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|
#============================================================= -*-perl-*-
#
# BackupPC::View package
#
# DESCRIPTION
#
# This library defines a BackupPC::View class for merging of
# incremental backups and file attributes. This provides the
# caller with a single view of a merged backup, without worrying
# about which backup contributes which files.
#
# AUTHOR
# Craig Barratt <cbarratt@users.sourceforge.net>
#
# COPYRIGHT
# Copyright (C) 2002-2020 Craig Barratt
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
#========================================================================
#
# Version 4.4.0, released 20 Jun 2020.
#
# See http://backuppc.sourceforge.net.
#
#========================================================================
package BackupPC::View;
use strict;
use File::Path;
use BackupPC::Lib;
use BackupPC::XS qw( :all );
use BackupPC::DirOps qw( :BPC_DT_ALL );
use Data::Dumper;
use Encode qw/from_to/;
sub new
{
my($class, $bpc, $host, $backups, $options) = @_;
my $m = bless {
bpc => $bpc, # BackupPC::Lib object
host => $host, # host name
backups => $backups, # all backups for this host
num => -1, # backup number
idx => -1, # index into backups for backup
# we are viewing
dirPath => undef, # path to current directory
dirAttr => undef, # attributes of current directory
dirOpts => $options, # $options is a hash of file attributes we need:
# type, inode, or nlink. If set, these parameters
# are added to the returned hash.
# See BackupPC::DirOps::dirRead().
error => [],
}, $class;
$m->{topDir} = $m->{bpc}->TopDir();
return $m;
}
#
# Check if a directory exists in the given backup.
# This is only for >= 4.x backups.
#
sub dirNotDeleted
{
my($m, $idx, $share, $dir) = @_;
my $last = 0;
#
# We need to look up up each level until we find an
# attrib file that exists.
#
my $backupNum = $m->{backups}[$idx]{num};
my $compress = $m->{backups}[$idx]{compress};
my $topPath = "$m->{topDir}/pc/$m->{host}/$backupNum/";
while ( !$last ) {
my($file, $p);
if ( $dir =~ m{(.*)/(.*)} ) {
#
# Normal subdirectory or top-level directory
#
$dir = $1;
$file = $2;
$p = $topPath . $m->{bpc}->fileNameEltMangle($share);
$p .= $m->{bpc}->fileNameMangle($dir) if ( length($dir) );
} else {
#
# Check that the share exists in this backup;
# if not then any subdirectory must be empty.
#
$p = $topPath;
$file = $share;
$last = 1;
}
next if ( !-d $p || !defined(BackupPC::DirOps::dirContainsAttrib($m->{bpc}, $dir)) );
my $attr = BackupPC::XS::Attrib::new($compress);
if ( !$attr->read($p) ) {
push(@{$m->{error}}, "Can't read attribute file in $p: " . $attr->errStr());
next;
}
my $a = $attr->get($file);
return 0 if ( defined($a) && $a->{type} != BPC_FTYPE_DIR );
return 1;
}
return 1;
}
sub hardLinkGet
{
my($m, $a, $i) = @_;
if ( !$m->{attribCache}[$i] ) {
$m->{attribCache}[$i] =
BackupPC::XS::AttribCache::new($m->{host}, $m->{backups}[$i]{num}, "", $m->{backups}[$i]{compress});
}
my $newAttrib = $m->{attribCache}[$i]->getInode($a->{inode});
return $a if ( !$newAttrib );
$newAttrib = {%$newAttrib};
$newAttrib->{name} = $a->{name};
return $newAttrib;
}
sub dirCache
{
my($m, $backupNum, $share, $dir) = @_;
my($i, $level);
#print STDERR "dirCache($backupNum, $share, $dir)\n";
$dir = "/$dir" if ( $dir !~ m{^/} );
$dir =~ s{/+$}{};
return if ( $m->{num} == $backupNum
&& $m->{share} eq $share
&& defined($m->{dir})
&& $m->{dir} eq $dir );
$m->backupNumCache($backupNum) if ( $m->{num} != $backupNum );
return if ( $m->{idx} < 0 );
$m->{files} = {};
$level = $m->{backups}[$m->{idx}]{level} + 1;
#
# Remember the requested share and dir
#
$m->{share} = $share;
$m->{dir} = $dir;
