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root |
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package File::Spec::VMS; |
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use strict; |
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use vars qw(@ISA $VERSION); |
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require File::Spec::Unix; |
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$VERSION = '1.4'; |
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@ISA = qw(File::Spec::Unix); |
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use File::Basename; |
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use VMS::Filespec; |
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=head1 NAME |
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File::Spec::VMS - methods for VMS file specs |
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=head1 SYNOPSIS |
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require File::Spec::VMS; # Done internally by File::Spec if needed |
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=head1 DESCRIPTION |
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See File::Spec::Unix for a documentation of the methods provided |
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there. This package overrides the implementation of these methods, not |
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the semantics. |
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=over 4 |
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=item eliminate_macros |
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Expands MM[KS]/Make macros in a text string, using the contents of |
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identically named elements of C<%$self>, and returns the result |
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as a file specification in Unix syntax. |
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=cut |
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sub eliminate_macros { |
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my($self,$path) = @_; |
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return '' unless $path; |
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$self = {} unless ref $self; |
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if ($path =~ /\s/) { |
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return join ' ', map { $self->eliminate_macros($_) } split /\s+/, $path; |
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} |
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my($npath) = unixify($path); |
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my($complex) = 0; |
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my($head,$macro,$tail); |
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# perform m##g in scalar context so it acts as an iterator |
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while ($npath =~ m#(.*?)\$\((\S+?)\)(.*)#gs) { |
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if ($self->{$2}) { |
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($head,$macro,$tail) = ($1,$2,$3); |
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if (ref $self->{$macro}) { |
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if (ref $self->{$macro} eq 'ARRAY') { |
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$macro = join ' ', @{$self->{$macro}}; |
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} |
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else { |
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print "Note: can't expand macro \$($macro) containing ",ref($self->{$macro}), |
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"\n\t(using MMK-specific deferred substitutuon; MMS will break)\n"; |
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$macro = "\cB$macro\cB"; |
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$complex = 1; |
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} |
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} |
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else { ($macro = unixify($self->{$macro})) =~ s#/\Z(?!\n)##; } |
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$npath = "$head$macro$tail"; |
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} |
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} |
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if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#gs; } |
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$npath; |
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} |
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=item fixpath |
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Catchall routine to clean up problem MM[SK]/Make macros. Expands macros |
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in any directory specification, in order to avoid juxtaposing two |
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VMS-syntax directories when MM[SK] is run. Also expands expressions which |
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are all macro, so that we can tell how long the expansion is, and avoid |
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overrunning DCL's command buffer when MM[KS] is running. |
