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1 | # File/Copy.pm. Written in 1994 by Aaron Sherman <ajs@ajs.com>. This |
2 | # source code has been placed in the public domain by the author. |
3 | # Please be kind and preserve the documentation. |
4 | # |
71be2cbc |
5 | # Additions copyright 1996 by Charles Bailey. Permission is granted |
6 | # to distribute the revised code under the same terms as Perl itself. |
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7 | |
8 | package File::Copy; |
9 | |
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10 | use 5.6.0; |
71be2cbc |
11 | use strict; |
b395063c |
12 | use warnings; |
f716a1dd |
13 | use Carp; |
6c254d95 |
14 | use File::Spec; |
17f410f9 |
15 | our(@ISA, @EXPORT, @EXPORT_OK, $VERSION, $Too_Big, $Syscopy_is_copy); |
16 | sub copy; |
17 | sub syscopy; |
18 | sub cp; |
19 | sub mv; |
71be2cbc |
20 | |
21 | # Note that this module implements only *part* of the API defined by |
22 | # the File/Copy.pm module of the File-Tools-2.0 package. However, that |
23 | # package has not yet been updated to work with Perl 5.004, and so it |
24 | # would be a Bad Thing for the CPAN module to grab it and replace this |
25 | # module. Therefore, we set this module's version higher than 2.0. |
6c254d95 |
26 | $VERSION = '2.04'; |
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27 | |
71be2cbc |
28 | require Exporter; |
29 | @ISA = qw(Exporter); |
30 | @EXPORT = qw(copy move); |
31 | @EXPORT_OK = qw(cp mv); |
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32 | |
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33 | $Too_Big = 1024 * 1024 * 2; |
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34 | |
6c254d95 |
35 | sub _catname { |
71be2cbc |
36 | my($from, $to) = @_; |
37 | if (not defined &basename) { |
38 | require File::Basename; |
39 | import File::Basename 'basename'; |
40 | } |
6c254d95 |
41 | |
42 | if ($^O eq 'MacOS') { |
43 | # a partial dir name that's valid only in the cwd (e.g. 'tmp') |
44 | $to = ':' . $to if $to !~ /:/; |
45 | } |
46 | |
47 | return File::Spec->catfile($to, basename($from)); |
f716a1dd |
48 | } |
49 | |
50 | sub copy { |
71be2cbc |
51 | croak("Usage: copy(FROM, TO [, BUFFERSIZE]) ") |
f716a1dd |
52 | unless(@_ == 2 || @_ == 3); |
53 | |
54 | my $from = shift; |
55 | my $to = shift; |
71be2cbc |
56 | |
57 | my $from_a_handle = (ref($from) |
58 | ? (ref($from) eq 'GLOB' |
d704f39a |
59 | || UNIVERSAL::isa($from, 'GLOB') |
60 | || UNIVERSAL::isa($from, 'IO::Handle')) |
71be2cbc |
61 | : (ref(\$from) eq 'GLOB')); |
62 | my $to_a_handle = (ref($to) |
63 | ? (ref($to) eq 'GLOB' |
d704f39a |
64 | || UNIVERSAL::isa($to, 'GLOB') |
65 | || UNIVERSAL::isa($to, 'IO::Handle')) |
71be2cbc |
66 | : (ref(\$to) eq 'GLOB')); |
67 | |
68 | if (!$from_a_handle && !$to_a_handle && -d $to && ! -d $from) { |
69 | $to = _catname($from, $to); |
70 | } |
71 | |
1a04d035 |
72 | if (defined &syscopy && !$Syscopy_is_copy |
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73 | && !$to_a_handle |
1d84e8df |
74 | && !($from_a_handle && $^O eq 'os2' ) # OS/2 cannot handle handles |
75 | && !($from_a_handle && $^O eq 'mpeix') # and neither can MPE/iX. |
7509b657 |
76 | && !($from_a_handle && $^O eq 'MSWin32') |
fa648be5 |
77 | && !($from_a_handle && $^O eq 'MacOS') |
2986a63f |
78 | && !($from_a_handle && $^O eq 'NetWare') |
1a04d035 |
79 | ) |
71be2cbc |
80 | { |
81 | return syscopy($from, $to); |
82 | } |
83 | |
84 | my $closefrom = 0; |
85 | my $closeto = 0; |
f716a1dd |
86 | my ($size, $status, $r, $buf); |
87 | local(*FROM, *TO); |
48a5c399 |
88 | local($\) = ''; |
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89 | |