if ( $m->{backups}[$m->{idx}]{version} < 4 ) {
#
# Pre-4.x backup: merge backups, starting at the requested one,
# and working backwards merging each backup of lower level
# until we finish with a level 0 backup (ie: a full).
#
# In pre-4.x backups the full directory tree exists for all
# backups, even incrementals.
#
$m->{mergeNums} = [];
for ( $i = $m->{idx} ; $level > 0 && $i >= 0 ; $i-- ) {
#print(STDERR "Do $i ($m->{backups}[$i]{noFill},$m->{backups}[$i]{level})\n");
#
# skip backups with the same or higher level
#
next if ( $m->{backups}[$i]{level} >= $level );
$level = $m->{backups}[$i]{level};
$backupNum = $m->{backups}[$i]{num};
push(@{$m->{mergeNums}}, $backupNum);
my $mangle = $m->{backups}[$i]{mangle};
my $compress = $m->{backups}[$i]{compress};
my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
my $legacyCharset = $m->{backups}[$i]{version} < 3.0;
my $sharePathM;
if ( $mangle ) {
$sharePathM = $m->{bpc}->fileNameEltMangle($share) . $m->{bpc}->fileNameMangle($dir);
} else {
$sharePathM = $share . $dir;
}
$path .= $sharePathM;
#print(STDERR "Opening $path (share=$share, mangle=$mangle)\n");
my $dirOpts = {%{$m->{dirOpts} || {}}};
my $attribOpts = {};
if ( $legacyCharset ) {
$dirOpts->{charsetLegacy} = $attribOpts->{charsetLegacy} =
$m->{bpc}->{Conf}{ClientCharsetLegacy} || "iso-8859-1";
}
my $attr;
if ( $mangle ) {
# TODO: removed charset attribOpts - need to do at this level?
$attr = BackupPC::XS::Attrib::new($compress);
if ( !$attr->read($path) ) {
push(@{$m->{error}}, "Can't read attribute file in $path\n");
$attr = undef;
}
}
if ( $attr && length($attr->digest()) ) {
#
# new style V4 attributes - everything is in the attrib file
#
my $idx = 0;
my $a;
while ( 1 ) {
($a, $idx) = $attr->iterate($idx);
last if ( !defined($a) );
my $fileUM = $a->{name};
#
# skip directories in earlier backups (in V3 each backup
# always has the complete directory tree).
#
next if ( $i < $m->{idx} && $a->{type} == BPC_FTYPE_DIR );
#print(STDERR "Adding $fileUM with type $a->{type}\n");
if ( !$m->{files}{$fileUM} ) {
$m->{files}{$fileUM} = $a;
$attr->delete($fileUM);
($m->{files}{$fileUM}{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
if ( length($a->{digest}) ) {
$m->{files}{$fileUM}{fullPath} = $m->{bpc}->MD52Path($a->{digest}, $compress);
} else {
$m->{files}{$fileUM}{fullPath} = "/dev/null";
}
$m->{files}{$fileUM}{backupNum} = $backupNum;
$m->{files}{$fileUM}{compress} = $compress;
}
}
} else {
my $dirInfo = BackupPC::DirOps::dirRead($m->{bpc}, $path, $dirOpts);
if ( !defined($dirInfo) ) {
if ( $i == $m->{idx} ) {
#
# Oops, directory doesn't exist.
#
$m->{files} = undef;
return;
}
next;
}
foreach my $entry ( @$dirInfo ) {
my $file = $1 if ( $entry->{name} =~ /(.*)/s );
my $fileUM = $file;
$fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
#
# skip special files
#
next
if ( defined($m->{files}{$fileUM})
|| $file eq ".."
