[glib] glocalfile: fix error code when opening a directory on win32

[Dan Winship <danw src gnome org>]

commit ca5ed93fde448943d7ab62b057a9b16e6ed85621
Author: Dan Winship <danw gnome org>
Date:   Fri Feb 3 11:45:51 2012 -0500

    glocalfile: fix error code when opening a directory on win32
    
    g_file_read() was returning G_IO_ERROR_IS_DIRECTORY when you tried to
    open a directory on unix, but G_IO_ERROR_PERMISSION_DENIED on win32.
    Fix that, and add a test to tests/file.c
    
    Pointed out on IRC by PaweÅ Forysiuk.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=669330

 gio/glocalfile.c |   14 ++++++++++++++
 gio/tests/file.c |    5 +++++
 2 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/gio/glocalfile.c b/gio/glocalfile.c
index cfd805a..176817d 100644
--- a/gio/glocalfile.c
+++ b/gio/glocalfile.c
@@ -1314,6 +1314,20 @@ g_local_file_read (GFile         *file,
     {
       int errsv = errno;
 
+#ifdef G_OS_WIN32
+      if (errsv == EACCES)
+	{
+	  ret = _stati64 (local->filename, &buf);
+	  if (ret == 0 && S_ISDIR (buf.st_mode))
+	    {
+	      g_set_error_literal (error, G_IO_ERROR,
+				   G_IO_ERROR_IS_DIRECTORY,
+				   _("Can't open directory"));
+	      return NULL;
+	    }
+	}
+#endif
+
       g_set_error (error, G_IO_ERROR,
 		   g_io_error_from_errno (errsv),
 		   _("Error opening file: %s"),
diff --git a/gio/tests/file.c b/gio/tests/file.c
index 35bb2cd..c7f840b 100644
--- a/gio/tests/file.c
+++ b/gio/tests/file.c
@@ -78,6 +78,7 @@ test_type (void)
 {
   GFile *file;
   GFileType type;
+  GError *error = NULL;
 
   file = g_file_new_for_path (SRCDIR "/file.c");
   type = g_file_query_file_type (file, 0, NULL);
@@ -87,6 +88,10 @@ test_type (void)
   file = g_file_new_for_path (SRCDIR "/schema-tests");
   type = g_file_query_file_type (file, 0, NULL);
   g_assert_cmpint (type, ==, G_FILE_TYPE_DIRECTORY);
+
+  g_file_read (file, NULL, &error);
+  g_assert_error (error, G_IO_ERROR, G_IO_ERROR_IS_DIRECTORY);
+  g_error_free (error);
   g_object_unref (file);
 }