The following operands shall be supported:
source_file
A pathname of a file to be copied. If a source_file
operand is '-', it shall refer to a file named -;
implementations shall not treat it as meaning standard
input.
target_file
A pathname of an existing or nonexistent file, used for
the output when a single file is copied. If a
target_file operand is '-', it shall refer to a file
named -; implementations shall not treat it as meaning
standard output.
target A pathname of a directory to contain the copied files.
