DragonFly On-Line Manual Pages
RPC.LOCKD(8) DragonFly System Manager's Manual RPC.LOCKD(8)
rpc.lockd -- NFS file locking daemon
rpc.lockd [-d debug_level] [-g grace period] [-h bindip] [-p port]
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
Options and operands available for rpc.lockd:
-d The -d option causes debugging information to be written to sys-
log, recording all RPC transactions to the daemon. These mes-
sages 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.
-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.
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 proto-
col assumes that the daemon will run from system start time. Instead, it
should be configured in rc.conf(5) to run at system startup.
/usr/include/rpcsvc/nlm_prot.x RPC protocol specification for the net-
work lock manager protocol.
syslog(3), rc.conf(5), rpc.statd(8)
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.
A version of rpc.lockd appeared in SunOS 4.
The current implementation provides only the server side of the protocol
(i.e., clients running other OS types can establish locks on a DragonFly
fileserver, but there is currently no means for a DragonFly client to
The current implementation serialises locks requests that could be
DragonFly 3.5 November 2, 2007 DragonFly 3.5