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.\" ========================================================================
.TH FindBin 3 "2001-09-21" "perl v5.8.8" "Perl Programmers Reference Guide"
FindBin \- Locate directory of original perl script
\& use lib "$FindBin::Bin/../lib";
\& use lib "$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 \f(CW\*(C`<root>/bin\*(C'\fR and \f(CW\*(C`<root>/lib\*(C'\fR, 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 \fB\-e\fR option or the perl script is read from
\&\f(CW\*(C`STDIN\*(C'\fR then FindBin sets both \f(CW$Bin\fR and \f(CW$RealBin\fR to the current
.SH "EXPORTABLE VARIABLES"
.IX Header "EXPORTABLE VARIABLES"
\& $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
.IX Header "KNOWN ISSUES"
If there are two modules using \f(CW\*(C`FindBin\*(C'\fR from different directories
under the same interpreter, this won't work. Since \f(CW\*(C`FindBin\*(C'\fR uses a
\&\f(CW\*(C`BEGIN\*(C'\fR 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 \f(CW\*(C`FindBin\*(C'\fR in modules that you plan to put
on \s-1CPAN\s0. To make sure that \f(CW\*(C`FindBin\*(C'\fR will work is to call the \f(CW\*(C`again\*(C'\fR
\& FindBin::again(); # or FindBin->again;
In former versions of FindBin there was no \f(CW\*(C`again\*(C'\fR function. The
workaround was to force the \f(CW\*(C`BEGIN\*(C'\fR block to be executed again:
\& delete $INC{'FindBin.pm'};
and \fIfilename\fR does not have executable rights and a program called
\&\fIfilename\fR exists in the users \f(CW$ENV{PATH}\fR which satisfies both \fB\-x\fR
and \fB\-T\fR then FindBin assumes that it was invoked via the
Workaround is to invoke perl as
FindBin is supported as part of the core perl distribution. Please send bug
reports to <\fIperlbug@perl.org\fR> using the perlbug program
Graham Barr <\fIgbarr@pobox.com\fR>
Nick Ing-Simmons <\fInik@tiuk.ti.com\fR>
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.
projects / OpenSPARC-T2-SAM / blob