[PATCH 1/2] Cygwin: console: Fix SIGWINCH handling in Win7.

[Takashi Yano via Cygwin-patches]

- If ENABLE_VIRTUAL_TERMINAL_INPUT is not set, changing window height
  does not generate WINDOW_BUFFER_SIZE_EVENT. This happens if console
  is in the legacy mode. Therefore, with this patch, the windows size
  is checked every time in cons_master_thread() if the cosole is in
  the legacy mode.
---
 winsup/cygwin/fhandler_console.cc | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/winsup/cygwin/fhandler_console.cc 
b/winsup/cygwin/fhandler_console.cc
index 5053cb053..4dee506dd 100644
--- a/winsup/cygwin/fhandler_console.cc
+++ b/winsup/cygwin/fhandler_console.cc
@@ -223,6 +223,21 @@ fhandler_console::cons_master_thread (handle_set_t *p, tty 
*ttyp)
          ReleaseMutex (p->input_mutex);
          return;
        }
+      /* If ENABLE_VIRTUAL_TERMINAL_INPUT is not set, changing
+        window height does not generate WINDOW_BUFFER_SIZE_EVENT.
+        Therefore, check windows size every time here. */
+      if (!wincap.has_con_24bit_colors () || con_is_legacy)
+       {
+         SHORT y = con.dwWinSize.Y;
+         SHORT x = con.dwWinSize.X;
+         con.fillin (p->output_handle);
+         if (y != con.dwWinSize.Y || x != con.dwWinSize.X)
+           {
+             con.scroll_region.Top = 0;
+             con.scroll_region.Bottom = -1;
+             ttyp->kill_pgrp (SIGWINCH);
+           }
+       }
       for (i = 0; i < total_read; i++)
        {
          const char c = input_rec[i].Event.KeyEvent.uChar.AsciiChar;
-- 
2.30.0