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If optional second argument has a TRUE value, then the return string is |
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a VMS-syntax directory specification, if it is FALSE, the return string |
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is a VMS-syntax file specification, and if it is not specified, fixpath() |
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checks to see whether it matches the name of a directory in the current |
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default directory, and returns a directory or file specification accordingly. |
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=cut |
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sub fixpath { |
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my($self,$path,$force_path) = @_; |
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return '' unless $path; |
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$self = bless {} unless ref $self; |
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my($fixedpath,$prefix,$name); |
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if ($path =~ /\s/) { |
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return join ' ', |
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map { $self->fixpath($_,$force_path) } |
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split /\s+/, $path; |
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} |
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if ($path =~ m#^\$\([^\)]+\)\Z(?!\n)#s || $path =~ m#[/:>\]]#) { |
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if ($force_path or $path =~ /(?:DIR\)|\])\Z(?!\n)/) { |
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$fixedpath = vmspath($self->eliminate_macros($path)); |
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} |
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else { |
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$fixedpath = vmsify($self->eliminate_macros($path)); |
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} |
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} |
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elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#s)) && $self->{$prefix}) { |
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my($vmspre) = $self->eliminate_macros("\$($prefix)"); |
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# is it a dir or just a name? |
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$vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR\Z(?!\n)/) ? vmspath($vmspre) : ''; |
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$fixedpath = ($vmspre ? $vmspre : $self->{$prefix}) . $name; |
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$fixedpath = vmspath($fixedpath) if $force_path; |
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} |
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else { |
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$fixedpath = $path; |
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$fixedpath = vmspath($fixedpath) if $force_path; |
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} |
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# No hints, so we try to guess |
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if (!defined($force_path) and $fixedpath !~ /[:>(.\]]/) { |
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$fixedpath = vmspath($fixedpath) if -d $fixedpath; |
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} |
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# Trim off root dirname if it's had other dirs inserted in front of it. |
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$fixedpath =~ s/\.000000([\]>])/$1/; |
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# Special case for VMS absolute directory specs: these will have had device |
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# prepended during trip through Unix syntax in eliminate_macros(), since |
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# Unix syntax has no way to express "absolute from the top of this device's |
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# directory tree". |
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if ($path =~ /^[\[>][^.\-]/) { $fixedpath =~ s/^[^\[<]+//; } |
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$fixedpath; |
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} |
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=back |
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=head2 Methods always loaded |
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=over 4 |
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=item canonpath (override) |
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Removes redundant portions of file specifications according to VMS syntax. |
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=cut |
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sub canonpath { |
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my($self,$path) = @_; |
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if ($path =~ m|/|) { # Fake Unix |
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my $pathify = $path =~ m|/\Z(?!\n)|; |
