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Command: lockd | Section: 8 | Source: FreeBSD | File: lockd.8.gz
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 NFSv3 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), nfslockd(4), 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 14.1-RELEASE-p8 May 8, 2024 FreeBSD 14.1-RELEASE-p8