[newlib-cygwin] Cygwin: console: Fix a problem that minor ID is incorrect in ConEmu.

[Takashi Yano <tyan0@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=8aad3a7edeb27b163db551403eecc94c959c857a

commit 8aad3a7edeb27b163db551403eecc94c959c857a
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Tue Feb 13 11:45:36 2024 +0900

    Cygwin: console: Fix a problem that minor ID is incorrect in ConEmu.
    
    Previously, minor device number of console was not assigned correctly
    in ConEmu environment. This is because console window of ConEmu is
    not enumerated by EnumWindows(). This patch fixes the issue.
    
    Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>

Diff:
---
 winsup/cygwin/autoload.cc         |  2 ++
 winsup/cygwin/devices.cc          |  7 +++++++
 winsup/cygwin/devices.in          |  7 +++++++
 winsup/cygwin/fhandler/console.cc | 14 ++++++++++++++
 4 files changed, 30 insertions(+)

diff --git a/winsup/cygwin/autoload.cc b/winsup/cygwin/autoload.cc
index 7e610bdd0..65e906e8b 100644
--- a/winsup/cygwin/autoload.cc
+++ b/winsup/cygwin/autoload.cc
@@ -548,7 +548,9 @@ LoadDLLfunc (DefWindowProcW, user32)
 LoadDLLfunc (DestroyWindow, user32)
 LoadDLLfunc (DispatchMessageW, user32)
 LoadDLLfunc (EmptyClipboard, user32)
+LoadDLLfunc (EnumChildWindows, user32)
 LoadDLLfunc (EnumWindows, user32)
+LoadDLLfunc (GetClassNameA, user32)
 LoadDLLfunc (GetClipboardData, user32)
 LoadDLLfunc (GetDC, user32)
 LoadDLLfunc (GetForegroundWindow, user32)
diff --git a/winsup/cygwin/devices.cc b/winsup/cygwin/devices.cc
index 167b0e4b4..ca1fdf3be 100644
--- a/winsup/cygwin/devices.cc
+++ b/winsup/cygwin/devices.cc
@@ -81,6 +81,13 @@ enum_cons_dev (HWND hw, LPARAM lp)
       UnmapViewOfFile ((void *) cs);
       CloseHandle (h);
     }
+  else
+    { /* Only for ConEmu */
+      char class_hw[32];
+      if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
+	  && 0 == strcmp (class_hw, "VirtualConsoleClass"))
+	EnumChildWindows (hw, enum_cons_dev, lp);
+    }
   return TRUE;
 }
 
diff --git a/winsup/cygwin/devices.in b/winsup/cygwin/devices.in
index 48d3843fe..842f09c18 100644
--- a/winsup/cygwin/devices.in
+++ b/winsup/cygwin/devices.in
@@ -77,6 +77,13 @@ enum_cons_dev (HWND hw, LPARAM lp)
       UnmapViewOfFile ((void *) cs);
       CloseHandle (h);
     }
+  else
+    { /* Only for ConEmu */
+      char class_hw[32];
+      if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
+	  && 0 == strcmp (class_hw, "VirtualConsoleClass"))
+	EnumChildWindows (hw, enum_cons_dev, lp);
+    }
   return TRUE;
 }
 
diff --git a/winsup/cygwin/fhandler/console.cc b/winsup/cygwin/fhandler/console.cc
index b0907eb31..70824e694 100644
--- a/winsup/cygwin/fhandler/console.cc
+++ b/winsup/cygwin/fhandler/console.cc
@@ -250,6 +250,13 @@ enum_windows (HWND hw, LPARAM lp)
       UnmapViewOfFile ((void *) cs);
       CloseHandle (h);
     }
+  else
+    { /* Only for ConEmu */
+      char class_hw[32];
+      if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
+	  && 0 == strcmp (class_hw, "VirtualConsoleClass"))
+	EnumChildWindows (hw, enum_windows, lp);
+    }
   return TRUE;
 }
 
@@ -656,6 +663,13 @@ scan_console (HWND hw, LPARAM lp)
       UnmapViewOfFile ((void *) cs);
       CloseHandle (h);
     }
+  else
+    { /* Only for ConEmu */
+      char class_hw[32];
+      if (19 == GetClassName (hw, class_hw, sizeof (class_hw))
+	  && 0 == strcmp (class_hw, "VirtualConsoleClass"))
+	EnumChildWindows (hw, scan_console, lp);
+    }
   return TRUE;
 }