1 files changed, 79 insertions, 0 deletions
diff --git a/usr.bin/more/ttyin.c b/usr.bin/more/ttyin.c
new file mode 100644
index 0000000..52ff92e
--- /dev/null
+++ b/usr.bin/more/ttyin.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 1988 Mark Nudleman
+ * 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 char sccsid[] = "@(#)ttyin.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+/*
+ * Routines dealing with getting input from the keyboard (i.e. from the user).
+ */
+
+#include <less.h>
+
+static int tty;
+
+/*
+ * Open keyboard for input.
+ * (Just use file descriptor 2.)
+ */
+open_getchr()
+{
+	tty = 2;
+}
+
+/*
+ * Get a character from the keyboard.
+ */
+getchr()
+{
+	char c;
+	int result;
+
+	do
+	{
+		result = iread(tty, &c, 1);
+		if (result == READ_INTR)
+			return (READ_INTR);
+		if (result < 0)
+		{
+			/*
+			 * Don't call error() here,
+			 * because error calls getchr!
+			 */
+			quit();
+		}
+	} while (result != 1);
+	return (c & 0177);
+}