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35 .Dd September 24, 1995
40 .Nd NFS file locking daemon
43 .Op Fl d Ar debug_level
44 .Op Fl g Ar grace period
48 daemon provides monitored and unmonitored file and record locking services
49 in an NFS environment. To monitor the status of hosts requesting locks,
50 the locking daemon typically operates in conjunction
54 Options and operands available for
61 option causes debugging information to be written to syslog, recording
62 all RPC transactions to the daemon. These messages are logged with level
63 LOG_DEBUG and facility LOG_DAEMON. Specifying a debug_level of 1 results
64 in the generation of one log line per protocol operation. Higher
65 debug levels can be specified, causing display of operation arguments
66 and internal operations of the daemon.
70 option allow to specify the grace period, in seconds. During the grace period
72 only accepts requests from hosts which are reinitialising locks which
73 existed before the server restart. Default is 30 seconds.
76 Error conditions are logged to syslog, irrespective of the debug level,
77 using log level LOG_ERR and facility LOG_DAEMON.
81 daemon must NOT be invoked by
83 because the protocol assumes that the daemon will run from system start time.
84 Instead, it should be configured in
86 to run at system startup.
88 .Bl -tag -width /usr/include/rpcsvc/nlm_prot.x -compact
89 .It Pa /usr/include/rpcsvc/nlm_prot.x
90 RPC protocol specification for the network lock manager protocol.
97 The implementation is based on the specification in X/Open CAE Specification
98 C218, "Protocols for X/Open PC Interworking: XNFS, Issue 4", ISBN 1 872630 66 9
105 The current implementation provides only the server side of the protocol
106 (i.e. clients running other OS types can establish locks on a
109 but there is currently no means for a
111 client to establish locks).
113 The current implementation serialises locks requests that could be shared.