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dpavlin |
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#!/bin/perl |
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#============================================================= -*-perl-*- |
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# |
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# BackupPC_tarCreate: create a tar archive of an existing dump |
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# for restore on a client. |
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# |
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# DESCRIPTION |
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# |
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# Usage: BackupPC_tarCreate [options] files/directories... |
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# |
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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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# |
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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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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 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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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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if ( !getopts("th:n:p:r:s:b:w:", \%opts) || @ARGV < 1 ) { |
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print STDERR <<EOF; |
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usage: $0 [options] files/directories... |
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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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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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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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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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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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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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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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# 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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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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my(%UidCache, %GidCache); |
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my(%HardLinkExtraFiles, @HardLinks); |
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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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if ( $ShareName eq "*" ) { |
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my $PathRemoveOrig = $PathRemove; |
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my $PathAddOrig = $PathAdd; |
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foreach $ShareName ( $view->shareList($Num) ) { |
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#print(STDERR "Doing share ($ShareName)\n"); |
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$PathRemove = "/" if ( !defined($PathRemoveOrig) ); |
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($PathAdd = "/$ShareName/$PathAddOrig") =~ s{//+}{/}g; |
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foreach my $dir ( @ARGV ) { |
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archiveWrite($fh, $dir); |
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} |
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archiveWriteHardLinks($fh); |
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} |
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} else { |
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foreach my $dir ( @ARGV ) { |
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archiveWrite($fh, $dir); |
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} |
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archiveWriteHardLinks($fh); |
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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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# 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 && !$DirCnt ) { |
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# |
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# Got errors, with no files or directories; exit with non-zero |
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# status |
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# |
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exit(1); |
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} |
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exit(0); |
