Cygwin: console: Call set_input_mode() after changing disable_master_thread

With the commit 476135a24506, set_input_mode() reffers to the flag
disable_master_thread in tty::cygwin mode. So it is necessary to call
set_input_mode() after changing disable_master_thread flag. However,
the commit 476135a24506 was missing that.

With this patch, set_input_mode() is called after changing the flag
disable_master_thread, if the console input mode is tty::cygwin.

Fixes: 476135a24506 ("Cygwin: console: Set ENABLE_PROCESSED_INPUT when disable_master_thread");
Signed-off-by: Takashi Yano <[email protected]>
Cherry-picked-from: 65a48c7202 (Cygwin: console: Call set_input_mode() after changing disable_master_thread, 2025-07-03)
Signed-off-by: Johannes Schindelin <[email protected]>

Author: tyan0

winsup/cygwin/fhandler/console.cc

@@ -923,12 +923,12 @@ fhandler_console::cleanup_for_non_cygwin_app (handle_set_t *p)
   termios *ti = shared_console_info[unit] ?
     &(shared_console_info[unit]->tty_min_state.ti) : &dummy;
   /* Cleaning-up console mode for non-cygwin app. */
+  set_disable_master_thread (con.owner == GetCurrentProcessId ());
   /* conmode can be tty::restore when non-cygwin app is
      exec'ed from login shell. */
   tty::cons_mode conmode = cons_mode_on_close (p);
   set_output_mode (conmode, ti, p);
   set_input_mode (conmode, ti, p);
-  set_disable_master_thread (con.owner == GetCurrentProcessId ());
 }
 
 /* Return the tty structure associated with a given tty number.  If the
@@ -1121,8 +1121,8 @@ fhandler_console::bg_check (int sig, bool dontsignal)
      in the same process group. */
   if (sig == SIGTTIN && con.curr_input_mode != tty::cygwin)
     {
-      set_input_mode (tty::cygwin, &tc ()->ti, get_handle_set ());
       set_disable_master_thread (false, this);
+      set_input_mode (tty::cygwin, &tc ()->ti, get_handle_set ());
     }
   if (sig == SIGTTOU && con.curr_output_mode != tty::cygwin)
     set_output_mode (tty::cygwin, &tc ()->ti, get_handle_set ());
@@ -1987,8 +1987,8 @@ fhandler_console::post_open_setup (int fd)
   /* Setting-up console mode for cygwin app started from non-cygwin app. */
   if (fd == 0)
     {
-      set_input_mode (tty::cygwin, &get_ttyp ()->ti, &handle_set);
       set_disable_master_thread (false, this);
+      set_input_mode (tty::cygwin, &get_ttyp ()->ti, &handle_set);
     }
   else if (fd == 1 || fd == 2)
     set_output_mode (tty::cygwin, &get_ttyp ()->ti, &handle_set);
@@ -2995,7 +2995,12 @@ fhandler_console::char_command (char c)
 		  if (con.args[i] == 1) /* DECCKM */
 		    con.cursor_key_app_mode = (c == 'h');
 		  if (con.args[i] == 9001) /* win32-input-mode (https://github.com/microsoft/terminal/blob/main/doc/specs/%234999%20-%20Improved%20keyboard%20handling%20in%20Conpty.md) */
-		    set_disable_master_thread (c == 'h', this);
+		    {
+		      set_disable_master_thread (c == 'h', this);
+		      if (con.curr_input_mode == tty::cygwin)
+			set_input_mode (tty::cygwin,
+					&tc ()->ti, get_handle_set ());
+		    }
 		}
 	      /* Call fix_tab_position() if screen has been alternated. */
 	      if (need_fix_tab_position)