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COMSAT(8)		FreeBSD	System Manager's Manual		     COMSAT(8)

NAME
     comsat -- biff server

SYNOPSIS
     comsat

DESCRIPTION
     The comsat	utility	is the server process which receives reports of	incom-
     ing mail and notifies users if they have requested	this service.  The
     comsat utility receives messages on a datagram port associated with the
     ``biff'' service specification (see services(5) and inetd(8)).  The one
     line messages are of the form:

	   user@mailbox-offset[:mailbox-name]

     If	the user specified is logged in	to the system and the associated ter-
     minal 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	termi-
     nal.  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.

     If	the user specified is logged in	to the system and the associated ter-
     minal has the group execute bit turned on (by a ``biff b''), two bell
     characters	(ASCII \007) are printed on the	user's terminal.

     If	mailbox-name omitted, standard mailbox assumed.

FILES
     /var/run/utmp   to	find out who is	logged on and on what terminals
     /var/mail/user  standard mailbox

SEE ALSO
     biff(1), inetd(8)

HISTORY
     The comsat	utility	appeared in 4.2BSD.

BUGS
     The message header	filtering is prone to error.  The density of the
     information presented is near the theoretical minimum.

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

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

FreeBSD	9.3			 July 9, 2002			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | FILES | SEE ALSO | HISTORY | BUGS

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