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$path = $self->SUPER::canonpath($path); |
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if ($pathify) { return vmspath($path); } |
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else { return vmsify($path); } |
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} |
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else { |
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$path =~ tr/<>/[]/; # < and > ==> [ and ] |
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$path =~ s/\]\[\./\.\]\[/g; # ][. ==> .][ |
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$path =~ s/\[000000\.\]\[/\[/g; # [000000.][ ==> [ |
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$path =~ s/\[000000\./\[/g; # [000000. ==> [ |
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$path =~ s/\.\]\[000000\]/\]/g; # .][000000] ==> ] |
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$path =~ s/\.\]\[/\./g; # foo.][bar ==> foo.bar |
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1 while ($path =~ s/([\[\.])(-+)\.(-+)([\.\]])/$1$2$3$4/); |
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# That loop does the following |
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# with any amount of dashes: |
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# .-.-. ==> .--. |
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# [-.-. ==> [--. |
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# .-.-] ==> .--] |
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# [-.-] ==> [--] |
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1 while ($path =~ s/([\[\.])[^\]\.]+\.-(-+)([\]\.])/$1$2$3/); |
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# That loop does the following |
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# with any amount (minimum 2) |
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# of dashes: |
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# .foo.--. ==> .-. |
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# .foo.--] ==> .-] |
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# [foo.--. ==> [-. |
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# [foo.--] ==> [-] |
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# |
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# And then, the remaining cases |
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$path =~ s/\[\.-/[-/; # [.- ==> [- |
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$path =~ s/\.[^\]\.]+\.-\./\./g; # .foo.-. ==> . |
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$path =~ s/\[[^\]\.]+\.-\./\[/g; # [foo.-. ==> [ |
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$path =~ s/\.[^\]\.]+\.-\]/\]/g; # .foo.-] ==> ] |
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$path =~ s/\[[^\]\.]+\.-\]/\[000000\]/g;# [foo.-] ==> [000000] |
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$path =~ s/\[\]//; # [] ==> |
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return $path; |
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} |
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} |
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=item catdir |
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Concatenates a list of file specifications, and returns the result as a |
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VMS-syntax directory specification. No check is made for "impossible" |
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cases (e.g. elements other than the first being absolute filespecs). |
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=cut |
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sub catdir { |
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my ($self,@dirs) = @_; |
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my $dir = pop @dirs; |
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@dirs = grep($_,@dirs); |
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my $rslt; |
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if (@dirs) { |
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my $path = (@dirs == 1 ? $dirs[0] : $self->catdir(@dirs)); |
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my ($spath,$sdir) = ($path,$dir); |
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$spath =~ s/\.dir\Z(?!\n)//; $sdir =~ s/\.dir\Z(?!\n)//; |
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$sdir = $self->eliminate_macros($sdir) unless $sdir =~ /^[\w\-]+\Z(?!\n)/s; |
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$rslt = $self->fixpath($self->eliminate_macros($spath)."/$sdir",1); |
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# Special case for VMS absolute directory specs: these will have had device |
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# prepended during trip through Unix syntax in eliminate_macros(), since |
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# Unix syntax has no way to express "absolute from the top of this device's |
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# directory tree". |
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if ($spath =~ /^[\[<][^.\-]/s) { $rslt =~ s/^[^\[<]+//s; } |
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} |
