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270d1e39 |
1 | package File::Spec::VMS; |
2 | |
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3 | use strict; |
4 | use vars qw(@ISA); |
5 | require File::Spec::Unix; |
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6 | @ISA = qw(File::Spec::Unix); |
7 | |
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8 | use File::Basename; |
9 | use VMS::Filespec; |
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10 | |
11 | =head1 NAME |
12 | |
13 | File::Spec::VMS - methods for VMS file specs |
14 | |
15 | =head1 SYNOPSIS |
16 | |
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17 | require File::Spec::VMS; # Done internally by File::Spec if needed |
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18 | |
19 | =head1 DESCRIPTION |
20 | |
21 | See File::Spec::Unix for a documentation of the methods provided |
22 | there. This package overrides the implementation of these methods, not |
23 | the semantics. |
24 | |
1f47e8e2 |
25 | =cut |
26 | |
27 | sub eliminate_macros { |
28 | my($self,$path) = @_; |
29 | return '' unless $path; |
30 | $self = {} unless ref $self; |
31 | my($npath) = unixify($path); |
32 | my($complex) = 0; |
33 | my($head,$macro,$tail); |
34 | |
35 | # perform m##g in scalar context so it acts as an iterator |
36 | while ($npath =~ m#(.*?)\$\((\S+?)\)(.*)#g) { |
37 | if ($self->{$2}) { |
38 | ($head,$macro,$tail) = ($1,$2,$3); |
39 | if (ref $self->{$macro}) { |
40 | if (ref $self->{$macro} eq 'ARRAY') { |
41 | $macro = join ' ', @{$self->{$macro}}; |
42 | } |
43 | else { |
44 | print "Note: can't expand macro \$($macro) containing ",ref($self->{$macro}), |
45 | "\n\t(using MMK-specific deferred substitutuon; MMS will break)\n"; |
46 | $macro = "\cB$macro\cB"; |
47 | $complex = 1; |
48 | } |
49 | } |
50 | else { ($macro = unixify($self->{$macro})) =~ s#/$##; } |
51 | $npath = "$head$macro$tail"; |
52 | } |
53 | } |
54 | if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#g; } |
55 | $npath; |
56 | } |
57 | |
58 | sub fixpath { |
59 | my($self,$path,$force_path) = @_; |
60 | return '' unless $path; |
61 | $self = bless {} unless ref $self; |
62 | my($fixedpath,$prefix,$name); |
63 | |
64 | if ($path =~ m#^\$\([^\)]+\)$# || $path =~ m#[/:>\]]#) { |
65 | if ($force_path or $path =~ /(?:DIR\)|\])$/) { |
66 | $fixedpath = vmspath($self->eliminate_macros($path)); |
67 | } |
68 | else { |
69 | $fixedpath = vmsify($self->eliminate_macros($path)); |
70 | } |
71 | } |
72 | elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#)) && $self->{$prefix}) { |
73 | my($vmspre) = $self->eliminate_macros("\$($prefix)"); |
74 | # is it a dir or just a name? |
75 | $vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR$/) ? vmspath($vmspre) : ''; |
76 | $fixedpath = ($vmspre ? $vmspre : $self->{$prefix}) . $name; |
77 | $fixedpath = vmspath($fixedpath) if $force_path; |
78 | } |
79 | else { |
80 | $fixedpath = $path; |
81 | $fixedpath = vmspath($fixedpath) if $force_path; |
82 | } |
83 | # No hints, so we try to guess |
84 | if (!defined($force_path) and $fixedpath !~ /[:>(.\]]/) { |
85 | $fixedpath = vmspath($fixedpath) if -d $fixedpath; |
86 | } |
87 | # Trim off root dirname if it's had other dirs inserted in front of it. |
88 | $fixedpath =~ s/\.000000([\]>])/$1/; |
89 | $fixedpath; |
90 | } |
91 | |
92 | |
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93 | =head2 Methods always loaded |
94 | |
95 | =over |
96 | |
97 | =item catdir |
98 | |
99 | Concatenates a list of file specifications, and returns the result as a |
100 | VMS-syntax directory specification. |
101 | |
102 | =cut |
103 | |
104 | sub catdir { |
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105 | my ($self,@dirs) = @_; |
106 | my $dir = pop @dirs; |
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107 | @dirs = grep($_,@dirs); |
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108 | my $rslt; |
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109 | if (@dirs) { |
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110 | my $path = (@dirs == 1 ? $dirs[0] : $self->catdir(@dirs)); |
111 | my ($spath,$sdir) = ($path,$dir); |
112 | $spath =~ s/.dir$//; $sdir =~ s/.dir$//; |
113 | $sdir = $self->eliminate_macros($sdir) unless $sdir =~ /^[\w\-]+$/; |
114 | $rslt = $self->fixpath($self->eliminate_macros($spath)."/$sdir",1); |
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115 | } |
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116 | else { |
117 | if ($dir =~ /^\$\([^\)]+\)$/) { $rslt = $dir; } |
118 | else { $rslt = vmspath($dir); } |
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119 | } |
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120 | return $rslt; |
270d1e39 |
121 | } |
122 | |
123 | =item catfile |
