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1 | # -*- Mode: cperl; coding: utf-8; cperl-indent-level: 2 -*- |
2 | package CPAN::Tarzip; |
3 | use strict; |
4 | use vars qw($VERSION @ISA $BUGHUNTING); |
5 | use CPAN::Debug; |
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6 | use File::Basename (); |
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7 | $VERSION = sprintf "%.6f", substr(q$Rev: 659 $,4)/1000000 + 5.4; |
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8 | # module is internal to CPAN.pm |
9 | |
10 | @ISA = qw(CPAN::Debug); |
11 | $BUGHUNTING = 0; # released code must have turned off |
12 | |
13 | # it's ok if file doesn't exist, it just matters if it is .gz or .bz2 |
14 | sub new { |
15 | my($class,$file) = @_; |
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16 | $CPAN::Frontend->mydie("new called without arg") unless defined $file; |
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17 | if (0) { |
18 | # nonono, we get e.g. 01mailrc.txt uncompressed if only wget is available |
19 | $CPAN::Frontend->mydie("file[$file] doesn't match /\\.(bz2|gz|zip|tgz)\$/") |
20 | unless $file =~ /\.(bz2|gz|zip|tgz)$/i; |
21 | } |
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22 | my $me = { FILE => $file }; |
23 | if (0) { |
24 | } elsif ($file =~ /\.bz2$/i) { |
25 | unless ($me->{UNGZIPPRG} = $CPAN::Config->{bzip2}) { |
26 | my $bzip2; |
27 | if ($CPAN::META->has_inst("File::Which")) { |
28 | $bzip2 = File::Which::which("bzip2"); |
29 | } |
30 | if ($bzip2) { |
31 | $me->{UNGZIPPRG} = $bzip2; |
32 | } else { |
33 | $CPAN::Frontend->mydie(qq{ |
34 | CPAN.pm needs the external program bzip2 in order to handle '$file'. |
35 | Please install it now and run 'o conf init' to register it as external |
36 | program. |
37 | }); |
38 | } |
39 | } |
40 | } else { |
41 | # yes, we let gzip figure it out in *any* other case |
42 | $me->{UNGZIPPRG} = $CPAN::Config->{gzip}; |
43 | } |
44 | bless $me, $class; |
45 | } |
46 | |
47 | sub gzip { |
48 | my($self,$read) = @_; |
49 | my $write = $self->{FILE}; |
50 | if ($CPAN::META->has_inst("Compress::Zlib")) { |
51 | my($buffer,$fhw); |
52 | $fhw = FileHandle->new($read) |
53 | or $CPAN::Frontend->mydie("Could not open $read: $!"); |
54 | my $cwd = `pwd`; |
55 | my $gz = Compress::Zlib::gzopen($write, "wb") |
56 | or $CPAN::Frontend->mydie("Cannot gzopen $write: $! (pwd is $cwd)\n"); |
57 | $gz->gzwrite($buffer) |
58 | while read($fhw,$buffer,4096) > 0 ; |
59 | $gz->gzclose() ; |
60 | $fhw->close; |
61 | return 1; |
62 | } else { |
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63 | system(qq{$self->{UNGZIPPRG} -c "$read" > "$write"})==0; |
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64 | } |
65 | } |
66 | |
67 | |
68 | sub gunzip { |
69 | my($self,$write) = @_; |
70 | my $read = $self->{FILE}; |
71 | if ($CPAN::META->has_inst("Compress::Zlib")) { |
72 | my($buffer,$fhw); |
73 | $fhw = FileHandle->new(">$write") |
74 | or $CPAN::Frontend->mydie("Could not open >$write: $!"); |
75 | my $gz = Compress::Zlib::gzopen($read, "rb") |
76 | or $CPAN::Frontend->mydie("Cannot gzopen $read: $!\n"); |
77 | $fhw->print($buffer) |
78 | while $gz->gzread($buffer) > 0 ; |
79 | $CPAN::Frontend->mydie("Error reading from $read: $!\n") |
80 | if $gz->gzerror != Compress::Zlib::Z_STREAM_END(); |
81 | $gz->gzclose() ; |
82 | $fhw->close; |
83 | return 1; |
84 | } else { |
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85 | system(qq{$self->{UNGZIPPRG} -dc "$read" > "$write"})==0; |
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86 | } |
87 | } |
88 | |
89 | |
90 | sub gtest { |
91 | my($self) = @_; |
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92 | return $self->{GTEST} if exists $self->{GTEST}; |
93 | my $read = $self->{FILE} or die; |
94 | my $success; |
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95 | # After I had reread the documentation in zlib.h, I discovered that |
96 | # uncompressed files do not lead to an gzerror (anymore?). |
97 | if ( $CPAN::META->has_inst("Compress::Zlib") ) { |
98 | my($buffer,$len); |
99 | $len = 0; |
100 | my $gz = Compress::Zlib::gzopen($read, "rb") |
101 | or $CPAN::Frontend->mydie(sprintf("Cannot gzopen %s: %s\n", |
102 | $read, |
103 | $Compress::Zlib::gzerrno)); |