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########################################################################### |
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# Subroutines |
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########################################################################### |
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sub archiveWrite |
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{ |
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my($fh, $dir, $tarPathOverride) = @_; |
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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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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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# 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, $hdr); |
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} |
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@HardLinks = (); |
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%HardLinkExtraFiles = (); |
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} |
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sub UidLookup |
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{ |
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my($uid) = @_; |
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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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sub GidLookup |
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{ |
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my($gid) = @_; |
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$GidCache{$gid} = (getgrgid($gid))[0] if ( !exists($GidCache{$gid}) ); |
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return $GidCache{$gid}; |
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} |
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sub TarWrite |
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{ |
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my($fh, $dataRef) = @_; |
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if ( !defined($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); |
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if ( syswrite($fh, $WriteBuf . substr($$dataRef, 0, $done)) |
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!= $WriteBufSz ) { |
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print(STDERR "Unable to write to output file ($!)\n"); |
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exit(1); |
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} |
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while ( $done + $WriteBufSz <= length($$dataRef) ) { |
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if ( syswrite($fh, substr($$dataRef, $done, $WriteBufSz)) |
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!= $WriteBufSz ) { |
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print(STDERR "Unable to write to output file ($!)\n"); |
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exit(1); |
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} |
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$done += $WriteBufSz; |
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} |
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$WriteBuf = substr($$dataRef, $done); |
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} |
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sub TarWritePad |
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{ |
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my($fh, $size) = @_; |
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if ( $size % $tar_header_length ) { |
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my $data = "\0" x ($tar_header_length - ($size % $tar_header_length)); |
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TarWrite($fh, \$data); |
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} |
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} |
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sub TarWriteHeader |
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{ |
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my($fh, $hdr) = @_; |
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$hdr->{uname} = UidLookup($hdr->{uid}) if ( !defined($hdr->{uname}) ); |
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$hdr->{gname} = GidLookup($hdr->{gid}) if ( !defined($hdr->{gname}) ); |
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my $devmajor = defined($hdr->{devmajor}) ? sprintf("%07o", $hdr->{devmajor}) |
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: ""; |
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my $devminor = defined($hdr->{devminor}) ? sprintf("%07o", $hdr->{devminor}) |
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: ""; |
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my $sizeStr; |
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if ( $hdr->{size} >= 2 * 65536 * 65536 ) { |
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# |
