# source code has been placed in the public domain by the author.
# Please be kind and preserve the documentation.
#
+# Additions copyright 1996 by Charles Bailey. Permission is granted
+# to distribute the revised code under the same terms as Perl itself.
package File::Copy;
-require Exporter;
+use strict;
use Carp;
+use vars qw(@ISA @EXPORT @EXPORT_OK $VERSION $Too_Big
+ © &syscopy &cp &mv);
+
+# Note that this module implements only *part* of the API defined by
+# the File/Copy.pm module of the File-Tools-2.0 package. However, that
+# package has not yet been updated to work with Perl 5.004, and so it
+# would be a Bad Thing for the CPAN module to grab it and replace this
+# module. Therefore, we set this module's version higher than 2.0.
+$VERSION = '2.02';
-@ISA=qw(Exporter);
-@EXPORT=qw(copy);
-@EXPORT_OK=qw(copy cp);
+require Exporter;
+@ISA = qw(Exporter);
+@EXPORT = qw(copy move);
+@EXPORT_OK = qw(cp mv);
-$File::Copy::VERSION = '1.5';
-$File::Copy::Too_Big = 1024 * 1024 * 2;
+$Too_Big = 1024 * 1024 * 2;
-sub VERSION {
- # Version of File::Copy
- return $File::Copy::VERSION;
+sub _catname { # Will be replaced by File::Spec when it arrives
+ my($from, $to) = @_;
+ if (not defined &basename) {
+ require File::Basename;
+ import File::Basename 'basename';
+ }
+ if ($^O eq 'VMS') { $to = VMS::Filespec::vmspath($to) . basename($from); }
+ elsif ($^O eq 'MacOS') { $to .= ':' . basename($from); }
+ elsif ($to =~ m|\\|) { $to .= '\\' . basename($from); }
+ else { $to .= '/' . basename($from); }
}
sub copy {
- croak("Usage: copy( file1, file2 [, buffersize]) ")
+ croak("Usage: copy(FROM, TO [, BUFFERSIZE]) ")
unless(@_ == 2 || @_ == 3);
- # VMS: perform RMS copy to preserve file attributes, indices, etc.
- # This function is always defined under VMS, even in miniperl
- if (defined(&File::Copy::rmscopy)) { return File::Copy::rmscopy($_[0],$_[1]) }
-
my $from = shift;
my $to = shift;
- my $recsep = $\;
- my $closefrom=0;
- my $closeto=0;
- my ($size, $status, $r, $buf);
- local(*FROM, *TO);
- $\ = '';
+ my $from_a_handle = (ref($from)
+ ? (ref($from) eq 'GLOB'
+ || UNIVERSAL::isa($from, 'GLOB')
+ || UNIVERSAL::isa($from, 'IO::Handle'))
+ : (ref(\$from) eq 'GLOB'));
+ my $to_a_handle = (ref($to)
+ ? (ref($to) eq 'GLOB'
+ || UNIVERSAL::isa($to, 'GLOB')
+ || UNIVERSAL::isa($to, 'IO::Handle'))
+ : (ref(\$to) eq 'GLOB'));
+
+ if (!$from_a_handle && !$to_a_handle && -d $to && ! -d $from) {
+ $to = _catname($from, $to);
+ }
- if (ref(\$from) eq 'GLOB') {
- *FROM = $from;
- } elsif (defined ref $from and
- (ref($from) eq 'GLOB' || ref($from) eq 'FileHandle')) {
- *FROM = *$from;
- } else {
- open(FROM,"<$from")||goto(fail_open1);
- $closefrom = 1;
+ if (defined &syscopy && \&syscopy != \©
+ && !$to_a_handle
+ && !($from_a_handle && $^O eq 'os2' ) # OS/2 cannot handle handles
+ && !($from_a_handle && $^O eq 'mpeix') # and neither can MPE/iX.
