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f716a1dd |
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. |
f716a1dd |
7 | |
8 | package File::Copy; |
9 | |
3b825e41 |
10 | use 5.006; |
71be2cbc |
11 | use strict; |
b395063c |
12 | use warnings; |
f716a1dd |
13 | use Carp; |
6c254d95 |
14 | use File::Spec; |
96a91e01 |
15 | use Config; |
17f410f9 |
16 | our(@ISA, @EXPORT, @EXPORT_OK, $VERSION, $Too_Big, $Syscopy_is_copy); |
17 | sub copy; |
18 | sub syscopy; |
19 | sub cp; |
20 | sub mv; |
71be2cbc |
21 | |
22 | # Note that this module implements only *part* of the API defined by |
23 | # the File/Copy.pm module of the File-Tools-2.0 package. However, that |
24 | # package has not yet been updated to work with Perl 5.004, and so it |
25 | # would be a Bad Thing for the CPAN module to grab it and replace this |
26 | # module. Therefore, we set this module's version higher than 2.0. |
88d01e8d |
27 | $VERSION = '2.05'; |
f716a1dd |
28 | |
71be2cbc |
29 | require Exporter; |
30 | @ISA = qw(Exporter); |
31 | @EXPORT = qw(copy move); |
32 | @EXPORT_OK = qw(cp mv); |
f716a1dd |
33 | |
441496b2 |
34 | $Too_Big = 1024 * 1024 * 2; |
f716a1dd |
35 | |
bcdb689b |
36 | my $macfiles; |
37 | if ($^O eq 'MacOS') { |
38 | $macfiles = eval { require Mac::MoreFiles }; |
39 | warn 'Mac::MoreFiles could not be loaded; using non-native syscopy' |
40 | if $^W; |
41 | } |
42 | |
6c254d95 |
43 | sub _catname { |
71be2cbc |
44 | my($from, $to) = @_; |
45 | if (not defined &basename) { |
46 | require File::Basename; |
47 | import File::Basename 'basename'; |
48 | } |
6c254d95 |
49 | |
50 | if ($^O eq 'MacOS') { |
51 | # a partial dir name that's valid only in the cwd (e.g. 'tmp') |
52 | $to = ':' . $to if $to !~ /:/; |
53 | } |
54 | |
55 | return File::Spec->catfile($to, basename($from)); |
f716a1dd |
56 | } |
57 | |
58 | sub copy { |
71be2cbc |
59 | croak("Usage: copy(FROM, TO [, BUFFERSIZE]) ") |
f716a1dd |
60 | unless(@_ == 2 || @_ == 3); |
61 | |
62 | my $from = shift; |
63 | my $to = shift; |
71be2cbc |
64 | |
65 | my $from_a_handle = (ref($from) |
66 | ? (ref($from) eq 'GLOB' |
d704f39a |
67 | || UNIVERSAL::isa($from, 'GLOB') |
68 | || UNIVERSAL::isa($from, 'IO::Handle')) |
71be2cbc |
69 | : (ref(\$from) eq 'GLOB')); |
70 | my $to_a_handle = (ref($to) |
71 | ? (ref($to) eq 'GLOB' |
d704f39a |
72 | || UNIVERSAL::isa($to, 'GLOB') |
73 | || UNIVERSAL::isa($to, 'IO::Handle')) |
71be2cbc |
74 | : (ref(\$to) eq 'GLOB')); |
75 | |
96a91e01 |
76 | if ($from eq $to) { # works for references, too |
77 | croak("'$from' and '$to' are identical (not copied)"); |
78 | } |
79 | |
80 | if ($Config{d_symlink} && $Config{d_readlink} && |
81 | !($^O eq 'Win32' || $^O eq 'os2' || $^O eq 'vms')) { |
5d3e98de |
82 | no warnings 'io'; # don't warn if -l on filehandle |
a93b80c9 |
83 | if ((-e $from && -l $from) || (-e $to && -l $to)) { |
96a91e01 |
84 | my @fs = stat($from); |
85 | my @ts = stat($to); |
a93b80c9 |
86 | if (@fs && @ts && $fs[0] == $ts[0] && $fs[1] == $ts[1]) { |
96a91e01 |
87 | croak("'$from' and '$to' are identical (not copied)"); |
88 | } |
89 | } |
90 | } |
91 | |
71be2cbc |
92 | if (!$from_a_handle && !$to_a_handle && -d $to && ! -d $from) { |
93 | $to = _catname($from, $to); |
94 | } |
95 | |
1a04d035 |
96 | if (defined &syscopy && !$Syscopy_is_copy |
e6434134 |
97 | && !$to_a_handle |
1d84e8df |
98 | && !($from_a_handle && $^O eq 'os2' ) # OS/2 cannot handle handles |
99 | && !($from_a_handle && $^O eq 'mpeix') # and neither can MPE/iX. |
7509b657 |
