text: POSIX - Perl interface to IEEE Std 1003.1
  use: thats a filedescriptor, *NOT* a filehandle
  The POSIX module permits you to access all (or nearly all) the standard POSIX 1003.1 identifiers. Many of these identifiers have been given Perl-ish interfaces. systems manpages for general information on most features. Consult perlfunc for functions which are noted as being identical to Perls.
  The POSIX module is probably the most complex Perl module supplied with the standard distribution. It incorporates autoloading, namespace games, and dynamic loading of code thats in Perl, C, or both. Its a great source of wisdom.
  A few functions are not implemented because they are C specific. If you attempt to call these, they will print a message telling you that they arent implemented, and suggest using the Perl equivalent should one exist. For example, trying to access the setjmp() call will elicit the message setjmp() is C-specific: use eval {} instead. theres no usable ICANON macro after all. This could be construed to be a bug.