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 2.1.0, released 20 Jun 2004.
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) = @_;
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
63 for ( my $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
64 next if ( defined($m->{backups}[$i]{level}) );
65 $m->{backups}[$i]{level} = $m->{backups}[$i]{type} eq "incr" ? 1 : 0;
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");
122 if ( !opendir(DIR, $path) ) {
123 if ( $i == $m->{idx} ) {
125 # Oops, directory doesn't exist.
132 my @dir = readdir(DIR);
136 $attr = BackupPC::Attrib->new({ compress => $compress });
137 if ( -f $attr->fileName($path) && !$attr->read($path) ) {
138 $m->{error} = "Can't read attribute file in $path";
142 foreach my $file ( @dir ) {
143 $file = $1 if ( $file =~ /(.*)/ );
145 $fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
146 #print(STDERR "Doing $fileUM\n");
150 next if ( defined($m->{files}{$fileUM})
153 || $mangle && $file eq "attrib" );
155 # skip directories in earlier backups (each backup always
156 # has the complete directory tree).
158 my @s = stat("$path/$file");
159 next if ( $i < $m->{idx} && -d _ );
160 if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) {
161 $m->{files}{$fileUM} = $a;
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 $m->{files}{$fileUM} = {
170 type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE,
174 size => -f _ ? $s[7] : 0,
177 if ( $compress && -f _ ) {
179 # Compute the correct size by reading the whole file
181 my $f = BackupPC::FileZIO->open("$path/$file",
183 if ( !defined($f) ) {
184 $m->{error} = "Can't open $path/$file";
187 while ( $f->read(\$data, 65636 * 8) > 0 ) {
188 $size += length($data);
191 $m->{files}{$fileUM}{size} = $size;
195 ($m->{files}{$fileUM}{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
196 ($m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file")
198 ($m->{files}{$fileUM}{fullPath} = "$path/$file") =~ s{//+}{/}g;
199 $m->{files}{$fileUM}{backupNum} = $backupNum;
200 $m->{files}{$fileUM}{compress} = $compress;
201 $m->{files}{$fileUM}{nlink} = $s[3];
202 $m->{files}{$fileUM}{inode} = $s[1];
205 # Also include deleted files
207 if ( defined($attr) ) {
209 foreach my $fileUM ( keys(%$a) ) {
210 next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED );
212 $file = $m->{bpc}->fileNameMangle($fileUM) if ( $mangle );
213 $m->{files}{$fileUM} = $a->{$fileUM};
214 $m->{files}{$fileUM}{relPath} = "$dir/$fileUM";
215 $m->{files}{$fileUM}{sharePathM} = "$sharePathM/$file";
216 $m->{files}{$fileUM}{fullPath} = "$path/$file";
217 $m->{files}{$fileUM}{backupNum} = $backupNum;
218 $m->{files}{$fileUM}{compress} = $compress;
219 $m->{files}{$fileUM}{nlink} = 0;
220 $m->{files}{$fileUM}{inode} = 0;
225 # Prune deleted files
227 foreach my $file ( keys(%{$m->{files}}) ) {
228 next if ( $m->{files}{$file}{type} != BPC_FTYPE_DELETED );
229 delete($m->{files}{$file});
231 #print STDERR "Returning:\n", Dumper($m->{files});
235 # Return list of shares for this backup
239 my($m, $backupNum) = @_;
242 $m->backupNumCache($backupNum) if ( $m->{num} != $backupNum );
243 return if ( $m->{idx} < 0 );
245 my $mangle = $m->{backups}[$m->{idx}]{mangle};
246 my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
247 return if ( !opendir(DIR, $path) );