100 | && !($from_a_handle && $^O eq 'MSWin32') |
fa648be5 |
101 | && !($from_a_handle && $^O eq 'MacOS') |
2986a63f |
102 | && !($from_a_handle && $^O eq 'NetWare') |
1a04d035 |
103 | ) |
71be2cbc |
104 | { |
105 | return syscopy($from, $to); |
106 | } |
107 | |
108 | my $closefrom = 0; |
109 | my $closeto = 0; |
f716a1dd |
110 | my ($size, $status, $r, $buf); |
48a5c399 |
111 | local($\) = ''; |
f716a1dd |
112 | |
23ba2776 |
113 | my $from_h; |
71be2cbc |
114 | if ($from_a_handle) { |
23ba2776 |
115 | $from_h = $from; |
f716a1dd |
116 | } else { |
fa648be5 |
117 | $from = _protect($from) if $from =~ /^\s/s; |
23ba2776 |
118 | $from_h = \do { local *FH }; |
119 | open($from_h, "< $from\0") or goto fail_open1; |
120 | binmode $from_h or die "($!,$^E)"; |
f716a1dd |
121 | $closefrom = 1; |
1a04d035 |
122 | } |
123 | |
23ba2776 |
124 | my $to_h; |
71be2cbc |
125 | if ($to_a_handle) { |
23ba2776 |
126 | $to_h = $to; |
1a04d035 |
127 | } else { |
fa648be5 |
128 | $to = _protect($to) if $to =~ /^\s/s; |
23ba2776 |
129 | $to_h = \do { local *FH }; |
130 | open($to_h,"> $to\0") or goto fail_open2; |
131 | binmode $to_h or die "($!,$^E)"; |
71be2cbc |
132 | $closeto = 1; |
1a04d035 |
133 | } |
f716a1dd |
134 | |
135 | if (@_) { |
136 | $size = shift(@_) + 0; |
137 | croak("Bad buffer size for copy: $size\n") unless ($size > 0); |
138 | } else { |
025a6ea3 |
139 | $size = tied(*$from_h) ? 0 : -s $from_h || 0; |
f716a1dd |
140 | $size = 1024 if ($size < 512); |
441496b2 |
141 | $size = $Too_Big if ($size > $Too_Big); |
f716a1dd |
142 | } |
143 | |
71be2cbc |
144 | $! = 0; |
145 | for (;;) { |
146 | my ($r, $w, $t); |
23ba2776 |
147 | defined($r = sysread($from_h, $buf, $size)) |
71be2cbc |
148 | or goto fail_inner; |
149 | last unless $r; |
150 | for ($w = 0; $w < $r; $w += $t) { |
23ba2776 |
151 | $t = syswrite($to_h, $buf, $r - $w, $w) |
71be2cbc |
152 | or goto fail_inner; |
f716a1dd |
153 | } |
154 | } |
71be2cbc |
155 | |
23ba2776 |
156 | close($to_h) || goto fail_open2 if $closeto; |
157 | close($from_h) || goto fail_open1 if $closefrom; |
71be2cbc |
158 | |
48a5c399 |
159 | # Use this idiom to avoid uninitialized value warning. |
f716a1dd |
160 | return 1; |
1a04d035 |
161 | |
f716a1dd |
162 | # All of these contortions try to preserve error messages... |
163 | fail_inner: |
164 | if ($closeto) { |
165 | $status = $!; |
166 | $! = 0; |
23ba2776 |
167 | close $to_h; |
f716a1dd |
168 | $! = $status unless $!; |
169 | } |
170 | fail_open2: |
171 | if ($closefrom) { |
172 | $status = $!; |
173 | $! = 0; |
23ba2776 |
174 | close $from_h; |
f716a1dd |
175 | $! = $status unless $!; |
176 | } |
177 | fail_open1: |
f716a1dd |
178 | return 0; |
179 | } |
9b957b78 |
180 | |
441496b2 |
181 | sub move { |
71be2cbc |
182 | my($from,$to) = @_; |
183 | my($copied,$fromsz,$tosz1,$tomt1,$tosz2,$tomt2,$sts,$ossts); |
441496b2 |
184 | |
71be2cbc |
185 | if (-d $to && ! -d $from) { |
186 | $to = _catname($from, $to); |
187 | } |
188 | |
189 | ($tosz1,$tomt1) = (stat($to))[7,9]; |
190 | $fromsz = -s $from; |
e6434134 |
191 | if ($^O eq 'os2' and defined $tosz1 and defined $fromsz) { |
192 | # will not rename with overwrite |
193 | unlink $to; |
194 | } |
71be2cbc |
195 | return 1 if rename $from, $to; |
196 | |
197 | ($sts,$ossts) = ($! + 0, $^E + 0); |
198 | # Did rename return an error even though it succeeded, because $to |
199 | # is on a remote NFS file system, and NFS lost the server's ack? |
200 | return 1 if defined($fromsz) && !-e $from && # $from disappeared |
201 | (($tosz2,$tomt2) = (stat($to))[7,9]) && # $to's there |
