lockd man page on Ultrix

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lockd(8c)							     lockd(8c)

       lockd - network lock daemon

       /usr/etc/lockd [ -t timeout ] [ -g graceperiod ]

       The  daemon processes lock requests that are either sent locally by the
       kernel or remotely by another lock daemon.   The	 NFS  locking  service
       makes  this  advisory locking support possible by using the system call
       and the subroutine.  The daemon forwards lock requests for remote  data
       to  the server site's lock daemon.  The daemon then requests the status
       monitor daemon, for monitor service.  The reply to the lock request  is
       not  sent  to  the kernel until the status daemon and the server site's
       lock daemon have replied.

       If either the status monitor or server site's lock daemon  is  unavail‐
       able,  the reply to a lock request for remote data is delayed until all
       daemons become available.

       When a server recovers, it waits for a grace period for all client site
       daemons	to  submit reclaim requests.  Client site daemons are notified
       by of the server recovery and promptly resubmit previously granted lock
       requests.  If a client site's daemon fails to secure previously granted
       locks at the server site, the daemon sends the signal  SIGLOST  to  all
       the  processes  that  were  previously holding locks and cannot reclaim

       -t timeout      The daemon uses timeout (in seconds)  as	 the  interval
		       instead	of the default value of 15 seconds to retrans‐
		       mit a lock request to the remote server.

       -g graceperiod  The daemon uses graceperiod (in seconds) as  the	 grace
		       period duration instead of the default value of 45 sec‐

See Also
       fcntl(2), lockf(3), signal(3), statd(8c)


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