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90 | if ($from_a_handle) { |
91 | *FROM = *$from{FILEHANDLE}; |
f716a1dd |
92 | } else { |
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93 | $from = _protect($from) if $from =~ /^\s/s; |
71be2cbc |
94 | open(FROM, "< $from\0") or goto fail_open1; |
95 | binmode FROM or die "($!,$^E)"; |
f716a1dd |
96 | $closefrom = 1; |
1a04d035 |
97 | } |
98 | |
71be2cbc |
99 | if ($to_a_handle) { |
100 | *TO = *$to{FILEHANDLE}; |
1a04d035 |
101 | } else { |
fa648be5 |
102 | $to = _protect($to) if $to =~ /^\s/s; |
71be2cbc |
103 | open(TO,"> $to\0") or goto fail_open2; |
104 | binmode TO or die "($!,$^E)"; |
105 | $closeto = 1; |
1a04d035 |
106 | } |
f716a1dd |
107 | |
108 | if (@_) { |
109 | $size = shift(@_) + 0; |
110 | croak("Bad buffer size for copy: $size\n") unless ($size > 0); |
111 | } else { |
112 | $size = -s FROM; |
113 | $size = 1024 if ($size < 512); |
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114 | $size = $Too_Big if ($size > $Too_Big); |
f716a1dd |
115 | } |
116 | |
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117 | $! = 0; |
118 | for (;;) { |
119 | my ($r, $w, $t); |
120 | defined($r = sysread(FROM, $buf, $size)) |
121 | or goto fail_inner; |
122 | last unless $r; |
123 | for ($w = 0; $w < $r; $w += $t) { |
124 | $t = syswrite(TO, $buf, $r - $w, $w) |
125 | or goto fail_inner; |
f716a1dd |
126 | } |
127 | } |
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128 | |
f716a1dd |
129 | close(TO) || goto fail_open2 if $closeto; |
130 | close(FROM) || goto fail_open1 if $closefrom; |
71be2cbc |
131 | |
48a5c399 |
132 | # Use this idiom to avoid uninitialized value warning. |
f716a1dd |
133 | return 1; |
1a04d035 |
134 | |
f716a1dd |
135 | # All of these contortions try to preserve error messages... |
136 | fail_inner: |
137 | if ($closeto) { |
138 | $status = $!; |
139 | $! = 0; |
140 | close TO; |
141 | $! = $status unless $!; |
142 | } |
143 | fail_open2: |
144 | if ($closefrom) { |
145 | $status = $!; |
146 | $! = 0; |
147 | close FROM; |
148 | $! = $status unless $!; |
149 | } |
150 | fail_open1: |
f716a1dd |
151 | return 0; |
152 | } |
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153 | |
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154 | sub move { |
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155 | my($from,$to) = @_; |
156 | my($copied,$fromsz,$tosz1,$tomt1,$tosz2,$tomt2,$sts,$ossts); |
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157 | |
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158 | if (-d $to && ! -d $from) { |
159 | $to = _catname($from, $to); |
160 | } |
161 | |
162 | ($tosz1,$tomt1) = (stat($to))[7,9]; |
163 | $fromsz = -s $from; |
e6434134 |
164 | if ($^O eq 'os2' and defined $tosz1 and defined $fromsz) { |
165 | # will not rename with overwrite |
166 | unlink $to; |
167 | } |
71be2cbc |
168 | return 1 if rename $from, $to; |
169 | |
170 | ($sts,$ossts) = ($! + 0, $^E + 0); |
171 | # Did rename return an error even though it succeeded, because $to |
172 | # is on a remote NFS file system, and NFS lost the server's ack? |
173 | return 1 if defined($fromsz) && !-e $from && # $from disappeared |
174 | (($tosz2,$tomt2) = (stat($to))[7,9]) && # $to's there |
175 | ($tosz1 != $tosz2 or $tomt1 != $tomt2) && # and changed |
176 | $tosz2 == $fromsz; # it's all there |
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177 | |
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178 | ($tosz1,$tomt1) = (stat($to))[7,9]; # just in case rename did something |
179 | return 1 if ($copied = copy($from,$to)) && unlink($from); |
1a04d035 |
180 | |
71be2cbc |
181 | ($tosz2,$tomt2) = ((stat($to))[7,9],0,0) if defined $tomt1; |