202 | ($tosz1 != $tosz2 or $tomt1 != $tomt2) && # and changed |
203 | $tosz2 == $fromsz; # it's all there |
1a04d035 |
204 | |
71be2cbc |
205 | ($tosz1,$tomt1) = (stat($to))[7,9]; # just in case rename did something |
206 | return 1 if ($copied = copy($from,$to)) && unlink($from); |
1a04d035 |
207 | |
71be2cbc |
208 | ($tosz2,$tomt2) = ((stat($to))[7,9],0,0) if defined $tomt1; |
209 | unlink($to) if !defined($tomt1) or $tomt1 != $tomt2 or $tosz1 != $tosz2; |
210 | ($!,$^E) = ($sts,$ossts); |
211 | return 0; |
441496b2 |
212 | } |
9b957b78 |
213 | |
71be2cbc |
214 | *cp = \© |
215 | *mv = \&move; |
216 | |
fa648be5 |
217 | |
218 | if ($^O eq 'MacOS') { |
219 | *_protect = sub { MacPerl::MakeFSSpec($_[0]) }; |
220 | } else { |
221 | *_protect = sub { "./$_[0]" }; |
222 | } |
223 | |
9b957b78 |
224 | # &syscopy is an XSUB under OS/2 |
1d84e8df |
225 | unless (defined &syscopy) { |
226 | if ($^O eq 'VMS') { |
227 | *syscopy = \&rmscopy; |
228 | } elsif ($^O eq 'mpeix') { |
229 | *syscopy = sub { |
3f5ee302 |
230 | return 0 unless @_ == 2; |
1d84e8df |
231 | # Use the MPE cp program in order to |
232 | # preserve MPE file attributes. |
233 | return system('/bin/cp', '-f', $_[0], $_[1]) == 0; |
234 | }; |
7509b657 |
235 | } elsif ($^O eq 'MSWin32') { |
236 | *syscopy = sub { |
237 | return 0 unless @_ == 2; |
238 | return Win32::CopyFile(@_, 1); |
239 | }; |
bcdb689b |
240 | } elsif ($macfiles) { |
fa648be5 |
241 | *syscopy = sub { |
242 | my($from, $to) = @_; |
243 | my($dir, $toname); |
244 | |
245 | return 0 unless -e $from; |
246 | |
247 | if ($to =~ /(.*:)([^:]+):?$/) { |
248 | ($dir, $toname) = ($1, $2); |
249 | } else { |
250 | ($dir, $toname) = (":", $to); |
251 | } |
252 | |
253 | unlink($to); |
254 | Mac::MoreFiles::FSpFileCopy($from, $dir, $toname, 1); |
255 | }; |
1d84e8df |
256 | } else { |
1a04d035 |
257 | $Syscopy_is_copy = 1; |
1d84e8df |
258 | *syscopy = \© |
259 | } |
260 | } |
f716a1dd |
261 | |
262 | 1; |
263 | |
264 | __END__ |
a5f75d66 |
265 | |
f716a1dd |
266 | =head1 NAME |
267 | |
268 | File::Copy - Copy files or filehandles |
269 | |
a5f75d66 |
270 | =head1 SYNOPSIS |
f716a1dd |
271 | |
272 | use File::Copy; |
273 | |
274 | copy("file1","file2"); |
275 | copy("Copy.pm",\*STDOUT);' |
441496b2 |
276 | move("/dev1/fileA","/dev2/fileB"); |
f716a1dd |
277 | |
278 | use POSIX; |
279 | use File::Copy cp; |
280 | |
23f3aea0 |
281 | $n = FileHandle->new("/a/file","r"); |
f716a1dd |
282 | cp($n,"x");' |
283 | |
284 | =head1 DESCRIPTION |
285 | |
441496b2 |
286 | The File::Copy module provides two basic functions, C<copy> and |
287 | C<move>, which are useful for getting the contents of a file from |
288 | one place to another. |
289 | |
290 | =over 4 |
291 | |
292 | =item * |
293 | |
294 | The C<copy> function takes two |
f716a1dd |
295 | parameters: a file to copy from and a file to copy to. Either |
296 | argument may be a string, a FileHandle reference or a FileHandle |
297 | glob. Obviously, if the first argument is a filehandle of some |
298 | sort, it will be read from, and if it is a file I<name> it will |
299 | be opened for reading. Likewise, the second argument will be |
96a91e01 |
300 | written to (and created if need be). Trying to copy a file on top |
301 | of itself is a fatal error. |
71be2cbc |
302 | |
303 | B<Note that passing in |
9b957b78 |
304 | files as handles instead of names may lead to loss of information |
305 | on some operating systems; it is recommended that you use file |
e6434134 |
