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().
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@ -53,7 +53,6 @@ fhandler_console::console_state NO_COPY *fhandler_console::shared_console_info;
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bool NO_COPY fhandler_console::invisible_console;
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static DWORD orig_conin_mode = (DWORD) -1;
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static DWORD orig_conout_mode = (DWORD) -1;
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/* con_ra is shared in the same process.
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@ -361,6 +360,9 @@ fix_tab_position (HANDLE h, SHORT width)
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__small_sprintf (buf+strlen (buf), "\033[%d;%dH\033H", 1, col+1);
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/* Restore cursor position */
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__small_sprintf (buf+strlen (buf), "\0338");
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DWORD dwMode;
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GetConsoleMode (h, &dwMode);
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SetConsoleMode (h, dwMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
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DWORD dwLen;
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WriteConsole (h, buf, strlen (buf), &dwLen, 0);
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}
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@ -425,12 +427,19 @@ fhandler_console::read (void *pv, size_t& buflen)
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set_input_state ();
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DWORD dwMode;
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GetConsoleMode (get_handle (), &dwMode);
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/* if system has 24 bit color capability, use xterm compatible mode. */
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if (wincap.has_con_24bit_colors () && !con_is_legacy)
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SetConsoleMode (get_handle (), dwMode | ENABLE_VIRTUAL_TERMINAL_INPUT);
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while (!input_ready && !get_cons_readahead_valid ())
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{
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int bgres;
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if ((bgres = bg_check (SIGTTIN)) <= bg_eof)
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{
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buflen = bgres;
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SetConsoleMode (get_handle (), dwMode); /* Restore */
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return;
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}
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@ -448,6 +457,7 @@ fhandler_console::read (void *pv, size_t& buflen)
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case WAIT_TIMEOUT:
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set_sig_errno (EAGAIN);
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buflen = (size_t) -1;
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SetConsoleMode (get_handle (), dwMode); /* Restore */
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return;
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default:
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goto err;
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@ -495,30 +505,24 @@ fhandler_console::read (void *pv, size_t& buflen)
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#undef buf
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buflen = copied_chars;
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SetConsoleMode (get_handle (), dwMode); /* Restore */
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return;
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err:
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__seterrno ();
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buflen = (size_t) -1;
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SetConsoleMode (get_handle (), dwMode); /* Restore */
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return;
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sig_exit:
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set_sig_errno (EINTR);
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buflen = (size_t) -1;
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SetConsoleMode (get_handle (), dwMode); /* Restore */
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}
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fhandler_console::input_states
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fhandler_console::process_input_message (void)
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{
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if (wincap.has_con_24bit_colors () && !con_is_legacy)
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{
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DWORD dwMode;
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/* Enable xterm compatible mode in input */
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GetConsoleMode (get_handle (), &dwMode);
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dwMode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
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SetConsoleMode (get_handle (), dwMode);
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}
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char tmp[60];
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if (!shared_console_info)
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@ -1047,29 +1051,26 @@ fhandler_console::open (int flags, mode_t)
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get_ttyp ()->rstcons (false);
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set_open_status ();
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if (orig_conin_mode == (DWORD) -1)
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GetConsoleMode (get_handle (), &orig_conin_mode);
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if (orig_conout_mode == (DWORD) -1)
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GetConsoleMode (get_output_handle (), &orig_conout_mode);
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if (getpid () == con.owner && wincap.has_con_24bit_colors ())
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{
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bool is_legacy = false;
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DWORD dwMode;
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/* Enable xterm compatible mode in output */
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/* Check xterm compatible mode in output */
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GetConsoleMode (get_output_handle (), &dwMode);
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dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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if (!SetConsoleMode (get_output_handle (), dwMode))
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con.is_legacy = true;
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else
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con.is_legacy = false;
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/* Enable xterm compatible mode in input */
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if (!con_is_legacy)
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{
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GetConsoleMode (get_handle (), &dwMode);
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dwMode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
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if (!SetConsoleMode (get_handle (), dwMode))
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con.is_legacy = true;
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}
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if (!SetConsoleMode (get_output_handle (),
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dwMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING))
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is_legacy = true;
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SetConsoleMode (get_output_handle (), dwMode);
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/* Check xterm compatible mode in input */
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GetConsoleMode (get_handle (), &dwMode);
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if (!SetConsoleMode (get_handle (),
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dwMode | ENABLE_VIRTUAL_TERMINAL_INPUT))
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is_legacy = true;
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SetConsoleMode (get_handle (), dwMode);
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con.is_legacy = is_legacy;
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extern int sawTERM;
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if (con_is_legacy && !sawTERM)
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setenv ("TERM", "cygwin", 1);
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@ -1102,19 +1103,12 @@ fhandler_console::close ()
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{
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debug_printf ("closing: %p, %p", get_handle (), get_output_handle ());
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CloseHandle (input_mutex);
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input_mutex = NULL;
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CloseHandle (output_mutex);
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output_mutex = NULL;
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acquire_output_mutex (INFINITE);
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if (shared_console_info && getpid () == con.owner &&
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wincap.has_con_24bit_colors () && !con_is_legacy)
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{
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DWORD dwMode;
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/* Disable xterm compatible mode in input */
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GetConsoleMode (get_handle (), &dwMode);
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dwMode &= ~ENABLE_VIRTUAL_TERMINAL_INPUT;
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SetConsoleMode (get_handle (), dwMode);
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/* Disable xterm compatible mode in output */
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GetConsoleMode (get_output_handle (), &dwMode);
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dwMode &= ~ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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@ -1127,12 +1121,15 @@ fhandler_console::close ()
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status = NtQueryObject (get_handle (), ObjectBasicInformation,
