RPC.LOCKD(8)            FreeBSD System Manager's Manual           RPC.LOCKD(8)

NAME
     rpc.lockd - NFS file locking daemon

SYNOPSIS
     rpc.lockd [-d debug_level] [-F] [-g grace period] [-h bindip] [-p port]

DESCRIPTION
     The rpc.lockd 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 rpc.statd(8).

     Options and operands available for rpc.lockd:

     -d      The -d option causes debugging information to be written to
             syslog, recording all RPC transactions to the daemon.  These
             messages are logged with level LOG_DEBUG and facility LOG_DAEMON.
             Specifying a 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.

     -F      Run rpc.lockd in the foreground, rather than going into daemon
             mode.  This is useful if some other process uses fork(2) and
             exec(3) to run rpc.lockd, and wants to monitor when and how it
             exits.

     -g      The -g option allow to specify the grace period, in seconds.
             During the grace period rpc.lockd only accepts requests from
             hosts which are reinitialising locks which existed before the
             server restart.  Default is 30 seconds.

     -h bindip
             Specify specific IP addresses to bind to.  This option may be
             specified multiple times.  If no -h option is specified,
             rpc.lockd will bind to INADDR_ANY.  Note that when specifying IP
             addresses with -h, rpc.lockd will automatically add 127.0.0.1 and
             if IPv6 is enabled, ::1 to the list.

     -p      The -p option allow to force the daemon to bind to the specified
             port, for both AF_INET and AF_INET6 address families.

     Error conditions are logged to syslog, irrespective of the debug level,
     using log level LOG_ERR and facility LOG_DAEMON.

     The rpc.lockd utility must NOT be invoked by inetd(8) because the
     protocol assumes that the daemon will run from system start time.
     Instead, it should be configured in rc.conf(5) to run at system startup.

FILES
     /usr/include/rpcsvc/nlm_prot.x  RPC protocol specification for the
                                     network lock manager protocol.

SEE ALSO
     syslog(3), rc.conf(5), rpc.statd(8)

STANDARDS
     The implementation is based on the specification in Protocols for X/Open
     PC Interworking: XNFS, Issue 4, X/Open CAE Specification C218, ISBN 1
     872630 66 9.

HISTORY
     A version of rpc.lockd appeared in SunOS 4.

BUGS
     The current implementation serialises locks requests that could be
     shared.

FreeBSD 13.1-RELEASE-p6        November 21, 2019       FreeBSD 13.1-RELEASE-p6