NAME¶
rpc.lockd —
NFS file locking
daemon
SYNOPSIS¶
| rpc.lockd |
[-d
debug_level]
[-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.
- -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.
