biff.1

<B>Digital的Unix操作系统VAX 4.2源码</B>

.\" SCCSID: @(#)biff.1	8.1	9/11/90
.TH biff 1
.SH Name
biff \- be notified if mail arrives and who it is from
.SH Syntax
.B biff
[\|\fBy|n\fR\|]
.SH Description
.NXR "biff command"
.NXA "mail program" "biff command"
.NXR "mail" "reporting incoming"
The
.PN biff
command informs the system whether you want to be notified when mail arrives
during the current terminal session.
The command,
.PN biff 
\fBy\fR, enables notification; the command,
.PN biff 
\fBn\fR, disables it.  The 
.PN biff
command with no options displays 
the current status of 
.PN biff .
.PP
When mail notification is enabled, the header and first few lines of
the message will be printed on your screen whenever mail arrives.
A 
.PN biff
.B y
command is often included in the file .login 
or .profile to be executed at each login.
.PP
The
.PN biff
command operates asynchronously.
For synchronous notification use the MAIL variable of
.MS sh 1
or the
.PN mail
variable of
.MS csh 1 .
.SH Options
.TP 5
.B n
Disables notification that mail has arrived.
.TP
.B y
Enables notification that mail has arrived.
.SH See Also
csh(1), mail(1), sh(1), comsat(8c)