+ @type parent: str
+ @param parent: If non-null it will be the directory the directory is pre-created in.
+
+ @type prefix: str
+ @param prefix: The filename will be prefixed with this string
+
+ @type suffix: str
+ @param suffix: The filename will end with this string
+
+ @type mode: str
+ @param mode: If set the file will get chmodded to those permissions
+
+ @type group: str
+ @param group: If set the file will get chgrped to the specified group.
+
+ @rtype: list
+ @return: Returns a pair (fd, name)
+