of paths relative to the bin directory.
This allows a user to setup a directory tree for some software with
-directories E<lt>rootE<gt>/bin and E<lt>rootE<gt>/lib and then the above example will allow
-the use of modules in the lib directory without knowing where the software
-tree is installed.
+directories C<< <root>/bin >> and C<< <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 B<-e> option or the perl script is read from
C<STDIN> then FindBin sets both C<$Bin> and C<$RealBin> to the current
$RealBin - $Bin with all links resolved
$RealScript - $Script with all links resolved
+=head1 KNOWN ISSUES
+
+If there are two modules using C<FindBin> from different directories
+under the same interpreter, this won't work. Since C<FindBin> uses a
+C<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 C<FindBin> in modules that you plan to put
+on CPAN. To make sure that C<FindBin> will work is to call the C<again>
+function:
+
+ use FindBin;
+ FindBin::again(); # or FindBin->again;
+
+In former versions of FindBin there was no C<again> function. The
+workaround was to force the C<BEGIN> block to be executed again:
+
+ delete $INC{'FindBin.pm'};
+ require FindBin;
+
=head1 KNOWN BUGS
-if perl is invoked as
+If perl is invoked as
perl filename
-and I<filename> does not have executable rights and a program called I<filename>
-exists in the users C<$ENV{PATH}> which satisfies both B<-x> and B<-T> then FindBin
-assumes that it was invoked via the C<$ENV{PATH}>.
+and I<filename> does not have executable rights and a program called
+I<filename> exists in the users C<$ENV{PATH}> which satisfies both B<-x>
+and B<-T> then FindBin assumes that it was invoked via the
+C<$ENV{PATH}>.
Workaround is to invoke perl as
=head1 AUTHORS
FindBin is supported as part of the core perl distribution. Please send bug
-reports to E<lt>F<perlbug@perl.org>E<gt> using the perlbug program included with perl.
+reports to E<lt>F<perlbug@perl.org>E<gt> using the perlbug program
+included with perl.
Graham Barr E<lt>F<gbarr@pobox.com>E<gt>
Nick Ing-Simmons E<lt>F<nik@tiuk.ti.com>E<gt>
use Carp;
require 5.000;
require Exporter;
-use Cwd qw(getcwd abs_path);
+use Cwd qw(getcwd cwd abs_path);
use Config;
use File::Basename;
use File::Spec;
%EXPORT_TAGS = (ALL => [qw($Bin $Script $RealBin $RealScript $Dir $RealDir)]);
@ISA = qw(Exporter);
-$VERSION = "1.42";
+$VERSION = "1.49";
-BEGIN
+
+# needed for VMS-specific filename translation
+if( $^O eq 'VMS' ) {
+ require VMS::Filespec;
+ VMS::Filespec->import;
+}
+
+sub cwd2 {
+ my $cwd = getcwd();
+ # getcwd might fail if it hasn't access to the current directory.
+ # try harder.
+ defined $cwd or $cwd = cwd();
+ $cwd;
+}
+
+sub init
{
*Dir = \$Bin;
*RealDir = \$RealBin;
if($0 eq '-e' || $0 eq '-')
{
# perl invoked with -e or script is on C<STDIN>
-
$Script = $RealScript = $0;
- $Bin = $RealBin = getcwd();
+ $Bin = $RealBin = cwd2();
+ $Bin = VMS::Filespec::unixify($Bin) if $^O eq 'VMS';
}
else
{
if ($^O eq 'VMS')
{
- ($Bin,$Script) = VMS::Filespec::rmsexpand($0) =~ /(.*\])(.*)/;
+ ($Bin,$Script) = VMS::Filespec::rmsexpand($0) =~ /(.*[\]>\/]+)(.*)/s;
+ # C<use disk:[dev]/lib> isn't going to work, so unixify first
+ ($Bin = VMS::Filespec::unixify($Bin)) =~ s/\/\z//;
($RealBin,$RealScript) = ($Bin,$Script);
}
else
{
- my $IsWin32 = $^O eq 'MSWin32';
- unless(($script =~ m#/# || ($IsWin32 && $script =~ m#\\#))
+ my $dosish = ($^O eq 'MSWin32' or $^O eq 'os2');
+ unless(($script =~ m#/# || ($dosish && $script =~ m#\\#))
&& -f $script)
{
my $dir;
foreach $dir (File::Spec->path)
- {
+ {
my $scr = File::Spec->catfile($dir, $script);
- if(-r $scr && (!$IsWin32 || -x _))
+
+ # $script can been found via PATH but perl could have
+ # been invoked as 'perl file'. Do a dumb check to see
+ # if $script is a perl program, if not then keep $script = $0
+ #
+ # well we actually only check that it is an ASCII file
+ # we know its executable so it is probably a script
+ # of some sort.
+ if(-f $scr && -r _ && ($dosish || -x _) && -s _ && -T _)
{
$script = $scr;
-
- if (-f $0)
- {
- # $script has been found via PATH but perl could have
- # been invoked as 'perl file'. Do a dumb check to see
- # if $script is a perl program, if not then $script = $0
- #
- # well we actually only check that it is an ASCII file
- # we know its executable so it is probably a script
- # of some sort.
-
- $script = $0 unless(-T $script);
- }
last;
}
}
croak("Cannot find current script '$0'") unless(-f $script);
- # Ensure $script contains the complete path incase we C<chdir>
+ # Ensure $script contains the complete path in case we C<chdir>
- $script = File::Spec->catfile(getcwd(), $script)
+ $script = File::Spec->catfile(cwd2(), $script)
unless File::Spec->file_name_is_absolute($script);
($Script,$Bin) = fileparse($script);
}
# Get absolute paths to directories
- $Bin = abs_path($Bin) if($Bin);
+ if ($Bin) {
+ my $BinOld = $Bin;
+ $Bin = abs_path($Bin);
+ defined $Bin or $Bin = File::Spec->canonpath($BinOld);
+ }
$RealBin = abs_path($RealBin) if($RealBin);
}
}
}
-1; # Keep require happy
+BEGIN { init }
+*again = \&init;
+
+1; # Keep require happy
https://perl5.git.perl.org / perl5.git / blobdiff