier Exp $
.\"
.\" Copyright (c) 1995 A.R.Gordon, andrew.gordon@net-tel.co.uk
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.Dd September 24, 1995
.Dt RPC.LOCKD 8
.Os
.Sh NAME
.Nm rpc.lockd
.Nd NFS file locking daemon
.Sh SYNOPSIS
.Nm
.Op Fl d Ar debug_level
.Op Fl g Ar grace period
.Op Fl x Ar statd cache period
.Sh DESCRIPTION
The
.Nm
utility provides monitored and unmonitored file and record locking services
in an NFS environment.
To monitor the status of hosts requesting locks,
the locking daemon typically operates in conjunction
with
.Xr rpc.statd 8 .
.Pp
Options and operands available for
.Nm :
.Bl -tag -width indent
.It Fl d
The
.Fl d
option causes debugging information to be written to syslog, recording
all RPC transactions to the daemon.
These messages are logged with level
.Dv LOG_DEBUG
and facility
.Dv LOG_DAEMON .
Specifying a
.Ar debug_level
of 1 results
in the generation of one log line per protocol operation.
Higher
debug levels can be specified, causing display of operation arguments
and internal operations of the daemon.
.It Fl g
The
.Fl g
option allow to specify the
.Ar grace period ,
in seconds.
During the grace period
.Nm
only accepts requests from hosts which are reinitialising locks which
existed before the server restart.
Default is 30 seconds.
.It Fl w
The
.Fl w
option tells
.Nm
to wait until the first client locking request is made before starting the
locking daemon(s).  This may be used on NFS clients to defer starting the
NFS locking daemons until it is known that they will be needed.  (Note:
.Xr rpc.statd 8
will also be started if it isn't already running)
.It Fl x
The
.Fl x
option tells rpc.lockd how long to cache state records for contacting
client
.Xr rpc.statd 8
implementations.  Setting it to zero will disable the cache which will
make lock and unlock requests from a single client more expensive because
of additional interaction with the client's statd.  The default cache time
is 60 seconds.
.El
.Pp
Error conditions are logged to syslog, irrespective of the debug level,
using log level
.Dv LOG_ERR
and facility
.Dv LOG_DAEMON .
.Pp
The
.Nm
utility must NOT be invoked by
.Xr inetd 8
because the protocol assumes that the daemon will run from system start time.
Instead, it should be configured in
.Xr rc.conf 5
to run at system startup.
.Sh FILES
.Bl -tag -width /usr/include/rpcsvc/nlm_prot.x -compact
.It Pa /usr/include/rpcsvc/nlm_prot.x
RPC protocol specification for the network lock manager protocol.
.El
.Sh SEE ALSO
.Xr syslog 3 ,
.Xr rc.conf 5 ,
.Xr rpc.statd 8
.Sh BUGS
The current implementation serialises locks requests that could be shared.
.Sh STANDARDS
The implementation is based on the specification in
.Rs
.%B "X/Open CAE Specification C218"
.%T "Protocols for X/Open PC Interworking: XNFS, Issue 4"
.%O ISBN 1 872630 66 9
.Re
.Sh HISTORY
A version of
.Nm
appeared in
.Tn SunOS
4.