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Cygwin: pty: Fix a bug regarding ESC[?3h and ESC[?3l handling. 

- Midnight commander (mc) does not work after the commit
  1626569222 as reported in
  https://www.cygwin.com/ml/cygwin/2019-12/msg00173.html.
  This patch fixes the issue.
This commit is contained in:
Takashi Yano 2019-12-19 01:07:33 +09:00 committed by Corinna Vinschen
parent 91f1eab9a9
commit fe512b2b12
1 changed files with 5 additions and 2 deletions
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7
winsup/cygwin/fhandler_tty.cc
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@ -1262,16 +1262,19 @@ fhandler_pty_slave::push_to_pcon_screenbuffer (const char *ptr, size_t len)
while ((p0 = (char *) memmem (p0, nlen - (p0 - buf), "\033[?", 3)))
{
p0 += 3;
while (p0 < buf + nlen && *p0 != 'h' && *p0 != 'l')
bool exist_arg_3 = false;
while (p0 < buf + nlen && !isalpha (*p0))
{
int arg = 0;
while (p0 < buf + nlen && isdigit (*p0))
arg = arg * 10 + (*p0 ++) - '0';
if (arg == 3)
get_ttyp ()->need_redraw_screen = true;
exist_arg_3 = true;
if (p0 < buf + nlen && *p0 == ';')
p0 ++;
}
if (p0 < buf + nlen && exist_arg_3 && (*p0 == 'h' || *p0 == 'l'))
get_ttyp ()->need_redraw_screen = true;
p0 ++;
if (p0 >= buf + nlen)
break;