BSD 4.4 Lite Usr.bin Sources

3 files changed, 200 insertions, 0 deletions

diff --git a/usr.bin/mesg/Makefile b/usr.bin/mesg/Makefile
new file mode 100644
index 0000000..8c54356
--- /dev/null
+++ b/usr.bin/mesg/Makefile
@@ -0,0 +1,5 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+
+PROG=	mesg
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/mesg/mesg.1 b/usr.bin/mesg/mesg.1
new file mode 100644
index 0000000..70e29a9
--- /dev/null
+++ b/usr.bin/mesg/mesg.1
@@ -0,0 +1,91 @@
+.\" Copyright (c) 1987, 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.
+.\"
+.\"	@(#)mesg.1	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt MESG 1
+.Os
+.Sh NAME
+.Nm mesg
+.Nd display (do not display) messages from other users
+.Sh SYNOPSIS
+.Nm mesg
+.Op Cm n | Cm y
+.Sh DESCRIPTION
+The
+.Nm mesg
+utility is invoked by a users to control write access others
+have to the terminal device associated with the standard error
+output.
+Write access is allowed by default, and programs such as
+.Xr talk 1
+and
+.Xr write 1
+may display messages on the terminal.
+.Pp
+Options available:
+.Bl -tag -width flag
+.It Cm n
+Disallows messages.
+.It Cm y
+Permits messages to be displayed.
+.El
+.Pp
+If no arguments are given,
+.Nm mesg
+displays the present message status to the standard error output.
+.Pp
+The
+.Nm mesg
+utility exits with one of the following values:
+.Bl -tag -width flag -compact -offset indent
+.Pp
+.It Li "\ 0"
+Messages are allowed.
+.It Li "\ 1"
+Messages are not allowed.
+.It Li "\>1"
+An error has occurred.
+.El
+.Sh FILES
+.Bl -tag -width /dev/[pt]ty[pq]? -compact
+.It Pa /dev/[pt]ty[pq]?
+.El
+.Sh SEE ALSO
+.Xr biff 1 ,
+.Xr talk 1 ,
+.Xr write 1
+.Sh HISTORY
+A
+.Nm mesg
+command appeared in
+.At v6 .
diff --git a/usr.bin/mesg/mesg.c b/usr.bin/mesg/mesg.c
new file mode 100644
index 0000000..ad666f7
--- /dev/null
+++ b/usr.bin/mesg/mesg.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 1987, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1987, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)mesg.c	8.2 (Berkeley) 1/21/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	struct stat sb;
+	char *tty;
+	int ch;
+
+	while ((ch = getopt(argc, argv, "")) != EOF)
+		switch (ch) {
+		case '?':
+		default:
+			goto usage;
+		}
+	argc -= optind;
+	argv += optind;
+
+	if ((tty = ttyname(STDERR_FILENO)) == NULL)
+		err(1, "ttyname");
+	if (stat(tty, &sb) < 0)
+		err(1, "%s", tty);
+
+	if (*argv == NULL) {
+		if (sb.st_mode & S_IWGRP) {
+			(void)fprintf(stderr, "is y\n");
+			exit(0);
+		}
+		(void)fprintf(stderr, "is n\n");
+		exit(1);
+	}
+
+	switch (*argv[0]) {
+	case 'y':
+		if (chmod(tty, sb.st_mode | S_IWGRP) < 0)
+			err(1, "%s", tty);
+		exit(0);
+	case 'n':
+		if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0)
+			err(1, "%s", tty);
+		exit(1);
+	}
+
+usage:	(void)fprintf(stderr, "usage: mesg [y | n]\n");
+	exit(2);
+}