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NAME

       zhm - Zephyr HostManager

SYNOPSIS

       /usr/sbin/zhm [ -d ] [ -n ] [ -h ] [ -r ] [ -i ] [ -f ] [ -N ] [ server
       ...  ]

DESCRIPTION

       Zhm is the link between a client machine and the  zephyr  server.   All
       notices  sent  from  programs  on  the client are funneled through zhm.
       This allows all client programs to be much simpler in  function,  since
       the HostManager is responsible for handling errors, retransmitting lost
       notices, and holding all notices until they are acknowledged.

       The -d option turns on debugging mode, and  sends  its  information  to
       syslog LOG_DAEMON messages.

       The  -n  option  causes  zhm  to  not  attempt  to  put  itself  in the
       background.

       The -h option causes zhm to send  a  shutdown  message  and  exit  upon
       delivery  of a SIGHUP signal.  The normal action on SIGHUP is to send a
       flush notice to the zephyr server.

       The -r option causes zhm to send a boot notice to the server  and  exit
       when the notice is acknowledged.

       The  -i  option  indicates that zhm is being started by inetd(8).  When
       this option is specified, zhm assumes that file descriptor zero (0)  is
       bound to the UDP datagram port designated for hostmanager use.  In this
       mode, SIGHUP is handled as if the -h option were specified.

       The -f option disables the "flush" operation which allows any client to
       flush all subscriptions for the host.

       The  -N  option  supresses  the initial "boot" message that flushes all
       subscriptions for the host, which is useful if you're restarting zhm on
       a host that people are using.

       The  optional  server  arguments  are used to replace the set of server
       names supplied by the hesiod(3) name server.

SEE ALSO

       zephyr(1), zephyrd(8), inetd(8)
       Project Athena  Technical  Plan  Section  E.4.1,  `Zephyr  Notification
       Service'

AUTHOR

       David C. Jedlinsky, MIT Project Athena

RESTRICTIONS

       Copyright  (c)  1987,1988 by the Massachusetts Institute of Technology.
       All Rights Reserved.
       zephyr(1) specifies the terms and conditions for redistribution.



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