1 package File::Spec::VMS;
4 use vars qw(@ISA $VERSION);
5 require File::Spec::Unix;
9 @ISA = qw(File::Spec::Unix);
16 File::Spec::VMS - methods for VMS file specs
20 require File::Spec::VMS; # Done internally by File::Spec if needed
24 See File::Spec::Unix for a documentation of the methods provided
25 there. This package overrides the implementation of these methods, not
30 =item canonpath (override)
32 Removes redundant portions of file specifications according to VMS syntax.
39 return undef unless defined $path;
41 if ($path =~ m|/|) { # Fake Unix
42 my $pathify = $path =~ m|/\Z(?!\n)|;
43 $path = $self->SUPER::canonpath($path);
44 if ($pathify) { return vmspath($path); }
45 else { return vmsify($path); }
48 $path =~ tr/<>/[]/; # < and > ==> [ and ]
49 $path =~ s/\]\[\./\.\]\[/g; # ][. ==> .][
50 $path =~ s/\[000000\.\]\[/\[/g; # [000000.][ ==> [
51 $path =~ s/\[000000\./\[/g; # [000000. ==> [
52 $path =~ s/\.\]\[000000\]/\]/g; # .][000000] ==> ]
53 $path =~ s/\.\]\[/\./g; # foo.][bar ==> foo.bar
54 1 while ($path =~ s/([\[\.])(-+)\.(-+)([\.\]])/$1$2$3$4/);
55 # That loop does the following
56 # with any amount of dashes:
61 1 while ($path =~ s/([\[\.])[^\]\.]+\.-(-+)([\]\.])/$1$2$3/);
62 # That loop does the following
63 # with any amount (minimum 2)
70 # And then, the remaining cases
71 $path =~ s/\[\.-/[-/; # [.- ==> [-
72 $path =~ s/\.[^\]\.]+\.-\./\./g; # .foo.-. ==> .
73 $path =~ s/\[[^\]\.]+\.-\./\[/g; # [foo.-. ==> [
74 $path =~ s/\.[^\]\.]+\.-\]/\]/g; # .foo.-] ==> ]
75 $path =~ s/\[[^\]\.]+\.-\]/\[000000\]/g;# [foo.-] ==> [000000]
76 $path =~ s/\[\]// unless $path eq '[]'; # [] ==>
81 =item catdir (override)
83 Concatenates a list of file specifications, and returns the result as a
84 VMS-syntax directory specification. No check is made for "impossible"
85 cases (e.g. elements other than the first being absolute filespecs).
92 my @dirs = grep {defined() && length()} @_;
96 my $path = (@dirs == 1 ? $dirs[0] : $self->catdir(@dirs));
97 my ($spath,$sdir) = ($path,$dir);
98 $spath =~ s/\.dir\Z(?!\n)//; $sdir =~ s/\.dir\Z(?!\n)//;
99 $sdir = $self->eliminate_macros($sdir) unless $sdir =~ /^[\w\-]+\Z(?!\n)/s;
100 $rslt = $self->fixpath($self->eliminate_macros($spath)."/$sdir",1);
102 # Special case for VMS absolute directory specs: these will have had device
103 # prepended during trip through Unix syntax in eliminate_macros(), since
104 # Unix syntax has no way to express "absolute from the top of this device's
106 if ($spath =~ /^[\[<][^.\-]/s) { $rslt =~ s/^[^\[<]+//s; }
109 if (not defined $dir or not length $dir) { $rslt = ''; }
110 elsif ($dir =~ /^\$\([^\)]+\)\Z(?!\n)/s) { $rslt = $dir; }
111 else { $rslt = vmspath($dir); }
113 return $self->canonpath($rslt);
116 =item catfile (override)
