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Cygwin: console: Change timing of set/unset xterm compatible mode. 

- If two cygwin programs are executed simultaneousley with pipes
  in cmd.exe, xterm compatible mode is accidentally disabled by
  the process which ends first. After that, escape sequences are
  not handled correctly in the other app. This is the problem 2
  reported in https://cygwin.com/ml/cygwin/2020-02/msg00116.html.
  This patch fixes the issue. This patch also fixes the problem 3.
  For these issues, the timing of setting and unsetting xterm
  compatible mode is changed. For read, xterm compatible mode is
  enabled only within read() or select() functions. For write, it
  is enabled every time write() is called, and restored on close().
This commit is contained in:
Takashi Yano 2020-02-17 19:29:07 +09:00 committed by Corinna Vinschen
parent bb25dd1b0f
commit 774b8996d1
3 changed files with 89 additions and 67 deletions
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95
winsup/cygwin/fhandler_console.cc
View File

@ -53,7 +53,6 @@ fhandler_console::console_state NO_COPY *fhandler_console::shared_console_info;
bool NO_COPY fhandler_console::invisible_console;
static DWORD orig_conin_mode = (DWORD) -1;
static DWORD orig_conout_mode = (DWORD) -1;
/* con_ra is shared in the same process.
@ -361,6 +360,9 @@ fix_tab_position (HANDLE h, SHORT width)
__small_sprintf (buf+strlen (buf), "\033[%d;%dH\033H", 1, col+1);
/* Restore cursor position */
__small_sprintf (buf+strlen (buf), "\0338");
DWORD dwMode;
GetConsoleMode (h, &dwMode);
SetConsoleMode (h, dwMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
DWORD dwLen;
WriteConsole (h, buf, strlen (buf), &dwLen, 0);
}
@ -425,12 +427,19 @@ fhandler_console::read (void *pv, size_t& buflen)
set_input_state ();
DWORD dwMode;
GetConsoleMode (get_handle (), &dwMode);
/* if system has 24 bit color capability, use xterm compatible mode. */
if (wincap.has_con_24bit_colors () && !con_is_legacy)
SetConsoleMode (get_handle (), dwMode | ENABLE_VIRTUAL_TERMINAL_INPUT);
while (!input_ready && !get_cons_readahead_valid ())
{
int bgres;
if ((bgres = bg_check (SIGTTIN)) <= bg_eof)
{
buflen = bgres;
SetConsoleMode (get_handle (), dwMode); /* Restore */
return;
}
@ -448,6 +457,7 @@ fhandler_console::read (void *pv, size_t& buflen)
case WAIT_TIMEOUT:
set_sig_errno (EAGAIN);
buflen = (size_t) -1;
SetConsoleMode (get_handle (), dwMode); /* Restore */
return;
default:
goto err;
@ -495,30 +505,24 @@ fhandler_console::read (void *pv, size_t& buflen)
#undef buf
buflen = copied_chars;
SetConsoleMode (get_handle (), dwMode); /* Restore */
return;
err:
__seterrno ();
buflen = (size_t) -1;
SetConsoleMode (get_handle (), dwMode); /* Restore */
return;
sig_exit:
set_sig_errno (EINTR);
buflen = (size_t) -1;
SetConsoleMode (get_handle (), dwMode); /* Restore */
}
fhandler_console::input_states
fhandler_console::process_input_message (void)
{
if (wincap.has_con_24bit_colors () && !con_is_legacy)
{
DWORD dwMode;
/* Enable xterm compatible mode in input */
GetConsoleMode (get_handle (), &dwMode);
dwMode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
SetConsoleMode (get_handle (), dwMode);
}
char tmp[60];
if (!shared_console_info)
@ -1047,29 +1051,26 @@ fhandler_console::open (int flags, mode_t)
get_ttyp ()->rstcons (false);
set_open_status ();
if (orig_conin_mode == (DWORD) -1)
GetConsoleMode (get_handle (), &orig_conin_mode);
if (orig_conout_mode == (DWORD) -1)
GetConsoleMode (get_output_handle (), &orig_conout_mode);
if (getpid () == con.owner && wincap.has_con_24bit_colors ())
{
bool is_legacy = false;
DWORD dwMode;
/* Enable xterm compatible mode in output */
/* Check xterm compatible mode in output */
GetConsoleMode (get_output_handle (), &dwMode);
dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if (!SetConsoleMode (get_output_handle (), dwMode))
con.is_legacy = true;
else
con.is_legacy = false;
/* Enable xterm compatible mode in input */
if (!con_is_legacy)
{
if (!SetConsoleMode (get_output_handle (),
dwMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING))
is_legacy = true;
SetConsoleMode (get_output_handle (), dwMode);
/* Check xterm compatible mode in input */
GetConsoleMode (get_handle (), &dwMode);
dwMode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
if (!SetConsoleMode (get_handle (), dwMode))
con.is_legacy = true;
}
if (!SetConsoleMode (get_handle (),
dwMode | ENABLE_VIRTUAL_TERMINAL_INPUT))
is_legacy = true;
SetConsoleMode (get_handle (), dwMode);
con.is_legacy = is_legacy;
extern int sawTERM;
if (con_is_legacy && !sawTERM)
setenv ("TERM", "cygwin", 1);
@ -1102,19 +1103,12 @@ fhandler_console::close ()
{
debug_printf ("closing: %p, %p", get_handle (), get_output_handle ());
CloseHandle (input_mutex);
input_mutex = NULL;
CloseHandle (output_mutex);
output_mutex = NULL;
acquire_output_mutex (INFINITE);
if (shared_console_info && getpid () == con.owner &&
wincap.has_con_24bit_colors () && !con_is_legacy)
{
DWORD dwMode;
/* Disable xterm compatible mode in input */
GetConsoleMode (get_handle (), &dwMode);
dwMode &= ~ENABLE_VIRTUAL_TERMINAL_INPUT;
SetConsoleMode (get_handle (), dwMode);
/* Disable xterm compatible mode in output */
GetConsoleMode (get_output_handle (), &dwMode);
dwMode &= ~ENABLE_VIRTUAL_TERMINAL_PROCESSING;
@ -1127,12 +1121,15 @@ fhandler_console::close ()
status = NtQueryObject (get_handle (), ObjectBasicInformation,
&obi, sizeof obi, NULL);
if (NT_SUCCESS (status) && obi.HandleCount == 1)
{
if (orig_conin_mode != (DWORD) -1)
SetConsoleMode (get_handle (), orig_conin_mode);
if (orig_conout_mode != (DWORD) -1)
SetConsoleMode (get_handle (), orig_conout_mode);
}
release_output_mutex ();
CloseHandle (input_mutex);
input_mutex = NULL;
CloseHandle (output_mutex);
output_mutex = NULL;
CloseHandle (get_handle ());
CloseHandle (get_output_handle ());
@ -1270,13 +1267,6 @@ fhandler_console::output_tcsetattr (int, struct termios const *t)
acquire_output_mutex (INFINITE);
DWORD flags = ENABLE_PROCESSED_OUTPUT | ENABLE_WRAP_AT_EOL_OUTPUT;
/* If system has 24 bit color capability, use xterm compatible mode. */
if (wincap.has_con_24bit_colors () && !con_is_legacy)
{
flags |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if (!(t->c_oflag & OPOST) || !(t->c_oflag & ONLCR))
flags |= DISABLE_NEWLINE_AUTO_RETURN;
}
int res = SetConsoleMode (get_output_handle (), flags) ? 0 : -1;
if (res)
@ -1338,9 +1328,6 @@ fhandler_console::input_tcsetattr (int, struct termios const *t)
flags |= ENABLE_WINDOW_INPUT |
((wincap.has_con_24bit_colors () && !con_is_legacy) ?
0 : ENABLE_MOUSE_INPUT);
/* if system has 24 bit color capability, use xterm compatible mode. */
if (wincap.has_con_24bit_colors () && !con_is_legacy)
flags |= ENABLE_VIRTUAL_TERMINAL_INPUT;
int res;
if (flags == oflags)
@ -2716,6 +2703,20 @@ fhandler_console::write (const void *vsrc, size_t len)
push_process_state process_state (PID_TTYOU);
acquire_output_mutex (INFINITE);
/* If system has 24 bit color capability, use xterm compatible mode. */
if (wincap.has_con_24bit_colors () && !con_is_legacy)
{
DWORD dwMode;
GetConsoleMode (get_output_handle (), &dwMode);
dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
if (!(get_ttyp ()->ti.c_oflag & OPOST) ||
!(get_ttyp ()->ti.c_oflag & ONLCR))
dwMode |= DISABLE_NEWLINE_AUTO_RETURN;
else
dwMode &= ~DISABLE_NEWLINE_AUTO_RETURN;
SetConsoleMode (get_output_handle (), dwMode);
}
/* Run and check for ansi sequences */
unsigned const char *src = (unsigned char *) vsrc;
unsigned const char *end = src + len;

