libio-tee-perl 0.65-1 (s390x binary) in ubuntu disco

 IO::Tee objects can be used to multiplex input and output in two
 different ways. The first way is to multiplex output to zero or more
 output handles. The IO::Tee constructor, given a list of output
 handles, returns a tied handle that can be written to. When written
 to (using print or printf), the IO::Tee object multiplexes the
 output to the list of handles originally passed to the constructor.
 As a shortcut, you can also directly pass a string or an array
 reference to the constructor, in which case IO::File::new is called
 for you with the specified argument or arguments.
 .
 The second way is to multiplex input from one input handle to zero or
 more output handles as it is being read. The IO::Tee constructor,
 given an input handle followed by a list of output handles, returns a
 tied handle that can be read from as well as written to. When written
 to, the IO::Tee object multiplexes the output to all handles passed
 to the constructor, as described in the previous paragraph. When read
 from, the IO::Tee object reads from the input handle given as the
 first argument to the IO::Tee constructor, then writes any data
 read to the output handles given as the remaining arguments to the
 constructor.