|| $file eq "."
|| $file eq "backupInfo"
|| $file eq "refCnt"
|| $mangle && $file =~ /^attrib/ );
if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) {
#
# skip directories in earlier backups (in V3 each backup
# always has the complete directory tree).
#
next if ( $i < $m->{idx} && $a->{type} == BPC_FTYPE_DIR );
#print(STDERR "Adding $fileUM with type $a->{type}\n");
$m->{files}{$fileUM} ||= $a;
$attr->delete($fileUM);
} else {
#print(STDERR "No attrib; determining attribs of $fileUM\n");
#
# Very expensive in the non-attribute case when compresseion
# is on. We have to stat the file and read compressed files
# to determine their size.
#
my $realPath = "$path/$file";
from_to($realPath, "utf8", $attribOpts->{charsetLegacy})
if ( $attribOpts->{charsetLegacy} ne "" );
my @s = stat($realPath);
next if ( $i < $m->{idx} && -d _ );
$m->{files}{$fileUM} = {
type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE,
mode => $s[2],
uid => $s[4],
gid => $s[5],
size => -f _ ? $s[7] : 0,
mtime => $s[9],
};
if ( $compress && -f _ ) {
#
# Compute the correct size by reading the whole file
#
my $f = BackupPC::XS::FileZIO::open($realPath, 0, $compress);
if ( !defined($f) ) {
push(@{$m->{error}}, "Can't open $realPath");
} else {
my($data, $size);
while ( $f->read(\$data, 65636 * 8) > 0 ) {
$size += length($data);
}
$f->close;
$m->{files}{$fileUM}{size} = $size;
}
}
}
($m->{files}{$fileUM}{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
($m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file") =~ s{//+}{/}g;
($m->{files}{$fileUM}{fullPath} = "$path/$file") =~ s{//+}{/}g;
from_to($m->{files}{$fileUM}{fullPath}, "utf8", $attribOpts->{charsetLegacy})
if ( $attribOpts->{charsetLegacy} ne "" );
$m->{files}{$fileUM}{backupNum} = $backupNum;
$m->{files}{$fileUM}{compress} = $compress;
$m->{files}{$fileUM}{nlink} = $entry->{nlink}
if ( $m->{dirOpts}{nlink} );
$m->{files}{$fileUM}{inode} = $entry->{inode}
if ( $m->{dirOpts}{inode} );
}
}
#
# Also include deleted files
#
if ( defined($attr) ) {
my $a = $attr->get;
foreach my $fileUM ( keys(%$a) ) {
next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED );
my $file = $fileUM;
$file = $m->{bpc}->fileNameMangle($fileUM) if ( $mangle );
$m->{files}{$fileUM} = $a->{$fileUM};
$m->{files}{$fileUM}{relPath} = "$dir/$fileUM";
$m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file";
$m->{files}{$fileUM}{fullPath} = "$path/$file";
from_to($m->{files}{$fileUM}{fullPath}, "utf8", $attribOpts->{charsetLegacy})
if ( $attribOpts->{charsetLegacy} ne "" );
$m->{files}{$fileUM}{backupNum} = $backupNum;
$m->{files}{$fileUM}{compress} = $compress;
$m->{files}{$fileUM}{nlink} = 0;
$m->{files}{$fileUM}{inode} = 0;
}
}
#
# Prune deleted files
#
foreach my $file ( keys(%{$m->{files}}) ) {
next if ( $m->{files}{$file}{type} != BPC_FTYPE_DELETED );
delete($m->{files}{$file});