104 | while ($gz->gzread($buffer) > 0 ){ |
105 | $len += length($buffer); |
106 | $buffer = ""; |
107 | } |
108 | my $err = $gz->gzerror; |
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109 | $success = ! $err || $err == Compress::Zlib::Z_STREAM_END(); |
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110 | if ($len == -s $read){ |
111 | $success = 0; |
112 | CPAN->debug("hit an uncompressed file") if $CPAN::DEBUG; |
113 | } |
114 | $gz->gzclose(); |
115 | CPAN->debug("err[$err]success[$success]") if $CPAN::DEBUG; |
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116 | } else { |
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117 | $success = 0==system(qq{$self->{UNGZIPPRG} -qdt "$read"}); |
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118 | } |
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119 | return $self->{GTEST} = $success; |
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120 | } |
121 | |
122 | |
123 | sub TIEHANDLE { |
124 | my($class,$file) = @_; |
125 | my $ret; |
126 | $class->debug("file[$file]"); |
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127 | my $self = $class->new($file); |
128 | if (0) { |
129 | } elsif (!$self->gtest) { |
130 | my $fh = FileHandle->new($file) or die "Could not open file[$file]: $!"; |
131 | binmode $fh; |
132 | $self->{FH} = $fh; |
133 | } elsif ($CPAN::META->has_inst("Compress::Zlib")) { |
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134 | my $gz = Compress::Zlib::gzopen($file,"rb") or |
135 | die "Could not gzopen $file"; |
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136 | $self->{GZ} = $gz; |
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137 | } else { |
138 | my $pipe = "$CPAN::Config->{gzip} -dc $file |"; |
139 | my $fh = FileHandle->new($pipe) or die "Could not pipe[$pipe]: $!"; |
140 | binmode $fh; |
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141 | $self->{FH} = $fh; |
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142 | } |
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143 | $self; |
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144 | } |
145 | |
146 | |
147 | sub READLINE { |
148 | my($self) = @_; |
149 | if (exists $self->{GZ}) { |
150 | my $gz = $self->{GZ}; |
151 | my($line,$bytesread); |
152 | $bytesread = $gz->gzreadline($line); |
153 | return undef if $bytesread <= 0; |
154 | return $line; |
155 | } else { |
156 | my $fh = $self->{FH}; |
157 | return scalar <$fh>; |
158 | } |
159 | } |
160 | |
161 | |
162 | sub READ { |
163 | my($self,$ref,$length,$offset) = @_; |
164 | die "read with offset not implemented" if defined $offset; |
165 | if (exists $self->{GZ}) { |
166 | my $gz = $self->{GZ}; |
167 | my $byteread = $gz->gzread($$ref,$length);# 30eaf79e8b446ef52464b5422da328a8 |
168 | return $byteread; |
169 | } else { |
170 | my $fh = $self->{FH}; |
171 | return read($fh,$$ref,$length); |
172 | } |
173 | } |
174 | |
175 | |
176 | sub DESTROY { |
177 | my($self) = @_; |
178 | if (exists $self->{GZ}) { |
179 | my $gz = $self->{GZ}; |
180 | $gz->gzclose() if defined $gz; # hard to say if it is allowed |
181 | # to be undef ever. AK, 2000-09 |
182 | } else { |
183 | my $fh = $self->{FH}; |
184 | $fh->close if defined $fh; |
185 | } |
186 | undef $self; |
187 | } |
188 | |
189 | |
190 | sub untar { |
191 | my($self) = @_; |
192 | my $file = $self->{FILE}; |
193 | my($prefer) = 0; |
194 | |
195 | if (0) { # makes changing order easier |
196 | } elsif ($BUGHUNTING){ |
197 | $prefer=2; |
198 | } elsif (MM->maybe_command($self->{UNGZIPPRG}) |
199 | && |
200 | MM->maybe_command($CPAN::Config->{'tar'})) { |
201 | # should be default until Archive::Tar handles bzip2 |
202 | $prefer = 1; |
203 | } elsif ( |
204 | $CPAN::META->has_inst("Archive::Tar") |
205 | && |
206 | $CPAN::META->has_inst("Compress::Zlib") ) { |
207 | if ($file =~ /\.bz2$/) { |
208 | $CPAN::Frontend->mydie(qq{ |
209 | Archive::Tar lacks support for bz2. Can't continue. |
210 | }); |
211 | } |
212 | $prefer = 2; |
213 | } else { |
214 | $CPAN::Frontend->mydie(qq{ |
215 | CPAN.pm needs either the external programs tar, gzip and bzip2 |
216 | installed. Can't continue. |
217 | }); |
218 | } |
219 | if ($prefer==1) { # 1 => external gzip+tar |
220 | my($system); |
221 | my $is_compressed = $self->gtest(); |
222 | if ($is_compressed) { |
