1 files changed, 65 insertions, 0 deletions
diff --git a/usr.bin/bc/tty.c b/usr.bin/bc/tty.c
new file mode 100644
index 0000000..05f9d14
--- /dev/null
+++ b/usr.bin/bc/tty.c
@@ -0,0 +1,65 @@
+/*	$FreeBSD$	*/
+/*      $OpenBSD: tty.c,v 1.2 2013/11/12 13:54:51 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 2013, Otto Moerbeek <otto@drijf.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <errno.h>
+#include <signal.h>
+#include <histedit.h>
+#include <termios.h>
+#include "extern.h"
+
+struct termios ttysaved, ttyedit;
+
+static int
+settty(struct termios *t)
+{
+	int ret;
+
+	while ((ret = tcsetattr(0, TCSADRAIN,  t) == -1) && errno == EINTR)
+		continue;
+	return ret;
+}
+
+int
+gettty(struct termios *t)
+{
+	int ret;
+
+	while ((ret = tcgetattr(0, t) == -1) && errno == EINTR)
+		continue;
+	return ret;
+}
+
+/* ARGSUSED */
+void
+tstpcont(int sig)
+{
+	int save_errno = errno;
+
+	if (sig == SIGTSTP) {
+		signal(SIGCONT, tstpcont);
+		gettty(&ttyedit);
+		settty(&ttysaved);		
+	} else {
+		signal(SIGTSTP, tstpcont);
+		settty(&ttyedit);		
+	}
+	signal(sig, SIG_DFL);
+	kill(0, sig);
+	errno = save_errno;
+}