Provided by: zephyr-clients_3.1.2-1_amd64 bug

NAME

       zctl - zephyr control program

SYNOPSIS

       zctl [ options ]

DESCRIPTION

       Zctl  is  a  general  purpose  control program for the Zephyr(1) Notification Service.  It
       allows the user to subscribe to specific notice types, to save the subscriptions in a file
       (default  $HOME/.zephyr.subs),  to  change  his  location information, and to send control
       messages to the HostManager, zhm(8), and the WindowGram client, zwgc(1).

       The commands may be typed on the command line, or may be  entered  interactively  by  just
       typing zctl and then typing commands to the prompt.
       NOTE: For all commands accepting an optional recipient argument, the recipient defaults to
       your Kerberos principal.  You may also subscribe to recipient ``*''.   If  you  specify  a
       recipient, it is silently converted to ``*''.
       The commands are as follows:

       add class instance [ recipient ]
                      Subscribe  to  class,  instance,  recipient,  and  add  this triplet to the
                      subscriptions file.

       add_unsubscription class instance [ recipient ]
                      Unsubscribe to class, instance, recipient, and  add  this  triplet  to  the
                      subscriptions  file  as  an  un-subscription.   For  an  explanation of un-
                      subscriptions, see below.

       cancel         Cancel all subscriptions.

       defaults       Retrieve the default subscription list from the Zephyr server.

       delete class instance [ recipient ]
                      Unsubscribe to class, instance, recipient, and remove this triplet from the
                      subscriptions file.

       delete_unsubscription class instance [ recipient ]
                      Unsubscribe to class, instance, recipient, and remove this triplet from the
                      subscriptions file as an un-subscription.

       file [ file ]  Set default subscriptions file to file.  If file isn't specified, show what
                      the current subscriptions file is.

       flush_locs [ user ]
                      Tell  the  Zephyr servers to flush all location information associated with
                      user, or with the user running the command if none is given.   This  should
                      only  be  used to remove any incorrect data that may have been left after a
                      system  crash.   Note  that  only  Operations  staff  may  flush   location
                      information associated with another user.

       flush_subs [ recipient ]
                      Tell  the  Zephyr  servers  to flush all of recipient's subscriptions, This
                      differs from the cancel command in that it affects subscriptions for all of
                      recipient's  clients.   Note  that  only  Operations  staff  may  flush the
                      subscriptions of another user.

       hide           Hide your location as maintained by  the  Zephyr  server.   This  does  not
                      affect the value of the exposure variable (see below, under set).

       hm_flush       Tell  the  HostManager,  zhm(8),  to  ask  the  server  to  flush all state
                      associated with the current host.

       list [ file ]  List contents of current subscriptions file or file.   Any  macros  in  the
                      file (see below) are displayed verbatim and not expanded.

       list_requests  List all available commands.  May be abbreviated by '?'.

       load [ file ]  Subscribe   to  all  subscription  triplets  and  unsubscribe  to  all  un-
                      subscription triplets in current subscriptions file or file.

       new_server     Tell the HostManager, zhm(8), to find a new Zephyr server.

       quit           Exit from zctl.

       retrieve       Retrieve all current subscriptions from the Zephyr server.   These  include
                      subscriptions that might have been made by other programs, such as znol(1).

       save [ file ]  Save  all  current  subscriptions  (as  returned by the Zephyr server) into
                      current subscriptions file or file.  The file will be replaced.

       set var [ value ]
                      Set the value of Zephyr variable var to value,  or  null  if  no  value  is
                      specified.  The variable exposure has special significance, and can only be
                      set to the  values  none,  opstaff,  realm-visible,  realm-announced,  net-
                      visible,  and net-announced.  Setting this variable immediately updates the
                      information in the Zephyr servers (see below  for  an  explanation  of  the
                      exposure levels).  In addition, setting this variable to none automatically
                      performs the equivalent of a wg_shutdown command, and setting it to one  of
                      the  other  values  automatically  performs  the equivalent of a wg_startup
                      command.
                      The variable resolved_addresses determines whether zwgc  will,  for  an  IP
                      address indicating the origin of a message, attempt to look up the hostname
                      corresponding to that IP address. The value none indicates  that  hostnames
                      will  never  be found, and that the zwgc fromhost variable will thus always
                      contain an IP address (in dotted-decimal form).  The  value  all  indicates
                      that  there  will  always be an attempt to look up a hostname. Note that in
                      this case, if you  have  any  subscriptions  with  recipient  ``*'',  these
                      subscriptions  may  be revealed to other Zephyr users who operate their own
                      DNS name servers. Any other value is interpreted as a  regular  expression;
                      hostname  lookup  attempts  will  occur only if the IP address matches this
                      regular expression.
                      Any variable settings you make will be stored in $HOME/.zephyr.vars

       show var [ var  ... ]
                      Show the value of the specified Zephyr variables.  If  a  variable  is  not
                      defined  in  the  user's  own  variables  file,  the  system variables file
                      (/etc/zephyr/zephyr.vars) is searched for a default value.