182 | unlink($to) if !defined($tomt1) or $tomt1 != $tomt2 or $tosz1 != $tosz2; |
183 | ($!,$^E) = ($sts,$ossts); |
184 | return 0; |
441496b2 |
185 | } |
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186 | |
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187 | *cp = \© |
188 | *mv = \&move; |
189 | |
fa648be5 |
190 | |
191 | if ($^O eq 'MacOS') { |
192 | *_protect = sub { MacPerl::MakeFSSpec($_[0]) }; |
193 | } else { |
194 | *_protect = sub { "./$_[0]" }; |
195 | } |
196 | |
9b957b78 |
197 | # &syscopy is an XSUB under OS/2 |
1d84e8df |
198 | unless (defined &syscopy) { |
199 | if ($^O eq 'VMS') { |
200 | *syscopy = \&rmscopy; |
201 | } elsif ($^O eq 'mpeix') { |
202 | *syscopy = sub { |
3f5ee302 |
203 | return 0 unless @_ == 2; |
1d84e8df |
204 | # Use the MPE cp program in order to |
205 | # preserve MPE file attributes. |
206 | return system('/bin/cp', '-f', $_[0], $_[1]) == 0; |
207 | }; |
7509b657 |
208 | } elsif ($^O eq 'MSWin32') { |
209 | *syscopy = sub { |
210 | return 0 unless @_ == 2; |
211 | return Win32::CopyFile(@_, 1); |
212 | }; |
fa648be5 |
213 | } elsif ($^O eq 'MacOS') { |
214 | require Mac::MoreFiles; |
215 | *syscopy = sub { |
216 | my($from, $to) = @_; |
217 | my($dir, $toname); |
218 | |
219 | return 0 unless -e $from; |
220 | |
221 | if ($to =~ /(.*:)([^:]+):?$/) { |
222 | ($dir, $toname) = ($1, $2); |
223 | } else { |
224 | ($dir, $toname) = (":", $to); |
225 | } |
226 | |
227 | unlink($to); |
228 | Mac::MoreFiles::FSpFileCopy($from, $dir, $toname, 1); |
229 | }; |
1d84e8df |
230 | } else { |
1a04d035 |
231 | $Syscopy_is_copy = 1; |
1d84e8df |
232 | *syscopy = \© |
233 | } |
234 | } |
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235 | |
236 | 1; |
237 | |
238 | __END__ |
a5f75d66 |
239 | |
f716a1dd |
240 | =head1 NAME |
241 | |
242 | File::Copy - Copy files or filehandles |
243 | |
a5f75d66 |
244 | =head1 SYNOPSIS |
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245 | |
246 | use File::Copy; |
247 | |
248 | copy("file1","file2"); |
249 | copy("Copy.pm",\*STDOUT);' |
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250 | move("/dev1/fileA","/dev2/fileB"); |
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251 | |
252 | use POSIX; |
253 | use File::Copy cp; |
254 | |
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255 | $n = FileHandle->new("/a/file","r"); |
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256 | cp($n,"x");' |
257 | |
258 | =head1 DESCRIPTION |
259 | |
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260 | The File::Copy module provides two basic functions, C<copy> and |
261 | C<move>, which are useful for getting the contents of a file from |
262 | one place to another. |
263 | |
264 | =over 4 |
265 | |
266 | =item * |
267 | |
268 | The C<copy> function takes two |
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269 | parameters: a file to copy from and a file to copy to. Either |
270 | argument may be a string, a FileHandle reference or a FileHandle |
271 | glob. Obviously, if the first argument is a filehandle of some |
272 | sort, it will be read from, and if it is a file I<name> it will |
273 | be opened for reading. Likewise, the second argument will be |
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274 | written to (and created if need be). |
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275 | |
276 | B<Note that passing in |
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277 | files as handles instead of names may lead to loss of information |
278 | on some operating systems; it is recommended that you use file |
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279 | names whenever possible.> Files are opened in binary mode where |