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else { |
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if (not defined $dir or not length $dir) { $rslt = ''; } |
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elsif ($dir =~ /^\$\([^\)]+\)\Z(?!\n)/s) { $rslt = $dir; } |
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else { $rslt = vmspath($dir); } |
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} |
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return $self->canonpath($rslt); |
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} |
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=item catfile |
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Concatenates a list of file specifications, and returns the result as a |
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VMS-syntax file specification. |
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=cut |
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sub catfile { |
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my ($self,@files) = @_; |
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my $file = $self->canonpath(pop @files); |
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@files = grep($_,@files); |
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my $rslt; |
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if (@files) { |
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my $path = (@files == 1 ? $files[0] : $self->catdir(@files)); |
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my $spath = $path; |
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$spath =~ s/\.dir\Z(?!\n)//; |
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if ($spath =~ /^[^\)\]\/:>]+\)\Z(?!\n)/s && basename($file) eq $file) { |
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$rslt = "$spath$file"; |
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} |
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else { |
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$rslt = $self->eliminate_macros($spath); |
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$rslt = vmsify($rslt.($rslt ? '/' : '').unixify($file)); |
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} |
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} |
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else { $rslt = (defined($file) && length($file)) ? vmsify($file) : ''; } |
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return $self->canonpath($rslt); |
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} |
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=item curdir (override) |
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Returns a string representation of the current directory: '[]' |
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=cut |
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sub curdir { |
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return '[]'; |
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} |
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=item devnull (override) |
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Returns a string representation of the null device: '_NLA0:' |
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=cut |
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sub devnull { |
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return "_NLA0:"; |
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} |
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=item rootdir (override) |
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Returns a string representation of the root directory: 'SYS$DISK:[000000]' |
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=cut |
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sub rootdir { |
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return 'SYS$DISK:[000000]'; |
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} |
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=item tmpdir (override) |
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Returns a string representation of the first writable directory |
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from the following list or '' if none are writable: |
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sys$scratch: |
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$ENV{TMPDIR} |
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Since perl 5.8.0, if running under taint mode, and if $ENV{TMPDIR} |
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is tainted, it is not used. |
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=cut |
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my $tmpdir; |
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sub tmpdir { |
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return $tmpdir if defined $tmpdir; |
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my $self = shift; |
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$tmpdir = $self->_tmpdir( 'sys$scratch:', $ENV{TMPDIR} ); |
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} |
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=item updir (override) |
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Returns a string representation of the parent directory: '[-]' |