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# GNU extension for files >= 8GB: send size in big-endian binary |
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# |
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$sizeStr = pack("c4 N N", 0x80, 0, 0, 0, |
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$hdr->{size} / (65536 * 65536), |
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$hdr->{size} % (65536 * 65536)); |
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} elsif ( $hdr->{size} >= 1 * 65536 * 65536 ) { |
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# |
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# sprintf octal only handles up to 2^32 - 1 |
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# |
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$sizeStr = sprintf("%03o", $hdr->{size} / (1 << 24)) |
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. sprintf("%08o", $hdr->{size} % (1 << 24)); |
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} else { |
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$sizeStr = sprintf("%011o", $hdr->{size}); |
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} |
| 332 |
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my $data = pack($tar_pack_header, |
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substr($hdr->{name}, 0, 99), |
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sprintf("%07o", $hdr->{mode}), |
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sprintf("%07o", $hdr->{uid}), |
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sprintf("%07o", $hdr->{gid}), |
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$sizeStr, |
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sprintf("%011o", $hdr->{mtime}), |
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"", #checksum field - space padded by pack("A8") |
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$hdr->{type}, |
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substr($hdr->{linkname}, 0, 99), |
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$hdr->{magic} || 'ustar ', |
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$hdr->{version} || ' ', |
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$hdr->{uname}, |
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$hdr->{gname}, |
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$devmajor, |
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$devminor, |
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"" # prefix is empty |
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); |
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substr($data, 148, 7) = sprintf("%06o\0", unpack("%16C*",$data)); |
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TarWrite($fh, \$data); |
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} |
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sub TarWriteFileInfo |
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{ |
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my($fh, $hdr) = @_; |
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# |
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# Handle long link names (symbolic links) |
| 360 |
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# |
| 361 |
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if ( length($hdr->{linkname}) > 99 ) { |
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my %h; |
| 363 |
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my $data = $hdr->{linkname} . "\0"; |
| 364 |
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$h{name} = "././\@LongLink"; |
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|
$h{type} = "K"; |
| 366 |
|
|
$h{size} = length($data); |
| 367 |
|
|
TarWriteHeader($fh, \%h); |
| 368 |
|
|
TarWrite($fh, \$data); |
| 369 |
|
|
TarWritePad($fh, length($data)); |
| 370 |
|
|
} |
| 371 |
|
|
# |
| 372 |
|
|
# Handle long file names |
| 373 |
|
|
# |
| 374 |
|
|
if ( length($hdr->{name}) > 99 ) { |
| 375 |
|
|
my %h; |
| 376 |
|
|
my $data = $hdr->{name} . "\0"; |
| 377 |
|
|
$h{name} = "././\@LongLink"; |
| 378 |
|
|
$h{type} = "L"; |
| 379 |
|
|
$h{size} = length($data); |
| 380 |
|
|
TarWriteHeader($fh, \%h); |
| 381 |
|
|
TarWrite($fh, \$data); |
| 382 |
|
|
TarWritePad($fh, length($data)); |
| 383 |
|
|
} |
| 384 |
|
|
TarWriteHeader($fh, $hdr); |
| 385 |
|
|
} |
| 386 |
|
|
|
| 387 |
|
|
my $Attr; |
| 388 |
|
|
my $AttrDir; |
| 389 |
|
|
|
| 390 |
|
|
sub TarWriteFile |
| 391 |
|
|
{ |
| 392 |
|
|
my($hdr, $fh, $tarPathOverride) = @_; |
| 393 |
|
|
|
| 394 |
|
|
my $tarPath = $hdr->{relPath}; |
| 395 |
|
|
$tarPath = $tarPathOverride if ( defined($tarPathOverride) ); |
| 396 |
|
|
|
| 397 |
|
|
$tarPath =~ s{//+}{/}g; |
| 398 |
|
|
if ( defined($PathRemove) |
| 399 |
|
|
&& substr($tarPath, 0, length($PathRemove)) eq $PathRemove ) { |
| 400 |
|
|
substr($tarPath, 0, length($PathRemove)) = $PathAdd; |
| 401 |
|
|
} |
| 402 |
|
|
$tarPath = "./" . $tarPath if ( $tarPath !~ /^\.\// ); |
| 403 |
|
|
$tarPath =~ s{//+}{/}g; |
| 404 |
|
|