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280 | applicable. To get a consistent behaviour when copying from a |
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281 | filehandle to a file, use C<binmode> on the filehandle. |
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282 | |
283 | An optional third parameter can be used to specify the buffer |
284 | size used for copying. This is the number of bytes from the |
285 | first file, that wil be held in memory at any given time, before |
286 | being written to the second file. The default buffer size depends |
287 | upon the file, but will generally be the whole file (up to 2Mb), or |
288 | 1k for filehandles that do not reference files (eg. sockets). |
289 | |
290 | You may use the syntax C<use File::Copy "cp"> to get at the |
291 | "cp" alias for this function. The syntax is I<exactly> the same. |
292 | |
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293 | =item * |
294 | |
295 | The C<move> function also takes two parameters: the current name |
71be2cbc |
296 | and the intended name of the file to be moved. If the destination |
297 | already exists and is a directory, and the source is not a |
298 | directory, then the source file will be renamed into the directory |
299 | specified by the destination. |
300 | |
301 | If possible, move() will simply rename the file. Otherwise, it copies |
302 | the file to the new location and deletes the original. If an error occurs |
303 | during this copy-and-delete process, you may be left with a (possibly partial) |
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304 | copy of the file under the destination name. |
305 | |
306 | You may use the "mv" alias for this function in the same way that |
307 | you may use the "cp" alias for C<copy>. |
308 | |
309 | =back |
310 | |
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311 | File::Copy also provides the C<syscopy> routine, which copies the |
312 | file specified in the first parameter to the file specified in the |
313 | second parameter, preserving OS-specific attributes and file |
314 | structure. For Unix systems, this is equivalent to the simple |
315 | C<copy> routine. For VMS systems, this calls the C<rmscopy> |
316 | routine (see below). For OS/2 systems, this calls the C<syscopy> |
7509b657 |
317 | XSUB directly. For Win32 systems, this calls C<Win32::CopyFile>. |
9b957b78 |
318 | |
7509b657 |
319 | =head2 Special behaviour if C<syscopy> is defined (OS/2, VMS and Win32) |
9b957b78 |
320 | |
71be2cbc |
321 | If both arguments to C<copy> are not file handles, |
322 | then C<copy> will perform a "system copy" of |
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323 | the input file to a new output file, in order to preserve file |
324 | attributes, indexed file structure, I<etc.> The buffer size |
71be2cbc |
325 | parameter is ignored. If either argument to C<copy> is a |
326 | handle to an opened file, then data is copied using Perl |
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327 | operators, and no effort is made to preserve file attributes |
328 | or record structure. |
329 | |
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330 | The system copy routine may also be called directly under VMS and OS/2 |
331 | as C<File::Copy::syscopy> (or under VMS as C<File::Copy::rmscopy>, which |
71be2cbc |
332 | is the routine that does the actual work for syscopy). |
9b957b78 |
333 | |
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334 | =over 4 |
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335 | |
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336 | =item rmscopy($from,$to[,$date_flag]) |
337 | |