248 my @dir = readdir(DIR);
250 foreach my $file ( @dir ) {
251 $file = $1 if ( $file =~ /(.*)/ );
252 next if ( $file eq "attrib" && $mangle
256 $fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
257 push(@shareList, $fileUM);
265 my($m, $backupNum) = @_;
267 if ( $m->{num} != $backupNum ) {
269 for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
270 last if ( $m->{backups}[$i]{num} == $backupNum );
272 if ( $i >= @{$m->{backups}} ) {
276 $m->{num} = $backupNum;
282 # Return the attributes of a specific file
286 my($m, $backupNum, $share, $path) = @_;
288 #print(STDERR "fileAttrib($backupNum, $share, $path)\n");
289 if ( $path =~ s{(.*)/+(.+)}{$1} ) {
291 $m->dirCache($backupNum, $share, $path);
292 return $m->{files}{$file};
294 #print STDERR "Got empty $path\n";
295 $m->dirCache($backupNum, "", "");
296 my $attr = $m->{files}{$share};
297 return if ( !defined($attr) );
298 $attr->{relPath} = "/";
304 # Return the contents of a directory
308 my($m, $backupNum, $share, $dir) = @_;
310 $m->dirCache($backupNum, $share, $dir);
315 # Return a listref of backup numbers that are merged to create this view
321 return $m->{mergeNums};
325 # Return a list of backup indexes for which the directory exists
329 my($m, $share, $dir) = @_;
332 $dir = "/$dir" if ( $dir !~ m{^/} );
335 for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
336 my $backupNum = $m->{backups}[$i]{num};
337 my $mangle = $m->{backups}[$i]{mangle};
338 my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
341 $sharePathM = $m->{bpc}->fileNameEltMangle($share)
342 . $m->{bpc}->fileNameMangle($dir);
344 $sharePathM = $share . $dir;
346 $path .= $sharePathM;
347 next if ( !-d $path );
348 push(@backupList, $i);
354 # Return the history of all backups for a particular directory
358 my($m, $share, $dir) = @_;
362 $dir = "/$dir" if ( $dir !~ m{^/} );
366 # merge backups, starting at the first one, and working
369 for ( $i = 0 ; $i < @{$m->{backups}} ; $i++ ) {
370 $level = $m->{backups}[$i]{level};
371 my $backupNum = $m->{backups}[$i]{num};
372 my $mangle = $m->{backups}[$i]{mangle};
373 my $compress = $m->{backups}[$i]{compress};
374 my $path = "$m->{topDir}/pc/$m->{host}/$backupNum/";
377 $sharePathM = $m->{bpc}->fileNameEltMangle($share)
378 . $m->{bpc}->fileNameMangle($dir);
380 $sharePathM = $share . $dir;
382 $path .= $sharePathM;
383 #print(STDERR "Opening $path (share=$share)\n");
384 if ( !opendir(DIR, $path) ) {
386 # Oops, directory doesn't exist.
390 my @dir = readdir(DIR);
394 $attr = BackupPC::Attrib->new({ compress => $compress });
395 if ( -f $attr->fileName($path) && !$attr->read($path) ) {
396 $m->{error} = "Can't read attribute file in $path";
400 foreach my $file ( @dir ) {
401 $file = $1 if ( $file =~ /(.*)/ );
403 $fileUM = $m->{bpc}->fileNameUnmangle($fileUM) if ( $mangle );
404 #print(STDERR "Doing $fileUM\n");
408 next if ( $file eq ".."
410 || $mangle && $file eq "attrib"
411 || defined($files->{$fileUM}[$i]) );
412 my @s = stat("$path/$file");
413 if ( defined($attr) && defined(my $a = $attr->get($fileUM)) ) {
414 $files->{$fileUM}[$i] = $a;
415 $attr->set($fileUM, undef);
418 # Very expensive in the non-attribute case when compresseion
419 # is on. We have to stat the file and read compressed files
420 # to determine their size.
