1 #============================================================= -*-perl-*-
3 # BackupPC::View package
7 # This library defines a BackupPC::View class for merging of
8 # incremental backups and file attributes. This provides the
9 # caller with a single view of a merged backup, without worrying
10 # about which backup contributes which files.
13 # Craig Barratt <cbarratt@users.sourceforge.net>
16 # Copyright (C) 2002-2003 Craig Barratt
18 # This program is free software; you can redistribute it and/or modify
19 # it under the terms of the GNU General Public License as published by
20 # the Free Software Foundation; either version 2 of the License, or
21 # (at your option) any later version.
23 # This program is distributed in the hope that it will be useful,
24 # but WITHOUT ANY WARRANTY; without even the implied warranty of
25 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 # GNU General Public License for more details.
28 # You should have received a copy of the GNU General Public License
29 # along with this program; if not, write to the Free Software
30 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 #========================================================================
34 # Version 3.0.0, released 28 Jan 2007.
36 # See http://backuppc.sourceforge.net.
38 #========================================================================
40 package BackupPC::View;
46 use BackupPC::Attrib qw(:all);
47 use BackupPC::FileZIO;
52 my($class, $bpc, $host, $backups, $options) = @_;
54 bpc => $bpc, # BackupPC::Lib object
55 host => $host, # host name
56 backups => $backups, # all backups for this host
57 num => -1, # backup number
58 idx => -1, # index into backups for backup
60 dirPath => undef, # path to current directory
61 dirAttr => undef, # attributes of current directory
62 dirOpts => $options, # $options is a hash of file attributes we need:
63 # type, inode, or nlink. If set, these parameters
64 # are added to the returned hash.
65 # See BackupPC::Lib::dirRead().
67 $m->{topDir} = $m->{bpc}->TopDir();
73 my($m, $backupNum, $share, $dir) = @_;
76 #print STDERR "dirCache($backupNum, $share, $dir)\n";
77 $dir = "/$dir" if ( $dir !~ m{^/} );
79 return if ( $m->{num} == $backupNum
80 && $m->{share} eq $share
82 && $m->{dir} eq $dir );
83 $m->backupNumCache($backupNum) if ( $m->{num} != $backupNum );
84 return if ( $m->{idx} < 0 );
87 $level = $m->{backups}[$m->{idx}]{level} + 1;
90 # Remember the requested share and dir
96 # merge backups, starting at the requested one, and working
97 # backwards until we get to level 0.
100 for ( $i = $m->{idx} ; $level > 0 && $i >= 0 ; $i-- ) {
101 #print(STDERR "Do $i ($m->{backups}[$i]{noFill},$m->{backups}[$i]{level})\n");
103 # skip backups with the same or higher level
105 next if ( $m->{backups}[$i]{level} >= $level );
107 $level = $m->{backups}[$i]{level};
108 $backupNum = $m->{backups}[$i]{num};
109 push(@{$m->{mergeNums}}, $backupNum);
110 my $mangle = $m->{backups}[$i]{mangle};
111 my $compress = $m->{backups}[$i]{compress};
112 my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
115 $sharePathM = $m->{bpc}->fileNameEltMangle($share)
116 . $m->{bpc}->fileNameMangle($dir);
118 $sharePathM = $share . $dir;
120 $path .= $sharePathM;
121 #print(STDERR "Opening $path (share=$share)\n");
123 my $dirInfo = $m->{bpc}->dirRead($path, $m->{dirOpts});
124 if ( !defined($dirInfo) ) {
125 if ( $i == $m->{idx} ) {
127 # Oops, directory doesn't exist.
136 $attr = BackupPC::Attrib->new({ compress => $compress });
137 if ( !$attr->read($path) ) {
138 $m->{error} = "Can't read attribute file in $path";
142 foreach my $entry ( @$dirInfo ) {
143 my $file = $1 if ( $entry->{name} =~ /(.*)/s );
145 $fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
146 #print(STDERR "Doing $fileUM\n");
150 next if ( defined($m->{files}{$fileUM})
153 || $file eq "backupInfo"
154 || $mangle && $file eq "attrib" );
155 if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) {
156 $m->{files}{$fileUM} = $a;
158 # skip directories in earlier backups (each backup always
159 # has the complete directory tree).
161 next if ( $i < $m->{idx} && $a->{type} == BPC_FTYPE_DIR );
162 $attr->set($fileUM, undef);
165 # Very expensive in the non-attribute case when compresseion
166 # is on. We have to stat the file and read compressed files
167 # to determine their size.