71be2cbc |
338 | The first and second arguments may be strings, typeglobs, typeglob |
339 | references, or objects inheriting from IO::Handle; |
340 | they are used in all cases to obtain the |
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341 | I<filespec> of the input and output files, respectively. The |
342 | name and type of the input file are used as defaults for the |
343 | output file, if necessary. |
344 | |
345 | A new version of the output file is always created, which |
346 | inherits the structure and RMS attributes of the input file, |
347 | except for owner and protections (and possibly timestamps; |
348 | see below). All data from the input file is copied to the |
349 | output file; if either of the first two parameters to C<rmscopy> |
350 | is a file handle, its position is unchanged. (Note that this |
351 | means a file handle pointing to the output file will be |
352 | associated with an old version of that file after C<rmscopy> |
353 | returns, not the newly created version.) |
354 | |
355 | The third parameter is an integer flag, which tells C<rmscopy> |
1fef88e7 |
356 | how to handle timestamps. If it is E<lt> 0, none of the input file's |
357 | timestamps are propagated to the output file. If it is E<gt> 0, then |
9b957b78 |
358 | it is interpreted as a bitmask: if bit 0 (the LSB) is set, then |
359 | timestamps other than the revision date are propagated; if bit 1 |
360 | is set, the revision date is propagated. If the third parameter |
361 | to C<rmscopy> is 0, then it behaves much like the DCL COPY command: |
362 | if the name or type of the output file was explicitly specified, |
363 | then no timestamps are propagated, but if they were taken implicitly |
364 | from the input filespec, then all timestamps other than the |
365 | revision date are propagated. If this parameter is not supplied, |
366 | it defaults to 0. |
367 | |
368 | Like C<copy>, C<rmscopy> returns 1 on success. If an error occurs, |
369 | it sets C<$!>, deletes the output file, and returns 0. |
370 | |
55497cff |
371 | =back |
372 | |
f716a1dd |
373 | =head1 RETURN |
374 | |
441496b2 |
375 | All functions return 1 on success, 0 on failure. |
376 | $! will be set if an error was encountered. |
f716a1dd |
377 | |
6c254d95 |
378 | =head1 NOTES |
379 | |
380 | =over 4 |
381 | |
382 | =item * |
383 | |
384 | On Mac OS (Classic), the path separator is ':', not '/', and the |
385 | current directory is denoted as ':', not '.'. You should be careful |
386 | about specifying relative pathnames. While a full path always begins |
387 | with a volume name, a relative pathname should always begin with a |
388 | ':'. If specifying a volume name only, a trailing ':' is required. |
389 | |
390 | E.g. |
391 | |
392 | copy("file1", "tmp"); # creates the file 'tmp' in the current directory |
393 | copy("file1", ":tmp:"); # creates :tmp:file1 |
394 | copy("file1", ":tmp"); # same as above |
395 | copy("file1", "tmp"); # same as above, if 'tmp' is a directory (but don't do |
396 | # that, since it may cause confusion, see example #1) |
397 | copy("file1", "tmp:file1"); # error, since 'tmp:' is not a volume |
398 | copy("file1", ":tmp:file1"); # ok, partial path |
399 | copy("file1", "DataHD:"); # creates DataHD:file1 |
400 | |
401 | move("MacintoshHD:fileA", "DataHD:fileB"); # moves (don't copies) files from one |
402 | # volume to another |
403 | |
404 | =back |
405 | |
f716a1dd |
406 | =head1 AUTHOR |
407 | |
441496b2 |
408 | File::Copy was written by Aaron Sherman I<E<lt>ajs@ajs.comE<gt>> in 1995, |
bd3fa61c |
409 | and updated by Charles Bailey I<E<lt>bailey@newman.upenn.eduE<gt>> in 1996. |
f716a1dd |
410 | |
411 | =cut |
441496b2 |
412 | |