111 lines
3.5 KiB
Groff
111 lines
3.5 KiB
Groff
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)comsat.8 8.1 (Berkeley) 6/4/93
|
|
.\"
|
|
.Dd January 21, 2010
|
|
.Dt COMSAT 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm comsat
|
|
.Nd biff server
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility is the server process which receives reports of incoming mail
|
|
and notifies users if they have requested this service.
|
|
The
|
|
.Nm
|
|
utility receives messages on a datagram port associated with the
|
|
.Dq biff
|
|
service
|
|
specification (see
|
|
.Xr services 5
|
|
and
|
|
.Xr inetd 8 ) .
|
|
The one line messages are of the form:
|
|
.Pp
|
|
.D1 Ar user Ns @ Ns Ar mailbox Ns - Ns Ar offset Ns Op : Ns Ar mailbox-name
|
|
.Pp
|
|
If the
|
|
.Ar user
|
|
specified is logged in to the system and the associated terminal has
|
|
the owner execute bit turned on (by a
|
|
.Dq Nm biff Cm y ) ,
|
|
the
|
|
.Ar 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
|
|
.Dq Li From ,
|
|
.Dq Li \&To ,
|
|
.Dq Li Date ,
|
|
or
|
|
.Dq Li Subject
|
|
lines are not included in the displayed message.
|
|
.Pp
|
|
If the
|
|
.Ar user
|
|
specified is logged in to the system and the associated terminal has
|
|
the group execute bit turned on (by a
|
|
.Dq Nm biff Cm b ) ,
|
|
two bell characters
|
|
.Tn ( ASCII
|
|
\\007) are printed on the user's terminal.
|
|
.Pp
|
|
If
|
|
.Ar mailbox-name
|
|
omitted, standard mailbox assumed.
|
|
.Sh FILES
|
|
.Bl -tag -width ".Pa /var/mail/user" -compact
|
|
.It Pa /var/run/utx.active
|
|
to find out who is logged on and on what terminals
|
|
.It Pa /var/mail/user
|
|
standard mailbox
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr biff 1 ,
|
|
.Xr inetd 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
utility appeared in
|
|
.Bx 4.2 .
|
|
.Sh BUGS
|
|
The message header filtering is prone to error.
|
|
The density of the information presented is near the theoretical minimum.
|
|
.Pp
|
|
Users should be notified of mail which arrives on other
|
|
machines than the one to which they are currently logged in.
|
|
.Pp
|
|
The notification should appear in a separate window so it
|
|
does not mess up the screen.
|