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