package File::Copy;
-use 5.6.0;
+use 5.006;
use strict;
use warnings;
use Carp;
use File::Spec;
+use Config;
our(@ISA, @EXPORT, @EXPORT_OK, $VERSION, $Too_Big, $Syscopy_is_copy);
sub copy;
sub syscopy;
# package has not yet been updated to work with Perl 5.004, and so it
# would be a Bad Thing for the CPAN module to grab it and replace this
# module. Therefore, we set this module's version higher than 2.0.
-$VERSION = '2.04';
+$VERSION = '2.05';
require Exporter;
@ISA = qw(Exporter);
|| UNIVERSAL::isa($to, 'IO::Handle'))
: (ref(\$to) eq 'GLOB'));
+ if ($from eq $to) { # works for references, too
+ croak("'$from' and '$to' are identical (not copied)");
+ }
+
+ if ($Config{d_symlink} && $Config{d_readlink} &&
+ !($^O eq 'Win32' || $^O eq 'os2' || $^O eq 'vms')) {
+ no warnings 'io'; # don't warn if -l on filehandle
+ if ((-e $from && -l $from) || (-e $to && -l $to)) {
+ my @fs = stat($from);
+ my @ts = stat($to);
+ if (@fs && @ts && $fs[0] == $ts[0] && $fs[1] == $ts[1]) {
+ croak("'$from' and '$to' are identical (not copied)");
+ }
+ }
+ }
+
if (!$from_a_handle && !$to_a_handle && -d $to && ! -d $from) {
$to = _catname($from, $to);
}
$size = shift(@_) + 0;
croak("Bad buffer size for copy: $size\n") unless ($size > 0);
} else {
- no warnings 'uninitialized';
- $size = -s $from_h;
+ $size = tied(*$from_h) ? 0 : -s $from_h || 0;
$size = 1024 if ($size < 512);
$size = $Too_Big if ($size > $Too_Big);
}
glob. Obviously, if the first argument is a filehandle of some
sort, it will be read from, and if it is a file I<name> it will
be opened for reading. Likewise, the second argument will be
-written to (and created if need be).
+written to (and created if need be). Trying to copy a file on top
+of itself is a fatal error.
B<Note that passing in
files as handles instead of names may lead to loss of information