$cgi->script_name() or $ENV{SCRIPT_NAME} for the url of the script relative to the root url of the server.

Until you do a chdir, rel2abs($0) gives the absolute file system path to the script.

My server provides the document root in $ENV{DOCUMENT_ROOT}.

Combined with File::Spec and CGI, you have all you need.

Update: Example: 

use File::Basename        qw( dirname );
use File::Spec::Functions qw( rel2abs );

my $script_path = rel2abs($0);
my $script_dir  = dirname($script_path);
my $script_url  = $ENV{SCRIPT_NAME};
my $doc_root    = $ENV{DOCUMENT_ROOT};

my $redirect_to = URI->new_abs('bar.cgi', $script_url); # /dir/bar.cgi

[download]

I can't come up with any reason to use $script_path or $doc_root.

In reply to Re: IIS6 + Perl CGI: finding locations on disk by ikegami
in thread IIS6 + Perl CGI: finding locations on disk by rgcosma

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