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=cut |
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sub updir { |
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return '[-]'; |
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} |
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=item case_tolerant (override) |
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VMS file specification syntax is case-tolerant. |
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=cut |
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sub case_tolerant { |
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return 1; |
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} |
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=item path (override) |
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Translate logical name DCL$PATH as a searchlist, rather than trying |
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to C<split> string value of C<$ENV{'PATH'}>. |
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=cut |
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sub path { |
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my (@dirs,$dir,$i); |
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while ($dir = $ENV{'DCL$PATH;' . $i++}) { push(@dirs,$dir); } |
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return @dirs; |
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} |
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=item file_name_is_absolute (override) |
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Checks for VMS directory spec as well as Unix separators. |
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=cut |
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sub file_name_is_absolute { |
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my ($self,$file) = @_; |
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# If it's a logical name, expand it. |
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$file = $ENV{$file} while $file =~ /^[\w\$\-]+\Z(?!\n)/s && $ENV{$file}; |
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return scalar($file =~ m!^/!s || |
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$file =~ m![<\[][^.\-\]>]! || |
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$file =~ /:[^<\[]/); |
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} |
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=item splitpath (override) |
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Splits using VMS syntax. |
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=cut |
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sub splitpath { |
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my($self,$path) = @_; |
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my($dev,$dir,$file) = ('','',''); |
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vmsify($path) =~ /(.+:)?([\[<].*[\]>])?(.*)/s; |
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return ($1 || '',$2 || '',$3); |
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} |
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=item splitdir (override) |
| 367 |
|
|
|
| 368 |
|
|
Split dirspec using VMS syntax. |
| 369 |
|
|
|
| 370 |
|
|
=cut |
| 371 |
|
|
|
| 372 |
|
|
sub splitdir { |
| 373 |
|
|
my($self,$dirspec) = @_; |
| 374 |
|
|
$dirspec =~ tr/<>/[]/; # < and > ==> [ and ] |
| 375 |
|
|
$dirspec =~ s/\]\[\./\.\]\[/g; # ][. ==> .][ |
| 376 |
|
|
$dirspec =~ s/\[000000\.\]\[/\[/g; # [000000.][ ==> [ |
| 377 |
|
|
$dirspec =~ s/\[000000\./\[/g; # [000000. ==> [ |
| 378 |
|
|
$dirspec =~ s/\.\]\[000000\]/\]/g; # .][000000] ==> ] |
| 379 |
|
|
$dirspec =~ s/\.\]\[/\./g; # foo.][bar ==> foo.bar |
| 380 |
|
|
while ($dirspec =~ s/(^|[\[\<\.])\-(\-+)($|[\]\>\.])/$1-.$2$3/g) {} |
| 381 |
|
|
# That loop does the following |
| 382 |
|
|
# with any amount of dashes: |
| 383 |
|
|
# .--. ==> .-.-. |
| 384 |
|
|
# [--. ==> [-.-. |
| 385 |
|
|
# .--] ==> .-.-] |
| 386 |
|
|
# [--] ==> [-.-] |
| 387 |
|
|
$dirspec = "[$dirspec]" unless $dirspec =~ /[\[<]/; # make legal |
| 388 |
|
|
my(@dirs) = split('\.', vmspath($dirspec)); |
| 389 |
|
|
$dirs[0] =~ s/^[\[<]//s; $dirs[-1] =~ s/[\]>]\Z(?!\n)//s; |
| 390 |
|
|
@dirs; |
| 391 |
|
|
} |
| 392 |
|
|
|
| 393 |
|
|
|
| 394 |
|
|
=item catpath (override) |
| 395 |
|
|
|
| 396 |
|
|
Construct a complete filespec using VMS syntax |
| 397 |
|
|
|
| 398 |
|
|
=cut |
| 399 |
|
|
|
| 400 |
|
|
sub catpath { |
| 401 |
|
|
my($self,$dev,$dir,$file) = @_; |
| 402 |
|
|
|
| 403 |
|
|
# We look for a volume in $dev, then in $dir, but not both |
| 404 |
|
|
my ($dir_volume, $dir_dir, $dir_file) = $self->splitpath($dir); |
| 405 |
|
|
$dev = $dir_volume unless length $dev; |
| 406 |
|
|
$dir = length $dir_file ? $self->catfile($dir_dir, $dir_file) : $dir_dir; |
| 407 |
|
|
|
| 408 |
|
|
if ($dev =~ m|^/+([^/]+)|) { $dev = "$1:"; } |
| 409 |
|
|
else { $dev .= ':' unless $dev eq '' or $dev =~ /:\Z(?!\n)/; } |
| 410 |
|
|
if (length($dev) or length($dir)) { |
| 411 |
|
|
$dir = "[$dir]" unless $dir =~ /[\[<\/]/; |
| 412 |
|
|
$dir = vmspath($dir); |
| 413 |
|
|
} |
| 414 |
|
|
"$dev$dir$file"; |
| 415 |
|
|
} |
| 416 |
|
|
|
| 417 |
|
|
=item abs2rel (override) |
| 418 |
|
|
|
| 419 |
|
|
Use VMS syntax when converting filespecs. |