}
}
} else {
#
# 4.x+ backup: merge backups, starting at the first filled backup
# at or later than the one we are viewing (most commonly the last)
# and working backwards until we finish with the requested backup.
#
# In 4.x+ backups the full directory tree exists in the last backup.
# Prior backups might be filled to improve viewing speed. Non-filled backup
# trees only have directories where some part of the backup has changed.
#
# First find the oldest filled backup at or after idx.
#
my $oldestFilled = @{$m->{backups}} - 1;
for ( $i = $m->{idx} ; $i < @{$m->{backups}} ; $i++ ) {
next if ( $m->{backups}[$i]{noFill} );
$oldestFilled = $i;
last;
}
$m->{mergeNums} = [];
my $hardlinks = {};
for ( $i = $oldestFilled ; $i >= $m->{idx} ; $i-- ) {
#print(STDERR "Do $i ($m->{backups}[$i]{noFill},$m->{backups}[$i]{level})\n");
$backupNum = $m->{backups}[$i]{num};
push(@{$m->{mergeNums}}, $backupNum);
my $mangle = $m->{backups}[$i]{mangle};
my $compress = $m->{backups}[$i]{compress};
my $topPath = "$m->{topDir}/pc/$m->{host}/$backupNum/";
my $sharePathM = $m->{bpc}->fileNameEltMangle($share) . $m->{bpc}->fileNameMangle($dir);
my $path = $topPath . $sharePathM;
#print(STDERR "Opening $path (share=$share, mangle=$mangle)\n");
my $dirOpts = {%{$m->{dirOpts} || {}}};
my $attribOpts = {compress => $compress};
if ( !-d $path && $i == $oldestFilled ) {
#
# if this is the last backup then the directory is empty
#
#print(STDERR "Path $path isn't a directory\n");
next;
}
my $attr = BackupPC::XS::Attrib::new($compress);
my $attrAll;
if ( !$attr->read($path, "attrib") ) {
if ( -f "$path/attrib" ) {
push(@{$m->{error}}, "Can't read attribute file in $path\n");
}
} else {
#print(STDERR "Got attr\n");
my $idx = 0;
my $a;
while ( 1 ) {
($a, $idx) = $attr->iterate($idx);
last if ( !defined($a) );
my $fileUM = $a->{name};
if ( $a->{type} == BPC_FTYPE_DELETED ) {
#print(STDERR "deleting $fileUM\n");
delete($m->{files}{$fileUM});
delete($hardlinks->{$fileUM});
next;
}
if ( $a->{nlinks} > 0 ) {
$a = $m->hardLinkGet($a, $i);
$hardlinks->{$fileUM} = 1;
}
$m->{files}{$fileUM} = $a;
($m->{files}{$fileUM}{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
if ( length($a->{digest}) ) {
$m->{files}{$fileUM}{fullPath} = $m->{bpc}->MD52Path($a->{digest}, $compress);
} else {
$m->{files}{$fileUM}{fullPath} = "/dev/null";
}
$m->{files}{$fileUM}{backupNum} = $backupNum;
$m->{files}{$fileUM}{compress} = $compress;
$m->{files}{$fileUM}{inode} = $a->{inode};
}
}
#
# Update any inode information specific to this backup
# for hardlinks in this directory
#
foreach my $f ( keys(%$hardlinks) ) {
next if ( !$m->{files}{$f} || $m->{files}{$f}{backupNum} == $backupNum );
my $a = $m->hardLinkGet($m->{files}{$f}, $i);
next if ( $a == $m->{files}{$f} );
$m->{files}{$f} = {%{$m->{files}{$f}}, %$a};
if ( length($a->{digest}) ) {
$m->{files}{$f}{fullPath} = $m->{bpc}->MD52Path($a->{digest}, $compress);
}
$m->{files}{$f}{backupNum} = $backupNum;
$m->{files}{$f}{inode} = $a->{inode};
}
}
}
#print STDERR "Returning:\n", Dumper($m->{files}) if ( length($dir) );
}
#
# Return list of shares for this backup
#
sub shareList
{
my($m, $backupNum) = @_;
my @shareList;
$m->backupNumCache($backupNum) if ( $m->{num} != $backupNum );
return if ( $m->{idx} < 0 );
if ( $m->{backups}[$m->{idx}]{version} < 4 ) {
my $mangle = $m->{backups}[$m->{idx}]{mangle};
my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
return if ( !opendir(DIR, $path) );
my @dir = readdir(DIR);
closedir(DIR);
foreach my $file ( @dir ) {
$file = $1 if ( $file =~ /(.*)/s );
next
if ( $file =~ /^attrib/ && $mangle
|| $file eq "."