+ )
+ {
+ return syscopy($from, $to);
}
- if (ref(\$to) eq 'GLOB') {
- *TO = $to;
- } elsif (defined ref $to and
- (ref($to) eq 'GLOB' || ref($to) eq 'FileHandle')) {
- *TO = *$to;
+ my $closefrom = 0;
+ my $closeto = 0;
+ my ($size, $status, $r, $buf);
+ local(*FROM, *TO);
+ local($\) = '';
+
+ if ($from_a_handle) {
+ *FROM = *$from{FILEHANDLE};
} else {
- open(TO,">$to")||goto(fail_open2);
- $closeto=1;
- }
+ $from = "./$from" if $from =~ /^\s/;
+ open(FROM, "< $from\0") or goto fail_open1;
+ binmode FROM or die "($!,$^E)";
+ $closefrom = 1;
+ }
+
+ if ($to_a_handle) {
+ *TO = *$to{FILEHANDLE};
+ } else {
+ $to = "./$to" if $to =~ /^\s/;
+ open(TO,"> $to\0") or goto fail_open2;
+ binmode TO or die "($!,$^E)";
+ $closeto = 1;
+ }
if (@_) {
$size = shift(@_) + 0;
} else {
$size = -s FROM;
$size = 1024 if ($size < 512);
- $size = $File::Copy::Too_Big if ($size > $File::Copy::Too_Big);
+ $size = $Too_Big if ($size > $Too_Big);
}
- $buf = '';
- while(defined($r = read(FROM,$buf,$size)) && $r > 0) {
- if (syswrite (TO,$buf,$r) != $r) {
- goto fail_inner;
+ $! = 0;
+ for (;;) {
+ my ($r, $w, $t);
+ defined($r = sysread(FROM, $buf, $size))
+ or goto fail_inner;
+ last unless $r;
+ for ($w = 0; $w < $r; $w += $t) {
+ $t = syswrite(TO, $buf, $r - $w, $w)
+ or goto fail_inner;
}
}
- goto fail_inner unless(defined($r));
+
close(TO) || goto fail_open2 if $closeto;
close(FROM) || goto fail_open1 if $closefrom;
- $\ = $recsep;
+
+ # Use this idiom to avoid uninitialized value warning.
return 1;
# All of these contortions try to preserve error messages...
$! = $status unless $!;
}
fail_open1:
- $\ = $recsep;
return 0;
}
+
+sub move {
+ my($from,$to) = @_;
+ my($copied,$fromsz,$tosz1,$tomt1,$tosz2,$tomt2,$sts,$ossts);
+
+ if (-d $to && ! -d $from) {
+ $to = _catname($from, $to);
+ }
+
+ ($tosz1,$tomt1) = (stat($to))[7,9];
+ $fromsz = -s $from;
+ if ($^O eq 'os2' and defined $tosz1 and defined $fromsz) {
+ # will not rename with overwrite
+ unlink $to;
+ }
+ return 1 if rename $from, $to;
+
+ ($sts,$ossts) = ($! + 0, $^E + 0);
+ # Did rename return an error even though it succeeded, because $to
+ # is on a remote NFS file system, and NFS lost the server's ack?
+ return 1 if defined($fromsz) && !-e $from && # $from disappeared
+ (($tosz2,$tomt2) = (stat($to))[7,9]) && # $to's there
+ ($tosz1 != $tosz2 or $tomt1 != $tomt2) && # and changed
+ $tosz2 == $fromsz; # it's all there
+
+ ($tosz1,$tomt1) = (stat($to))[7,9]; # just in case rename did something
+ return 1 if ($copied = copy($from,$to)) && unlink($from);
+
+ ($tosz2,$tomt2) = ((stat($to))[7,9],0,0) if defined $tomt1;
+ unlink($to) if !defined($tomt1) or $tomt1 != $tomt2 or $tosz1 != $tosz2;
+ ($!,$^E) = ($sts,$ossts);
+ return 0;
+}
+
*cp = \©
+*mv = \&move;
+
+# &syscopy is an XSUB under OS/2
+unless (defined &syscopy) {
+ if ($^O eq 'VMS') {
+ *syscopy = \&rmscopy;
+ } elsif ($^O eq 'mpeix') {
+ *syscopy = sub {
+ return 0 unless @_ == 0;
+ # Use the MPE cp program in order to
+ # preserve MPE file attributes.
+ return system('/bin/cp', '-f', $_[0], $_[1]) == 0;
+ };
+ } else {
+ *syscopy = \©
+ }
+}
1;
copy("file1","file2");
copy("Copy.pm",\*STDOUT);'
+ move("/dev1/fileA","/dev2/fileB");
use POSIX;
use File::Copy cp;
=head1 DESCRIPTION
-The Copy module provides one function (copy) which takes two
+The File::Copy module provides two basic functions, C<copy> and
+C<move>, which are useful for getting the contents of a file from
+one place to another.
+
+=over 4
+
+=item *
+
+The C<copy> function takes two
parameters: a file to copy from and a file to copy to. Either
argument may be a string, a FileHandle reference or a FileHandle
glob. Obviously, if the first argument is a filehandle of some
be opened for reading. Likewise, the second argument will be
written to (and created if need be).
