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FindBin(3perl)         Perl Programmers Reference Guide         FindBin(3perl)

       FindBin - Locate directory of original perl script

        use FindBin;
        use lib "$FindBin::Bin/../lib";


        use FindBin qw($Bin);
        use lib "$Bin/../lib";

       Locates the full path to the script bin directory to allow the use of
       paths relative to the bin directory.

       This allows a user to setup a directory tree for some software with
       directories "<root>/bin" and "<root>/lib", and then the above example
       will allow the use of modules in the lib directory without knowing
       where the software tree is installed.

       If perl is invoked using the -e option or the perl script is read from
       "STDIN" then FindBin sets both $Bin and $RealBin to the current

        $Bin         - path to bin directory from where script was invoked
        $Script      - basename of script from which perl was invoked
        $RealBin     - $Bin with all links resolved
        $RealScript  - $Script with all links resolved

       If there are two modules using "FindBin" from different directories
       under the same interpreter, this won't work. Since "FindBin" uses a
       "BEGIN" block, it'll be executed only once, and only the first caller
       will get it right. This is a problem under mod_perl and other
       persistent Perl environments, where you shouldn't use this module.
       Which also means that you should avoid using "FindBin" in modules that
       you plan to put on CPAN. To make sure that "FindBin" will work is to
       call the "again" function:

         use FindBin;
         FindBin::again(); # or FindBin->again;

       In former versions of FindBin there was no "again" function. The
       workaround was to force the "BEGIN" block to be executed again:

         delete $INC{''};
         require FindBin;

       FindBin is supported as part of the core perl distribution. Please send
       bug reports to <> using the perlbug program included
       with perl.

       Graham Barr <> Nick Ing-Simmons <>

       Copyright (c) 1995 Graham Barr & Nick Ing-Simmons. All rights reserved.
       This program is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

perl v5.20.2                      2014-12-27                    FindBin(3perl)

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