* fileio.c (barf_or_query_if_file_exists): Use S_ISDIR.

This is more efficient than Ffile_directory_p and avoids a minor race.

src/ChangeLog

+2011-07-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* fileio.c (barf_or_query_if_file_exists): Use S_ISDIR.
+	This is more efficient than Ffile_directory_p and avoids a minor race.
+
 2011-07-04  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
 	* buffer.c (Foverlay_put): Say what the return value is

src/fileio.c

@@ -1755,7 +1755,7 @@ barf_or_query_if_file_exists (Lisp_Object absname, const char *querystring,
      regardless of what access permissions it has.  */
   if (lstat (SSDATA (encoded_filename), &statbuf) >= 0)
     {
-      if (Ffile_directory_p (absname))
+      if (S_ISDIR (statbuf.st_mode))
 	xsignal2 (Qfile_error,
 		  build_string ("File is a directory"), absname);