From 01ee219f01eba44d2967ed9200909193d2d47926 Mon Sep 17 00:00:00 2001
From: Mark Pizzolato <mark@infocomm.com>
Date: Fri, 22 Mar 2013 10:28:09 -0700
Subject: [PATCH] Fixed some HP-UX serial I/O functionality from Mikulas
 Patocka

We need to set buffer to 1 character and turn off the timeout.
Otherwise, HP-UX buffers 4 characters before making them available
to read().
---
 sim_serial.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sim_serial.c b/sim_serial.c
index 90f67539..444d9bc6 100644
--- a/sim_serial.c
+++ b/sim_serial.c
@@ -1052,6 +1052,12 @@ tio.c_iflag = (tio.c_iflag & ~i_clear) | i_set;           /* configure the seria
 tio.c_oflag = (tio.c_oflag & ~o_clear) | o_set;
 tio.c_cflag = (tio.c_cflag & ~c_clear) | c_set;
 tio.c_lflag = (tio.c_lflag & ~l_clear) | l_set;
+#ifdef VMIN
+tio.c_cc[VMIN] = 1;
+#endif
+#ifdef VTIME
+tio.c_cc[VTIME] = 0;
+#endif
 
 #elif 0