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#!/usr/bin/perl |
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#============================================================= -*-perl-*- |
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# |
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# BackupPC_tarIncCreate: create a tar archive of an existing incremental dump |
5 |
# |
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# |
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# DESCRIPTION |
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# |
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# Usage: BackupPC_tarIncCreate [options] |
10 |
# |
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# Flags: |
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# Required options: |
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# |
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# -h host Host from which the tar archive is created. |
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# -n dumpNum Dump number from which the tar archive is created. |
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# A negative number means relative to the end (eg -1 |
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# means the most recent dump, -2 2nd most recent etc). |
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# -s shareName Share name from which the tar archive is created. |
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# |
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# Other options: |
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# -t print summary totals |
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# -r pathRemove path prefix that will be replaced with pathAdd |
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# -p pathAdd new path prefix |
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# -b BLOCKS BLOCKS x 512 bytes per record (default 20; same as tar) |
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# -w writeBufSz write buffer size (default 1MB) |
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# |
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# The -h, -n and -s options specify which dump is used to generate |
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# the tar archive. The -r and -p options can be used to relocate |
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# the paths in the tar archive so extracted files can be placed |
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# in a location different from their original location. |
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# |
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# AUTHOR |
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# Craig Barratt <cbarratt@users.sourceforge.net> |
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# Ivan Klaric <iklaric@gmail.com> |
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# Dobrica Pavlinusic <dpavlin@rot13.org> |
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# |
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# COPYRIGHT |
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# Copyright (C) 2001-2003 Craig Barratt |
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# |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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#======================================================================== |
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# |
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# Version 2.1.0, released 20 Jun 2004. |
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# |
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# See http://backuppc.sourceforge.net. |
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# |
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#======================================================================== |
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|
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use strict; |
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no utf8; |
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use lib "__INSTALLDIR__/lib"; |
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use File::Path; |
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use Getopt::Std; |
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use DBI; |
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use BackupPC::Lib; |
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use BackupPC::Attrib qw(:all); |
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use BackupPC::FileZIO; |
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use BackupPC::View; |
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use BackupPC::SearchLib; |
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use Time::HiRes qw/time/; |
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use POSIX qw/strftime/; |
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use Data::Dumper; ### FIXME |
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|
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die("BackupPC::Lib->new failed\n") if ( !(my $bpc = BackupPC::Lib->new) ); |
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my $TopDir = $bpc->TopDir(); |
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my $BinDir = $bpc->BinDir(); |
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my %Conf = $bpc->Conf(); |
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my %opts; |
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my $in_backup_increment; |
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|
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|
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if ( !getopts("th:n:p:r:s:b:w:", \%opts) ) { |
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print STDERR <<EOF; |
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usage: $0 [options] |
