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#============================================================= -*-perl-*- |
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# |
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# BackupPC::View package |
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# |
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# DESCRIPTION |
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# |
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# This library defines a BackupPC::View class for merging of |
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# incremental backups and file attributes. This provides the |
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# caller with a single view of a merged backup, without worrying |
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# about which backup contributes which files. |
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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) 2002-2003 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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package BackupPC::View; |
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|
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use strict; |
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|
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use File::Path; |
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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 Data::Dumper; |
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|
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sub new |
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{ |
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my($class, $bpc, $host, $backups) = @_; |
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my $m = bless { |
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bpc => $bpc, # BackupPC::Lib object |
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host => $host, # host name |
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backups => $backups, # all backups for this host |
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num => -1, # backup number |
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idx => -1, # index into backups for backup |
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# we are viewing |
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dirPath => undef, # path to current directory |
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dirAttr => undef, # attributes of current directory |
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}, $class; |
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for ( my $i = 0 ; $i < @{$m->{backups}} ; $i++ ) { |
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next if ( defined($m->{backups}[$i]{level}) ); |
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$m->{backups}[$i]{level} = $m->{backups}[$i]{type} eq "incr" ? 1 : 0; |
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} |
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$m->{topDir} = $m->{bpc}->TopDir(); |
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return $m; |
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} |
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|
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sub dirCache |
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{ |
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my($m, $backupNum, $share, $dir) = @_; |
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my($i, $level); |
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|
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#print STDERR "dirCache($backupNum, $share, $dir)\n"; |
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$dir = "/$dir" if ( $dir !~ m{^/} ); |
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$dir =~ s{/+$}{}; |
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return if ( $m->{num} == $backupNum |
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&& $m->{share} eq $share |
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&& defined($m->{dir}) |
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&& $m->{dir} eq $dir ); |
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$m->backupNumCache($backupNum) if ( $m->{num} != $backupNum ); |
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return if ( $m->{idx} < 0 ); |
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|
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$m->{files} = {}; |
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$level = $m->{backups}[$m->{idx}]{level} + 1; |
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|
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# |
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# Remember the requested share and dir |
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# |
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$m->{share} = $share; |
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$m->{dir} = $dir; |
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|
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# |
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# merge backups, starting at the requested one, and working |
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# backwards until we get to level 0. |
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# |
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$m->{mergeNums} = []; |
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for ( $i = $m->{idx} ; $level > 0 && $i >= 0 ; $i-- ) { |
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#print(STDERR "Do $i ($m->{backups}[$i]{noFill},$m->{backups}[$i]{level})\n"); |
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# |
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# skip backups with the same or higher level |
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# |
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next if ( $m->{backups}[$i]{level} >= $level ); |