| 420 |
|
|
|
| 421 |
|
|
=cut |
| 422 |
|
|
|
| 423 |
|
|
sub abs2rel { |
| 424 |
|
|
my $self = shift; |
| 425 |
|
|
return vmspath(File::Spec::Unix::abs2rel( $self, @_ )) |
| 426 |
|
|
if grep m{/}, @_; |
| 427 |
|
|
|
| 428 |
|
|
my($path,$base) = @_; |
| 429 |
|
|
$base = $self->_cwd() unless defined $base and length $base; |
| 430 |
|
|
|
| 431 |
|
|
for ($path, $base) { $_ = $self->canonpath($_) } |
| 432 |
|
|
|
| 433 |
|
|
# Are we even starting $path on the same (node::)device as $base? Note that |
| 434 |
|
|
# logical paths or nodename differences may be on the "same device" |
| 435 |
|
|
# but the comparison that ignores device differences so as to concatenate |
| 436 |
|
|
# [---] up directory specs is not even a good idea in cases where there is |
| 437 |
|
|
# a logical path difference between $path and $base nodename and/or device. |
| 438 |
|
|
# Hence we fall back to returning the absolute $path spec |
| 439 |
|
|
# if there is a case blind device (or node) difference of any sort |
| 440 |
|
|
# and we do not even try to call $parse() or consult %ENV for $trnlnm() |
| 441 |
|
|
# (this module needs to run on non VMS platforms after all). |
| 442 |
|
|
|
| 443 |
|
|
my ($path_volume, $path_directories, $path_file) = $self->splitpath($path); |
| 444 |
|
|
my ($base_volume, $base_directories, $base_file) = $self->splitpath($base); |
| 445 |
|
|
return $path unless lc($path_volume) eq lc($base_volume); |
| 446 |
|
|
|
| 447 |
|
|
for ($path, $base) { $_ = $self->rel2abs($_) } |
| 448 |
|
|
|
| 449 |
|
|
# Now, remove all leading components that are the same |
| 450 |
|
|
my @pathchunks = $self->splitdir( $path_directories ); |
| 451 |
|
|
unshift(@pathchunks,'000000') unless $pathchunks[0] eq '000000'; |
| 452 |
|
|
my @basechunks = $self->splitdir( $base_directories ); |
| 453 |
|
|
unshift(@basechunks,'000000') unless $basechunks[0] eq '000000'; |
| 454 |
|
|
|
| 455 |
|
|
while ( @pathchunks && |
| 456 |
|
|
@basechunks && |
| 457 |
|
|
lc( $pathchunks[0] ) eq lc( $basechunks[0] ) |
| 458 |
|
|
) { |
| 459 |
|
|
shift @pathchunks ; |
| 460 |
|
|
shift @basechunks ; |
| 461 |
|
|
} |
| 462 |
|
|
|
| 463 |
|
|
# @basechunks now contains the directories to climb out of, |
| 464 |
|
|
# @pathchunks now has the directories to descend in to. |
| 465 |
|
|
$path_directories = join '.', ('-' x @basechunks, @pathchunks) ; |
| 466 |
|
|
return $self->canonpath( $self->catpath( '', $path_directories, $path_file ) ) ; |
| 467 |
|
|
} |
| 468 |
|
|
|
| 469 |
|
|
|
| 470 |
|
|
=item rel2abs (override) |
| 471 |
|
|
|
| 472 |
|
|
Use VMS syntax when converting filespecs. |
| 473 |
|
|
|
| 474 |
|
|
=cut |
| 475 |
|
|
|
| 476 |
|
|
sub rel2abs { |
| 477 |
|
|
my $self = shift ; |
| 478 |
|
|
my ($path,$base ) = @_; |
| 479 |
|
|
return undef unless defined $path; |
| 480 |
|
|
if ($path =~ m/\//) { |
| 481 |
|
|
$path = ( -d $path || $path =~ m/\/\z/ # educated guessing about |
| 482 |
|
|
? vmspath($path) # whether it's a directory |
| 483 |
|
|
: vmsify($path) ); |
| 484 |
|
|
} |
| 485 |
|
|
$base = vmspath($base) if defined $base && $base =~ m/\//; |
| 486 |
|
|
# Clean up and split up $path |
| 487 |
|
|
if ( ! $self->file_name_is_absolute( $path ) ) { |
| 488 |
|
|
# Figure out the effective $base and clean it up. |
| 489 |
|
|
if ( !defined( $base ) || $base eq '' ) { |
| 490 |
|
|
$base = $self->_cwd; |
| 491 |
|
|
} |
| 492 |
|
|
elsif ( ! $self->file_name_is_absolute( $base ) ) { |
| 493 |
|
|
$base = $self->rel2abs( $base ) ; |
| 494 |
|
|
} |
| 495 |
|
|
else { |
| 496 |
|
|
$base = $self->canonpath( $base ) ; |
| 497 |
|
|
} |
| 498 |
|
|
|
| 499 |
|
|
# Split up paths |
| 500 |
|
|
my ( $path_directories, $path_file ) = |
| 501 |
|
|
($self->splitpath( $path ))[1,2] ; |
| 502 |
|
|
|
| 503 |
|
|
my ( $base_volume, $base_directories ) = |
| 504 |
|
|
$self->splitpath( $base ) ; |
| 505 |
|
|
|
| 506 |
|
|
$path_directories = '' if $path_directories eq '[]' || |
| 507 |
|
|
$path_directories eq '<>'; |
| 508 |
|
|
my $sep = '' ; |
| 509 |
|
|
$sep = '.' |
| 510 |
|
|
if ( $base_directories =~ m{[^.\]>]\Z(?!\n)} && |
| 511 |
|
|
$path_directories =~ m{^[^.\[<]}s |
| 512 |
|
|
) ; |
| 513 |
|
|
$base_directories = "$base_directories$sep$path_directories"; |
| 514 |
|
|
$base_directories =~ s{\.?[\]>][\[<]\.?}{.}; |
| 515 |
|
|
|
| 516 |
|
|
$path = $self->catpath( $base_volume, $base_directories, $path_file ); |
| 517 |
|
|
} |
| 518 |
|
|
|
| 519 |
|
|
return $self->canonpath( $path ) ; |
| 520 |
|
|
} |
| 521 |
|
|
|
| 522 |
|
|
|
| 523 |
|
|
=back |
| 524 |
|
|
|
| 525 |
|
|
=head1 COPYRIGHT |
| 526 |
|
|
|
| 527 |
|
|
Copyright (c) 2004 by the Perl 5 Porters. All rights reserved. |
| 528 |
|
|
|
| 529 |
|
|
This program is free software; you can redistribute it and/or modify |
| 530 |
|
|
it under the same terms as Perl itself. |
| 531 |
|
|
|
| 532 |
|
|
=head1 SEE ALSO |
| 533 |
|
|
|
| 534 |
|
|
See L<File::Spec> and L<File::Spec::Unix>. This package overrides the |
| 535 |
|
|
implementation of these methods, not the semantics. |
| 536 |
|
|
|
| 537 |
|
|
An explanation of VMS file specs can be found at |
| 538 |
|
|
L<"http://h71000.www7.hp.com/doc/731FINAL/4506/4506pro_014.html#apps_locating_naming_files">. |
| 539 |
|
|
|
| 540 |
|
|
=cut |
| 541 |
|
|
|
| 542 |
|
|
1; |