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Required options: |
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-h host host from which the tar archive is created |
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-n dumpNum dump number from which the tar archive is created |
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A negative number means relative to the end (eg -1 |
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means the most recent dump, -2 2nd most recent etc). |
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-s shareName share name from which the tar archive is created |
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|
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Other options: |
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-t print summary totals |
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-r pathRemove path prefix that will be replaced with pathAdd |
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-p pathAdd new path prefix |
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-b BLOCKS BLOCKS x 512 bytes per record (default 20; same as tar) |
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-w writeBufSz write buffer size (default 1048576 = 1MB) |
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EOF |
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exit(1); |
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} |
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|
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if ( $opts{h} !~ /^([\w\.\s-]+)$/ ) { |
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print(STDERR "$0: bad host name '$opts{h}'\n"); |
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exit(1); |
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} |
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my $Host = $opts{h}; |
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|
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if ( $opts{n} !~ /^(-?\d+)$/ ) { |
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print(STDERR "$0: bad dump number '$opts{n}'\n"); |
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exit(1); |
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} |
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my $Num = $opts{n}; |
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|
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my @Backups = $bpc->BackupInfoRead($Host); |
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my $FileCnt = 0; |
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my $ByteCnt = 0; |
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my $DirCnt = 0; |
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my $SpecialCnt = 0; |
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my $ErrorCnt = 0; |
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|
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my $i; |
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$Num = $Backups[@Backups + $Num]{num} if ( -@Backups <= $Num && $Num < 0 ); |
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for ( $i = 0 ; $i < @Backups ; $i++ ) { |
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last if ( $Backups[$i]{num} == $Num ); |
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} |
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if ( $i >= @Backups ) { |
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print(STDERR "$0: bad backup number $Num for host $Host\n"); |
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exit(1); |
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} |
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|
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my $PathRemove = $1 if ( $opts{r} =~ /(.+)/ ); |
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my $PathAdd = $1 if ( $opts{p} =~ /(.+)/ ); |
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if ( $opts{s} !~ /^([\w\s\.\/\$-]+)$/ && $opts{s} ne "*" ) { |
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print(STDERR "$0: bad share name '$opts{s}'\n"); |
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exit(1); |
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} |
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our $ShareName = $opts{s}; |
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our $view = BackupPC::View->new($bpc, $Host, \@Backups); |
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|
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# |
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# This constant and the line of code below that uses it are borrowed |
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# from Archive::Tar. Thanks to Calle Dybedahl and Stephen Zander. |
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# See www.cpan.org. |
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# |
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# Archive::Tar is Copyright 1997 Calle Dybedahl. All rights reserved. |
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# Copyright 1998 Stephen Zander. All rights reserved. |
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# |
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my $tar_pack_header |
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= 'a100 a8 a8 a8 a12 a12 A8 a1 a100 a6 a2 a32 a32 a8 a8 a155 x12'; |
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my $tar_header_length = 512; |
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|
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my $BufSize = $opts{w} || 1048576; # 1MB or 2^20 |
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my $WriteBuf = ""; |
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my $WriteBufSz = ($opts{b} || 20) * $tar_header_length; |
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|
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my(%UidCache, %GidCache); |
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my(%HardLinkExtraFiles, @HardLinks); |