306 | names whenever possible.> Files are opened in binary mode where |
8dcee03e |
307 | applicable. To get a consistent behaviour when copying from a |
e6434134 |
308 | filehandle to a file, use C<binmode> on the filehandle. |
f716a1dd |
309 | |
310 | An optional third parameter can be used to specify the buffer |
311 | size used for copying. This is the number of bytes from the |
312 | first file, that wil be held in memory at any given time, before |
313 | being written to the second file. The default buffer size depends |
314 | upon the file, but will generally be the whole file (up to 2Mb), or |
315 | 1k for filehandles that do not reference files (eg. sockets). |
316 | |
317 | You may use the syntax C<use File::Copy "cp"> to get at the |
318 | "cp" alias for this function. The syntax is I<exactly> the same. |
319 | |
441496b2 |
320 | =item * |
321 | |
322 | The C<move> function also takes two parameters: the current name |
71be2cbc |
323 | and the intended name of the file to be moved. If the destination |
324 | already exists and is a directory, and the source is not a |
325 | directory, then the source file will be renamed into the directory |
326 | specified by the destination. |
327 | |
328 | If possible, move() will simply rename the file. Otherwise, it copies |
329 | the file to the new location and deletes the original. If an error occurs |
330 | during this copy-and-delete process, you may be left with a (possibly partial) |
441496b2 |
331 | copy of the file under the destination name. |
332 | |
333 | You may use the "mv" alias for this function in the same way that |
334 | you may use the "cp" alias for C<copy>. |
335 | |
336 | =back |
337 | |
9b957b78 |
338 | File::Copy also provides the C<syscopy> routine, which copies the |
339 | file specified in the first parameter to the file specified in the |
340 | second parameter, preserving OS-specific attributes and file |
341 | structure. For Unix systems, this is equivalent to the simple |
f1442e8b |
342 | C<copy> routine, which doesn't preserve OS-specific attributes. For |
343 | VMS systems, this calls the C<rmscopy> routine (see below). For OS/2 |
344 | systems, this calls the C<syscopy> XSUB directly. For Win32 systems, |
345 | this calls C<Win32::CopyFile>. |
9b957b78 |
346 | |
bcdb689b |
347 | On Mac OS (Classic), C<syscopy> calls C<Mac::MoreFiles::FSpFileCopy>, |
348 | if available. |
349 | |
7509b657 |
350 | =head2 Special behaviour if C<syscopy> is defined (OS/2, VMS and Win32) |
9b957b78 |
351 | |
71be2cbc |
352 | If both arguments to C<copy> are not file handles, |
353 | then C<copy> will perform a "system copy" of |
9b957b78 |
354 | the input file to a new output file, in order to preserve file |
355 | attributes, indexed file structure, I<etc.> The buffer size |
71be2cbc |
356 | parameter is ignored. If either argument to C<copy> is a |
357 | handle to an opened file, then data is copied using Perl |
9b957b78 |
358 | operators, and no effort is made to preserve file attributes |
359 | or record structure. |
360 | |
55497cff |
361 | The system copy routine may also be called directly under VMS and OS/2 |
362 | as C<File::Copy::syscopy> (or under VMS as C<File::Copy::rmscopy>, which |
71be2cbc |
363 | is the routine that does the actual work for syscopy). |
9b957b78 |
364 | |
441496b2 |
365 | =over 4 |
55497cff |
366 | |
9b957b78 |
367 | =item rmscopy($from,$to[,$date_flag]) |
368 | |
71be2cbc |
369 | The first and second arguments may be strings, typeglobs, typeglob |
370 | references, or objects inheriting from IO::Handle; |
