auto import from //depot/cupcake/@135843
diff --git a/libc/include/sgtty.h b/libc/include/sgtty.h
new file mode 100644
index 0000000..1ac3100
--- /dev/null
+++ b/libc/include/sgtty.h
@@ -0,0 +1,48 @@
+/* $NetBSD: sgtty.h,v 1.8 2005/02/03 04:39:32 perry Exp $ */
+
+/*
+ * Copyright (c) 1985, 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. 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.
+ *
+ * @(#)sgtty.h 8.1 (Berkeley) 6/2/93
+ */
+
+#ifndef _SGTTY_H_
+#define _SGTTY_H_
+
+#ifndef USE_OLD_TTY
+#define USE_OLD_TTY
+#endif
+#include <sys/ioctl.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+int gtty(int, struct sgttyb *);
+int stty(int, struct sgttyb *);
+__END_DECLS
+
+#endif /* _SGTTY_H_ */