Env(3)                 Perl Programmers Reference Guide                 Env(3)

       Env - perl module that imports environment variables

           use Env;
           use Env qw(PATH HOME TERM);

       Perl maintains environment variables in a pseudo-hash named %ENV.  For
       when this access method is inconvenient, the Perl module Env allows
       environment variables to be treated as simple variables.

       The Env::import() function ties environment variables with suitable
       names to global Perl variables with the same names.  By default it does
       so with all existing environment variables (keys %ENV).  If the import
       function receives arguments, it takes them to be a list of environment
       variables to tie; it's okay if they don't yet exist.

       After an environment variable is tied, merely use it like a normal
       variable.  You may access its value

           @path = split(/:/, $PATH);

       or modify it

           $PATH .= ":.";

       however you'd like.  To remove a tied environment variable from the
       environment, assign it the undefined value

           undef $PATH;

       Chip Salzenberg <chip@fin.uucp>

3rd Berkeley Distribution    perl 5.005, patch 02                       Env(3)