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#============================================================= -*-perl-*-
#
# BackupPC::Zip::FileMember
#
# DESCRIPTION
#
# This library defines a BackupPC::Zip::FileMember class that subclass
# the Archive::Zip::FileMember class. This allows BackupPC_zipCreate
# to create zip files by reading and uncomressing BackupPC's pool
# files on the fly. This avoids the need to uncompress the files
# ahead of time and either store them in memory or on disk.
#
# AUTHOR
# Craig Barratt <cbarratt@users.sourceforge.net>
# Based on Archive::Zip::FileMember, Copyright (c) 2000 Ned Konz.
#
# COPYRIGHT
# Copyright (C) 2002-2020 Craig Barratt
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#========================================================================
#
# Version 4.4.0, released 20 Jun 2020.
#
# See http://backuppc.sourceforge.net.
#
#========================================================================
package BackupPC::Zip::FileMember;
use vars qw( @ISA );
@ISA = qw ( Archive::Zip::FileMember );
BEGIN { use Archive::Zip qw( :CONSTANTS :ERROR_CODES :UTILITY_METHODS ) }
# Given a file name, set up for eventual writing.
sub newFromFileNamed # BackupPC::Zip::FileMember
{
my $class = shift;
my $fileName = shift;
my $newName = shift || $fileName;
my $size = shift;
my $compress = shift;
return undef unless ( stat($fileName) && -r _ && !-d _ );
my $self = $class->new(@_);
$self->fileName($newName);
$self->{'externalFileName'} = $fileName;
$self->{'compressionMethod'} = COMPRESSION_STORED;
$self->{'compressedSize'} = $self->{'uncompressedSize'} = $size;
$self->{'fileCompressLevel'} = $compress;
$self->desiredCompressionMethod(
($self->compressedSize() > 0)
? COMPRESSION_DEFLATED
: COMPRESSION_STORED
);
$self->isTextFile(-T _ );
return $self;
}
sub rewindData # BackupPC::Zip::FileMember
{
my $self = shift;
my $status = $self->SUPER::rewindData(@_);
return $status unless $status == AZ_OK;
return AZ_IO_ERROR unless $self->fh();
$self->fh()->rewind();
return AZ_OK;
}
sub fh # BackupPC::Zip::FileMember
{
my $self = shift;
$self->_openFile() if !defined($self->{'bpcfh'});
return $self->{'bpcfh'};
}
# opens my file handle from my file name
sub _openFile # BackupPC::Zip::FileMember
{
my $self = shift;
my($fh) = BackupPC::XS::FileZIO::open($self->externalFileName(), 0, $self->{'fileCompressLevel'});
if ( !defined($fh) ) {
_ioError("Can't open", $self->externalFileName());
return undef;
}
$self->{'bpcfh'} = $fh;
return $fh;
}
# Closes my file handle
sub _closeFile # BackupPC::Zip::FileMember
{
my $self = shift;
$self->{'bpcfh'}->close() if ( defined($self->{'bpcfh'}) );
$self->{'bpcfh'} = undef;
}
# Make sure I close my file handle
sub endRead # BackupPC::Zip::FileMember
{
my $self = shift;
$self->_closeFile();
return $self->SUPER::endRead(@_);
}
# Return bytes read. Note that first parameter is a ref to a buffer.
# my $data;
# my ($bytesRead, $status) = $self->readRawChunk( \$data, $chunkSize );
sub _readRawChunk # BackupPC::Zip::FileMember
{
my($self, $dataRef, $chunkSize) = @_;
return (0, AZ_OK) unless $chunkSize;
my $bytesRead = $self->fh()->read($dataRef, $chunkSize)
or return (0, _ioError("reading data"));
return ($bytesRead, AZ_OK);
}
sub extractToFileNamed # BackupPC::Zip::FileMember
{
die("BackupPC::Zip::FileMember::extractToFileNamed not supported\n");
}
#
# There is a bug in Archive::Zip 1.30 that causes BackupPC_zipCreate
# to fail when compression is on and it is writing to an unseekable
# output file (eg: pipe or socket); see:
#
# https://rt.cpan.org/Public/Bug/Display.html?id=54827
#
# We overload the bitFlag function here to avoid the bug.
#
sub bitFlag
{
my $self = shift;
return $self->{bitFlag};
}
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