       subscribe class instance [ recipient ]
                      Subscribe to class, instance, recipient, but don't add this triplet to  the
                      subscriptions file.

       unhide         Make  your  location as maintained by the Zephyr server visible.  This does
                      not affect the value of the exposure variable.

       unload [ file ]
                      Unsubscribe to all subscription triplets in current subscriptions  file  or
                      file.  Un-subscriptions in the file are ignored.

       unset var [ var  ... ]
                      Delete the definitions of the specified Zephyr variables.

       unsubscribe class instance [ recipient ]
                      Unsubscribe  to  class,  instance, recipient, but don't remove this triplet
                      from the subscriptions file.

       wg_exit        Tell the WindowGram client, zwgc(1), to exit.

       wg_read        Tell the WindowGram client, zwgc(1), to reread its description file.

       wg_shutdown    Tell the WindowGram client to  shutdown;  this  causes  it  to  ignore  all
                      notices until a wg_startup command is issued.

       wg_startup     Tell the WindowGram client to start accepting notices again; useful after a
                      wg_shutdown command has been issued.

MACROS and SUBSCRIPTION FILES

       There are three macros, %host%, %canon%, and %me%. %host%  is  converted  to  the  current
       hostname,  %canon%  is converted to the official hostname as returned by gethostbyname(3),
       and %me% is converted to your Kerberos principal.   These  macros  can  be  used  in  your
       $HOME/.zephyr.subs  file  or  as  arguments  to  commands to specify the class or instance
       fields.  A sample $HOME/.zephyr.subs file might contain the following:

            message,urgent,%me%
            syslog,%host%,*
            mail,pop,%me%

       Zctl reads the environment variable WGFILE, to  find  the  name  of  the  file  where  the
       windowgram  port  resides.   If  WGFILE is not set, the file name defaults to /tmp/wg.uid,
       where uid is the user's UNIX uid.

UN-SUBSCRIPTIONS

       The zephyr server, zephyrd(8), maintains default  subscriptions  which  are  automatically
       added  to  all users' subscriptions at the time of their first subscription during a login
       session.  If you wish to automatically remove some of these default subscriptions, you use
       un-subscriptions.   When you load a subscription file containing un-subscriptions, the un-
       subscriptions are automatically sent to the server as if  you  had  used  the  unsubscribe
       command.

EXPOSURE LEVELS

       The  different exposure levels affect the operation of zephyr and its interaction with the
       user, as follows:

       none      This completely disables Zephyr for the user. The user is  not  registered  with
                 Zephyr.  No user location information is retained by Zephyr.  No login or logout
                 announcements will be sent.  No subscriptions will be entered for the user,  and
                 no notices will be displayed by zwgc(1).

       opstaff   The  user  is  registered with Zephyr.  No login or logout announcements will be
                 sent, and location  information  will  only  be  visible  to  Operations  staff.
                 Default  subscriptions and any additional personal subscriptions will be entered
                 for the user.

       realm-visible
                 The user is registered with Zephyr.  User location information  is  retained  by
                 Zephyr  and  made  available only to users within the user's Kerberos realm.  No
                 login or logout announcements  will  be  sent.   This  is  the  system  default.
                 Default  subscriptions and any additional personal subscriptions will be entered
                 for the user.

       realm-announced
                 The user is registered with Zephyr.  User location information  is  retained  by
                 Zephyr and made available only to users authenticated within the user's Kerberos
                 realm.  Login and logout announcements will be sent, but only  to  users  within
                 the  user's Kerberos realm who have explicitly requested such via subscriptions.
                 Default subscriptions and any additional personal subscriptions will be  entered
                 for the user.

       net-visible
                 The  user  is  registered with Zephyr.  User location information is retained by
                 Zephyr and made available to any authenticated user who requests such. Login and
                 logout announcements will be sent only to users within the user's Kerberos realm
                 who have explicitly requested such via subscriptions.  Default subscriptions and
                 any additional personal subscriptions will be entered for the user.

       net-announced
                 The  user  is  registered  with Zephyr. User location information is retained by
                 Zephyr and made available to any authenticated user who  requests  such.   Login
                 and  logout  announcements will be sent to any user has requested such.  Default
                 subscriptions and any additional personal subscriptions will be entered for  the
                 user.

EXAMPLES

       zctl                     Runs zctl in interactive mode.

       zctl load                Load  subscriptions  and un-subscriptions from $HOME/.zephyr.subs
                                file.

       zctl sub message personal
                                Subscribe to  personal  messages,  but  don't  add  this  to  the
                                subscriptions file.

       zctl save                Save all current subscriptions to the default subscriptions file.

       zctl set exposure none   Set  your  exposure  level  to  `none',  effectively  turning off
                                Zephyr.

SEE ALSO

       zephyr(1), zwgc(1), zhm(8), zephyrd(8) gethostbyname(3)
       Project Athena Technical Plan Section E.4.1, `Zephyr Notification Service'

FILES

       /tmp/wg.*
       $HOME/.zephyr.subs
       $ZEPHYR_VARS or $HOME/.zephyr.vars
       /etc/zephyr/zephyr.vars

AUTHOR

       Robert S. French (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.