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37 .Nd NFS file locking daemon
40 .Op Fl d Ar debug_level
42 .Op Fl g Ar grace period
48 utility provides monitored and unmonitored file and record locking services
49 in an NFS environment.
50 To monitor the status of hosts requesting locks,
51 the locking daemon typically operates in conjunction
55 Options and operands available for
57 .Bl -tag -width indent
61 option causes debugging information to be written to syslog, recording
62 all RPC transactions to the daemon.
63 These messages are logged with level
70 in the generation of one log line per protocol operation.
72 debug levels can be specified, causing display of operation arguments
73 and internal operations of the daemon.
77 in the foreground, rather than going into daemon mode.
78 This is useful if some other process uses
84 and wants to monitor when and how it exits.
88 option allow to specify the
91 During the grace period
93 only accepts requests from hosts which are reinitialising locks which
94 existed before the server restart.
95 Default is 30 seconds.
97 Specify specific IP addresses to bind to.
98 This option may be specified multiple times.
105 Note that when specifying IP addresses with
108 will automatically add
110 and if IPv6 is enabled,
116 option allow to force the daemon to bind to the specified
118 for both AF_INET and AF_INET6 address families.
121 Error conditions are logged to syslog, irrespective of the debug level,
129 utility must NOT be invoked by
131 because the protocol assumes that the daemon will run from system start time.
132 Instead, it should be configured in
134 to run at system startup.
136 .Bl -tag -width /usr/include/rpcsvc/nlm_prot.x -compact
137 .It Pa /usr/include/rpcsvc/nlm_prot.x
138 RPC protocol specification for the network lock manager protocol.
145 The implementation is based on the specification in
147 .%B "X/Open CAE Specification C218"
148 .%T "Protocols for X/Open PC Interworking: XNFS, Issue 4"
149 .%O ISBN 1 872630 66 9
158 The current implementation serialises locks requests that could be shared.