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COMSAT(8C)                                                          COMSAT(8C)



NAME
       comsat - biff server

SYNOPSIS
       /etc/comsat

DESCRIPTION
       Comsat is the server process which listens for reports of incoming mail
       and notifies users if they have requested this service.  Comsat listens
       on  a  datagram port associated with the ``biff'' service specification
       (see services(5)) for one line messages of the form

            user@mailbox-offset

       If the user specified is logged in to the  system  and  the  associated
       terminal  has  the  owner  execute bit turned on (by a ``biff y''), the
       offset is used as a seek offset into the appropriate mailbox  file  and
       the  first  7 lines or 560 characters of the message are printed on the
       user's terminal.  Lines which appear to be part of the  message  header
       other than the ``From'', ``To'', ``Date'', or ``Subject'' lines are not
       included in the displayed message.

FILES
       /etc/utmp to find out who's logged on and on what terminals

SEE ALSO
       biff(1)

BUGS
       The message header filtering is prone to error.

       Users should be notified of mail which arrives on other  machines  than
       the one they are currently logged in to.

       The notification should appear in a separate window so it does not mess
       up the screen.



4th Berkeley Distribution        18 July 1983                       COMSAT(8C)