patch 9.1.0321: Garbled output on serial terminals with XON/XOFF flow control
Problem: When used terminal with XON/XOFF flow control, vim tries to
still make CTRL-S mapping available, which results in severe
screen corruption, especially on large redraws, and even
spurious inputs (John Tsiombikas)
Solution: Disallow CTRL-S mapping if such terminal is recognized.
Don't remove IXON from the bitmask inversion.
(Anton Sharonov)
*** When started like this:
TERM=vt420 vim
:set termcap
shows "t_xon=y"
map <C-S> :echo "abc"<CR>
does nothing (after <C-S> output freezes and subsequent <C-Q>
unfreezes it)
*** When started like this:
TERM=xterm vim
:set termcap
shows "t_xon="
map <C-S> :echo "abc"<CR>
works (after <C-S> one see "abc" string echo-ed)
fixes: #12674
closes: #14542
Signed-off-by: Anton Sharonov <anton.sharonov@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/termdefs.h b/src/termdefs.h
index f28fd19..2b65abb 100644
--- a/src/termdefs.h
+++ b/src/termdefs.h
@@ -115,10 +115,11 @@
KS_SRI, // restore icon text
KS_FD, // disable focus event tracking
KS_FE, // enable focus event tracking
- KS_CF // set terminal alternate font
+ KS_CF, // set terminal alternate font
+ KS_XON // terminal uses xon/xoff handshaking
};
-#define KS_LAST KS_CF
+#define KS_LAST KS_XON
/*
* the terminal capabilities are stored in this array
@@ -224,6 +225,7 @@
#define T_SRI (TERM_STR(KS_SRI)) // restore icon text
#define T_FD (TERM_STR(KS_FD)) // disable focus event tracking
#define T_FE (TERM_STR(KS_FE)) // enable focus event tracking
+#define T_XON (TERM_STR(KS_XON)) // terminal uses xon/xoff handshaking
typedef enum {
TMODE_COOK, // terminal mode for external cmds and Ex mode