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zhm

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zhm: Zephyr HostManager

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. ZHM(8)
 
 
 

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