118 Concatenates a list of file specifications, and returns the result as a
119 VMS-syntax file specification.
125 my $file = $self->canonpath(pop());
126 my @files = grep {defined() && length()} @_;
130 my $path = (@files == 1 ? $files[0] : $self->catdir(@files));
132 $spath =~ s/\.dir\Z(?!\n)//;
133 if ($spath =~ /^[^\)\]\/:>]+\)\Z(?!\n)/s && basename($file) eq $file) {
134 $rslt = "$spath$file";
137 $rslt = $self->eliminate_macros($spath);
138 $rslt = vmsify($rslt.((defined $rslt) && ($rslt ne '') ? '/' : '').unixify($file));
141 else { $rslt = (defined($file) && length($file)) ? vmsify($file) : ''; }
142 return $self->canonpath($rslt);
146 =item curdir (override)
148 Returns a string representation of the current directory: '[]'
156 =item devnull (override)
158 Returns a string representation of the null device: '_NLA0:'
166 =item rootdir (override)
168 Returns a string representation of the root directory: 'SYS$DISK:[000000]'
173 return 'SYS$DISK:[000000]';
176 =item tmpdir (override)
178 Returns a string representation of the first writable directory
179 from the following list or '' if none are writable:
184 Since perl 5.8.0, if running under taint mode, and if $ENV{TMPDIR}
185 is tainted, it is not used.
191 return $tmpdir if defined $tmpdir;
192 $tmpdir = $_[0]->_tmpdir( 'sys$scratch:', $ENV{TMPDIR} );
195 =item updir (override)
197 Returns a string representation of the parent directory: '[-]'
205 =item case_tolerant (override)
207 VMS file specification syntax is case-tolerant.
215 =item path (override)
217 Translate logical name DCL$PATH as a searchlist, rather than trying
218 to C<split> string value of C<$ENV{'PATH'}>.
224 while ($dir = $ENV{'DCL$PATH;' . $i++}) { push(@dirs,$dir); }
228 =item file_name_is_absolute (override)
230 Checks for VMS directory spec as well as Unix separators.
234 sub file_name_is_absolute {
235 my ($self,$file) = @_;
236 # If it's a logical name, expand it.
237 $file = $ENV{$file} while $file =~ /^[\w\$\-]+\Z(?!\n)/s && $ENV{$file};
238 return scalar($file =~ m!^/!s ||
239 $file =~ m![<\[][^.\-\]>]! ||
243 =item splitpath (override)
245 Splits using VMS syntax.
250 my($self,$path) = @_;
251 my($dev,$dir,$file) = ('','','');
253 vmsify($path) =~ /(.+:)?([\[<].*[\]>])?(.*)/s;
254 return ($1 || '',$2 || '',$3);
257 =item splitdir (override)
259 Split dirspec using VMS syntax.
264 my($self,$dirspec) = @_;
266 return @dirs if ( (!defined $dirspec) || ('' eq $dirspec) );
267 $dirspec =~ tr/<>/[]/; # < and > ==> [ and ]
268 $dirspec =~ s/\]\[\./\.\]\[/g; # ][. ==> .][
269 $dirspec =~ s/\[000000\.\]\[/\[/g; # [000000.][ ==> [
270 $dirspec =~ s/\[000000\./\[/g; # [000000. ==> [
271 $dirspec =~ s/\.\]\[000000\]/\]/g; # .][000000] ==> ]
272 $dirspec =~ s/\.\]\[/\./g; # foo.][bar ==> foo.bar
273 while ($dirspec =~ s/(^|[\[\<\.])\-(\-+)($|[\]\>\.])/$1-.$2$3/g) {}
274 # That loop does the following
275 # with any amount of dashes:
280 $dirspec = "[$dirspec]" unless $dirspec =~ /[\[<]/; # make legal
281 $dirspec =~ s/^(\[|<)\./$1/;
282 @dirs = split /(?<!\^)\./, vmspath($dirspec);
283 $dirs[0] =~ s/^[\[<]//s; $dirs[-1] =~ s/[\]>]\Z(?!\n)//s;
288 =item catpath (override)
290 Construct a complete filespec using VMS syntax
295 my($self,$dev,$dir,$file) = @_;
297 # We look for a volume in $dev, then in $dir, but not both
298 my ($dir_volume, $dir_dir, $dir_file) = $self->splitpath($dir);
299 $dev = $dir_volume unless length $dev;
300 $dir = length $dir_file ? $self->catfile($dir_dir, $dir_file) : $dir_dir;
302 if ($dev =~ m|^/+([^/]+)|) { $dev = "$1:"; }
303 else { $dev .= ':' unless $dev eq '' or $dev =~ /:\Z(?!\n)/; }
304 if (length($dev) or length($dir)) {
305 $dir = "[$dir]" unless $dir =~ /[\[<\/]/;
306 $dir = vmspath($dir);
311 =item abs2rel (override)