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223 | $system = qq{$self->{UNGZIPPRG} -dc }. |
224 | qq{< "$file" | $CPAN::Config->{tar} xvf -}; |
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225 | } else { |
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226 | $system = qq{$CPAN::Config->{tar} xvf "$file"}; |
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227 | } |
228 | if (system($system) != 0) { |
229 | # people find the most curious tar binaries that cannot handle |
230 | # pipes |
231 | if ($is_compressed) { |
232 | (my $ungzf = $file) =~ s/\.gz(?!\n)\Z//; |
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233 | $ungzf = File::Basename::basename($ungzf); |
234 | my $ct = CPAN::Tarzip->new($file); |
235 | if ($ct->gunzip($ungzf)) { |
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236 | $CPAN::Frontend->myprint(qq{Uncompressed $file successfully\n}); |
237 | } else { |
238 | $CPAN::Frontend->mydie(qq{Couldn\'t uncompress $file\n}); |
239 | } |
240 | $file = $ungzf; |
241 | } |
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242 | $system = qq{$CPAN::Config->{tar} xvf "$file"}; |
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243 | $CPAN::Frontend->myprint(qq{Using Tar:$system:\n}); |
244 | if (system($system)==0) { |
245 | $CPAN::Frontend->myprint(qq{Untarred $file successfully\n}); |
246 | } else { |
247 | $CPAN::Frontend->mydie(qq{Couldn\'t untar $file\n}); |
248 | } |
249 | return 1; |
250 | } else { |
251 | return 1; |
252 | } |
253 | } elsif ($prefer==2) { # 2 => modules |
254 | my $tar = Archive::Tar->new($file,1); |
255 | my $af; # archive file |
256 | my @af; |
257 | if ($BUGHUNTING) { |
258 | # RCS 1.337 had this code, it turned out unacceptable slow but |
259 | # it revealed a bug in Archive::Tar. Code is only here to hunt |
260 | # the bug again. It should never be enabled in published code. |
261 | # GDGraph3d-0.53 was an interesting case according to Larry |
262 | # Virden. |
263 | warn(">>>Bughunting code enabled<<< " x 20); |
264 | for $af ($tar->list_files) { |
265 | if ($af =~ m!^(/|\.\./)!) { |
266 | $CPAN::Frontend->mydie("ALERT: Archive contains ". |
267 | "illegal member [$af]"); |
268 | } |
269 | $CPAN::Frontend->myprint("$af\n"); |
270 | $tar->extract($af); # slow but effective for finding the bug |
271 | return if $CPAN::Signal; |
272 | } |
273 | } else { |
274 | for $af ($tar->list_files) { |
275 | if ($af =~ m!^(/|\.\./)!) { |
276 | $CPAN::Frontend->mydie("ALERT: Archive contains ". |
277 | "illegal member [$af]"); |
278 | } |
279 | $CPAN::Frontend->myprint("$af\n"); |
280 | push @af, $af; |
281 | return if $CPAN::Signal; |
282 | } |
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283 | $tar->extract(@af) or |
284 | $CPAN::Frontend->mydie("Could not untar with Archive::Tar."); |
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285 | } |
286 | |
287 | Mac::BuildTools::convert_files([$tar->list_files], 1) |
288 | if ($^O eq 'MacOS'); |
289 | |
290 | return 1; |
291 | } |
292 | } |
293 | |
294 | sub unzip { |
295 | my($self) = @_; |
296 | my $file = $self->{FILE}; |
297 | if ($CPAN::META->has_inst("Archive::Zip")) { |
298 | # blueprint of the code from Archive::Zip::Tree::extractTree(); |
299 | my $zip = Archive::Zip->new(); |
300 | my $status; |
301 | $status = $zip->read($file); |
302 | die "Read of file[$file] failed\n" if $status != Archive::Zip::AZ_OK(); |
303 | $CPAN::META->debug("Successfully read file[$file]") if $CPAN::DEBUG; |
304 | my @members = $zip->members(); |
305 | for my $member ( @members ) { |
306 | my $af = $member->fileName(); |
307 | if ($af =~ m!^(/|\.\./)!) { |
308 | $CPAN::Frontend->mydie("ALERT: Archive contains ". |
309 | "illegal member [$af]"); |
310 | } |
311 | $status = $member->extractToFileNamed( $af ); |
312 | $CPAN::META->debug("af[$af]status[$status]") if $CPAN::DEBUG; |
313 | die "Extracting of file[$af] from zipfile[$file] failed\n" if |
314 | $status != Archive::Zip::AZ_OK(); |
315 | return if $CPAN::Signal; |
316 | } |
317 | return 1; |
318 | } else { |
319 | my $unzip = $CPAN::Config->{unzip} or |
320 | $CPAN::Frontend->mydie("Cannot unzip, no unzip program available"); |
321 | my @system = ($unzip, $file); |
322 | return system(@system) == 0; |
323 | } |
324 | } |
325 | |
326 | 1; |
327 | |