$hdr->{name} = $tarPath; |
| 405 |
|
|
|
| 406 |
|
|
if ( $hdr->{type} == BPC_FTYPE_DIR ) { |
| 407 |
|
|
# |
| 408 |
|
|
# Directory: just write the header |
| 409 |
|
|
# |
| 410 |
|
|
$hdr->{name} .= "/" if ( $hdr->{name} !~ m{/$} ); |
| 411 |
|
|
TarWriteFileInfo($fh, $hdr); |
| 412 |
|
|
$DirCnt++; |
| 413 |
|
|
} elsif ( $hdr->{type} == BPC_FTYPE_FILE ) { |
| 414 |
|
|
# |
| 415 |
|
|
# Regular file: write the header and file |
| 416 |
|
|
# |
| 417 |
|
|
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, $hdr->{compress}); |
| 418 |
|
|
if ( !defined($f) ) { |
| 419 |
|
|
print(STDERR "Unable to open file $hdr->{fullPath}\n"); |
| 420 |
|
|
$ErrorCnt++; |
| 421 |
|
|
return; |
| 422 |
|
|
} |
| 423 |
|
|
TarWriteFileInfo($fh, $hdr); |
| 424 |
|
|
my($data, $size); |
| 425 |
|
|
while ( $f->read(\$data, $BufSize) > 0 ) { |
| 426 |
|
|
TarWrite($fh, \$data); |
| 427 |
|
|
$size += length($data); |
| 428 |
|
|
} |
| 429 |
|
|
$f->close; |
| 430 |
|
|
TarWritePad($fh, $size); |
| 431 |
|
|
$FileCnt++; |
| 432 |
|
|
$ByteCnt += $size; |
| 433 |
|
|
} elsif ( $hdr->{type} == BPC_FTYPE_HARDLINK ) { |
| 434 |
|
|
# |
| 435 |
|
|
# Hardlink file: either write a hardlink or the complete file |
| 436 |
|
|
# depending upon whether the linked-to file will be written |
| 437 |
|
|
# to the archive. |
| 438 |
|
|
# |
| 439 |
|
|
# Start by reading the contents of the link. |
| 440 |
|
|
# |
| 441 |
|
|
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, $hdr->{compress}); |
| 442 |
|
|
if ( !defined($f) ) { |
| 443 |
|
|
print(STDERR "Unable to open file $hdr->{fullPath}\n"); |
| 444 |
|
|
$ErrorCnt++; |
| 445 |
|
|
return; |
| 446 |
|
|
} |
| 447 |
|
|
my $data; |
| 448 |
|
|
while ( $f->read(\$data, $BufSize) > 0 ) { |
| 449 |
|
|
$hdr->{linkname} .= $data; |
| 450 |
|
|
} |
| 451 |
|
|
$f->close; |
| 452 |
|
|
# |
| 453 |
|
|
# Check @ARGV and the list of hardlinked files we have explicity |
| 454 |
|
|
# dumped to see if we have dumped this file or not |
| 455 |
|
|
# |
| 456 |
|
|
my $done = 0; |
| 457 |
|
|
my $name = $hdr->{linkname}; |
| 458 |
|
|
$name =~ s{^\./}{/}; |
| 459 |
|
|
if ( $HardLinkExtraFiles{$name} ) { |
| 460 |
|
|
$done = 1; |
| 461 |
|
|
} else { |
| 462 |
|
|
foreach my $arg ( @ARGV ) { |
| 463 |
|
|
$arg =~ s{^\./+}{/}; |
| 464 |
|
|
$arg =~ s{/+$}{}; |
| 465 |
|
|
$done = 1 if ( $name eq $arg || $name =~ /^\Q$arg\// ); |
| 466 |
|
|
} |
| 467 |
|
|
} |
| 468 |
|
|
if ( $done ) { |
| 469 |
|
|
# |
| 470 |
|
|
# Target file will be or was written, so just remember |
| 471 |
|
|
# the hardlink so we can dump it later. |
| 472 |
|
|
# |
| 473 |
|
|
push(@HardLinks, $hdr); |
| 474 |
|
|
$SpecialCnt++; |
| 475 |
|
|
} else { |
| 476 |
|
|
# |
| 477 |
|
|
# Have to dump the original file. Just call the top-level |
| 478 |
|
|
# routine, so that we save the hassle of dealing with |
| 479 |
|
|
# mangling, merging and attributes. |
| 480 |
|
|
# |
| 481 |
|
|
$HardLinkExtraFiles{$hdr->{linkname}} = 1; |
| 482 |
|
|
archiveWrite($fh, $hdr->{linkname}, $hdr->{name}); |
| 483 |
|
|
} |
| 484 |
|
|
} elsif ( $hdr->{type} == BPC_FTYPE_SYMLINK ) { |
| 485 |
|
|
# |
| 486 |
|
|
# Symbolic link: read the symbolic link contents into the header |
| 487 |
|
|
# and write the header. |
| 488 |
|
|
# |
| 489 |
|
|
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, $hdr->{compress}); |
| 490 |
|
|
if ( !defined($f) ) { |
| 491 |
|
|
print(STDERR "Unable to open symlink file $hdr->{fullPath}\n"); |
| 492 |
|
|
$ErrorCnt++; |
| 493 |
|
|
return; |
| 494 |
|
|
} |
| 495 |
|
|
my $data; |
| 496 |
|
|
while ( $f->read(\$data, $BufSize) > 0 ) { |
| 497 |
|
|
$hdr->{linkname} .= $data; |
| 498 |
|
|
} |
| 499 |
|
|
$f->close; |
| 500 |
|
|
$hdr->{size} = 0; |
| 501 |
|
|
TarWriteFileInfo($fh, $hdr); |
| 502 |
|
|
$SpecialCnt++; |
| 503 |
|
|
} elsif ( $hdr->{type} == BPC_FTYPE_CHARDEV |
| 504 |
|
|
|| $hdr->{type} == BPC_FTYPE_BLOCKDEV |
| 505 |
|
|
|| $hdr->{type} == BPC_FTYPE_FIFO ) { |
| 506 |
|
|
# |
| 507 |
|
|
# Special files: for char and block special we read the |
| 508 |
|
|
# major and minor numbers from a plain file. |
| 509 |
|
|
# |
| 510 |
|
|
if ( $hdr->{type} != BPC_FTYPE_FIFO ) { |
| 511 |
|
|
my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, |
| 512 |
|
|
$hdr->{compress}); |
| 513 |
|
|
my $data; |
| 514 |
|
|
if ( !defined($f) || $f->read(\$data, $BufSize) < 0 ) { |
| 515 |
|
|
print(STDERR "Unable to open/read char/block special file" |
| 516 |
|
|
. " $hdr->{fullPath}\n"); |
| 517 |
|
|
$f->close if ( defined($f) ); |
| 518 |
|
|
$ErrorCnt++; |
| 519 |
|
|
return; |
| 520 |
|
|
} |
| 521 |
|
|
$f->close; |
| 522 |
|
|
if ( $data =~ /(\d+),(\d+)/ ) { |
| 523 |
|
|
$hdr->{devmajor} = $1; |
| 524 |
|
|
$hdr->{devminor} = $2; |
| 525 |
|
|
} |
| 526 |
|
|
} |
| 527 |
|
|
$hdr->{size} = 0; |
| 528 |
|
|
TarWriteFileInfo($fh, $hdr); |
| 529 |
|
|
$SpecialCnt++; |
| 530 |
|
|
} else { |
| 531 |
|
|
print(STDERR "Got unknown type $hdr->{type} for $hdr->{name}\n"); |
| 532 |
|
|
$ErrorCnt++; |
| 533 |
|
|
} |
| 534 |
|
|
} |
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