X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/9426adcd48655815b65cea5a9f1eebbe7e23a9df..0c289d1353d1d6a489307ffba4ca3a6f96e97809:/lib/FindBin.pm diff --git a/lib/FindBin.pm b/lib/FindBin.pm index 9d35f6f..e218de9 100644 --- a/lib/FindBin.pm +++ b/lib/FindBin.pm @@ -24,9 +24,9 @@ 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 ErootE/bin and ErootE/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<< /bin >> and C<< /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 then FindBin sets both C<$Bin> and C<$RealBin> to the current @@ -39,15 +39,36 @@ directory. $RealBin - $Bin with all links resolved $RealScript - $Script with all links resolved +=head1 KNOWN ISSUES + +If there are two modules using C from different directories +under the same interpreter, this won't work. Since C uses a +C 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 in modules that you plan to put +on CPAN. To make sure that C will work is to call the C +function: + + use FindBin; + FindBin::again(); # or FindBin->again; + +In former versions of FindBin there was no C function. The +workaround was to force the C block to be executed again: + + delete $INC{'FindBin.pm'}; + require FindBin; + =head1 KNOWN BUGS -if perl is invoked as +If perl is invoked as perl filename -and I does not have executable rights and a program called I -exists in the users C<$ENV{PATH}> which satisfies both B<-x> and B<-T> then FindBin -assumes that it was invoked via the C<$ENV{PATH}>. +and I does not have executable rights and a program called +I exists in the users C<$ENV{PATH}> which satisfies both B<-x> +and B<-T> then FindBin assumes that it was invoked via the +C<$ENV{PATH}>. Workaround is to invoke perl as @@ -56,7 +77,8 @@ Workaround is to invoke perl as =head1 AUTHORS FindBin is supported as part of the core perl distribution. Please send bug -reports to EFE using the perlbug program included with perl. +reports to EFE using the perlbug program +included with perl. Graham Barr EFE Nick Ing-Simmons EFE @@ -73,7 +95,7 @@ package FindBin; use Carp; require 5.000; require Exporter; -use Cwd qw(getcwd abs_path); +use Cwd qw(getcwd cwd abs_path); use Config; use File::Basename; use File::Spec; @@ -82,9 +104,24 @@ use File::Spec; %EXPORT_TAGS = (ALL => [qw($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; @@ -92,9 +129,9 @@ BEGIN if($0 eq '-e' || $0 eq '-') { # perl invoked with -e or script is on C - $Script = $RealScript = $0; - $Bin = $RealBin = getcwd(); + $Bin = $RealBin = cwd2(); + $Bin = VMS::Filespec::unixify($Bin) if $^O eq 'VMS'; } else { @@ -102,35 +139,32 @@ BEGIN if ($^O eq 'VMS') { - ($Bin,$Script) = VMS::Filespec::rmsexpand($0) =~ /(.*\])(.*)/; + ($Bin,$Script) = VMS::Filespec::rmsexpand($0) =~ /(.*[\]>\/]+)(.*)/s; + # C 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; } } @@ -138,9 +172,9 @@ BEGIN croak("Cannot find current script '$0'") unless(-f $script); - # Ensure $script contains the complete path incase we C + # Ensure $script contains the complete path in case we C - $script = File::Spec->catfile(getcwd(), $script) + $script = File::Spec->catfile(cwd2(), $script) unless File::Spec->file_name_is_absolute($script); ($Script,$Bin) = fileparse($script); @@ -159,11 +193,18 @@ BEGIN } # 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