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|
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$level = $m->{backups}[$i]{level}; |
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$backupNum = $m->{backups}[$i]{num}; |
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push(@{$m->{mergeNums}}, $backupNum); |
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my $mangle = $m->{backups}[$i]{mangle}; |
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my $compress = $m->{backups}[$i]{compress}; |
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my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/"; |
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my $sharePathM; |
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if ( $mangle ) { |
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$sharePathM = $m->{bpc}->fileNameEltMangle($share) |
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. $m->{bpc}->fileNameMangle($dir); |
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} else { |
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$sharePathM = $share . $dir; |
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} |
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$path .= $sharePathM; |
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#print(STDERR "Opening $path (share=$share)\n"); |
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if ( !opendir(DIR, $path) ) { |
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if ( $i == $m->{idx} ) { |
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# |
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# Oops, directory doesn't exist. |
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# |
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$m->{files} = undef; |
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return; |
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} |
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next; |
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} |
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my @dir = readdir(DIR); |
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closedir(DIR); |
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my $attr; |
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if ( $mangle ) { |
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$attr = BackupPC::Attrib->new({ compress => $compress }); |
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if ( -f $attr->fileName($path) && !$attr->read($path) ) { |
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$m->{error} = "Can't read attribute file in $path"; |
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$attr = undef; |
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} |
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} |
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foreach my $file ( @dir ) { |
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$file = $1 if ( $file =~ /(.*)/ ); |
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my $fileUM = $file; |
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$fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle ); |
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#print(STDERR "Doing $fileUM\n"); |
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# |
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# skip special files |
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# |
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next if ( defined($m->{files}{$fileUM}) |
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|| $file eq ".." |
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|| $file eq "." |
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|| $mangle && $file eq "attrib" ); |
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# |
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# skip directories in earlier backups (each backup always |
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# has the complete directory tree). |
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# |
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my @s = stat("$path/$file"); |
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next if ( $i < $m->{idx} && -d _ ); |
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if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) { |
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$m->{files}{$fileUM} = $a; |
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$attr->set($fileUM, undef); |
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} else { |
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# |
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# Very expensive in the non-attribute case when compresseion |
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# is on. We have to stat the file and read compressed files |
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# to determine their size. |
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# |
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$m->{files}{$fileUM} = { |
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type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE, |
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mode => $s[2], |
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uid => $s[4], |
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gid => $s[5], |
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size => -f _ ? $s[7] : 0, |
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mtime => $s[9], |
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}; |
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if ( $compress && -f _ ) { |
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# |
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# Compute the correct size by reading the whole file |
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# |
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my $f = BackupPC::FileZIO->open("$path/$file", |
