1 package File::Spec::VMS;
4 use vars qw(@ISA $VERSION);
5 require File::Spec::Unix;
9 @ISA = qw(File::Spec::Unix);
17 File::Spec::VMS - methods for VMS file specs
21 require File::Spec::VMS; # Done internally by File::Spec if needed
25 See File::Spec::Unix for a documentation of the methods provided
26 there. This package overrides the implementation of these methods, not
31 =item eliminate_macros
33 Expands MM[KS]/Make macros in a text string, using the contents of
34 identically named elements of C<%$self>, and returns the result
35 as a file specification in Unix syntax.
39 sub eliminate_macros {
41 return '' unless $path;
42 $self = {} unless ref $self;
45 return join ' ', map { $self->eliminate_macros($_) } split /\s+/, $path;
48 my($npath) = unixify($path);
50 my($head,$macro,$tail);
52 # perform m##g in scalar context so it acts as an iterator
53 while ($npath =~ m#(.*?)\$\((\S+?)\)(.*)#gs) {
55 ($head,$macro,$tail) = ($1,$2,$3);
56 if (ref $self->{$macro}) {
57 if (ref $self->{$macro} eq 'ARRAY') {
58 $macro = join ' ', @{$self->{$macro}};
61 print "Note: can't expand macro \$($macro) containing ",ref($self->{$macro}),
62 "\n\t(using MMK-specific deferred substitutuon; MMS will break)\n";
63 $macro = "\cB$macro\cB";
67 else { ($macro = unixify($self->{$macro})) =~ s#/\Z(?!\n)##; }
68 $npath = "$head$macro$tail";
71 if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#gs; }
77 Catchall routine to clean up problem MM[SK]/Make macros. Expands macros
78 in any directory specification, in order to avoid juxtaposing two
79 VMS-syntax directories when MM[SK] is run. Also expands expressions which
80 are all macro, so that we can tell how long the expansion is, and avoid
81 overrunning DCL's command buffer when MM[KS] is running.
83 If optional second argument has a TRUE value, then the return string is
84 a VMS-syntax directory specification, if it is FALSE, the return string
85 is a VMS-syntax file specification, and if it is not specified, fixpath()
86 checks to see whether it matches the name of a directory in the current
87 default directory, and returns a directory or file specification accordingly.
92 my($self,$path,$force_path) = @_;
93 return '' unless $path;
94 $self = bless {} unless ref $self;
95 my($fixedpath,$prefix,$name);
99 map { $self->fixpath($_,$force_path) }
103 if ($path =~ m#^\$\([^\)]+\)\Z(?!\n)#s || $path =~ m#[/:>\]]#) {
104 if ($force_path or $path =~ /(?:DIR\)|\])\Z(?!\n)/) {
105 $fixedpath = vmspath($self->eliminate_macros($path));
108 $fixedpath = vmsify($self->eliminate_macros($path));
111 elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#s)) && $self->{$prefix}) {
112 my($vmspre) = $self->eliminate_macros("\$($prefix)");
113 # is it a dir or just a name?
114 $vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR\Z(?!\n)/) ? vmspath($vmspre) : '';
115 $fixedpath = ($vmspre ? $vmspre : $self->{$prefix}) . $name;
116 $fixedpath = vmspath($fixedpath) if $force_path;
120 $fixedpath = vmspath($fixedpath) if $force_path;
122 # No hints, so we try to guess
123 if (!defined($force_path) and $fixedpath !~ /[:>(.\]]/) {
124 $fixedpath = vmspath($fixedpath) if -d $fixedpath;
127 # Trim off root dirname if it's had other dirs inserted in front of it.
128 $fixedpath =~ s/\.000000([\]>])/$1/;
129 # Special case for VMS absolute directory specs: these will have had device
130 # prepended during trip through Unix syntax in eliminate_macros(), since
131 # Unix syntax has no way to express "absolute from the top of this device's
133 if ($path =~ /^[\[>][^.\-]/) { $fixedpath =~ s/^[^\[<]+//; }
139 =head2 Methods always loaded
143 =item canonpath (override)