|| $file eq ".."
|| $file eq "backupInfo"
|| $file eq "inode"
|| $file eq "refCnt" );
my $fileUM = $file;
$fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
push(@shareList, $fileUM);
}
$m->{dir} = undef;
} else {
#
# For 4.x we use a view with share "" to see the shares
# for this backup
#
$m->dirCache($backupNum, "", "");
@shareList = sort(keys(%{$m->{files}}));
}
return @shareList;
}
sub backupNumCache
{
my($m, $backupNum) = @_;
my $i;
return if ( $m->{num} == $backupNum );
for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
last if ( $m->{backups}[$i]{num} == $backupNum );
}
if ( $i >= @{$m->{backups}} ) {
$m->{idx} = -1;
return;
}
$m->{num} = $backupNum;
$m->{idx} = $i;
}
#
# Return the attributes of a specific file
#
sub fileAttrib
{
my($m, $backupNum, $share, $path) = @_;
#print(STDERR "fileAttrib($backupNum, $share, $path)\n");
if ( $path =~ s{(.*)/+(.+)}{$1}s ) {
my $file = $2;
$m->dirCache($backupNum, $share, $path);
return $m->{files}{$file};
} else {
#print STDERR "Got empty $path\n";
$m->dirCache($backupNum, "", "");
my $attr = $m->{files}{$share};
return if ( !defined($attr) );
$attr->{relPath} = "/";
return $attr;
}
}
#
# Return the contents of a directory
#
sub dirAttrib
{
my($m, $backupNum, $share, $dir) = @_;
$m->dirCache($backupNum, $share, $dir);
return $m->{files};
}
#
# Return a listref of backup numbers that are merged to create this view
#
sub mergeNums
{
my($m) = @_;
return $m->{mergeNums};
}
#
# Return a list of backup indexes for which the directory exists
#
sub backupList
{
my($m, $share, $dir) = @_;
my($i, @backupList);
my $exist;
$dir = "/$dir" if ( $dir !~ m{^/} );
$dir =~ s{/+$}{};
for ( $i = @{$m->{backups}} - 1 ; $i >= 0 ; $i-- ) {
my $backupNum = $m->{backups}[$i]{num};
my $mangle = $m->{backups}[$i]{mangle};
my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
my $sharePathM;
if ( $mangle ) {
$sharePathM = $m->{bpc}->fileNameEltMangle($share) . $m->{bpc}->fileNameMangle($dir);
} else {
$sharePathM = $share . $dir;
}
$path .= $sharePathM;
if ( $m->{backups}[$i]{version} < 4 ) {
#
# For 3.x backups it is easy - the full directory tree
# exists for every backup
#
next if ( !-d $path );
unshift(@backupList, $i);
} else {
if ( $i == @{$m->{backups}} - 1 || !$exist ) {
#
# The last backup is complete, so just test whether
# the directory exists. Similarly, if the directory
# doesn't exist in a more recent backup, then we can
# do the same test.
#
if ( -d $path ) {
unshift(@backupList, $i);
$exist = 1;
}
next;
}
#
# We need to check if this directory or a
# parent has the delete attribute
#
if ( $m->dirNotDeleted($i, $share, $dir) ) {
$exist = 1;
unshift(@backupList, $i);
}
}
}
return @backupList;
}
#
# Return the history of all backups for a particular directory
#
sub dirHistory
{
my($m, $share, $dir) = @_;
my($i, $level);
my $files = {};
my $hardlinks = {};
$dir = "/$dir" if ( $dir !~ m{^/} );
$dir =~ s{/+$}{};