32
winsup/cygwin/select.cc
View File

@ -1075,19 +1075,49 @@ verify_console (select_record *me, fd_set *rfds, fd_set *wfds,
return peek_console (me, true);
}
static int
console_startup (select_record *me, select_stuff *stuff)
{
select_record *s = stuff->start.next;
if (wincap.has_con_24bit_colors ())
{
DWORD dwMode;
GetConsoleMode (s->h, &dwMode);
/* Enable xterm compatible mode in input */
dwMode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
SetConsoleMode (s->h, dwMode);
}
return 1;
}
static void
console_cleanup (select_record *me, select_stuff *stuff)
{
select_record *s = stuff->start.next;
if (wincap.has_con_24bit_colors ())
{
DWORD dwMode;
GetConsoleMode (s->h, &dwMode);
/* Disable xterm compatible mode in input */
dwMode &= ~ENABLE_VIRTUAL_TERMINAL_INPUT;
SetConsoleMode (s->h, dwMode);
}
}
select_record *
fhandler_console::select_read (select_stuff *ss)
{
select_record *s = ss->start.next;
if (!s->startup)
{
s->startup = no_startup;
s->startup = console_startup;
s->verify = verify_console;
set_cursor_maybe ();
}
s->peek = peek_console;
s->h = get_handle ();
s->cleanup = console_cleanup;
s->read_selected = true;
s->read_ready = input_ready || get_cons_readahead_valid ();
return s;

11
winsup/cygwin/spawn.cc
View File

@ -615,24 +615,15 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
{
attach_to_console = true;
if (wincap.has_con_24bit_colors () && !iscygwin ())
if (fd == 1 || fd == 2)
{
DWORD dwMode;
if (fd == 0)
{
/* Disable xterm compatible mode in input */
GetConsoleMode (fh->get_handle (), &dwMode);
dwMode &= ~ENABLE_VIRTUAL_TERMINAL_INPUT;
SetConsoleMode (fh->get_handle (), dwMode);
}
else
{
GetConsoleMode (fh->get_output_handle (), &dwMode);
dwMode &= ~ENABLE_VIRTUAL_TERMINAL_PROCESSING;
SetConsoleMode (fh->get_output_handle (), dwMode);
}
}
}
}
/* Set up needed handles for stdio */
si.dwFlags = STARTF_USESTDHANDLES;