422 $files->{$fileUM}[$i] = {
423 type => -d _ ? BPC_FTYPE_DIR : BPC_FTYPE_FILE,
427 size => -f _ ? $s[7] : 0,
430 if ( $compress && -f _ ) {
432 # Compute the correct size by reading the whole file
434 my $f = BackupPC::FileZIO->open("$path/$file",
436 if ( !defined($f) ) {
437 $m->{error} = "Can't open $path/$file";
440 while ( $f->read(\$data, 65636 * 8) > 0 ) {
441 $size += length($data);
444 $files->{$fileUM}[$i]{size} = $size;
448 ($files->{$fileUM}[$i]{relPath} = "$dir/$fileUM") =~ s{//+}{/}g;
449 ($files->{$fileUM}[$i]{sharePathM} = "$sharePathM/$file")
451 ($files->{$fileUM}[$i]{fullPath} = "$path/$file") =~ s{//+}{/}g;
452 $files->{$fileUM}[$i]{backupNum} = $backupNum;
453 $files->{$fileUM}[$i]{compress} = $compress;
454 $files->{$fileUM}[$i]{nlink} = $s[3];
455 $files->{$fileUM}[$i]{inode} = $s[1];
459 # Merge old backups. Don't merge directories from old
460 # backups because every backup has an accurate directory
463 for ( my $k = $i - 1 ; $level > 0 && $k >= 0 ; $k-- ) {
464 next if ( $m->{backups}[$k]{level} >= $level );
465 $level = $m->{backups}[$k]{level};
466 foreach my $fileUM ( keys(%$files) ) {
467 next if ( !defined($files->{$fileUM}[$k])
468 || defined($files->{$fileUM}[$i])
469 || $files->{$fileUM}[$k]{type} == BPC_FTYPE_DIR );
470 $files->{$fileUM}[$i] = $files->{$fileUM}[$k];
475 # Finally, remove deleted files
477 if ( defined($attr) ) {
479 foreach my $fileUM ( keys(%$a) ) {
480 next if ( $a->{$fileUM}{type} != BPC_FTYPE_DELETED );
481 $files->{$fileUM}[$i] = undef if ( defined($files->{$fileUM}) );
485 #print STDERR "Returning:\n", Dumper($files);
491 # Do a recursive find starting at the given path (either a file
492 # or directory). The callback function $callback is called on each
493 # file and directory. The function arguments are the attrs hashref,
494 # and additional callback arguments. The search is depth-first if
495 # depth is set. Returns -1 if $path does not exist.
499 my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_;
501 #print(STDERR "find: got $backupNum, $share, $path\n");
503 # First call the callback on the given $path
505 my $attr = $m->fileAttrib($backupNum, $share, $path);
506 return -1 if ( !defined($attr) );
507 &$callback($attr, @callbackArgs);
508 return if ( $attr->{type} != BPC_FTYPE_DIR );
511 # Now recurse into subdirectories
513 $m->findRecurse($backupNum, $share, $path, $depth,
514 $callback, @callbackArgs);
518 # Same as find(), except the callback is not called on the current
519 # $path, only on the contents of $path. So if $path is a file then
520 # no callback or recursion occurs.
524 my($m, $backupNum, $share, $path, $depth, $callback, @callbackArgs) = @_;
526 my $attr = $m->dirAttrib($backupNum, $share, $path);
527 return if ( !defined($attr) );
528 foreach my $file ( sort(keys(%$attr)) ) {
529 &$callback($attr->{$file}, @callbackArgs);
530 next if ( !$depth || $attr->{$file}{type} != BPC_FTYPE_DIR );
532 # For depth-first, recurse as we hit each directory
534 $m->findRecurse($backupNum, $share, "$path/$file", $depth,
535 $callback, @callbackArgs);
539 # For non-depth, recurse directories after we finish current dir
541 foreach my $file ( keys(%{$attr}) ) {
542 next if ( $attr->{$file}{type} != BPC_FTYPE_DIR );
543 $m->findRecurse($backupNum, $share, "$path/$file", $depth,
544 $callback, @callbackArgs);