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&obi, sizeof obi, NULL);
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if (NT_SUCCESS (status) && obi.HandleCount == 1)
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{
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if (orig_conin_mode != (DWORD) -1)
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SetConsoleMode (get_handle (), orig_conin_mode);
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if (orig_conout_mode != (DWORD) -1)
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SetConsoleMode (get_handle (), orig_conout_mode);
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}
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if (orig_conout_mode != (DWORD) -1)
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SetConsoleMode (get_handle (), orig_conout_mode);
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release_output_mutex ();
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CloseHandle (input_mutex);
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input_mutex = NULL;
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CloseHandle (output_mutex);
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output_mutex = NULL;
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CloseHandle (get_handle ());
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CloseHandle (get_output_handle ());
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@ -1270,13 +1267,6 @@ fhandler_console::output_tcsetattr (int, struct termios const *t)
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acquire_output_mutex (INFINITE);
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DWORD flags = ENABLE_PROCESSED_OUTPUT | ENABLE_WRAP_AT_EOL_OUTPUT;
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/* If system has 24 bit color capability, use xterm compatible mode. */
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if (wincap.has_con_24bit_colors () && !con_is_legacy)
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{
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flags |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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if (!(t->c_oflag & OPOST) || !(t->c_oflag & ONLCR))
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flags |= DISABLE_NEWLINE_AUTO_RETURN;
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}
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int res = SetConsoleMode (get_output_handle (), flags) ? 0 : -1;
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if (res)
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@ -1338,9 +1328,6 @@ fhandler_console::input_tcsetattr (int, struct termios const *t)
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flags |= ENABLE_WINDOW_INPUT |
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((wincap.has_con_24bit_colors () && !con_is_legacy) ?
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0 : ENABLE_MOUSE_INPUT);
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/* if system has 24 bit color capability, use xterm compatible mode. */
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if (wincap.has_con_24bit_colors () && !con_is_legacy)
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flags |= ENABLE_VIRTUAL_TERMINAL_INPUT;
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int res;
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if (flags == oflags)
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@ -2716,6 +2703,20 @@ fhandler_console::write (const void *vsrc, size_t len)
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push_process_state process_state (PID_TTYOU);
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acquire_output_mutex (INFINITE);
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/* If system has 24 bit color capability, use xterm compatible mode. */
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if (wincap.has_con_24bit_colors () && !con_is_legacy)
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{
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DWORD dwMode;
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GetConsoleMode (get_output_handle (), &dwMode);
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dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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if (!(get_ttyp ()->ti.c_oflag & OPOST) ||
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!(get_ttyp ()->ti.c_oflag & ONLCR))
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dwMode |= DISABLE_NEWLINE_AUTO_RETURN;
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else
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dwMode &= ~DISABLE_NEWLINE_AUTO_RETURN;
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SetConsoleMode (get_output_handle (), dwMode);
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}
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/* Run and check for ansi sequences */
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unsigned const char *src = (unsigned char *) vsrc;
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unsigned const char *end = src + len;
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@ -1075,19 +1075,49 @@ verify_console (select_record *me, fd_set *rfds, fd_set *wfds,
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return peek_console (me, true);
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}
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static int
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console_startup (select_record *me, select_stuff *stuff)
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{
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select_record *s = stuff->start.next;
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if (wincap.has_con_24bit_colors ())
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{
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DWORD dwMode;
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GetConsoleMode (s->h, &dwMode);
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/* Enable xterm compatible mode in input */
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dwMode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
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SetConsoleMode (s->h, dwMode);
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}
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return 1;
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}
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static void
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console_cleanup (select_record *me, select_stuff *stuff)
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{
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select_record *s = stuff->start.next;
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if (wincap.has_con_24bit_colors ())
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{
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DWORD dwMode;
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GetConsoleMode (s->h, &dwMode);
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/* Disable xterm compatible mode in input */
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dwMode &= ~ENABLE_VIRTUAL_TERMINAL_INPUT;
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SetConsoleMode (s->h, dwMode);
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}
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}
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select_record *
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fhandler_console::select_read (select_stuff *ss)
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{
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select_record *s = ss->start.next;
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if (!s->startup)
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{
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s->startup = no_startup;
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s->startup = console_startup;
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s->verify = verify_console;
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set_cursor_maybe ();
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}
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s->peek = peek_console;
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s->h = get_handle ();
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s->cleanup = console_cleanup;
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s->read_selected = true;
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s->read_ready = input_ready || get_cons_readahead_valid ();
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return s;
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@ -615,22 +615,13 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
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{
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attach_to_console = true;
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if (wincap.has_con_24bit_colors () && !iscygwin ())
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{
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DWORD dwMode;
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if (fd == 0)
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{
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/* Disable xterm compatible mode in input */
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GetConsoleMode (fh->get_handle (), &dwMode);
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dwMode &= ~ENABLE_VIRTUAL_TERMINAL_INPUT;
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SetConsoleMode (fh->get_handle (), dwMode);
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}
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else
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{
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GetConsoleMode (fh->get_output_handle (), &dwMode);
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dwMode &= ~ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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SetConsoleMode (fh->get_output_handle (), dwMode);
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}
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}
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if (fd == 1 || fd == 2)
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{
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DWORD dwMode;
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GetConsoleMode (fh->get_output_handle (), &dwMode);
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dwMode &= ~ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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SetConsoleMode (fh->get_output_handle (), dwMode);
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}
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}
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}
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