#
# Handle any 3.x backups first. We merge backups, starting at
# the first one, and working forward.
#
for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
$level = $m->{backups}[$i]{level};
my $backupNum = $m->{backups}[$i]{num};
my $mangle = $m->{backups}[$i]{mangle};
my $compress = $m->{backups}[$i]{compress};
my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
my $legacyCharset = $m->{backups}[$i]{version} < 3.0;
my $sharePathM;
last if ( $m->{backups}[$i]{version} >= 4 );
if ( $mangle ) {
$sharePathM = $m->{bpc}->fileNameEltMangle($share) . $m->{bpc}->fileNameMangle($dir);
} else {
$sharePathM = $share . $dir;
}
$path .= $sharePathM;
#print(STDERR "Opening $path (share=$share)\n");
my $dirOpts = {%{$m->{dirOpts} || {}}};
my $attribOpts = {compress => $compress};
if ( $legacyCharset ) {
$dirOpts->{charsetLegacy} = $attribOpts->{charsetLegacy} =
$m->{bpc}->{Conf}{ClientCharsetLegacy} || "iso-8859-1";
}
my $dirInfo = BackupPC::DirOps::dirRead($m->{bpc}, $path, $dirOpts);
if ( !defined($dirInfo) ) {
#
# Oops, directory doesn't exist.
#
next;
}
my $attr;
if ( $mangle ) {
$attr = BackupPC::XS::Attrib::new($compress);
if ( !$attr->read($path) ) {
push(@{$m->{error}}, "Can't read attribute file in $path");
$attr = undef;
}
}
if ( $attr && length($attr->digest()) ) {
#
# new style V4 attributes - everything is in the attrib file
#
my $idx = 0;
my $a;
while ( 1 ) {
($a, $idx) = $attr->iterate($idx);
last if ( !defined($a) );
my $fileUM = $a->{name};
$files->{$fileUM}[$i] = $a;
$attr->delete($fileUM);
($files->{$fileUM}[$i]{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
if ( length($a->{digest}) ) {
$files->{$fileUM}[$i]{fullPath} = $m->{bpc}->MD52Path($a->{digest}, $compress);
} else {
$files->{$fileUM}[$i]{fullPath} = "/dev/null";
}
$files->{$fileUM}[$i]{backupNum} = $backupNum;
$files->{$fileUM}[$i]{compress} = $compress;
}
} else {
foreach my $entry ( @$dirInfo ) {
my $file = $1 if ( $entry->{name} =~ /(.*)/s );
my $fileUM = $file;
$fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
#print(STDERR "Doing $fileUM\n");
#
# skip special files
#
next
if ( $file eq ".."
|| $file eq "."
|| $mangle && $file =~ /^attrib/
|| defined($files->{$fileUM}[$i]) );
my $realPath = "$path/$file";
from_to($realPath, "utf8", $attribOpts->{charsetLegacy})
if ( $attribOpts->{charsetLegacy} ne "" );
my @s = stat($realPath);
if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) {
$files->{$fileUM}[$i] = $a;
$attr->delete($fileUM);
