[newlib-cygwin/cygwin-3_5-branch] Cygwin: pty: Make GNU screen and tmux work in ConEmu cygwin-connector.

[Takashi Yano]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=79db49a1846dd15b4a9b6fc5606e402252d1d50e

commit 79db49a1846dd15b4a9b6fc5606e402252d1d50e
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Wed Feb 14 23:10:04 2024 +0900

    Cygwin: pty: Make GNU screen and tmux work in ConEmu cygwin-connector.
    
    Fixes: 3721a756b0d8 ("Cygwin: console: Make the console accessible from other terminals.")
    Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>

Diff:
---
 winsup/cygwin/fhandler/pty.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/fhandler/pty.cc b/winsup/cygwin/fhandler/pty.cc
index d31d30b1f..e52590c9d 100644
--- a/winsup/cygwin/fhandler/pty.cc
+++ b/winsup/cygwin/fhandler/pty.cc
@@ -970,7 +970,7 @@ fhandler_pty_slave::open (int flags, mode_t)
   set_output_handle (to_master_local);
 
   if (_major (myself->ctty) == DEV_CONS_MAJOR
-      && !(!pinfo (myself->ppid) && getenv ("ConEmuPID")))
+      && !(!pinfo (myself->ppid) && GetModuleHandle ("ConEmuHk64.dll")))
     /* This process is supposed to be a master process which is
        running on console. Invisible console will be created in
        primary slave process to prevent overriding code page
@@ -1049,6 +1049,8 @@ fhandler_pty_slave::close ()
   fhandler_pty_common::close ();
   if (!ForceCloseHandle (output_mutex))
     termios_printf ("CloseHandle (output_mutex<%p>), %E", output_mutex);
+  if (!get_ttyp ()->invisible_console_pid && myself->ctty == CTTY_RELEASED)
+    FreeConsole();
   if (get_ttyp ()->invisible_console_pid
       && !pinfo (get_ttyp ()->invisible_console_pid))
     get_ttyp ()->invisible_console_pid = 0;