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BackupPC-XS-0.62
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/ BackupPC::XS

NAME

BackupPC::XS - Perl extension for BackupPC libraries

SYNOPSIS


            

              
              
use BackupPC::XS;
use BackupPC::XS qw( :all );

DESCRIPTION

BackupPC::XS provides various submodules that implement various BackupPC library functions. The following sections describe each submodule.

This documentation is very terse. BackupPC::XS is not intended to be a general-purpose module - it is closely tied to BackupPC. Look in the BackupPC code to see examples of using this module.

BackupPC::XS::FileZIO

Compressed file I/O using zlib:


            

              
              
$fd = BackupPC::XS::FileZIO::open($fileName, $writeFlag, $compressLevel);
$fd = BackupPC::XS::FileZIO::fdopen($stream, $writeFlag, $compressLevel);
$nWrite   = $fd->write($dataRef);
$nRead    = $fd->read($dataRef, $maxRead);
$textLine = $fd->readLine();
$fd->rewind();
$fd->close();
$fd->writeTeeStderr($boolean);

BackupPC::XS::PoolRefCnt

Pool file reference counting:


            

              
              
$countDB = BackupPC::XS::PoolRefCnt::new(initialEntryCnt);
$refCount = $countDB->get($digest);
$countDB->set($digest, $refCount);
$countDB->delete($digest);
$countDB->incr($digest, $refIncr);
($digest, $refCnt, $idx) = $countDB->iterate($idx);
$countDB->read($fileName);
$countDB->write($fileName);
$countDB->print();

Pool file delta accumulation:


            

              
              
BackupPC::XS::PoolRefCnt::DeltaFileInit($hostDir);
BackupPC::XS::PoolRefCnt::DeltaFileFlush();
BackupPC::XS::PoolRefCnt::DeltaUpdate($digest, $refIncr);
BackupPC::XS::PoolRefCnt::DeltaPrint();

BackupPC::XS::PoolWrite

Writing and matching files in the pool:


            

              
              
$poolWrite = BackupPC::XS::PoolWrite::new($compressLevel [, $digest]);
$poolWrite->write($dataRef);
($match, $digest, $poolSize, $error) = $poolWrite->close();
$poolWrite->addToPool($fileName, $isV3PoolFile);

BackupPC::XS::Attrib

Manipulating a set of files and attributes (typically one directory's worth):


            

              
              
$a = BackupPC::XS::Attrib::new($compressLevel);
$attrHash = $a->get($fileName);
$a->set($fileName, $attrHash);
$numDirEntries = $a->count();
$a->read($dirPath, $attribFileName);
$a->write($dirPath, $attribFileName);
$textType = BackupPC::XS::Attrib::fileType2Text(BPC_FTYPE_....);

BackupPC::XS::AttribCache

Maintain a cache of directories, with full share/path semantics.


            

              
              
$ac = BackupPC::XS::AttribCache::new($host, $backupNum, $shareNameUM, $compress);
$attrHash = $ac->get($fileName, $allocateIfMissing, $dontReadInode);
$ac->set($fileName, $attrHash, $dontOverwriteInode);
$ac->delete($fileName);
$attrHash = $ac->getInode($inode, $allocateIfMissing);
$ac->setInode($inode, $attrHash);
$ac->deleteInode($inode);
$ac->getAll($path, $dontReadInode);
$ac->flush($all, $path);
$ac->getFullMangledPath($path);

BackupPC::XS::DirOps


            

              
              
$zeroMeansOk = BackupPC::XS::DirOps::path_create($path);
$errorCnt = BackupPC::XS::DirOps::path_remove($path, $compress);
$errorCnt = BackupPC::XS::DirOps::refCountAll($path, $compress);
$lockFd = BackupPC::XS::DirOps::lockRangeFile($lockFile, $offset, $len, $block);
BackupPC::XS::DirOps::unlockRangeFile($lockFd);

BackupPC::XS::Lib


            

              
              
BackupPC::XS::Lib::ConfInit($topDir, $hardLinkMax, $poolV3Enabled, $logLevel)
$messageArrayRef = BackupPC::XS::Lib::logMsgGet();
$errorCnt = BackupPC::XS::Lib::logErrorCntGet;
BackupPC::XS::Lib::logLevelSet($level);

EXPORTS

If you specify :all (see SYNOPSIS), then the BPC_FTYPE_ values are exported.

SEE ALSO

BackupPC, backuppc.sourceforge.net.

rsync-bpc.

AUTHOR

Craig Barratt, <cbarratt@users.sourceforge.net<gt>

COPYRIGHT AND LICENSE

BackupPC code is copyright (C) 2013-2017 Craig Barratt <cbarratt@users.sourceforge.net>.

bpc_hashTable.c is based on code from rsync. Rsync is Copyright (C) 1996-2001 by Andrew Tridgell, 1996 by Paul Mackerras, 2001-2002 by Martin Pool, and 2003-2009 by Wayne Davison, and others.

The md5 library is from the rsync codebase, and is Copyright (C) 2001-2003 Christophe Devine. See the code for the license.

The zlib library is from the rsync codebase, and is Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler. See the code for the license.

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, visit the http://fsf.org website.