#define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR)
#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
-#define S_ISDIR(mode) (((mode) & _S_IFDIR) == _S_IFDIR ? 1 : 0)
+#define S_ISDIR(mode) (((mode) & (_S_IFDIR)) == (_S_IFDIR) ? 1 : 0)
// This isn't defined anywhere, so give a sane value.
#define MAXSYMLINKS 255