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/term.c b/src/term.c
index 8aa86ce..7e39b03 100644
--- a/src/term.c
+++ b/src/term.c
@@ -1798,6 +1798,8 @@
T_DA = (char_u *)"y";
if ((T_UT == NULL || T_UT == empty_option) && tgetflag("ut") > 0)
T_UT = (char_u *)"y";
+ if ((T_XON == NULL || T_XON == empty_option) && tgetflag("xo") > 0)
+ T_XON = (char_u *)"y";
/*
* get key codes