L_OK = 0
This factory instantiates a device module and makes it available in its member $device.
createTemporaryDirectory( purpose = installer, failIsFatal = 1) : mixed|string|int
create a temporary directory and return the location
one of 'installer', 'logo', 'test' defined the purpose of the directory
decides if a creation failure should cause an error; defaults to true
the tuple of: base path, absolute path for directory, directory name