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0, $compress); |
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if ( !defined($f) ) { |
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$m->{error} = "Can't open $path/$file"; |
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} else { |
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my($data, $size); |
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while ( $f->read(\$data, 65636 * 8) > 0 ) { |
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$size += length($data); |
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} |
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$f->close; |
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$m->{files}{$fileUM}{size} = $size; |
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} |
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} |
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} |
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$m->{files}{$fileUM}{relPath} = "$dir/$fileUM"; |
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$m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file"; |
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$m->{files}{$fileUM}{fullPath} = "$path/$file"; |
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$m->{files}{$fileUM}{backupNum} = $backupNum; |
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$m->{files}{$fileUM}{compress} = $compress; |
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$m->{files}{$fileUM}{nlink} = $s[3]; |
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$m->{files}{$fileUM}{inode} = $s[1]; |
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} |
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# |
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# Also include deleted files |
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# |
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if ( defined($attr) ) { |
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my $a = $attr->get; |
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foreach my $fileUM ( keys(%$a) ) { |
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next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED ); |
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my $file = $fileUM; |
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$file = $m->{bpc}->fileNameMangle($fileUM) if ( $mangle ); |
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$m->{files}{$fileUM} = $a->{$fileUM}; |
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$m->{files}{$fileUM}{relPath} = "$dir/$fileUM"; |
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$m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file"; |
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$m->{files}{$fileUM}{fullPath} = "$path/$file"; |
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$m->{files}{$fileUM}{backupNum} = $backupNum; |
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$m->{files}{$fileUM}{compress} = $compress; |
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$m->{files}{$fileUM}{nlink} = 0; |
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$m->{files}{$fileUM}{inode} = 0; |
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} |
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} |
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} |
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# |
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# Prune deleted files |
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# |
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foreach my $file ( keys(%{$m->{files}}) ) { |
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next if ( $m->{files}{$file}{type} != BPC_FTYPE_DELETED ); |
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delete($m->{files}{$file}); |
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} |
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#print STDERR "Returning:\n", Dumper($m->{files}); |
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} |
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|
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# |
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# Return list of shares for this backup |
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# |
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sub shareList |
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{ |
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my($m, $backupNum) = @_; |
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my @shareList; |
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|
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$m->backupNumCache($backupNum) if ( $m->{num} != $backupNum ); |
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return if ( $m->{idx} < 0 ); |
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|
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my $mangle = $m->{backups}[$m->{idx}]{mangle}; |
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my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/"; |
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return if ( !opendir(DIR, $path) ); |
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my @dir = readdir(DIR); |
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closedir(DIR); |
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foreach my $file ( @dir ) { |
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$file = $1 if ( $file =~ /(.*)/ ); |
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next if ( $file eq "attrib" && $mangle |
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|| $file eq "." |
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|| $file eq ".." ); |
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my $fileUM = $file; |
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$fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle ); |
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push(@shareList, $fileUM); |
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} |
