X-Git-Url: http://git.rot13.org/?p=BackupPC.git;a=blobdiff_plain;f=lib%2FBackupPC%2FLib.pm;h=cb66a106ff6900381a961c9ac486a30c3f8fb0ae;hp=48c4766b04641382cba85ca10af71cf5e8c91a65;hb=ca593f66fd6c35764bd8997c6338b781330f019c;hpb=27f513f89d885d24bf1a01242fba676c7a840fd5 diff --git a/lib/BackupPC/Lib.pm b/lib/BackupPC/Lib.pm index 48c4766..cb66a10 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) 2001-2009 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 3.0.0alpha, released 23 Jan 2006. +# Version 3.2.0beta0, released 5 April 2009. # # See http://backuppc.sourceforge.net. # @@ -41,15 +41,51 @@ 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 $IODirentLoaded ); +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 );"; + $IODirentLoaded = 1 if ( !$@ ); +}; + +# +# 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 { @@ -66,7 +102,7 @@ sub new # # Set defaults for $topDir and $installDir. # - $topDir = '/tera0/backup/BackupPC' if ( $topDir eq "" ); + $topDir = '/data/BackupPC' if ( $topDir eq "" ); $installDir = '/usr/local/BackupPC' if ( $installDir eq "" ); # @@ -79,7 +115,7 @@ sub new useFHS => $useFHS, TopDir => $topDir, InstallDir => $installDir, - ConfDir => $confDir eq "" ? '/etc/BackupPC' : $confDir, + ConfDir => $confDir eq "" ? '/data/BackupPC/conf' : $confDir, LogDir => '/var/log/BackupPC', }; } else { @@ -94,7 +130,7 @@ sub new my $bpc = bless { %$paths, - Version => '3.0.0alpha', + Version => '3.2.0beta0', }, $class; $bpc->{storage} = BackupPC::Storage->new($paths); @@ -103,8 +139,6 @@ sub new # Clean up %ENV and setup other variables. # delete @ENV{qw(IFS CDPATH ENV BASH_ENV)}; - $bpc->{PoolDir} = "$bpc->{TopDir}/pool"; - $bpc->{CPoolDir} = "$bpc->{TopDir}/cpool"; if ( defined(my $error = $bpc->ConfigRead()) ) { print(STDERR $error, "\n"); return; @@ -118,6 +152,8 @@ sub new $paths->{$dir} = $bpc->{$dir} = $bpc->{Conf}{$dir}; } $bpc->{storage}->setPaths($paths); + $bpc->{PoolDir} = "$bpc->{TopDir}/pool"; + $bpc->{CPoolDir} = "$bpc->{TopDir}/cpool"; # # Verify we are running as the correct user @@ -125,8 +161,9 @@ sub new if ( !$noUserCheck && $bpc->{Conf}{BackupPCUserVerify} && $> != (my $uid = (getpwnam($bpc->{Conf}{BackupPCUser}))[2]) ) { - print(STDERR "Wrong user: my userid is $>, instead of $uid" + print(STDERR "$0: Wrong user: my userid is $>, instead of $uid" . " ($bpc->{Conf}{BackupPCUser})\n"); + print(STDERR "Please su $bpc->{Conf}{BackupPCUser} first\n"); return; } return $bpc; @@ -327,9 +364,9 @@ sub ConfigRead # Read host config file # if ( $host ne "" ) { - ($mesg, $config) = $bpc->{storage}->ConfigDataRead($host); + ($mesg, $config) = $bpc->{storage}->ConfigDataRead($host, $config); return $mesg if ( defined($mesg) ); - $bpc->{Conf} = { %{$bpc->{Conf}}, %$config }; + $bpc->{Conf} = $config; } # @@ -359,6 +396,12 @@ sub ConfigRead return $mesg; } $bpc->{Lang} = \%Lang; + + # + # Make sure IncrLevels is defined + # + $bpc->{Conf}{IncrLevels} = [1] if ( !defined($bpc->{Conf}{IncrLevels}) ); + return; } @@ -403,11 +446,135 @@ 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 ( $IODirentLoaded && !