+B<Note that passing in
+files as handles instead of names may lead to loss of information
+on some operating systems; it is recommended that you use file
+names whenever possible.> Files are opened in binary mode where
+applicable. To get a consistent behavour when copying from a
+filehandle to a file, use C<binmode> on the filehandle.
+
An optional third parameter can be used to specify the buffer
size used for copying. This is the number of bytes from the
first file, that wil be held in memory at any given time, before
upon the file, but will generally be the whole file (up to 2Mb), or
1k for filehandles that do not reference files (eg. sockets).
-When running under VMS, this routine performs an RMS copy of
-the file, in order to preserve file attributed, indexed file
-structure, I<etc.> The buffer size parameter is ignored.
-
You may use the syntax C<use File::Copy "cp"> to get at the
"cp" alias for this function. The syntax is I<exactly> the same.
+=item *
+
+The C<move> function also takes two parameters: the current name
+and the intended name of the file to be moved. If the destination
+already exists and is a directory, and the source is not a
+directory, then the source file will be renamed into the directory
+specified by the destination.
+
+If possible, move() will simply rename the file. Otherwise, it copies
+the file to the new location and deletes the original. If an error occurs
+during this copy-and-delete process, you may be left with a (possibly partial)
+copy of the file under the destination name.
+
+You may use the "mv" alias for this function in the same way that
+you may use the "cp" alias for C<copy>.
+
+=back
+
+File::Copy also provides the C<syscopy> routine, which copies the
+file specified in the first parameter to the file specified in the
+second parameter, preserving OS-specific attributes and file
+structure. For Unix systems, this is equivalent to the simple
+C<copy> routine. For VMS systems, this calls the C<rmscopy>
+routine (see below). For OS/2 systems, this calls the C<syscopy>
+XSUB directly.
+
+=head2 Special behavior if C<syscopy> is defined (VMS and OS/2)
+
+If both arguments to C<copy> are not file handles,
+then C<copy> will perform a "system copy" of
+the input file to a new output file, in order to preserve file
+attributes, indexed file structure, I<etc.> The buffer size
+parameter is ignored. If either argument to C<copy> is a
+handle to an opened file, then data is copied using Perl
+operators, and no effort is made to preserve file attributes
+or record structure.
+
+The system copy routine may also be called directly under VMS and OS/2
+as C<File::Copy::syscopy> (or under VMS as C<File::Copy::rmscopy>, which
+is the routine that does the actual work for syscopy).
+
+=over 4
+
+=item rmscopy($from,$to[,$date_flag])
+
+The first and second arguments may be strings, typeglobs, typeglob
+references, or objects inheriting from IO::Handle;
+they are used in all cases to obtain the
+I<filespec> of the input and output files, respectively. The
+name and type of the input file are used as defaults for the
+output file, if necessary.
+
+A new version of the output file is always created, which
+inherits the structure and RMS attributes of the input file,
+except for owner and protections (and possibly timestamps;
+see below). All data from the input file is copied to the
+output file; if either of the first two parameters to C<rmscopy>
+is a file handle, its position is unchanged. (Note that this
+means a file handle pointing to the output file will be
+associated with an old version of that file after C<rmscopy>
+returns, not the newly created version.)
+
+The third parameter is an integer flag, which tells C<rmscopy>
+how to handle timestamps. If it is E<lt> 0, none of the input file's
+timestamps are propagated to the output file. If it is E<gt> 0, then
+it is interpreted as a bitmask: if bit 0 (the LSB) is set, then
+timestamps other than the revision date are propagated; if bit 1
+is set, the revision date is propagated. If the third parameter
+to C<rmscopy> is 0, then it behaves much like the DCL COPY command:
+if the name or type of the output file was explicitly specified,
+then no timestamps are propagated, but if they were taken implicitly
+from the input filespec, then all timestamps other than the
+revision date are propagated. If this parameter is not supplied,
+it defaults to 0.
+
+Like C<copy>, C<rmscopy> returns 1 on success. If an error occurs,
+it sets C<$!>, deletes the output file, and returns 0.
+
+=back
+
=head1 RETURN
-Returns 1 on success, 0 on failure. $! will be set if an error was
-encountered.
+All functions return 1 on success, 0 on failure.
+$! will be set if an error was encountered.
=head1 AUTHOR
-File::Copy was written by Aaron Sherman <ajs@ajs.com> in 1995.
+File::Copy was written by Aaron Sherman I<E<lt>ajs@ajs.comE<gt>> in 1995,
+and updated by Charles Bailey I<E<lt>bailey@genetics.upenn.eduE<gt>> in 1996.
=cut
+
projects / p5sagit/p5-mst-13.2.git / blobdiff