3 files changed, 10 insertions, 0 deletions

diff --git a/bin/stty/modes.c b/bin/stty/modes.c
index e34afb83ee38..0fe4e5168d2c 100644
--- a/bin/stty/modes.c
+++ b/bin/stty/modes.c
@@ -91,6 +91,8 @@ static const struct modes cmodes[] = {
 	{ "-rtsflow",	0, CRTS_IFLOW },
 	{ "mdmbuf",	MDMBUF, 0 },
 	{ "-mdmbuf",	0, MDMBUF },
+	{ "rtsdtr",	0, CNO_RTSDTR },
+	{ "-rtsdtr",	CNO_RTSDTR, 0 },
 	{ NULL,		0, 0 },
 };
 
diff --git a/bin/stty/print.c b/bin/stty/print.c
index 03d5c3b8a770..a76cd46b765e 100644
--- a/bin/stty/print.c
+++ b/bin/stty/print.c
@@ -184,6 +184,12 @@ print(struct termios *tp, struct winsize *wp, int ldisc, enum FMT fmt)
 	put("-dsrflow", CDSR_OFLOW, 0);
 	put("-dtrflow", CDTR_IFLOW, 0);
 	put("-mdmbuf", MDMBUF, 0);	/* XXX mdmbuf ==  dtrflow */
+	if (on(CNO_RTSDTR))
+		bput("-rtsdtr");
+	else {
+		if (fmt >= BSD)
+			bput("rtsdtr");
+	}
 
 	/* special control characters */
 	cc = tp->c_cc;
diff --git a/bin/stty/stty.1 b/bin/stty/stty.1
index a0f76fe2bfd1..1863c2286176 100644
--- a/bin/stty/stty.1
+++ b/bin/stty/stty.1
@@ -145,6 +145,8 @@ Assume a line without (with) modem
 control.
 .It Cm crtscts Pq Fl crtscts
 Enable (disable) RTS/CTS flow control.
+.It Cm rtsdtr Pq Fl -rtsdtr
+Enable (disable) asserting RTS/DTR on open.
 .El
 .Ss Input Modes:
 This corresponds to the c_iflag in the termios structure.