313 Use VMS syntax when converting filespecs.
319 return vmspath(File::Spec::Unix::abs2rel( $self, @_ ))
322 my($path,$base) = @_;
323 $base = $self->_cwd() unless defined $base and length $base;
325 for ($path, $base) { $_ = $self->canonpath($_) }
327 # Are we even starting $path on the same (node::)device as $base? Note that
328 # logical paths or nodename differences may be on the "same device"
329 # but the comparison that ignores device differences so as to concatenate
330 # [---] up directory specs is not even a good idea in cases where there is
331 # a logical path difference between $path and $base nodename and/or device.
332 # Hence we fall back to returning the absolute $path spec
333 # if there is a case blind device (or node) difference of any sort
334 # and we do not even try to call $parse() or consult %ENV for $trnlnm()
335 # (this module needs to run on non VMS platforms after all).
337 my ($path_volume, $path_directories, $path_file) = $self->splitpath($path);
338 my ($base_volume, $base_directories, $base_file) = $self->splitpath($base);
339 return $path unless lc($path_volume) eq lc($base_volume);
341 for ($path, $base) { $_ = $self->rel2abs($_) }
343 # Now, remove all leading components that are the same
344 my @pathchunks = $self->splitdir( $path_directories );
345 my $pathchunks = @pathchunks;
346 unshift(@pathchunks,'000000') unless $pathchunks[0] eq '000000';
347 my @basechunks = $self->splitdir( $base_directories );
348 my $basechunks = @basechunks;
349 unshift(@basechunks,'000000') unless $basechunks[0] eq '000000';
351 while ( @pathchunks &&
353 lc( $pathchunks[0] ) eq lc( $basechunks[0] )
359 # @basechunks now contains the directories to climb out of,
360 # @pathchunks now has the directories to descend in to.
361 if ((@basechunks > 0) || ($basechunks != $pathchunks)) {
362 $path_directories = join '.', ('-' x @basechunks, @pathchunks) ;
365 $path_directories = join '.', @pathchunks;
367 $path_directories = '['.$path_directories.']';
368 return $self->canonpath( $self->catpath( '', $path_directories, $path_file ) ) ;
372 =item rel2abs (override)
374 Use VMS syntax when converting filespecs.
380 my ($path,$base ) = @_;
381 return undef unless defined $path;
382 if ($path =~ m/\//) {
383 $path = ( -d $path || $path =~ m/\/\z/ # educated guessing about
384 ? vmspath($path) # whether it's a directory
387 $base = vmspath($base) if defined $base && $base =~ m/\//;
388 # Clean up and split up $path
389 if ( ! $self->file_name_is_absolute( $path ) ) {
390 # Figure out the effective $base and clean it up.
