[newlib-cygwin/cygwin-3_3-branch] Cygwin: console: Add workaround for ConEmu cygwin connector.

[newlib-cygwin/cygwin-3_3-branch] Cygwin: console: Add workaround for ConEmu cygwin connector.

[Takashi Yano]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=28d69dc863a60dc8b997d7f8e025d46d4b57e097

commit 28d69dc863a60dc8b997d7f8e025d46d4b57e097
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Thu Jul 28 21:58:04 2022 +0900

    Cygwin: console: Add workaround for ConEmu cygwin connector.
    
    - ConEmu cygwin connector conflicts with cons_master_thread since
      it does not use read() to read console input. With this patch,
      cons_master_thread is disabled in ConEmu cygwin connector.

Diff:
---
 winsup/cygwin/fhandler_console.cc | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/winsup/cygwin/fhandler_console.cc b/winsup/cygwin/fhandler_console.cc
index e90b8d5ee..c7dc8c609 100644
--- a/winsup/cygwin/fhandler_console.cc
+++ b/winsup/cygwin/fhandler_console.cc
@@ -1602,6 +1602,8 @@ fhandler_console::dup (fhandler_base *child, int flags)
   return 0;
 }
 
+static void hook_conemu_cygwin_connector();
+
 int
 fhandler_console::open (int flags, mode_t)
 {
@@ -1689,6 +1691,12 @@ fhandler_console::open (int flags, mode_t)
 
   if (myself->pid == con.owner)
     {
+#ifdef __x86_64__
+      if (GetModuleHandle ("ConEmuHk64.dll"))
+#else
+      if (GetModuleHandle ("ConEmuHk.dll"))
+#endif
+	hook_conemu_cygwin_connector ();
       char name[MAX_PATH];
       shared_name (name, CONS_THREAD_SYNC, get_minor ());
       thread_sync_event = CreateEvent(NULL, FALSE, FALSE, name);
@@ -3980,6 +3988,7 @@ fhandler_console::set_console_mode_to_native ()
 DEF_HOOK (CreateProcessA);
 DEF_HOOK (CreateProcessW);
 DEF_HOOK (ContinueDebugEvent);
+DEF_HOOK (LoadLibraryA); /* Hooked for ConEmu cygwin connector */
 
 static BOOL WINAPI
 CreateProcessA_Hooked
@@ -4021,6 +4030,24 @@ ContinueDebugEvent_Hooked
   return ContinueDebugEvent_Orig (p, t, s);
 }
 
+/* Hooked for ConEmu cygwin connector */
+static HMODULE WINAPI
+LoadLibraryA_Hooked (LPCSTR m)
+{
+  const char *p;
+  if ((p = strrchr(m, '\\')))
+    p++;
+  else
+    p = m;
+#ifdef __x86_64__
+  if (strcasecmp(p, "ConEmuHk64.dll") == 0)
+#else
+  if (strcasecmp(p, "ConEmuHk.dll") == 0)
+#endif
+    fhandler_console::set_disable_master_thread (true);
+  return LoadLibraryA_Orig (m);
+}
+
 void
 fhandler_console::fixup_after_fork_exec (bool execing)
 {
@@ -4044,6 +4071,12 @@ fhandler_console::fixup_after_fork_exec (bool execing)
   DO_HOOK (NULL, ContinueDebugEvent);
 }
 
+static void
+hook_conemu_cygwin_connector()
+{
+  DO_HOOK (NULL, LoadLibraryA);
+}
+
 // #define WINSTA_ACCESS (WINSTA_READATTRIBUTES | STANDARD_RIGHTS_READ | STANDARD_RIGHTS_WRITE | WINSTA_CREATEDESKTOP | WINSTA_EXITWINDOWS)
 #define WINSTA_ACCESS WINSTA_ALL_ACCESS