124 | |
125 | Concatenates a list of file specifications, and returns the result as a |
126 | VMS-syntax directory specification. |
127 | |
128 | =cut |
129 | |
130 | sub catfile { |
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131 | my ($self,@files) = @_; |
132 | my $file = pop @files; |
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133 | @files = grep($_,@files); |
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134 | my $rslt; |
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135 | if (@files) { |
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136 | my $path = (@files == 1 ? $files[0] : $self->catdir(@files)); |
137 | my $spath = $path; |
138 | $spath =~ s/.dir$//; |
139 | if ($spath =~ /^[^\)\]\/:>]+\)$/ && basename($file) eq $file) { |
140 | $rslt = "$spath$file"; |
141 | } |
142 | else { |
143 | $rslt = $self->eliminate_macros($spath); |
144 | $rslt = vmsify($rslt.($rslt ? '/' : '').unixify($file)); |
145 | } |
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146 | } |
147 | else { $rslt = vmsify($file); } |
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148 | return $rslt; |
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149 | } |
150 | |
151 | =item curdir (override) |
152 | |
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153 | Returns a string representation of the current directory: '[]' |
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154 | |
155 | =cut |
156 | |
157 | sub curdir { |
158 | return '[]'; |
159 | } |
160 | |
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161 | =item devnull (override) |
162 | |
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163 | Returns a string representation of the null device: '_NLA0:' |
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164 | |
165 | =cut |
166 | |
167 | sub devnull { |
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168 | return "_NLA0:"; |
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169 | } |
170 | |
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171 | =item rootdir (override) |
172 | |
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173 | Returns a string representation of the root directory: 'SYS$DISK:[000000]' |
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174 | |
175 | =cut |
176 | |
177 | sub rootdir { |
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178 | return 'SYS$DISK:[000000]'; |
179 | } |
180 | |
181 | =item tmpdir (override) |
182 | |
183 | Returns a string representation of the first writable directory |
184 | from the following list or '' if none are writable: |
185 | |
186 | /sys$scratch |
187 | $ENV{TMPDIR} |
188 | |
189 | =cut |
190 | |
191 | my $tmpdir; |
192 | sub tmpdir { |
193 | return $tmpdir if defined $tmpdir; |
194 | foreach ('/sys$scratch', $ENV{TMPDIR}) { |
195 | next unless defined && -d && -w _; |
196 | $tmpdir = $_; |
197 | last; |
198 | } |
199 | $tmpdir = '' unless defined $tmpdir; |
200 | return $tmpdir; |
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201 | } |
202 | |
203 | =item updir (override) |
204 | |
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205 | Returns a string representation of the parent directory: '[-]' |
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206 | |
207 | =cut |
208 | |
209 | sub updir { |
210 | return '[-]'; |
211 | } |
212 | |
213 | =item path (override) |
214 | |
215 | Translate logical name DCL$PATH as a searchlist, rather than trying |
216 | to C<split> string value of C<$ENV{'PATH'}>. |
217 | |
218 | =cut |
219 | |
220 | sub path { |
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221 | my (@dirs,$dir,$i); |
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222 | while ($dir = $ENV{'DCL$PATH;' . $i++}) { push(@dirs,$dir); } |
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223 | return @dirs; |
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224 | } |
225 | |
226 | =item file_name_is_absolute (override) |
227 | |
228 | Checks for VMS directory spec as well as Unix separators. |
229 | |
230 | =cut |
231 | |
232 | sub file_name_is_absolute { |
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233 | my ($self,$file) = @_; |
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234 | # If it's a logical name, expand it. |
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235 | $file = $ENV{$file} while $file =~ /^[\w\$\-]+$/ && $ENV{$file}; |
236 | return scalar($file =~ m!^/! || |
237 | $file =~ m![<\[][^.\-\]>]! || |
238 | $file =~ /:[^<\[]/); |
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239 | } |
240 | |
cbc7acb0 |
241 | =back |
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242 | |
cbc7acb0 |
243 | =head1 SEE ALSO |
244 | |
245 | L<File::Spec> |
246 | |
247 | =cut |
248 | |
249 | 1; |