X-Git-Url: http://git.rot13.org/?p=BackupPC.git;a=blobdiff_plain;f=lib%2FBackupPC%2FLib.pm;h=3e320baa58280f7b4104cb39bdeff20f28718e1f;hp=0c4b69b075f9c21174c21852f3397afe9a33f9ef;hb=fda25dc88a63ccac1c80efa2e4994bf0725ca9b7;hpb=c2b072c9ad558447fb73fedf0cad170214b7d80e diff --git a/lib/BackupPC/Lib.pm b/lib/BackupPC/Lib.pm index 0c4b69b..3e320ba 100644 --- a/lib/BackupPC/Lib.pm +++ b/lib/BackupPC/Lib.pm @@ -11,7 +11,7 @@ # Craig Barratt # # COPYRIGHT -# Copyright (C) 2001-2003 Craig Barratt +# Copyright (C) 2001-2007 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 @@ -29,7 +29,7 @@ # #======================================================================== # -# Version 3.0.0, released 28 Jan 2007. +# Version 3.1.0, released 25 Nov 2007. # # See http://backuppc.sourceforge.net. # @@ -41,15 +41,64 @@ use strict; use vars qw(%Conf %Lang); use BackupPC::Storage; -use Fcntl qw/:flock/; +use Fcntl ':mode'; use Carp; -use DirHandle (); use File::Path; use File::Compare; use Socket; use Cwd; use Digest::MD5; use Config; +use Encode qw/from_to encode_utf8/; + +use vars qw( $IODirentOk ); +use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS); + +require Exporter; +require DynaLoader; + +@ISA = qw(Exporter DynaLoader); +@EXPORT_OK = qw( BPC_DT_UNKNOWN + BPC_DT_FIFO + BPC_DT_CHR + BPC_DT_DIR + BPC_DT_BLK + BPC_DT_REG + BPC_DT_LNK + BPC_DT_SOCK + ); +@EXPORT = qw( ); +%EXPORT_TAGS = ('BPC_DT_ALL' => [@EXPORT, @EXPORT_OK]); + +BEGIN { + eval "use IO::Dirent qw( readdirent DT_DIR );"; + if ( !$@ && opendir(my $fh, ".") ) { + # + # Make sure the IO::Dirent really works - some installs + # on certain file systems don't return a valid type. + # + my $dt_dir = eval("DT_DIR"); + foreach my $e ( readdirent($fh) ) { + if ( $e->{name} eq "." && $e->{type} == $dt_dir ) { + $IODirentOk = 1; + last; + } + } + closedir($fh); + } +}; + +# +# The need to match the constants in IO::Dirent +# +use constant BPC_DT_UNKNOWN => 0; +use constant BPC_DT_FIFO => 1; ## named pipe (fifo) +use constant BPC_DT_CHR => 2; ## character special +use constant BPC_DT_DIR => 4; ## directory +use constant BPC_DT_BLK => 6; ## block special +use constant BPC_DT_REG => 8; ## regular +use constant BPC_DT_LNK => 10; ## symbolic link +use constant BPC_DT_SOCK => 12; ## socket sub new { @@ -79,7 +128,7 @@ sub new useFHS => $useFHS, TopDir => $topDir, InstallDir => $installDir, - ConfDir => $confDir eq "" ? '/etc/BackupPC' : $confDir, + ConfDir => $confDir eq "" ? '/tera0/backup/BackupPC/conf' : $confDir, LogDir => '/var/log/BackupPC', }; } else { @@ -94,7 +143,7 @@ sub new my $bpc = bless { %$paths, - Version => '3.0.0', + Version => '3.1.0', }, $class; $bpc->{storage} = BackupPC::Storage->new($paths); @@ -360,6 +409,12 @@ sub ConfigRead return $mesg; } $bpc->{Lang} = \%Lang; + + # + # Make sure IncrLevels is defined + # + $bpc->{Conf}{IncrLevels} = [1] if ( !defined($bpc->{Conf}{IncrLevels}) ); + return; } @@ -404,11 +459,115 @@ sub HostsMTime return $bpc->{storage}->HostsMTime(); } +# +# Read a directory and return the entries in sorted inode order. +# This relies on the IO::Dirent module being installed. If not, +# the inode data is empty and the default directory order is +# returned. +# +# The returned data is a list of hashes with entries {name, type, inode, nlink}. +# The returned data includes "." and "..". +# +# $need is a hash of file attributes we need: type, inode, or nlink. +# If set, these parameters are added to the returned hash. +# +# To support browsing pre-3.0.0 backups where the charset encoding +# is typically iso-8859-1, the charsetLegacy option can be set in +# $need to convert the path from utf8 and convert the names to utf8. +# +# If IO::Dirent is successful if will get type and inode for free. +# Otherwise, a stat is done on each file, which is more expensive. +# +sub dirRead +{ + my($bpc, $path, $need) = @_; + my(@entries, $addInode); + + from_to($path, "utf8", $need->{charsetLegacy}) + if ( $need->{charsetLegacy} ne "" ); + return if ( !opendir(my $fh, $path) ); + if ( $IODirentOk ) { + @entries = sort({ $a->{inode} <=> $b->{inode} } readdirent($fh)); + map { $_->{type} = 0 + $_->{type} } @entries; # make type numeric + } else { + @entries = map { { name => $_} } readdir($fh); + } + closedir($fh); + if ( defined($need) ) { + for ( my $i = 0 ; $i < @entries ; $i++ ) { + next if ( (!$need->{inode} || defined($entries[$i]{inode})) + && (!$need->{type} || defined($entries[$i]{type})) + && (!