371 | they are used in all cases to obtain the |
9b957b78 |
372 | I<filespec> of the input and output files, respectively. The |
373 | name and type of the input file are used as defaults for the |
374 | output file, if necessary. |
375 | |
376 | A new version of the output file is always created, which |
377 | inherits the structure and RMS attributes of the input file, |
378 | except for owner and protections (and possibly timestamps; |
379 | see below). All data from the input file is copied to the |
380 | output file; if either of the first two parameters to C<rmscopy> |
381 | is a file handle, its position is unchanged. (Note that this |
382 | means a file handle pointing to the output file will be |
383 | associated with an old version of that file after C<rmscopy> |
384 | returns, not the newly created version.) |
385 | |
386 | The third parameter is an integer flag, which tells C<rmscopy> |
1fef88e7 |
387 | how to handle timestamps. If it is E<lt> 0, none of the input file's |
388 | timestamps are propagated to the output file. If it is E<gt> 0, then |
9b957b78 |
389 | it is interpreted as a bitmask: if bit 0 (the LSB) is set, then |
390 | timestamps other than the revision date are propagated; if bit 1 |
391 | is set, the revision date is propagated. If the third parameter |
392 | to C<rmscopy> is 0, then it behaves much like the DCL COPY command: |
393 | if the name or type of the output file was explicitly specified, |
394 | then no timestamps are propagated, but if they were taken implicitly |
395 | from the input filespec, then all timestamps other than the |
396 | revision date are propagated. If this parameter is not supplied, |
397 | it defaults to 0. |
398 | |
399 | Like C<copy>, C<rmscopy> returns 1 on success. If an error occurs, |
400 | it sets C<$!>, deletes the output file, and returns 0. |
401 | |
55497cff |
402 | =back |
403 | |
f716a1dd |
404 | =head1 RETURN |
405 | |
441496b2 |
406 | All functions return 1 on success, 0 on failure. |
407 | $! will be set if an error was encountered. |
f716a1dd |
408 | |
6c254d95 |
409 | =head1 NOTES |
410 | |
411 | =over 4 |
412 | |
413 | =item * |
414 | |
415 | On Mac OS (Classic), the path separator is ':', not '/', and the |
416 | current directory is denoted as ':', not '.'. You should be careful |
417 | about specifying relative pathnames. While a full path always begins |
418 | with a volume name, a relative pathname should always begin with a |
419 | ':'. If specifying a volume name only, a trailing ':' is required. |
420 | |
421 | E.g. |
422 | |
423 | copy("file1", "tmp"); # creates the file 'tmp' in the current directory |
424 | copy("file1", ":tmp:"); # creates :tmp:file1 |
425 | copy("file1", ":tmp"); # same as above |
426 | copy("file1", "tmp"); # same as above, if 'tmp' is a directory (but don't do |
427 | # that, since it may cause confusion, see example #1) |
428 | copy("file1", "tmp:file1"); # error, since 'tmp:' is not a volume |
429 | copy("file1", ":tmp:file1"); # ok, partial path |
430 | copy("file1", "DataHD:"); # creates DataHD:file1 |
431 | |
432 | move("MacintoshHD:fileA", "DataHD:fileB"); # moves (don't copies) files from one |
433 | # volume to another |
434 | |
435 | =back |
436 | |
f716a1dd |
437 | =head1 AUTHOR |
438 | |
441496b2 |
439 | File::Copy was written by Aaron Sherman I<E<lt>ajs@ajs.comE<gt>> in 1995, |
bd3fa61c |
440 | and updated by Charles Bailey I<E<lt>bailey@newman.upenn.eduE<gt>> in 1996. |
f716a1dd |
441 | |
442 | =cut |
441496b2 |
443 | |