server: Introduce IOCTL_CONDRV_GET_INPUT_INFO ioctl.

include/wine/condrv.h

+/*
+ * Console driver ioctls
+ *
+ * Copyright 2020 Jacek Caban for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef _INC_CONDRV
+#define _INC_CONDRV
+
+#include "winioctl.h"
+
+/* console input ioctls */
+#define IOCTL_CONDRV_GET_INPUT_INFO        CTL_CODE(FILE_DEVICE_CONSOLE, 13, METHOD_BUFFERED, FILE_READ_PROPERTIES)
+
+/* IOCTL_CONDRV_GET_INPUT_INFO result */
+struct condrv_input_info
+{
+    unsigned int  input_count;    /* number of available input records */
+};
+
+#endif /* _INC_CONDRV */

server/console.c

@@ -38,6 +38,7 @@
 #include "unicode.h"
 #include "wincon.h"
 #include "winternl.h"
+#include "wine/condrv.h"
 
 struct screen_buffer;
 struct console_input_events;
@@ -200,6 +201,7 @@ static const struct object_ops screen_buffer_ops =
 };
 
 static enum server_fd_type console_get_fd_type( struct fd *fd );
+static int console_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
 
 static const struct fd_ops console_fd_ops =
 {
@@ -211,7 +213,7 @@ static const struct fd_ops console_fd_ops =
     no_fd_flush,                  /* flush */
     no_fd_get_file_info,          /* get_file_info */
     no_fd_get_volume_info,        /* get_volume_info */
-    default_fd_ioctl,             /* ioctl */
+    console_ioctl,                /* ioctl */
     default_fd_queue_async,       /* queue_async */
     default_fd_reselect_async     /* reselect_async */
 };
@@ -1487,6 +1489,30 @@ static void scroll_console_output( struct screen_buffer *screen_buffer, int xsrc
     console_input_events_append( screen_buffer->input, &evt );
 }
 
+static int console_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
+{
+    struct console_input *console = get_fd_user( fd );
+
+    switch (code)
+    {
+    case IOCTL_CONDRV_GET_INPUT_INFO:
+        {
+            struct condrv_input_info info;
+            if (get_reply_max_size() != sizeof(info))
+            {
+                set_error( STATUS_INVALID_PARAMETER );
+                return 0;
+            }
+            info.input_count = console->recnum;
+            return set_reply_data( &info, sizeof(info) ) != NULL;
+        }
+
+    default:
+        set_error( STATUS_INVALID_HANDLE );
+        return 0;
+    }
+}
+
 static struct object_type *console_device_get_type( struct object *obj )
 {
     static const WCHAR name[] = {'D','e','v','i','c','e'};