3 files changed, 204 insertions, 0 deletions

diff --git a/usr.bin/biff/Makefile b/usr.bin/biff/Makefile
new file mode 100644
index 000000000000..9597cdddaf47
--- /dev/null
+++ b/usr.bin/biff/Makefile
@@ -0,0 +1,7 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+# $FreeBSD$
+
+PROG=	biff
+WARNS?=	2
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/biff/biff.1 b/usr.bin/biff/biff.1
new file mode 100644
index 000000000000..f7b26f9d281d
--- /dev/null
+++ b/usr.bin/biff/biff.1
@@ -0,0 +1,89 @@
+.\" Copyright (c) 1980, 1990, 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. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. 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.
+.\"
+.\"     @(#)biff.1	8.1 (Berkeley) 6/6/93
+.\" $FreeBSD$
+.\"
+.Dd June 6, 1993
+.Dt BIFF 1
+.Os
+.Sh NAME
+.Nm biff
+.Nd "be notified if mail arrives and who it is from"
+.Sh SYNOPSIS
+.Nm
+.Op Cm n | y
+.Sh DESCRIPTION
+.Nm Biff
+informs the system whether you want to be notified when mail arrives
+during the current terminal session.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Cm n
+Disable notification.
+.It Cm y
+Enable notification.
+.El
+.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
+.Dq Li biff y
+command is often included in the file
+.Pa \&.login
+or
+.Pa \&.profile
+to be executed at each login.
+.Pp
+.Nm Biff
+operates asynchronously.
+For synchronous notification use the
+.Ev MAIL
+variable of
+.Xr sh 1
+or the
+.Ev mail
+variable of
+.Xr csh 1 .
+.Sh SEE ALSO
+.Xr csh 1 ,
+.Xr mail 1 ,
+.Xr sh 1 ,
+.Xr comsat 8
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.0 .
+It was named after the dog of Heidi Stettner.
+He died
+in August 1993, at 15.
diff --git a/usr.bin/biff/biff.c b/usr.bin/biff/biff.c
new file mode 100644
index 000000000000..b028a55ff5a7
--- /dev/null
+++ b/usr.bin/biff/biff.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 1980, 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1980, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static const char sccsid[] = "@(#)biff.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <err.h>
+
+int main __P((int, char *[]));
+static void usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	struct stat sb;
+	int ch;
+	char *name;
+
+
+	while ((ch = getopt(argc, argv, "")) != -1)
+		switch(ch) {
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if ((name = ttyname(STDERR_FILENO)) == NULL)
+		err(2, "unknown tty");
+
+	if (stat(name, &sb))
+		err(2, "stat");
+
+	if (*argv == NULL) {
+		(void)printf("is %s\n", sb.st_mode & S_IXUSR ? "y" : "n");
+		return(sb.st_mode & S_IXUSR ? 0 : 1);
+	}
+
+	switch(argv[0][0]) {
+	case 'n':
+		if (chmod(name, sb.st_mode & ~S_IXUSR) < 0)
+			err(2, "%s", name);
+		break;
+	case 'y':
+		if (chmod(name, sb.st_mode | S_IXUSR) < 0)
+			err(2, "%s", name);
+		break;
+	default:
+		usage();
+	}
+	return(sb.st_mode & S_IXUSR ? 0 : 1);
+}
+
+static void
+usage()
+{
+	(void)fprintf(stderr, "usage: biff [y | n]\n");
+	exit(2);
+}