LP was written to prepare one or more files for the output on a
printer. It should be used from within the command line of a
CLI/Shell and offers a large variety of options.
You can save your favorite settings in ENV:LPOPTS. Options given in the
command line (or in a WITH file) override them.
Before printing anything LP builds up a directed graph and checks it.
This is because WITH files may contain further WITH files and LP is smart
enough to prevent you from producing neverending output as a result
of a cyclic graph. ;-)
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