diff --git a/libc/include/sys/ttydefaults.h b/libc/include/sys/ttydefaults.h
new file mode 100644
index 0000000..405e759
--- /dev/null
+++ b/libc/include/sys/ttydefaults.h
@@ -0,0 +1,115 @@
+/*	$NetBSD: ttydefaults.h,v 1.16 2008/05/24 14:06:39 yamt Exp $	*/
+
+/*-
+ * Copyright (c) 1982, 1986, 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. 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.
+ *
+ *	@(#)ttydefaults.h	8.4 (Berkeley) 1/21/94
+ */
+
+/*
+ * System wide defaults for terminal state.
+ */
+#ifndef _SYS_TTYDEFAULTS_H_
+#define	_SYS_TTYDEFAULTS_H_
+
+/*
+ * Defaults on "first" open.
+ */
+#define	TTYDEF_IFLAG	(BRKINT | ICRNL | IMAXBEL | IXON | IXANY)
+#define TTYDEF_OFLAG	(OPOST | ONLCR | OXTABS)
+#define TTYDEF_LFLAG	(ECHO | ICANON | ISIG | IEXTEN | ECHOE|ECHOKE|ECHOCTL)
+#define TTYDEF_CFLAG	(CREAD | CS8 | HUPCL)
+#define TTYDEF_SPEED	(B9600)
+
+/*
+ * Control Character Defaults
+ */
+#define CTRL(x)	(x&037)
+#define	CEOF		CTRL('d')
+#define	CEOL		((unsigned char)'\377')	/* XXX avoid _POSIX_VDISABLE */
+#define	CERASE		0177
+#define	CINTR		CTRL('c')
+#define	CSTATUS		CTRL('t')
+#define	CKILL		CTRL('u')
+#define	CMIN		1
+#define	CQUIT		034		/* FS, ^\ */
+#define	CSUSP		CTRL('z')
+#define	CTIME		0
+#define	CDSUSP		CTRL('y')
+#define	CSTART		CTRL('q')
+#define	CSTOP		CTRL('s')
+#define	CLNEXT		CTRL('v')
+#define	CDISCARD 	CTRL('o')
+#define	CWERASE 	CTRL('w')
+#define	CREPRINT 	CTRL('r')
+#define	CEOT		CEOF
+/* compat */
+#define	CBRK		CEOL
+#define CRPRNT		CREPRINT
+#define	CFLUSH		CDISCARD
+
+/* PROTECTED INCLUSION ENDS HERE */
+#endif /* !_SYS_TTYDEFAULTS_H_ */
+
+/*
+ * #define TTYDEFCHARS to include an array of default control characters.
+ */
+#ifdef _KERNEL
+#ifdef TTYDEFCHARS
+const cc_t ttydefchars[NCCS] = {
+	[VEOF] = CEOF,
+	[VEOL] = CEOL,
+	[VEOL2] = CEOL,
+	[VERASE] = CERASE,
+	[VWERASE] = CWERASE,
+	[VKILL] = CKILL,
+	[VREPRINT] = CREPRINT,
+	[7] = _POSIX_VDISABLE,	/* spare */
+	[VINTR] = CINTR,
+	[VQUIT] = CQUIT,
+	[VSUSP] = CSUSP,
+	[VDSUSP] = CDSUSP,
+	[VSTART] = CSTART,
+	[VSTOP] = CSTOP,
+	[VLNEXT] = CLNEXT,
+	[VDISCARD] = CDISCARD,
+	[VMIN] = CMIN,
+	[VTIME] = CTIME,
+	[VSTATUS] = CSTATUS,
+	[19] = _POSIX_VDISABLE,	/* spare */
+};
+#undef TTYDEFCHARS
+#else
+extern const cc_t ttydefchars[NCCS];
+#endif
+#endif /* _KERNEL */