[newlib-cygwin/cygwin-3_6-branch] Cygwin: console: Set ENABLE_PROCESSED_INPUT when disable_master_thread

[Takashi Yano]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=61cc419b2b385239b95e13ef699e0cd02da6df47

commit 61cc419b2b385239b95e13ef699e0cd02da6df47
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Tue Jul 1 17:10:34 2025 +0900

    Cygwin: console: Set ENABLE_PROCESSED_INPUT when disable_master_thread
    
    Currently, ENABLE_PROCESSED_INPUT is set in set_input_mode() if
    master_thread_suspended is true. This enables Ctrl-C handling when
    cons_master_thread is suspended, since Ctrl-C is normally handled
    by cons_master_thread.
    However, when disable_master_thread is true, ENABLE_PROCESSED_INPUT
    is not set, even though this also disables Ctrl-C handling in
    cons_master_thread. Due to this bug, the command
      C:\cygwin64\bin\sleep 10 < NUL
    in the Command Prompt cannot be terminated with Ctrl-C.
    
    This patch addresses the issue by setting ENABLE_PROCESSED_INPUT
    when either disable_master_thread or master_thread_suspended is true.
    
    This bug also affects cases where non-Cygwin Git (Git for Windows)
    launches Cygwin SSH. In such cases, SSH also cannot be terminated
    with Ctrl-C.
    
    Addresses: https://github.com/git-for-windows/git/issues/5682#issuecomment-2995983695
    Fixes: 746c8116dd4f ("Cygwin: console: Allow pasting very long text input.")
    Reported-by: Johannes Schindelin <johannes.schindelin@gmx.de>
    Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>
    (cherry picked from commit 476135a24506dd624eb46b50fd634fcd740008ba)

Diff:
---
 winsup/cygwin/fhandler/console.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/winsup/cygwin/fhandler/console.cc b/winsup/cygwin/fhandler/console.cc
index 08ac045d0..48c932647 100644
--- a/winsup/cygwin/fhandler/console.cc
+++ b/winsup/cygwin/fhandler/console.cc
@@ -831,7 +831,7 @@ fhandler_console::set_input_mode (tty::cons_mode m, const termios *t,
       break;
     case tty::cygwin:
       flags |= ENABLE_WINDOW_INPUT;
-      if (con.master_thread_suspended)
+      if (con.master_thread_suspended || con.disable_master_thread)
 	flags |= ENABLE_PROCESSED_INPUT;
       if (wincap.has_con_24bit_colors () && !con_is_legacy)
 	flags |= ENABLE_VIRTUAL_TERMINAL_INPUT;