145 Removes redundant portions of file specifications according to VMS syntax.
150 my($self,$path) = @_;
152 if ($path =~ m|/|) { # Fake Unix
153 my $pathify = $path =~ m|/\Z(?!\n)|;
154 $path = $self->SUPER::canonpath($path);
155 if ($pathify) { return vmspath($path); }
156 else { return vmsify($path); }
159 $path =~ s-\]\[--g; $path =~ s/><//g; # foo.][bar ==> foo.bar
160 $path =~ s/([\[<])000000\./$1/; # [000000.foo ==> [foo
161 $path =~ s/([^-]+)\.000000([\]\>])/$1$2/; # foo.000000] ==> foo]
162 1 while $path =~ s{([\[<-])\.-}{$1-}; # [.-.- ==> [--
163 $path =~ s/\.[^\[<\.]+\.-([\]\>])/$1/; # bar.foo.-] ==> bar]
164 $path =~ s/([\[<])(-+)/$1 . "\cx" x length($2)/e; # encode leading '-'s
165 $path =~ s/([\[<\.])([^\[<\.\cx]+)\.-\.?/$1/g; # bar.-.foo ==> foo
166 $path =~ s/([\[<])(\cx+)/$1 . '-' x length($2)/e; # then decode
173 Concatenates a list of file specifications, and returns the result as a
174 VMS-syntax directory specification. No check is made for "impossible"
175 cases (e.g. elements other than the first being absolute filespecs).
180 my ($self,@dirs) = @_;
182 @dirs = grep($_,@dirs);
185 my $path = (@dirs == 1 ? $dirs[0] : $self->catdir(@dirs));
186 my ($spath,$sdir) = ($path,$dir);
187 $spath =~ s/\.dir\Z(?!\n)//; $sdir =~ s/\.dir\Z(?!\n)//;
188 $sdir = $self->eliminate_macros($sdir) unless $sdir =~ /^[\w\-]+\Z(?!\n)/s;
189 $rslt = $self->fixpath($self->eliminate_macros($spath)."/$sdir",1);
191 # Special case for VMS absolute directory specs: these will have had device
192 # prepended during trip through Unix syntax in eliminate_macros(), since
193 # Unix syntax has no way to express "absolute from the top of this device's
195 if ($spath =~ /^[\[<][^.\-]/s) { $rslt =~ s/^[^\[<]+//s; }
198 if (not defined $dir or not length $dir) { $rslt = ''; }
199 elsif ($dir =~ /^\$\([^\)]+\)\Z(?!\n)/s) { $rslt = $dir; }
200 else { $rslt = vmspath($dir); }
202 return $self->canonpath($rslt);
207 Concatenates a list of file specifications, and returns the result as a
208 VMS-syntax file specification.
213 my ($self,@files) = @_;
214 my $file = pop @files;
215 @files = grep($_,@files);
218 my $path = (@files == 1 ? $files[0] : $self->catdir(@files));
220 $spath =~ s/\.dir\Z(?!\n)//;
221 if ($spath =~ /^[^\)\]\/:>]+\)\Z(?!\n)/s && basename($file) eq $file) {
222 $rslt = "$spath$file";
225 $rslt = $self->eliminate_macros($spath);
226 $rslt = vmsify($rslt.($rslt ? '/' : '').unixify($file));
229 else { $rslt = (defined($file) && length($file)) ? vmsify($file) : ''; }
230 return $self->canonpath($rslt);
234 =item curdir (override)
236 Returns a string representation of the current directory: '[]'
244 =item devnull (override)
246 Returns a string representation of the null device: '_NLA0:'
254 =item rootdir (override)
256 Returns a string representation of the root directory: 'SYS$DISK:[000000]'
261 return 'SYS$DISK:[000000]';
264 =item tmpdir (override)
266 Returns a string representation of the first writable directory
267 from the following list or '' if none are writable:
276 return $tmpdir if defined $tmpdir;
277 foreach ('sys$scratch:', $ENV{TMPDIR}) {
278 next unless defined && -d && -w _;
282 $tmpdir = '' unless defined $tmpdir;
286 =item updir (override)
288 Returns a string representation of the parent directory: '[-]'
296 =item case_tolerant (override)
298 VMS file specification syntax is case-tolerant.
306 =item path (override)
308 Translate logical name DCL$PATH as a searchlist, rather than trying
309 to C<split> string value of C<$ENV{'PATH'}>.
315 while ($dir = $ENV{'DCL$PATH;' . $i++}) { push(@dirs,$dir); }
319 =item file_name_is_absolute (override)
321 Checks for VMS directory spec as well as Unix separators.
325 sub file_name_is_absolute {
326 my ($self,$file) = @_;
327 # If it's a logical name, expand it.