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|
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# |
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# Write out all the requested files/directories |
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# |
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binmode(STDOUT); |
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my $fh = *STDOUT; |
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|
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if (seedCache($Host, $ShareName, $Num)) { |
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archiveWrite($fh, '/'); |
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archiveWriteHardLinks($fh); |
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} else { |
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print STDERR "NOTE: no files found for $Host:$ShareName, increment $Num\n"; |
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} |
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|
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# |
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# Finish with two null 512 byte headers, and then round out a full |
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# block. |
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# |
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my $data = "\0" x ($tar_header_length * 2); |
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TarWrite($fh, \$data); |
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TarWrite($fh, undef); |
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|
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# |
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# print out totals if requested |
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# |
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if ( $opts{t} ) { |
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print STDERR "Done: $FileCnt files, $ByteCnt bytes, $DirCnt dirs,", |
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" $SpecialCnt specials, $ErrorCnt errors\n"; |
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} |
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if ( $ErrorCnt && !$FileCnt && !$DirCnt ) { |
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# |
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# Got errors, with no files or directories; exit with non-zero |
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# status |
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# |
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exit(1); |
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} |
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exit(0); |
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|
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########################################################################### |
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# Subroutines |
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########################################################################### |
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|
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sub archiveWrite |
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{ |
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my($fh, $dir, $tarPathOverride) = @_; |
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|
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if ( $dir =~ m{(^|/)\.\.(/|$)} ) { |
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print(STDERR "$0: bad directory '$dir'\n"); |
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$ErrorCnt++; |
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return; |
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} |
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$dir = "/" if ( $dir eq "." ); |
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#print(STDERR "calling find with $Num, $ShareName, $dir\n"); |
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|
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if ( $view->find($Num, $ShareName, $dir, 0, \&TarWriteFile, |
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$fh, $tarPathOverride) < 0 ) { |
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print(STDERR "$0: bad share or directory '$ShareName/$dir'\n"); |
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$ErrorCnt++; |
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return; |
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} |
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} |
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|
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# |
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# Write out any hardlinks (if any) |
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# |
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sub archiveWriteHardLinks |
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{ |
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my $fh = @_; |
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foreach my $hdr ( @HardLinks ) { |
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$hdr->{size} = 0; |
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if ( defined($PathRemove) |
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&& substr($hdr->{linkname}, 0, length($PathRemove)+1) |
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eq ".$PathRemove" ) { |
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substr($hdr->{linkname}, 0, length($PathRemove)+1) = ".$PathAdd"; |
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} |
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TarWriteFileInfo($fh, $hdr); |
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} |
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@HardLinks = (); |
