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Cygwin: console: Discard some unsupported escape sequences.

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- If the cygwin vim is started from a non-cygwin process which is
  executed in pseudo console, shift key and ctrl key do not work.
  In this case, vim is executed under /dev/cons*. If vim outputs
  escape sequence which is not supported by pseudo console, the
  escape sequence is leaked into the parent pty. This causes
  unexpected results. This patch fixes the issue by discarding
  "CSI > Pm m". "OSC 10;? BEL/ST" and "OSC 11;? BEL/ST" are
  discarded as well.
This commit is contained in:
Takashi Yano via Cygwin-patches 2020-05-31 14:53:18 +09:00 committed by Ken Brown
parent 32edd9570d
commit a615ec9d49
1 changed files with 38 additions and 16 deletions
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54
winsup/cygwin/fhandler_console.cc
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@ -2186,6 +2186,14 @@ fhandler_console::char_command (char c)
/* Just send the sequence */
wpbuf.send (get_output_handle ());
break;
case 'm':
if (con.saw_greater_than_sign)
break; /* Ignore unsupported CSI > Pm m */
/* Text attribute settings */
wpbuf.put (c);
/* Just send the sequence */
wpbuf.send (get_output_handle ());
break;
default:
/* Other escape sequences */
wpbuf.put (c);
@ -3077,6 +3085,13 @@ fhandler_console::write (const void *vsrc, size_t len)
con.state = normal;
wpbuf.empty();
}
else if (*src == ']') /* OSC Operating System Command */
{
wpbuf.put (*src);
con.rarg = 0;
con.my_title_buf[0] = '\0';
con.state = gotrsquare;
}
else if (wincap.has_con_24bit_colors () && !con_is_legacy)
{
if (*src == 'c') /* RIS Full reset */
@ -3095,13 +3110,6 @@ fhandler_console::write (const void *vsrc, size_t len)
con.state = normal;
wpbuf.empty();
}
else if (*src == ']') /* OSC Operating System Command */
{
wpbuf.put (*src);
con.rarg = 0;
con.my_title_buf[0] = '\0';
con.state = gotrsquare;
}
else if (*src == '(') /* Designate G0 character set */
{
wpbuf.put (*src);
@ -3179,7 +3187,8 @@ fhandler_console::write (const void *vsrc, size_t len)
con.rarg = con.rarg * 10 + (*src - '0');
else if (*src == ';' && (con.rarg == 2 || con.rarg == 0))
con.state = gettitle;
else if (*src == ';' && (con.rarg == 4 || con.rarg == 104))
else if (*src == ';' && (con.rarg == 4 || con.rarg == 104
|| (con.rarg >= 10 && con.rarg <= 19)))
con.state = eatpalette;
else
con.state = eattitle;
@ -3189,10 +3198,13 @@ fhandler_console::write (const void *vsrc, size_t len)
case eattitle:
case gettitle:
{
wpbuf.put (*src);
int n = strlen (con.my_title_buf);
if (*src < ' ')
{
if (*src == '\007' && con.state == gettitle)
if (wincap.has_con_24bit_colors () && !con_is_legacy)
wpbuf.send (get_output_handle ());
else if (*src == '\007' && con.state == gettitle)
set_console_title (con.my_title_buf);
con.state = normal;
wpbuf.empty();
@ -3201,27 +3213,37 @@ fhandler_console::write (const void *vsrc, size_t len)
{
con.my_title_buf[n++] = *src;
con.my_title_buf[n] = '\0';
wpbuf.put (*src);
}
src++;
break;
}
case eatpalette:
if (*src == '\033')
{
wpbuf.put (*src);
con.state = endpalette;
}
wpbuf.put (*src);
if (*src == '?')
con.saw_question_mark = true;
else if (*src == '\033')
con.state = endpalette;
else if (*src == '\a')
{
/* Send OSC Ps; Pt BEL other than OSC Ps; ? BEL */
if (wincap.has_con_24bit_colors () && !con_is_legacy
&& !con.saw_question_mark)
wpbuf.send (get_output_handle ());
con.state = normal;
wpbuf.empty();
}
src++;
break;
case endpalette:
wpbuf.put (*src);
if (*src == '\\')
con.state = normal;
{
/* Send OSC Ps; Pt ST other than OSC Ps; ? ST */
if (wincap.has_con_24bit_colors () && !con_is_legacy
&& !con.saw_question_mark)
wpbuf.send (get_output_handle ());
con.state = normal;
}
else
/* Sequence error (abort) */
con.state = normal;