From 1d10976c161cfb2e7ec114b7c72885e6f195a3d5 Mon Sep 17 00:00:00 2001
From: Damien Miller <djm@mindrot.org>
Date: Tue, 16 Aug 2005 21:32:09 +1000
Subject: [PATCH]  - (djm) [ttymodes.c] bugzilla #1054: Fix encoding of
 _POSIX_VDISABLE,    from Jacob Nevins; ok dtucker@

---
 ChangeLog  |  6 +++++-
 ttymodes.c | 30 ++++++++++++++++++++++++++++--
 2 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 1eba83b1c..e77dd1f4d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+20050816
+ - (djm) [ttymodes.c] bugzilla #1054: Fix encoding of _POSIX_VDISABLE,
+   from Jacob Nevins; ok dtucker@
+
 20050815
  - (tim) [sftp.c] wrap el_end() in #ifdef USE_LIBEDIT
  - (tim) [configure.ac] corrections to libedit tests. Report and patches
@@ -2937,4 +2941,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.3873 2005/08/16 00:48:40 tim Exp $
+$Id: ChangeLog,v 1.3874 2005/08/16 11:32:09 djm Exp $
diff --git a/ttymodes.c b/ttymodes.c
index c32e213a4..cf4c7d5c6 100644
--- a/ttymodes.c
+++ b/ttymodes.c
@@ -240,6 +240,32 @@ baud_to_speed(int baud)
 	}
 }
 
+/*
+ * Encode a special character into SSH line format.
+ */
+static u_int
+special_char_encode(cc_t c)
+{
+#ifdef _POSIX_VDISABLE
+	if (c == _POSIX_VDISABLE)
+		return 255;
+#endif /* _POSIX_VDISABLE */
+	return c;
+}
+
+/*
+ * Decode a special character from SSH line format.
+ */
+static cc_t
+special_char_decode(u_int c)
+{
+#ifdef _POSIX_VDISABLE
+	if (c == 255)
+		return _POSIX_VDISABLE;
+#endif /* _POSIX_VDISABLE */
+	return c;
+}
+
 /*
  * Encodes terminal modes for the terminal referenced by fd
  * or tiop in a portable manner, and appends the modes to a packet
@@ -287,7 +313,7 @@ tty_make_modes(int fd, struct termios *tiop)
 #define TTYCHAR(NAME, OP) \
 	debug3("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
 	buffer_put_char(&buf, OP); \
-	put_arg(&buf, tio.c_cc[NAME]);
+	put_arg(&buf, special_char_encode(tio.c_cc[NAME]));
 
 #define TTYMODE(NAME, FIELD, OP) \
 	debug3("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
@@ -375,7 +401,7 @@ tty_parse_modes(int fd, int *n_bytes_ptr)
 #define TTYCHAR(NAME, OP) \
 	case OP: \
 	  n_bytes += arg_size; \
-	  tio.c_cc[NAME] = get_arg(); \
+	  tio.c_cc[NAME] = special_char_decode(get_arg()); \
 	  debug3("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
 	  break;
 #define TTYMODE(NAME, FIELD, OP) \