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Allow selection of the affected terminal using redirection

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of standard input or standard output, like mesg(1) does.

Suggested by:	sheldonh
This commit is contained in:
Robert Drehmel 2002-07-24 15:48:17 +00:00
parent eeb9251884
commit adf721d1cb
2 changed files with 10 additions and 1 deletions
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7
usr.bin/biff/biff.1
View File

@ -47,6 +47,13 @@ The
utility informs the system whether you want to be notified when mail arrives
during the current terminal session.
.Pp
Affected is the first terminal associated with the standard input,
standard output or standard error file descriptor, in that order.
Thus, it is possible to use the redirection facilities of a shell to
toggle the notification for other terminals than the one
.Nm
runs on.
.Pp
The following options are available:
.Bl -tag -width indent
.It Cm n

4
usr.bin/biff/biff.c
View File

@ -74,7 +74,9 @@ main(argc, argv)
argc -= optind;
argv += optind;
if ((name = ttyname(STDERR_FILENO)) == NULL)
if ((name = ttyname(STDIN_FILENO)) == NULL &&
(name = ttyname(STDOUT_FILENO)) == NULL &&
(name = ttyname(STDERR_FILENO)) == NULL)
err(2, "unknown tty");
if (stat(name, &sb))