} else {
#
# Very expensive in the non-attribute case when compresseion
# is on. We have to stat the file and read compressed files
# to determine their size.
#
$files->{$fileUM}[$i] = {
type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE,
mode => $s[2],
uid => $s[4],
gid => $s[5],
size => -f _ ? $s[7] : 0,
mtime => $s[9],
};
if ( $compress && -f _ ) {
#
# Compute the correct size by reading the whole file
#
my $f = BackupPC::XS::FileZIO::open("$realPath", 0, $compress);
if ( !defined($f) ) {
push(@{$m->{error}}, "Can't open $path/$file");
} else {
my($data, $size);
while ( $f->read(\$data, 65636 * 8) > 0 ) {
$size += length($data);
}
$f->close;
$files->{$fileUM}[$i]{size} = $size;
}
}
}
($files->{$fileUM}[$i]{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
($files->{$fileUM}[$i]{sharePathM} = "$sharePathM/$file") =~ s{//+}{/}g;
($files->{$fileUM}[$i]{fullPath} = "$path/$file") =~ s{//+}{/}g;
$files->{$fileUM}[$i]{backupNum} = $backupNum;
$files->{$fileUM}[$i]{compress} = $compress;
$files->{$fileUM}[$i]{nlink} = $entry->{nlink}
if ( $m->{dirOpts}{nlink} );
$files->{$fileUM}[$i]{inode} = $entry->{inode}
if ( $m->{dirOpts}{inode} );
}
}
#
# Flag deleted files
#
if ( defined($attr) ) {
my $a = $attr->get;
foreach my $fileUM ( keys(%$a) ) {
next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED );
$files->{$fileUM}[$i]{type} = BPC_FTYPE_DELETED;
}
}
#
# Merge old backups. Don't merge directories from old
# backups because every backup has an accurate directory
# tree.
#
for ( my $k = $i - 1 ; $level > 0 && $k >= 0 ; $k-- ) {
next if ( $m->{backups}[$k]{level} >= $level );
$level = $m->{backups}[$k]{level};
foreach my $fileUM ( keys(%$files) ) {
next
if ( !defined($files->{$fileUM}[$k])
|| defined($files->{$fileUM}[$i])
|| $files->{$fileUM}[$k]{type} == BPC_FTYPE_DIR );
$files->{$fileUM}[$i] = $files->{$fileUM}[$k];
}
}
}
#
# Remove deleted files
#
for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
last if ( $m->{backups}[$i]{version} >= 4 );
foreach my $fileUM ( keys(%$files) ) {
next if ( !defined($files->{$fileUM}[$i]) || $files->{$fileUM}[$i]{type} != BPC_FTYPE_DELETED );
$files->{$fileUM}[$i] = undef;
}
}
#
# Now handle any >= 4.x backups. We merge backups, starting at
# the last and work backwards.
#
# In 4.x+ backups the full directory tree only exists in the
# last backup. Prior backups will only have directories where
# some part of the backup has changed.
#
for ( $i = @{$m->{backups}} - 1 ; $i >= 0 ; $i-- ) {
#print(STDERR "Do $i (num = $m->{backups}[$i]{num}, fill = $m->{backups}[$i]{noFill}, level = $m->{backups}[$i]{level})\n");
last if ( $m->{backups}[$i]{version} < 4 );
if ( $i < @{$m->{backups}} - 1 && $m->{backups}[$i]{noFill} ) {
#
# Copy all the file information from $i + 1 to $i
#
foreach my $fileUM ( keys(%$files) ) {
$files->{$fileUM}[$i] = $files->{$fileUM}[$i + 1];
}
}
my $backupNum = $m->{backups}[$i]{num};
my $mangle = $m->{backups}[$i]{mangle};
my $compress = $m->{backups}[$i]{compress};
my $topPath = "$m->{topDir}/pc/$m->{host}/$backupNum/";
my $sharePathM = $m->{bpc}->fileNameEltMangle($share) . $m->{bpc}->fileNameMangle($dir);
my $path = $topPath . $sharePathM;
#print(STDERR "Opening $path (share=$share, mangle=$mangle)\n");
my $dirOpts = {%{$m->{dirOpts} || {}}};
my $attribOpts = {compress => $compress};
if ( !-d $path ) {
#
# if this is a filled backup then the directory is empty
#
next if ( !$m->{backups}[$i]{noFill} );
