From 5fd83771641d15c418f747bd343ba6738d3875f7 Mon Sep 17 00:00:00 2001
From: Cameron Katri <me@cameronkatri.com>
Date: Sun, 9 May 2021 14:20:58 -0400
Subject: Import macOS userland

adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106
---
 adv_cmds/tty/tty.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 adv_cmds/tty/tty.c

(limited to 'adv_cmds/tty/tty.c')

diff --git a/adv_cmds/tty/tty.c b/adv_cmds/tty/tty.c
new file mode 100644
index 0000000..806fe4b
--- /dev/null
+++ b/adv_cmds/tty/tty.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 1988, 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.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1988, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)tty.c	8.1 (Berkeley) 6/6/93";
+#endif
+#endif /* not lint */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/usr.bin/tty/tty.c,v 1.9 2002/05/29 17:12:30 jmallett Exp $");
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+	int ch, sflag;
+	char *t;
+
+	sflag = 0;
+	while ((ch = getopt(argc, argv, "s")) != -1)
+		switch (ch) {
+		case 's':
+			sflag = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+
+	t = ttyname(0);
+	if (!sflag)
+		puts(t ? t : "not a tty");
+	exit(t ? 0 : 1);
+}
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage: tty [-s]\n");
+	exit(2);
+}
-- 
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