328 $file = $ENV{$file} while $file =~ /^[\w\$\-]+\Z(?!\n)/s && $ENV{$file};
329 return scalar($file =~ m!^/!s ||
330 $file =~ m![<\[][^.\-\]>]! ||
334 =item splitpath (override)
336 Splits using VMS syntax.
341 my($self,$path) = @_;
342 my($dev,$dir,$file) = ('','','');
344 vmsify($path) =~ /(.+:)?([\[<].*[\]>])?(.*)/s;
345 return ($1 || '',$2 || '',$3);
348 =item splitdir (override)
350 Split dirspec using VMS syntax.
355 my($self,$dirspec) = @_;
356 $dirspec =~ s/\]\[//g; $dirspec =~ s/\-\-/-.-/g;
357 $dirspec = "[$dirspec]" unless $dirspec =~ /[\[<]/; # make legal
358 my(@dirs) = split('\.', vmspath($dirspec));
359 $dirs[0] =~ s/^[\[<]//s; $dirs[-1] =~ s/[\]>]\Z(?!\n)//s;
364 =item catpath (override)
366 Construct a complete filespec using VMS syntax
371 my($self,$dev,$dir,$file) = @_;
372 if ($dev =~ m|^/+([^/]+)|) { $dev = "$1:"; }
373 else { $dev .= ':' unless $dev eq '' or $dev =~ /:\Z(?!\n)/; }
374 if (length($dev) or length($dir)) {
375 $dir = "[$dir]" unless $dir =~ /[\[<\/]/;
376 $dir = vmspath($dir);
381 =item abs2rel (override)
383 Use VMS syntax when converting filespecs.
390 return vmspath(File::Spec::Unix::abs2rel( $self, @_ ))
391 if ( join( '', @_ ) =~ m{/} ) ;
393 my($path,$base) = @_;
395 # Note: we use '/' to glue things together here, then let canonpath()
396 # clean them up at the end.
399 if ( ! $self->file_name_is_absolute( $path ) ) {
400 $path = $self->rel2abs( $path ) ;
403 $path = $self->canonpath( $path ) ;
406 # Figure out the effective $base and clean it up.
407 if ( !defined( $base ) || $base eq '' ) {
410 elsif ( ! $self->file_name_is_absolute( $base ) ) {
411 $base = $self->rel2abs( $base ) ;
414 $base = $self->canonpath( $base ) ;
418 my ( $path_directories, $path_file ) =
419 ($self->splitpath( $path, 1 ))[1,2] ;
421 $path_directories = $1
422 if $path_directories =~ /^\[(.*)\]\Z(?!\n)/s ;
424 my $base_directories = ($self->splitpath( $base, 1 ))[1] ;
426 $base_directories = $1
427 if $base_directories =~ /^\[(.*)\]\Z(?!\n)/s ;
429 # Now, remove all leading components that are the same
430 my @pathchunks = $self->splitdir( $path_directories );
431 my @basechunks = $self->splitdir( $base_directories );
433 while ( @pathchunks &&
435 lc( $pathchunks[0] ) eq lc( $basechunks[0] )
441 # @basechunks now contains the directories to climb out of,
442 # @pathchunks now has the directories to descend in to.
443 $path_directories = '-.' x @basechunks . join( '.', @pathchunks ) ;
444 $path_directories =~ s{\.\Z(?!\n)}{} ;
445 return $self->canonpath( $self->catpath( '', $path_directories, $path_file ) ) ;
449 =item rel2abs (override)
451 Use VMS syntax when converting filespecs.
457 return vmspath(File::Spec::Unix::rel2abs( $self, @_ ))
458 if ( join( '', @_ ) =~ m{/} ) ;
460 my ($path,$base ) = @_;
461 # Clean up and split up $path
462 if ( ! $self->file_name_is_absolute( $path ) ) {
463 # Figure out the effective $base and clean it up.
464 if ( !defined( $base ) || $base eq '' ) {
467 elsif ( ! $self->file_name_is_absolute( $base ) ) {
468 $base = $self->rel2abs( $base ) ;
471 $base = $self->canonpath( $base ) ;
475 my ( $path_directories, $path_file ) =
476 ($self->splitpath( $path ))[1,2] ;
478 my ( $base_volume, $base_directories ) =
479 $self->splitpath( $base ) ;
481 $path_directories = '' if $path_directories eq '[]' ||
482 $path_directories eq '<>';
485 if ( $base_directories =~ m{[^.\]>]\Z(?!\n)} &&
486 $path_directories =~ m{^[^.\[<]}s
488 $base_directories = "$base_directories$sep$path_directories";
489 $base_directories =~ s{\.?[\]>][\[<]\.?}{.};
491 $path = $self->catpath( $base_volume, $base_directories, $path_file );
494 return $self->canonpath( $path ) ;