#
# if we have some entries already we need to check that
# this directory wasn't deleted. We need to look up
# up each level until we find an attrib file that exists.
#
if ( !$m->dirNotDeleted($i, $share, $dir) ) {
foreach my $fileUM ( keys(%$files) ) {
$files->{$fileUM}[$i] = undef;
}
}
}
my $attr = BackupPC::XS::Attrib::new($compress);
if ( BackupPC::DirOps::dirContainsAttrib($m->{bpc}, $path) ) {
if ( !$attr->read($path) ) {
push(@{$m->{error}}, "Can't read attribute file in $path\n");
} else {
my $idx = 0;
my $a;
while ( 1 ) {
($a, $idx) = $attr->iterate($idx);
last if ( !defined($a) );
my $fileUM = $a->{name};
if ( $a->{type} == BPC_FTYPE_DELETED ) {
delete($files->{$fileUM}[$i]);
delete($hardlinks->{$fileUM});
next;
}
if ( $a->{nlinks} > 0 ) {
$a = $m->hardLinkGet($a, $i);
$hardlinks->{$fileUM} = 1;
}
$files->{$fileUM}[$i] = $a;
($files->{$fileUM}[$i]{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
if ( length($a->{digest}) ) {
$files->{$fileUM}[$i]{fullPath} = $m->{bpc}->MD52Path($a->{digest}, $compress);
} else {
$files->{$fileUM}[$i]{fullPath} = "/dev/null";
}
$files->{$fileUM}[$i]{backupNum} = $backupNum;
$files->{$fileUM}[$i]{compress} = $compress;
$files->{$fileUM}[$i]{inode} = $a->{inode};
}
}
}
#
# Update any inode information specific to this backup
# for hardlinks in this directory
#
foreach my $f ( keys(%$hardlinks) ) {
next if ( !$files->{$f}[$i] || $files->{$f}[$i]{backupNum} == $backupNum );
my $a = $m->hardLinkGet($files->{$f}[$i], $i);
next if ( $a == $files->{$f}[$i] );
$files->{$f}[$i] = {%{$files->{$f}[$i]}, %$a};
if ( length($a->{digest}) ) {
$files->{$f}[$i]{fullPath} = $m->{bpc}->MD52Path($a->{digest}, $compress);
}
$files->{$f}[$i]{backupNum} = $backupNum;
$files->{$f}[$i]{inode} = $a->{inode};
}
}
#print STDERR "Returning:\n", Dumper($files);
return $files;
}
#
# Do a recursive find starting at the given path (either a file
# or directory). The callback function $callback is called on each
# file and directory. The function arguments are the attrs hashref,
# and additional callback arguments. The search is depth-first if
# depth is set. Returns -1 if $path does not exist.
#
sub find
{
my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_;
#print(STDERR "find: got $backupNum, $share, $path\n");
#
# First call the callback on the given $path
#
my $attr = $m->fileAttrib($backupNum, $share, $path);
return -1 if ( !defined($attr) );
&$callback($attr, @callbackArgs);
return if ( $attr->{type} != BPC_FTYPE_DIR );
#
# Now recurse into subdirectories
#
$m->findRecurse($backupNum, $share, $path, $depth, $callback, @callbackArgs);
}
#
# Same as find(), except the callback is not called on the current
# $path, only on the contents of $path. So if $path is a file then
# no callback or recursion occurs.
#
sub findRecurse
{
my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_;
my $attr = $m->dirAttrib($backupNum, $share, $path);
return if ( !defined($attr) );
foreach my $file ( sort(keys(%$attr)) ) {
&$callback($attr->{$file}, @callbackArgs);
next if ( $depth <= 0 || $attr->{$file}{type} != BPC_FTYPE_DIR );
#
# For depth-first, recurse as we hit each directory
#
$m->findRecurse($backupNum, $share, "$path/$file", $depth, $callback, @callbackArgs);
}
if ( $depth == 0 ) {
#
# For non-depth, recurse directories after we finish current dir
#
foreach my $file ( sort(keys(%{$attr})) ) {
next if ( $attr->{$file}{type} != BPC_FTYPE_DIR );
$m->findRecurse($backupNum, $share, "$path/$file", $depth, $callback, @callbackArgs);
}
}
}
1;
|