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%HardLinkExtraFiles = (); |
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} |
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|
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sub UidLookup |
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{ |
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my($uid) = @_; |
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|
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$UidCache{$uid} = (getpwuid($uid))[0] if ( !exists($UidCache{$uid}) ); |
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return $UidCache{$uid}; |
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} |
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|
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sub GidLookup |
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{ |
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my($gid) = @_; |
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|
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$GidCache{$gid} = (getgrgid($gid))[0] if ( !exists($GidCache{$gid}) ); |
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return $GidCache{$gid}; |
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} |
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|
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sub TarWrite |
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{ |
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my($fh, $dataRef) = @_; |
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|
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if ( !defined($dataRef) ) { |
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# |
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# do flush by padding to a full $WriteBufSz |
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# |
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my $data = "\0" x ($WriteBufSz - length($WriteBuf)); |
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$dataRef = \$data; |
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} |
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if ( length($WriteBuf) + length($$dataRef) < $WriteBufSz ) { |
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# |
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# just buffer and return |
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# |
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$WriteBuf .= $$dataRef; |
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return; |
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} |
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my $done = $WriteBufSz - length($WriteBuf); |
277 |
if ( syswrite($fh, $WriteBuf . substr($$dataRef, 0, $done)) |
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!= $WriteBufSz ) { |
279 |
print(STDERR "Unable to write to output file ($!)\n"); |
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exit(1); |
281 |
} |
282 |
while ( $done + $WriteBufSz <= length($$dataRef) ) { |
283 |
if ( syswrite($fh, substr($$dataRef, $done, $WriteBufSz)) |
284 |
!= $WriteBufSz ) { |
285 |
print(STDERR "Unable to write to output file ($!)\n"); |
286 |
exit(1); |
287 |
} |
288 |
$done += $WriteBufSz; |
289 |
} |
290 |
$WriteBuf = substr($$dataRef, $done); |
291 |
} |
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|
293 |
sub TarWritePad |
294 |
{ |
295 |
my($fh, $size) = @_; |
296 |
|
297 |
if ( $size % $tar_header_length ) { |
298 |
my $data = "\0" x ($tar_header_length - ($size % $tar_header_length)); |
299 |
TarWrite($fh, \$data); |
300 |
} |
301 |
} |
302 |
|
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sub TarWriteHeader |
304 |
{ |
305 |
my($fh, $hdr) = @_; |
306 |
|
307 |
$hdr->{uname} = UidLookup($hdr->{uid}) if ( !defined($hdr->{uname}) ); |
308 |
$hdr->{gname} = GidLookup($hdr->{gid}) if ( !defined($hdr->{gname}) ); |
309 |
my $devmajor = defined($hdr->{devmajor}) ? sprintf("%07o", $hdr->{devmajor}) |
310 |
: ""; |
311 |
my $devminor = defined($hdr->{devminor}) ? sprintf("%07o", $hdr->{devminor}) |
312 |
: ""; |
313 |
my $sizeStr; |
314 |
if ( $hdr->{size} >= 2 * 65536 * 65536 ) { |
315 |
# |
316 |
# GNU extension for files >= 8GB: send size in big-endian binary |
317 |
# |
318 |
$sizeStr = pack("c4 N N", 0x80, 0, 0, 0, |
319 |
$hdr->{size} / (65536 * 65536), |
320 |
$hdr->{size} % (65536 * 65536)); |
321 |
} elsif ( $hdr->{size} >= 1 * 65536 * 65536 ) { |
322 |
# |
323 |
# sprintf octal only handles up to 2^32 - 1 |
324 |
# |
325 |
$sizeStr = sprintf("%03o", $hdr->{size} / (1 << 24)) |
326 |
. sprintf("%08o", $hdr->{size} % (1 << 24)); |
327 |
} else { |
328 |
$sizeStr = sprintf("%011o", $hdr->{size}); |
329 |
} |
330 |
my $data = pack($tar_pack_header, |
331 |
substr($hdr->{name}, 0, 99), |
332 |
sprintf("%07o", $hdr->{mode}), |
333 |
sprintf("%07o", $hdr->{uid}), |
334 |
sprintf("%07o", $hdr->{gid}), |
335 |
$sizeStr, |
336 |
sprintf("%011o", $hdr->{mtime}), |
337 |
"", #checksum field - space padded by pack("A8") |
338 |
$hdr->{type}, |
339 |
substr($hdr->{linkname}, 0, 99), |
340 |
$hdr->{magic} || 'ustar ', |
341 |
$hdr->{version} || ' ', |
342 |
$hdr->{uname}, |
343 |
$hdr->{gname}, |
344 |
$devmajor, |
345 |
$devminor, |
346 |
"" # prefix is empty |
347 |
); |
348 |
substr($data, 148, 7) = sprintf("%06o\0", unpack("%16C*",$data)); |
349 |
TarWrite($fh, \$data); |
350 |
} |
351 |
|
352 |
sub TarWriteFileInfo |
353 |
{ |
354 |
my($fh, $hdr) = @_; |
355 |
|
356 |
# |
357 |
# Handle long link names (symbolic links) |
358 |
# |
359 |
if ( length($hdr->{linkname}) > 99 ) { |
360 |
my %h; |
361 |
my $data = $hdr->{linkname} . "\0"; |
362 |
$h{name} = "././\@LongLink"; |
363 |
$h{type} = "K"; |
364 |
$h{size} = length($data); |
365 |
TarWriteHeader($fh, \%h); |
366 |
TarWrite($fh, \$data); |
367 |
TarWritePad($fh, length($data)); |
368 |
} |
369 |
# |
370 |
# Handle long file names |
371 |
# |
372 |
if ( length($hdr->{name}) > 99 ) { |
373 |
my %h; |
374 |
my $data = $hdr->{name} . "\0"; |
375 |
$h{name} = "././\@LongLink"; |