$IODirentOk ) { + # + # Make sure the IO::Dirent really works - some installs + # on certain file systems (eg: XFS) don't return a valid type. + # + if ( opendir(my $fh, $bpc->{TopDir}) ) { + my $dt_dir = eval("DT_DIR"); + foreach my $e ( readdirent($fh) ) { + if ( $e->{name} eq "." && $e->{type} == $dt_dir ) { + $IODirentOk = 1; + last; + } + } + closedir($fh); + } + # + # if it isn't ok then don't check again. + # + $IODirentLoaded = 0 if ( !$IODirentOk ); + } + 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. # @@ -432,13 +599,11 @@ 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); @@ -459,7 +624,15 @@ sub RmTreeDefer my($i, $f); return if ( !-e $file ); - mkpath($trashDir, 0, 0777) if ( !-d $trashDir ); + if ( !-d $trashDir ) { + eval { mkpath($trashDir, 0, 0777) }; + if ( $@ ) { + # + # There's no good place to send this error - use stderr + # + print(STDERR "RmTreeDefer: can't create directory $trashDir"); + } + } for ( $i = 0 ; $i < 1000 ; $i++ ) { $f = sprintf("%s/%d_%d_%d", $trashDir, time, $$, $i); next if ( -e $f ); @@ -489,10 +662,8 @@ sub RmTreeTrashEmpty $cwd = $1 if ( $cwd =~ /(.*)/ ); return if ( !-d $trashDir ); - my $d = DirHandle->new($trashDir) or carp "Can't read $trashDir: $!"; - @files = $d->read; - $d->close; - @files = grep $_!~/^\.{1,2}$/, @files; + my $d = $bpc->dirReadNames($trashDir) or carp "Can't read $trashDir: $!"; + @files = grep $_ !~ /^\.{1,2}$/, @$d; return 0 if ( !@files ); $bpc->RmTreeQuiet($trashDir, \@files); foreach my $f ( @files ) { @@ -589,7 +760,10 @@ sub ServerMesg { my($bpc, $mesg) = @_; return if ( !defined(my $fh = $bpc->{ServerFD}) ); + $mesg =~ s/\n/\\n/g; + $mesg =~ s/\r/\\r/g; my $md5 = Digest::MD5->new; + $mesg = encode_utf8($mesg); $md5->add($bpc->{ServerSeed} . $bpc->{ServerMesgCnt} . $bpc->{Conf}{ServerMesgSecret} . $mesg); print($fh $md5->b64digest . " $mesg\n"); @@ -737,7 +911,10 @@ sub MakeFileLink } elsif ( $newFile && -f $name && (stat($name))[3] == 1 ) { my($newDir); ($newDir = $rawFile) =~ s{(.*)/.*}{$1}; - mkpath($newDir, 0, 0777) if ( !-d $newDir ); + if ( !-d $newDir ) { + eval { mkpath($newDir, 0, 0777) }; + return -5 if ( $@ ); + } return -4 if ( !link($name, $rawFile) ); return 2; } else { @@ -746,6 +923,33 @@ sub MakeFileLink } } +# +# Tests if we can create a hardlink from a file in directory +# $newDir to a file in directory $targetDir. A temporary +# file in $targetDir is created and an attempt to create a +# hardlink of the same name in $newDir is made. The temporary +# files are removed. +# +# Like link(), returns true on success and false on failure. +# +sub HardlinkTest +{ + my($bpc, $targetDir, $newDir) = @_; + + my($targetFile, $newFile, $fd); + for ( my $i = 0 ; ; $i++ ) { + $targetFile = "$targetDir/.TestFileLink.$$.$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) = @_; @@ -842,6 +1046,10 @@ sub NetBiosInfoGet }; $nmbCmd = $bpc->cmdVarSubstitute($bpc->{Conf}{NmbLookupCmd}, $args); foreach ( split(/[\n\r]+/, $bpc->cmdSystemOrEval($nmbCmd, undef, $args)) ) { + # + # skip and other non entries + # + next if ( /<\w{2}> - /i ); next if ( !/^\s*([\w\s-]+?)\s*<(\w{2})\> - .