lockd(1M)                                               lockd(1M)



     NAME
          lockd - process network lock daemon

     SYNOPSIS
          /etc/rpc.lockd [ -t timeout ] [ -g graceperiod ]

     DESCRIPTION
          lockd is a network lock daemon that processes lock requests
          that are sent either locally by the kernel or remotely by
          another lock daemon.  lockd forwards lock requests for re-
          mote data to the lock daemon at the server site through the
          RPC/XDR package. lockd then requests the status monitor dae-
          mon, statd(1M), for monitor service.  The reply to the lock
          request is not sent to the kernel until the status monitor
          daemon and the lock daemon at the server site replies.

          If either the status monitor daemon or the lock daemon at
          the server site is unavailable, the reply to a lock request
          for remote data is delayed until all daemons become avail-
          able.

          When a server recovers, it waits for a grace period for each
          lockd at a client site to submit reclaim requests.  Each
          lockd at a client site, on the other hand, is notified by
          the statd of the server recovery and promptly resubmits a
          previously granted lock request.  If lockd fails to secure a
          previously granted lock at the server site, lockd sends
          SIGTERM to a process.

     FLAG OPTIONS
          The following flag options are interpreted by lockd:

          -t timeout
                    Use timeout (seconds) as the interval instead of
                    the default value (15 seconds) to retransmit a
                    lock request to the remote server.

          -g graceperiod
                    Use graceperiod (seconds) as the grace period
                    duration instead of the default value (45
                    seconds).

     SEE ALSO
          fcntl(2), lockf(3), signal(3), statd(1M).











     April, 1990                                                     1