169 my @s = stat("$path/$file");
170 next if ( $i < $m->{idx} && -d _ );
171 $m->{files}{$fileUM} = {
172 type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE,
176 size => -f _ ? $s[7] : 0,
179 if ( $compress && -f _ ) {
181 # Compute the correct size by reading the whole file
183 my $f = BackupPC::FileZIO->open("$path/$file",
185 if ( !defined($f) ) {
186 $m->{error} = "Can't open $path/$file";
189 while ( $f->read(\$data, 65636 * 8) > 0 ) {
190 $size += length($data);
193 $m->{files}{$fileUM}{size} = $size;
197 ($m->{files}{$fileUM}{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
198 ($m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file")
200 ($m->{files}{$fileUM}{fullPath} = "$path/$file") =~ s{//+}{/}g;
201 $m->{files}{$fileUM}{backupNum} = $backupNum;
202 $m->{files}{$fileUM}{compress} = $compress;
203 $m->{files}{$fileUM}{nlink} = $entry->{nlink}
204 if ( $m->{dirOpts}{nlink} );
205 $m->{files}{$fileUM}{inode} = $entry->{inode}
206 if ( $m->{dirOpts}{inode} );
209 # Also include deleted files
211 if ( defined($attr) ) {
213 foreach my $fileUM ( keys(%$a) ) {
214 next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED );
216 $file = $m->{bpc}->fileNameMangle($fileUM) if ( $mangle );
217 $m->{files}{$fileUM} = $a->{$fileUM};
218 $m->{files}{$fileUM}{relPath} = "$dir/$fileUM";
219 $m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file";
220 $m->{files}{$fileUM}{fullPath} = "$path/$file";
221 $m->{files}{$fileUM}{backupNum} = $backupNum;
222 $m->{files}{$fileUM}{compress} = $compress;
223 $m->{files}{$fileUM}{nlink} = 0;
224 $m->{files}{$fileUM}{inode} = 0;
229 # Prune deleted files
231 foreach my $file ( keys(%{$m->{files}}) ) {
232 next if ( $m->{files}{$file}{type} != BPC_FTYPE_DELETED );
233 delete($m->{files}{$file});
235 #print STDERR "Returning:\n", Dumper($m->{files});
239 # Return list of shares for this backup
243 my($m, $backupNum) = @_;
246 $m->backupNumCache($backupNum) if ( $m->{num} != $backupNum );
247 return if ( $m->{idx} < 0 );
249 my $mangle = $m->{backups}[$m->{idx}]{mangle};
250 my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
251 return if ( !opendir(DIR, $path) );
252 my @dir = readdir(DIR);
254 foreach my $file ( @dir ) {
255 $file = $1 if ( $file =~ /(.*)/s );
256 next if ( $file eq "attrib" && $mangle
259 || $file eq "backupInfo"
262 $fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
263 push(@shareList, $fileUM);
271 my($m, $backupNum) = @_;
273 if ( $m->{num} != $backupNum ) {
275 for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
276 last if ( $m->{backups}[$i]{num} == $backupNum );
278 if ( $i >= @{$m->{backups}} ) {
282 $m->{num} = $backupNum;
288 # Return the attributes of a specific file
292 my($m, $backupNum, $share, $path) = @_;
294 #print(STDERR "fileAttrib($backupNum, $share, $path)\n");
295 if ( $path =~ s{(.*)/+(.+)}{$1}s ) {
297 $m->dirCache($backupNum, $share, $path);
298 return $m->{files}{$file};
300 #print STDERR "Got empty $path\n";
301 $m->dirCache($backupNum, "", "");
302 my $attr = $m->{files}{$share};
303 return if ( !defined($attr) );
304 $attr->{relPath} = "/";
310 # Return the contents of a directory
314 my($m, $backupNum, $share, $dir) = @_;
316 $m->dirCache($backupNum, $share, $dir);
321 # Return a listref of backup numbers that are merged to create this view
327 return $m->{mergeNums};
331 # Return a list of backup indexes for which the directory exists
335 my($m, $share, $dir) = @_;
338 $dir = "/$dir" if ( $dir !~ m{^/} );
341 for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
342 my $backupNum = $m->{backups}[$i]{num};
343 my $mangle = $m->{backups}[$i]{mangle};
344 my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
347 $sharePathM = $m->{bpc}->fileNameEltMangle($share)
348 . $m->{bpc}->fileNameMangle($dir);
350 $sharePathM = $share . $dir;
352 $path .= $sharePathM;
353 next if ( !-d $path );
354 push(@backupList, $i);
360 # Return the history of all backups for a particular directory
364 my($m, $share, $dir) = @_;
368 $dir = "/$dir" if ( $dir !~ m{^/} );
372 # merge backups, starting at the first one, and working
375 for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
376 $level = $m->{backups}[$i]{level};
377 my $backupNum = $m->{backups}[$i]{num};
378 my $mangle = $m->{backups}[$i]{mangle};
379 my $compress = $m->{backups}[$i]{compress};
380 my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
383 $sharePathM = $m->{bpc}->fileNameEltMangle($share)
384 . $m->{bpc}->fileNameMangle($dir);
386 $sharePathM = $share . $dir;
388 $path .= $sharePathM;
389 #print(STDERR "Opening $path (share=$share)\n");
391 my $dirInfo = $m->{bpc}->dirRead($path, $m->{dirOpts});
392 if ( !defined($dirInfo) ) {
394 # Oops, directory doesn't exist.