376 |
$h{type} = "L"; |
377 |
$h{size} = length($data); |
378 |
TarWriteHeader($fh, \%h); |
379 |
TarWrite($fh, \$data); |
380 |
TarWritePad($fh, length($data)); |
381 |
} |
382 |
TarWriteHeader($fh, $hdr); |
383 |
} |
384 |
|
385 |
# |
386 |
# seed cache of files in this increment |
387 |
# |
388 |
sub seedCache($$$) { |
389 |
my ($host, $share, $dumpNo) = @_; |
390 |
|
391 |
my $dsn = $Conf{SearchDSN}; |
392 |
my $db_user = $Conf{SearchUser} || ''; |
393 |
|
394 |
print STDERR curr_time(), "getting files for $host:$share increment $dumpNo..."; |
395 |
my $sql = q{ |
396 |
SELECT path |
397 |
FROM files |
398 |
JOIN shares on shares.id = shareid |
399 |
JOIN hosts on hosts.id = shares.hostid |
400 |
WHERE hosts.name = ? and shares.name = ? and backupnum = ? |
401 |
}; |
402 |
|
403 |
my $dbh = DBI->connect($dsn, $db_user, "", { RaiseError => 1, AutoCommit => 1} ); |
404 |
my $sth = $dbh->prepare($sql); |
405 |
$sth->execute($host, $share, $dumpNo); |
406 |
my $count = $sth->rows; |
407 |
print STDERR " found $count items\n"; |
408 |
while (my $row = $sth->fetchrow_arrayref) { |
409 |
print STDERR "+ ", $row->[0],"\n"; |
410 |
$in_backup_increment->{ $row->[0] }++; |
411 |
} |
412 |
|
413 |
$sth->finish(); |
414 |
$dbh->disconnect(); |
415 |
|
416 |
return $count; |
417 |
} |
418 |
|
419 |
my $Attr; |
420 |
my $AttrDir; |
421 |
|
422 |
sub TarWriteFile |
423 |
{ |
424 |
my($hdr, $fh, $tarPathOverride) = @_; |
425 |
|
426 |
my $tarPath = $hdr->{relPath}; |
427 |
$tarPath = $tarPathOverride if ( defined($tarPathOverride) ); |
428 |
|
429 |
$tarPath =~ s{//+}{/}g; |
430 |
|
431 |
#print STDERR "? $tarPath\n"; |
432 |
return unless ($in_backup_increment->{$tarPath}); |
433 |
print STDERR "A $tarPath\n"; |
434 |
|
435 |
if ( defined($PathRemove) |
436 |
&& substr($tarPath, 0, length($PathRemove)) eq $PathRemove ) { |
437 |
substr($tarPath, 0, length($PathRemove)) = $PathAdd; |
438 |
} |
439 |
$tarPath = "./" . $tarPath if ( $tarPath !~ /^\.\// ); |
440 |
$tarPath =~ s{//+}{/}g; |
441 |
$hdr->{name} = $tarPath; |
442 |
|
443 |
if ( $hdr->{type} == BPC_FTYPE_DIR ) { |
444 |
# |
445 |
# Directory: just write the header |
446 |
# |
447 |
|
448 |
|
449 |
$hdr->{name} .= "/" if ( $hdr->{name} !~ m{/$} ); |
450 |
TarWriteFileInfo($fh, $hdr); |
451 |
$DirCnt++; |
452 |
} elsif ( $hdr->{type} == BPC_FTYPE_FILE ) { |
453 |
# |
454 |
# Regular file: write the header and file |
455 |
# |
456 |
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, $hdr->{compress}); |
457 |
if ( !defined($f) ) { |
458 |
print(STDERR "Unable to open file $hdr->{fullPath}\n"); |
459 |
$ErrorCnt++; |
460 |
return; |
461 |
} |
462 |
TarWriteFileInfo($fh, $hdr); |
463 |
my($data, $size); |
464 |
while ( $f->read(\$data, $BufSize) > 0 ) { |
465 |
TarWrite($fh, \$data); |
466 |
$size += length($data); |
467 |
} |
468 |
$f->close; |
469 |
TarWritePad($fh, $size); |
470 |
$FileCnt++; |
471 |
$ByteCnt += $size; |
472 |
} elsif ( $hdr->{type} == BPC_FTYPE_HARDLINK ) { |
473 |
# |
474 |
# Hardlink file: either write a hardlink or the complete file |
475 |
# depending upon whether the linked-to file will be written |
476 |
# to the archive. |
477 |
# |
478 |
# Start by reading the contents of the link. |
479 |
# |
480 |
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, $hdr->{compress}); |
481 |
if ( !defined($f) ) { |
482 |
print(STDERR "Unable to open file $hdr->{fullPath}\n"); |
483 |
$ErrorCnt++; |
484 |
return; |
485 |
} |
486 |
my $data; |
487 |
while ( $f->read(\$data, $BufSize) > 0 ) { |
488 |
$hdr->{linkname} .= $data; |
489 |
} |
490 |
$f->close; |
491 |
my $done = 0; |
492 |
my $name = $hdr->{linkname}; |
493 |
$name =~ s{^\./}{/}; |
494 |
if ( $HardLinkExtraFiles{$name} ) { |
495 |
# |
496 |
# Target file will be or was written, so just remember |
497 |
# the hardlink so we can dump it later. |
498 |
# |
499 |
push(@HardLinks, $hdr); |
500 |
$SpecialCnt++; |
501 |
} else { |
502 |
# |
503 |
# Have to dump the original file. Just call the top-level |
504 |
# routine, so that we save the hassle of dealing with |
505 |
# mangling, merging and attributes. |
506 |
# |
507 |
$HardLinkExtraFiles{$hdr->{linkname}} = 1; |
508 |
archiveWrite($fh, $hdr->{linkname}, $hdr->{name}); |
509 |
} |
510 |
} elsif ( $hdr->{type} == BPC_FTYPE_SYMLINK ) { |
511 |
# |
512 |
# Symbolic link: read the symbolic link contents into the header |
513 |
# and write the header. |
514 |
# |
515 |
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, $hdr->{compress}); |
516 |
if ( !defined($f) ) { |
517 |
print(STDERR "Unable to open symlink file $hdr->{fullPath}\n"); |
518 |
$ErrorCnt++; |
519 |
return; |
520 |
} |
521 |
my $data; |
522 |
while ( $f->read(\$data, $BufSize) > 0 ) { |
523 |
$hdr->{linkname} .= $data; |
524 |
} |
525 |
$f->close; |
526 |
$hdr->{size} = 0; |
527 |
TarWriteFileInfo($fh, $hdr); |
528 |
$SpecialCnt++; |
529 |
} elsif ( $hdr->{type} == BPC_FTYPE_CHARDEV |
530 |
|| $hdr->{type} == BPC_FTYPE_BLOCKDEV |
531 |
|| $hdr->{type} == BPC_FTYPE_FIFO ) { |
532 |
# |
533 |
# Special files: for char and block special we read the |
534 |
# major and minor numbers from a plain file. |
535 |
# |
536 |
if ( $hdr->{type} != BPC_FTYPE_FIFO ) { |
537 |
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, |
538 |
$hdr->{compress}); |
539 |
my $data; |
540 |
if ( !defined($f) || $f->read(\$data, $BufSize) < 0 ) { |
541 |
print(STDERR "Unable to open/read char/block special file" |
542 |
. " $hdr->{fullPath}\n"); |
543 |
$f->close if ( defined($f) ); |
544 |
$ErrorCnt++; |
545 |
return; |
546 |
} |
547 |
$f->close; |
548 |
if ( $data =~ /(\d+),(\d+)/ ) { |
549 |
$hdr->{devmajor} = $1; |
550 |
$hdr->{devminor} = $2; |
551 |
} |
552 |
} |
553 |
$hdr->{size} = 0; |
554 |
TarWriteFileInfo($fh, $hdr); |
555 |
$SpecialCnt++; |
556 |
} else { |
557 |
print(STDERR "Got unknown type $hdr->{type} for $hdr->{name}\n"); |
558 |
$ErrorCnt++; |
559 |
} |
560 |
} |
561 |
|
562 |
my $t_fmt = '%Y-%m-%d %H:%M:%S'; |
563 |
sub curr_time { |
564 |
return strftime($t_fmt,localtime()); |
565 |
} |