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$m->{dir} = undef; |
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return @shareList; |
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} |
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|
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sub backupNumCache |
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{ |
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my($m, $backupNum) = @_; |
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|
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if ( $m->{num} != $backupNum ) { |
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my $i; |
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for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) { |
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last if ( $m->{backups}[$i]{num} == $backupNum ); |
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} |
| 271 |
if ( $i >= @{$m->{backups}} ) { |
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$m->{idx} = -1; |
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return; |
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} |
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$m->{num} = $backupNum; |
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$m->{idx} = $i; |
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} |
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} |
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|
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# |
| 281 |
# Return the attributes of a specific file |
| 282 |
# |
| 283 |
sub fileAttrib |
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{ |
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my($m, $backupNum, $share, $path) = @_; |
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|
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#print(STDERR "fileAttrib($backupNum, $share, $path)\n"); |
| 288 |
if ( $path =~ s{(.*)/+(.+)}{$1} ) { |
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my $file = $2; |
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$m->dirCache($backupNum, $share, $path); |
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return $m->{files}{$file}; |
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} else { |
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#print STDERR "Got empty $path\n"; |
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$m->dirCache($backupNum, "", ""); |
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my $attr = $m->{files}{$share}; |
| 296 |
return if ( !defined($attr) ); |
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$attr->{relPath} = "/"; |
| 298 |
return $attr; |
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} |
| 300 |
} |
| 301 |
|
| 302 |
# |
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# Return the contents of a directory |
| 304 |
# |
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sub dirAttrib |
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{ |
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my($m, $backupNum, $share, $dir) = @_; |
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|
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$m->dirCache($backupNum, $share, $dir); |
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return $m->{files}; |
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} |
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|
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# |
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# Return a listref of backup numbers that are merged to create this view |
| 315 |
# |
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sub mergeNums |
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{ |
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my($m) = @_; |
| 319 |
|
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return $m->{mergeNums}; |
| 321 |
} |
| 322 |
|
| 323 |
# |
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# Return a list of backup indexes for which the directory exists |
| 325 |
# |
| 326 |
sub backupList |
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{ |
| 328 |
my($m, $share, $dir) = @_; |
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my($i, @backupList); |
| 330 |
|
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$dir = "/$dir" if ( $dir !~ m{^/} ); |
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$dir =~ s{/+$}{}; |
| 333 |
|
| 334 |
for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) { |
| 335 |
my $backupNum = $m->{backups}[$i]{num}; |
| 336 |
my $mangle = $m->{backups}[$i]{mangle}; |
| 337 |
my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/"; |
| 338 |
my $sharePathM; |
| 339 |
if ( $mangle ) { |
| 340 |
$sharePathM = $m->{bpc}->fileNameEltMangle($share) |
| 341 |
. $m->{bpc}->fileNameMangle($dir); |
| 342 |
} else { |
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$sharePathM = $share . $dir; |
| 344 |
} |
| 345 |
$path .= $sharePathM; |
| 346 |
next if ( !-d $path ); |
| 347 |
push(@backupList, $i); |
| 348 |
} |
| 349 |
return @backupList; |
| 350 |
} |
| 351 |
|
| 352 |
# |
| 353 |
# Return the history of all backups for a particular directory |
| 354 |
# |
| 355 |
sub dirHistory |
| 356 |
{ |
| 357 |
my($m, $share, $dir) = @_; |
| 358 |
my($i, $level); |
| 359 |
my $files = {}; |
| 360 |
|
| 361 |
$dir = "/$dir" if ( $dir !~ m{^/} ); |
| 362 |
$dir =~ s{/+$}{}; |
| 363 |
|
| 364 |
# |
| 365 |
# merge backups, starting at the first one, and working |
| 366 |
# forward. |
| 367 |
# |
| 368 |
for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) { |
| 369 |
$level = $m->{backups}[$i]{level}; |
| 370 |
my $backupNum = $m->{backups}[$i]{num}; |
| 371 |
my $mangle = $m->{backups}[$i]{mangle}; |
| 372 |
my $compress = $m->{backups}[$i]{compress}; |
| 373 |
my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/"; |
| 374 |
my $sharePathM; |
| 375 |
if ( $mangle ) { |
| 376 |
$sharePathM = $m->{bpc}->fileNameEltMangle($share) |
| 377 |
. $m->{bpc}->fileNameMangle($dir); |