$need->{nlink} || defined($entries[$i]{nlink})) ); + my @s = stat("$path/$entries[$i]{name}"); + $entries[$i]{nlink} = $s[3] if ( $need->{nlink} ); + if ( $need->{inode} && !defined($entries[$i]{inode}) ) { + $addInode = 1; + $entries[$i]{inode} = $s[1]; + } + if ( $need->{type} && !defined($entries[$i]{type}) ) { + my $mode = S_IFMT($s[2]); + $entries[$i]{type} = BPC_DT_FIFO if ( S_ISFIFO($mode) ); + $entries[$i]{type} = BPC_DT_CHR if ( S_ISCHR($mode) ); + $entries[$i]{type} = BPC_DT_DIR if ( S_ISDIR($mode) ); + $entries[$i]{type} = BPC_DT_BLK if ( S_ISBLK($mode) ); + $entries[$i]{type} = BPC_DT_REG if ( S_ISREG($mode) ); + $entries[$i]{type} = BPC_DT_LNK if ( S_ISLNK($mode) ); + $entries[$i]{type} = BPC_DT_SOCK if ( S_ISSOCK($mode) ); + } + } + } + # + # Sort the entries if inodes were added (the IO::Dirent case already + # sorted above) + # + @entries = sort({ $a->{inode} <=> $b->{inode} } @entries) if ( $addInode ); + # + # for browing pre-3.0.0 backups, map iso-8859-1 to utf8 if requested + # + if ( $need->{charsetLegacy} ne "" ) { + for ( my $i = 0 ; $i < @entries ; $i++ ) { + from_to($entries[$i]{name}, $need->{charsetLegacy}, "utf8"); + } + } + return \@entries; +} + +# +# Same as dirRead, but only returns the names (which will be sorted in +# inode order if IO::Dirent is installed) +# +sub dirReadNames +{ + my($bpc, $path, $need) = @_; + + my $entries = $bpc->dirRead($path, $need); + return if ( !defined($entries) ); + my @names = map { $_->{name} } @$entries; + return \@names; +} + +sub find +{ + my($bpc, $param, $dir, $dontDoCwd) = @_; + + return if ( !chdir($dir) ); + my $entries = $bpc->dirRead(".", {inode => 1, type => 1}); + #print Dumper($entries); + foreach my $f ( @$entries ) { + next if ( $f->{name} eq ".." || $f->{name} eq "." && $dontDoCwd ); + $param->{wanted}($f->{name}, "$dir/$f->{name}"); + next if ( $f->{type} != BPC_DT_DIR || $f->{name} eq "." ); + chdir($f->{name}); + $bpc->find($param, "$dir/$f->{name}", 1); + return if ( !chdir("..") ); + } +} + # # Stripped down from File::Path. In particular we don't print # many warnings and we try three times to delete each directory # and file -- for some reason the original File::Path rmtree -# didn't always completely remove a directory tree on the NetApp. +# didn't always completely remove a directory tree on a NetApp. # # Warning: this routine changes the cwd. # @@ -433,13 +592,11 @@ sub RmTreeQuiet # if ( !unlink($root) ) { if ( -d $root ) { - my $d = DirHandle->new($root); + my $d = $bpc->dirReadNames($root); if ( !defined($d) ) { print(STDERR "Can't read $pwd/$root: $!\n"); } else { - @files = $d->read; - $d->close; - @files = grep $_!~/^\.{1,2}$/, @files; + @files = grep $_ !~ /^\.{1,2}$/, @$d; $bpc->RmTreeQuiet("$pwd/$root", \@files); chdir($pwd); rmdir($root) || rmdir($root); @@ -490,10 +647,8 @@ sub RmTreeTrashEmpty $cwd = $1 if ( $cwd =~ /(.*)/ ); return if ( !-d $trashDir ); - my $d = DirHandle->new($trashDir) or carp "Can't read $trashDir: $!"; - @files = $d->read; - $d->close; - @files = grep $_!~/^\.{1,2}$/, @files; + my $d = $bpc->dirReadNames($trashDir) or carp "Can't read $trashDir: $!"; + @files = grep $_ !~ /^\.{1,2}$/, @$d; return 0 if ( !@files ); $bpc->RmTreeQuiet($trashDir, \@files); foreach my $f ( @files ) { @@ -590,7 +745,10 @@ sub ServerMesg { my($bpc, $mesg) = @_; return if ( !defined(my $fh = $bpc->{ServerFD}) ); + $mesg =~ s/\n/\\n/g; + $mesg =~ s/\r/\\r/g; my $md5 = Digest::MD5->new; + $mesg = encode_utf8($mesg); $md5->add($bpc->{ServerSeed} . $bpc->{ServerMesgCnt} . $bpc->{Conf}{ServerMesgSecret} . $mesg); print($fh $md5->b64digest . " $mesg\n"); @@ -747,6 +905,33 @@ sub MakeFileLink } } +# +# Tests if we can create a hardlink from a file in directory +# $newDir to a file in directory $targetDir. A temporary +# file in $targetDir is created and an attempt to create a +# hardlink of the same name in $newDir is made. The temporary +# files are removed. +# +# Like link(), returns true on success and false on failure. +# +sub HardlinkTest +{ + my($bpc, $targetDir, $newDir) = @_; + + my($targetFile, $newFile, $fd); + for ( my $i = 0 ; ; $i++ ) { + $targetFile = "$targetDir/.TestFileLink.$$.$i"; + $newFile = "$newDir/.TestFileLink.$$.$i"; + last if ( !-e $targetFile && !-e $newFile ); + } + return 0 if ( !open($fd, ">", $targetFile) ); + close($fd); + my $ret = link($targetFile, $newFile); + unlink($targetFile); + unlink($newFile); + return $ret; +} + sub CheckHostAlive { my($bpc, $host) = @_;