*/i ); $netBiosHostName ||= $1 if ( $2 eq "00" ); # host is first 00 $netBiosUserName = $1 if ( $2 eq "03" ); # user is last 03 @@ -1025,22 +1233,27 @@ sub cmdVarSubstitute } } # - # Merge variables into @tarClientCmd + # Merge variables into @cmd # foreach my $arg ( @$template ) { + # + # Replace $VAR with ${VAR} so that both types of variable + # substitution are supported + # + $arg =~ s[\$(\w+)]{\${$1}}g; # # Replace scalar variables first # - $arg =~ s{\$(\w+)(\+?)}{ + $arg =~ s[\${(\w+)}(\+?)]{ exists($vars->{$1}) && ref($vars->{$1}) ne "ARRAY" ? ($2 eq "+" ? $bpc->shellEscape($vars->{$1}) : $vars->{$1}) - : "\$$1$2" + : "\${$1}$2" }eg; # # Now replicate any array arguments; this just works for just one # array var in each argument. # - if ( $arg =~ m{(.*)\$(\w+)(\+?)(.*)} && ref($vars->{$2}) eq "ARRAY" ) { + if ( $arg =~ m[(.*)\${(\w+)}(\+?)(.*)] && ref($vars->{$2}) eq "ARRAY" ) { my $pre = $1; my $var = $2; my $esc = $3; @@ -1107,6 +1320,7 @@ sub cmdSystemOrEvalLong my($pid, $out, $allOut); local(*CHILD); + $? = 0; if ( (ref($cmd) eq "ARRAY" ? $cmd->[0] : $cmd) =~ /^\&/ ) { $cmd = join(" ", $cmd) if ( ref($cmd) eq "ARRAY" ); print(STDERR "cmdSystemOrEval: about to eval perl code $cmd\n") @@ -1218,4 +1432,98 @@ sub backupFileConfFix } } +# +# This is sort() compare function, used below. +# +# New client LOG names are LOG.MMYYYY. Old style names are +# LOG, LOG.0, LOG.1 etc. Sort them so new names are +# first, and newest to oldest. +# +sub compareLOGName +{ + my $na = $1 if ( $a =~ /LOG\.(\d+)(\.z)?$/ ); + my $nb = $1 if ( $b =~ /LOG\.(\d+)(\.z)?$/ ); + + $na = -1 if ( !defined($na) ); + $nb = -1 if ( !defined($nb) ); + + if ( length($na) >= 5 && length($nb) >= 5 ) { + # + # Both new style: format is MMYYYY. Bigger dates are + # more recent. + # + my $ma = $2 * 12 + $1 if ( $na =~ /(\d+)(\d{4})/ ); + my $mb = $2 * 12 + $1 if ( $nb =~ /(\d+)(\d{4})/ ); + return $mb - $ma; + } elsif ( length($na) >= 5 && length($nb) < 5 ) { + return -1; + } elsif ( length($na) < 5 && length($nb) >= 5 ) { + return 1; + } else { + # + # Both old style. Smaller numbers are more recent. + # + return $na - $nb; + } +} + +# +# Returns list of paths to a clients's (or main) LOG files, +# most recent first. +# +sub sortedPCLogFiles +{ + my($bpc, $host) = @_; + + my(@files, $dir); + + if ( $host ne "" ) { + $dir = "$bpc->{TopDir}/pc/$host"; + } else { + $dir = "$bpc->{LogDir}"; + } + if ( opendir(DIR, $dir) ) { + foreach my $file ( readdir(DIR) ) { + next if ( !-f "$dir/$file" ); + next if ( $file ne "LOG" && $file !~ /^LOG\.\d/ ); + push(@files, "$dir/$file"); + } + closedir(DIR); + } + return sort compareLOGName @files; +} + +# +# converts a glob-style pattern into a perl regular expression. +# +sub glob2re +{ + my ( $bpc, $glob ) = @_; + my ( $char, $subst ); + + # $escapeChars escapes characters with no special glob meaning but + # have meaning in regexps. + my $escapeChars = [ '.', '/', ]; + + # $charMap is where we implement the special meaning of glob + # patterns and translate them to regexps. + my $charMap = { + '?' => '[^/]', + '*' => '[^/]*', }; + + # multiple forward slashes are equivalent to one slash. We should + # never have to use this. + $glob =~ s/\/+/\//; + + foreach $char (@$escapeChars) { + $glob =~ s/\Q$char\E/\\$char/g; + } + + while ( ( $char, $subst ) = each(%$charMap) ) { + $glob =~ s/(?