400 $attr = BackupPC::Attrib->new({ compress => $compress });
401 if ( !$attr->read($path) ) {
402 $m->{error} = "Can't read attribute file in $path";
406 foreach my $entry ( @$dirInfo ) {
407 my $file = $1 if ( $entry->{name} =~ /(.*)/s );
409 $fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
410 #print(STDERR "Doing $fileUM\n");
414 next if ( $file eq ".."
416 || $mangle && $file eq "attrib"
417 || defined($files->{$fileUM}[$i]) );
418 my @s = stat("$path/$file");
419 if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) {
420 $files->{$fileUM}[$i] = $a;
421 $attr->set($fileUM, undef);
424 # Very expensive in the non-attribute case when compresseion
425 # is on. We have to stat the file and read compressed files
426 # to determine their size.
428 $files->{$fileUM}[$i] = {
429 type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE,
433 size => -f _ ? $s[7] : 0,
436 if ( $compress && -f _ ) {
438 # Compute the correct size by reading the whole file
440 my $f = BackupPC::FileZIO->open("$path/$file",
442 if ( !defined($f) ) {
443 $m->{error} = "Can't open $path/$file";
446 while ( $f->read(\$data, 65636 * 8) > 0 ) {
447 $size += length($data);
450 $files->{$fileUM}[$i]{size} = $size;
454 ($files->{$fileUM}[$i]{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
455 ($files->{$fileUM}[$i]{sharePathM} = "$sharePathM/$file")
457 ($files->{$fileUM}[$i]{fullPath} = "$path/$file") =~ s{//+}{/}g;
458 $files->{$fileUM}[$i]{backupNum} = $backupNum;
459 $files->{$fileUM}[$i]{compress} = $compress;
460 $files->{$fileUM}[$i]{nlink} = $entry->{nlink}
461 if ( $m->{dirOpts}{nlink} );
462 $files->{$fileUM}[$i]{inode} = $entry->{inode}
463 if ( $m->{dirOpts}{inode} );
469 if ( defined($attr) ) {
471 foreach my $fileUM ( keys(%$a) ) {
472 next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED );
473 $files->{$fileUM}[$i]{type} = BPC_FTYPE_DELETED;
478 # Merge old backups. Don't merge directories from old
479 # backups because every backup has an accurate directory
482 for ( my $k = $i - 1 ; $level > 0 && $k >= 0 ; $k-- ) {
483 next if ( $m->{backups}[$k]{level} >= $level );
484 $level = $m->{backups}[$k]{level};
485 foreach my $fileUM ( keys(%$files) ) {
486 next if ( !defined($files->{$fileUM}[$k])
487 || defined($files->{$fileUM}[$i])
488 || $files->{$fileUM}[$k]{type} == BPC_FTYPE_DIR );
489 $files->{$fileUM}[$i] = $files->{$fileUM}[$k];
495 # Remove deleted files
497 for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
498 foreach my $fileUM ( keys(%$files) ) {
499 next if ( !defined($files->{$fileUM}[$i])
500 || $files->{$fileUM}[$i]{type} != BPC_FTYPE_DELETED );
501 $files->{$fileUM}[$i] = undef;
505 #print STDERR "Returning:\n", Dumper($files);
511 # Do a recursive find starting at the given path (either a file
512 # or directory). The callback function $callback is called on each
513 # file and directory. The function arguments are the attrs hashref,
514 # and additional callback arguments. The search is depth-first if
515 # depth is set. Returns -1 if $path does not exist.
519 my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_;
521 #print(STDERR "find: got $backupNum, $share, $path\n");
523 # First call the callback on the given $path
525 my $attr = $m->fileAttrib($backupNum, $share, $path);
526 return -1 if ( !defined($attr) );
527 &$callback($attr, @callbackArgs);
528 return if ( $attr->{type} != BPC_FTYPE_DIR );
531 # Now recurse into subdirectories
533 $m->findRecurse($backupNum, $share, $path, $depth,
534 $callback, @callbackArgs);
538 # Same as find(), except the callback is not called on the current
539 # $path, only on the contents of $path. So if $path is a file then
540 # no callback or recursion occurs.
544 my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_;
546 my $attr = $m->dirAttrib($backupNum, $share, $path);
547 return if ( !defined($attr) );
548 foreach my $file ( sort(keys(%$attr)) ) {
549 &$callback($attr->{$file}, @callbackArgs);
550 next if ( !$depth || $attr->{$file}{type} != BPC_FTYPE_DIR );
552 # For depth-first, recurse as we hit each directory
554 $m->findRecurse($backupNum, $share, "$path/$file", $depth,
555 $callback, @callbackArgs);
559 # For non-depth, recurse directories after we finish current dir
561 foreach my $file ( keys(%{$attr}) ) {
562 next if ( $attr->{$file}{type} != BPC_FTYPE_DIR );
563 $m->findRecurse($backupNum, $share, "$path/$file", $depth,
564 $callback, @callbackArgs);