Added wxFile::write_excl and use it from wxTempFile to securely open the

temporary file.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12801 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/file.h

@@ -58,7 +58,7 @@ public:
   // more file constants
   // -------------------
     // opening mode
-  enum OpenMode { read, write, read_write, write_append };
+  enum OpenMode { read, write, read_write, write_append, write_excl };
     // standard values for file descriptor
   enum { fd_invalid = -1, fd_stdin, fd_stdout, fd_stderr };