391 if ( !defined( $base ) || $base eq '' ) {
394 elsif ( ! $self->file_name_is_absolute( $base ) ) {
395 $base = $self->rel2abs( $base ) ;
398 $base = $self->canonpath( $base ) ;
402 my ( $path_directories, $path_file ) =
403 ($self->splitpath( $path ))[1,2] ;
405 my ( $base_volume, $base_directories ) =
406 $self->splitpath( $base ) ;
408 $path_directories = '' if $path_directories eq '[]' ||
409 $path_directories eq '<>';
412 if ( $base_directories =~ m{[^.\]>]\Z(?!\n)} &&
413 $path_directories =~ m{^[^.\[<]}s
415 $base_directories = "$base_directories$sep$path_directories";
416 $base_directories =~ s{\.?[\]>][\[<]\.?}{.};
418 $path = $self->catpath( $base_volume, $base_directories, $path_file );
421 return $self->canonpath( $path ) ;
425 # eliminate_macros() and fixpath() are MakeMaker-specific methods
426 # which are used inside catfile() and catdir(). MakeMaker has its own
427 # copies as of 6.06_03 which are the canonical ones. We leave these
428 # here, in peace, so that File::Spec continues to work with MakeMakers
431 # Please consider these two methods deprecated. Do not patch them,
432 # patch the ones in ExtUtils::MM_VMS instead.
433 sub eliminate_macros {
434 my($self,$path) = @_;
435 return '' unless (defined $path) && ($path ne '');
436 $self = {} unless ref $self;
439 return join ' ', map { $self->eliminate_macros($_) } split /\s+/, $path;
442 my($npath) = unixify($path);
444 my($head,$macro,$tail);
446 # perform m##g in scalar context so it acts as an iterator
447 while ($npath =~ m#(.*?)\$\((\S+?)\)(.*)#gs) {
449 ($head,$macro,$tail) = ($1,$2,$3);
450 if (ref $self->{$macro}) {
451 if (ref $self->{$macro} eq 'ARRAY') {
452 $macro = join ' ', @{$self->{$macro}};
455 print "Note: can't expand macro \$($macro) containing ",ref($self->{$macro}),
456 "\n\t(using MMK-specific deferred substitutuon; MMS will break)\n";
457 $macro = "\cB$macro\cB";
461 else { ($macro = unixify($self->{$macro})) =~ s#/\Z(?!\n)##; }
462 $npath = "$head$macro$tail";
465 if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#gs; }
469 # Deprecated. See the note above for eliminate_macros().
471 my($self,$path,$force_path) = @_;
472 return '' unless $path;
473 $self = bless {} unless ref $self;
474 my($fixedpath,$prefix,$name);
478 map { $self->fixpath($_,$force_path) }
482 if ($path =~ m#^\$\([^\)]+\)\Z(?!\n)#s || $path =~ m#[/:>\]]#) {
483 if ($force_path or $path =~ /(?:DIR\)|\])\Z(?!\n)/) {
484 $fixedpath = vmspath($self->eliminate_macros($path));
487 $fixedpath = vmsify($self->eliminate_macros($path));
490 elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#s)) && $self->{$prefix}) {
491 my($vmspre) = $self->eliminate_macros("\$($prefix)");
492 # is it a dir or just a name?
493 $vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR\Z(?!\n)/) ? vmspath($vmspre) : '';
494 $fixedpath = ($vmspre ? $vmspre : $self->{$prefix}) . $name;
495 $fixedpath = vmspath($fixedpath) if $force_path;
499 $fixedpath = vmspath($fixedpath) if $force_path;
501 # No hints, so we try to guess
502 if (!defined($force_path) and $fixedpath !~ /[:>(.\]]/) {
503 $fixedpath = vmspath($fixedpath) if -d $fixedpath;
506 # Trim off root dirname if it's had other dirs inserted in front of it.
507 $fixedpath =~ s/\.000000([\]>])/$1/;
508 # Special case for VMS absolute directory specs: these will have had device
509 # prepended during trip through Unix syntax in eliminate_macros(), since
510 # Unix syntax has no way to express "absolute from the top of this device's
512 if ($path =~ /^[\[>][^.\-]/) { $fixedpath =~ s/^[^\[<]+//; }
521 Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
523 This program is free software; you can redistribute it and/or modify
524 it under the same terms as Perl itself.
528 See L<File::Spec> and L<File::Spec::Unix>. This package overrides the
529 implementation of these methods, not the semantics.
531 An explanation of VMS file specs can be found at
532 L<"http://h71000.www7.hp.com/doc/731FINAL/4506/4506pro_014.html#apps_locating_naming_files">.