Extracts the files in
the library. The contents of the library are not changed. If no
file operands are given, all files in the library are extracted.
If the filename of a file extracted from the library is longer than
that supported in the destination directory, the results are undefined.
Be aware that if the name of a file in the library is longer
than the file system can support, an error is displayed and the
file is not extracted. To extract files with long filenames, use
-T option to truncate the names of files that
are too long.