| 378 |
} else { |
| 379 |
$sharePathM = $share . $dir; |
| 380 |
} |
| 381 |
$path .= $sharePathM; |
| 382 |
#print(STDERR "Opening $path (share=$share)\n"); |
| 383 |
if ( !opendir(DIR, $path) ) { |
| 384 |
# |
| 385 |
# Oops, directory doesn't exist. |
| 386 |
# |
| 387 |
next; |
| 388 |
} |
| 389 |
my @dir = readdir(DIR); |
| 390 |
closedir(DIR); |
| 391 |
my $attr; |
| 392 |
if ( $mangle ) { |
| 393 |
$attr = BackupPC::Attrib->new({ compress => $compress }); |
| 394 |
if ( -f $attr->fileName($path) && !$attr->read($path) ) { |
| 395 |
$m->{error} = "Can't read attribute file in $path"; |
| 396 |
$attr = undef; |
| 397 |
} |
| 398 |
} |
| 399 |
foreach my $file ( @dir ) { |
| 400 |
$file = $1 if ( $file =~ /(.*)/ ); |
| 401 |
my $fileUM = $file; |
| 402 |
$fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle ); |
| 403 |
#print(STDERR "Doing $fileUM\n"); |
| 404 |
# |
| 405 |
# skip special files |
| 406 |
# |
| 407 |
next if ( $file eq ".." |
| 408 |
|| $file eq "." |
| 409 |
|| $mangle && $file eq "attrib" |
| 410 |
|| defined($files->{$fileUM}[$i]) ); |
| 411 |
my @s = stat("$path/$file"); |
| 412 |
if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) { |
| 413 |
$files->{$fileUM}[$i] = $a; |
| 414 |
$attr->set($fileUM, undef); |
| 415 |
} else { |
| 416 |
# |
| 417 |
# Very expensive in the non-attribute case when compresseion |
| 418 |
# is on. We have to stat the file and read compressed files |
| 419 |
# to determine their size. |
| 420 |
# |
| 421 |
$files->{$fileUM}[$i] = { |
| 422 |
type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE, |
| 423 |
mode => $s[2], |
| 424 |
uid => $s[4], |
| 425 |
gid => $s[5], |
| 426 |
size => -f _ ? $s[7] : 0, |
| 427 |
mtime => $s[9], |
| 428 |
}; |
| 429 |
if ( $compress && -f _ ) { |
| 430 |
# |
| 431 |
# Compute the correct size by reading the whole file |
| 432 |
# |
| 433 |
my $f = BackupPC::FileZIO->open("$path/$file", |
| 434 |
0, $compress); |
| 435 |
if ( !defined($f) ) { |
| 436 |
$m->{error} = "Can't open $path/$file"; |
| 437 |
} else { |
| 438 |
my($data, $size); |
| 439 |
while ( $f->read(\$data, 65636 * 8) > 0 ) { |
| 440 |
$size += length($data); |
| 441 |
} |
| 442 |
$f->close; |
| 443 |
$files->{$fileUM}[$i]{size} = $size; |
| 444 |
} |
| 445 |
} |
| 446 |
} |
| 447 |
$files->{$fileUM}[$i]{relPath} = "$dir/$fileUM"; |
| 448 |
$files->{$fileUM}[$i]{sharePathM} = "$sharePathM/$file"; |
| 449 |
$files->{$fileUM}[$i]{fullPath} = "$path/$file"; |
| 450 |
$files->{$fileUM}[$i]{backupNum} = $backupNum; |
| 451 |
$files->{$fileUM}[$i]{compress} = $compress; |
| 452 |
$files->{$fileUM}[$i]{nlink} = $s[3]; |
| 453 |
$files->{$fileUM}[$i]{inode} = $s[1]; |
| 454 |
} |
| 455 |
|
| 456 |
# |
| 457 |
# Merge old backups. Don't merge directories from old |
| 458 |
# backups because every backup has an accurate directory |
| 459 |
# tree. |
| 460 |
# |
| 461 |
for ( my $k = $i - 1 ; $level > 0 && $k >= 0 ; $k-- ) { |
| 462 |
next if ( $m->{backups}[$k]{level} >= $level ); |
| 463 |
$level = $m->{backups}[$k]{level}; |
| 464 |
foreach my $fileUM ( keys(%$files) ) { |
| 465 |
next if ( !defined($files->{$fileUM}[$k]) |
| 466 |
|| defined($files->{$fileUM}[$i]) |
| 467 |
|| $files->{$fileUM}[$k]{type} == BPC_FTYPE_DIR ); |
| 468 |
$files->{$fileUM}[$i] = $files->{$fileUM}[$k]; |
| 469 |
} |
| 470 |
} |
| 471 |
|
| 472 |
# |
| 473 |
# Finally, remove deleted files |
| 474 |
# |
| 475 |
if ( defined($attr) ) { |
| 476 |
my $a = $attr->get; |
| 477 |
foreach my $fileUM ( keys(%$a) ) { |
| 478 |
next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED ); |
| 479 |
$files->{$fileUM}[$i] = undef if ( defined($files->{$fileUM}) ); |
| 480 |
} |
| 481 |
} |
| 482 |
} |
| 483 |
#print STDERR "Returning:\n", Dumper($files); |
| 484 |
return $files; |
| 485 |
} |
| 486 |
|
| 487 |
|
| 488 |
# |
| 489 |
# Do a recursive find starting at the given path (either a file |
| 490 |
# or directory). The callback function $callback is called on each |
| 491 |
# file and directory. The function arguments are the attrs hashref, |
| 492 |
# and additional callback arguments. The search is depth-first if |
| 493 |
# depth is set. Returns -1 if $path does not exist. |
| 494 |
# |
| 495 |
sub find |
| 496 |
{ |
| 497 |
my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_; |
| 498 |
|
| 499 |
#print(STDERR "find: got $backupNum, $share, $path\n"); |
| 500 |
# |
| 501 |
# First call the callback on the given $path |
| 502 |
# |
| 503 |
my $attr = $m->fileAttrib($backupNum, $share, $path); |
| 504 |
return -1 if ( !defined($attr) ); |
| 505 |
&$callback($attr, @callbackArgs); |
| 506 |
return if ( $attr->{type} != BPC_FTYPE_DIR ); |
| 507 |
|
| 508 |
# |
| 509 |
# Now recurse into subdirectories |
| 510 |
# |
| 511 |
$m->findRecurse($backupNum, $share, $path, $depth, |
| 512 |
$callback, @callbackArgs); |
| 513 |
} |
| 514 |
|
| 515 |
# |
| 516 |
# Same as find(), except the callback is not called on the current |
| 517 |
# $path, only on the contents of $path. So if $path is a file then |
| 518 |
# no callback or recursion occurs. |
| 519 |
# |
| 520 |
sub findRecurse |
| 521 |
{ |
| 522 |
my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_; |
| 523 |
|
| 524 |
my $attr = $m->dirAttrib($backupNum, $share, $path); |
| 525 |
return if ( !defined($attr) ); |
| 526 |
foreach my $file ( sort(keys(%$attr)) ) { |
| 527 |
&$callback($attr->{$file}, @callbackArgs); |
| 528 |
next if ( !$depth || $attr->{$file}{type} != BPC_FTYPE_DIR ); |
| 529 |
# |
| 530 |
# For depth-first, recurse as we hit each directory |
| 531 |
# |
| 532 |
$m->findRecurse($backupNum, $share, "$path/$file", $depth, |
| 533 |
$callback, @callbackArgs); |
| 534 |
} |
| 535 |
if ( !$depth ) { |
| 536 |
# |
| 537 |
# For non-depth, recurse directories after we finish current dir |
| 538 |
# |
| 539 |
foreach my $file ( keys(%{$attr}) ) { |
| 540 |
next if ( $attr->{$file}{type} != BPC_FTYPE_DIR ); |
| 541 |
$m->findRecurse($backupNum, $share, "$path/$file", $depth, |
| 542 |
$callback, @callbackArgs); |
| 543 |
} |
| 544 |
} |
| 545 |
} |
| 546 |
|
| 547 |
1; |
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