1 #============================================================= -*-perl-*-
3 # BackupPC::Lib package
7 # This library defines a BackupPC::Lib class and a variety of utility
8 # functions used by BackupPC.
11 # Craig Barratt <cbarratt@users.sourceforge.net>
14 # Copyright (C) 2001-2007 Craig Barratt
16 # This program is free software; you can redistribute it and/or modify
17 # it under the terms of the GNU General Public License as published by
18 # the Free Software Foundation; either version 2 of the License, or
19 # (at your option) any later version.
21 # This program is distributed in the hope that it will be useful,
22 # but WITHOUT ANY WARRANTY; without even the implied warranty of
23 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 # GNU General Public License for more details.
26 # You should have received a copy of the GNU General Public License
27 # along with this program; if not, write to the Free Software
28 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #========================================================================
32 # Version 3.2.0, released 31 Dec 2008.
34 # See http://backuppc.sourceforge.net.
36 #========================================================================
38 package BackupPC::Lib;
42 use vars qw(%Conf %Lang);
43 use BackupPC::Storage;
52 use Encode qw/from_to encode_utf8/;
54 use vars qw( $IODirentOk $IODirentLoaded );
55 use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
60 @ISA = qw(Exporter DynaLoader);
61 @EXPORT_OK = qw( BPC_DT_UNKNOWN
71 %EXPORT_TAGS = ('BPC_DT_ALL' => [@EXPORT, @EXPORT_OK]);
74 eval "use IO::Dirent qw( readdirent DT_DIR );";
75 $IODirentLoaded = 1 if ( !$@ );
79 # The need to match the constants in IO::Dirent
81 use constant BPC_DT_UNKNOWN => 0;
82 use constant BPC_DT_FIFO => 1; ## named pipe (fifo)
83 use constant BPC_DT_CHR => 2; ## character special
84 use constant BPC_DT_DIR => 4; ## directory
85 use constant BPC_DT_BLK => 6; ## block special
86 use constant BPC_DT_REG => 8; ## regular
87 use constant BPC_DT_LNK => 10; ## symbolic link
88 use constant BPC_DT_SOCK => 12; ## socket
93 my($topDir, $installDir, $confDir, $noUserCheck) = @_;
96 # Whether to use filesystem hierarchy standard for file layout.
97 # If set, text config files are below /etc/BackupPC.
103 # Set defaults for $topDir and $installDir.
105 $topDir = '/data/BackupPC' if ( $topDir eq "" );
106 $installDir = '/usr/local/BackupPC' if ( $installDir eq "" );
109 # Pick some initial defaults. For FHS the only critical
110 # path is the ConfDir, since we get everything else out
111 # of the main config file.
117 InstallDir => $installDir,
118 ConfDir => $confDir eq "" ? '/data/BackupPC/conf' : $confDir,
119 LogDir => '/var/log/BackupPC',
125 InstallDir => $installDir,
126 ConfDir => $confDir eq "" ? "$topDir/conf" : $confDir,
127 LogDir => "$topDir/log",
136 $bpc->{storage} = BackupPC::Storage->new($paths);
139 # Clean up %ENV and setup other variables.
141 delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};
142 if ( defined(my $error = $bpc->ConfigRead()) ) {
143 print(STDERR $error, "\n");
148 # Update the paths based on the config file
150 foreach my $dir ( qw(TopDir ConfDir InstallDir LogDir) ) {
151 next if ( $bpc->{Conf}{$dir} eq "" );
152 $paths->{$dir} = $bpc->{$dir} = $bpc->{Conf}{$dir};
154 $bpc->{storage}->setPaths($paths);
155 $bpc->{PoolDir} = "$bpc->{TopDir}/pool";
156 $bpc->{CPoolDir} = "$bpc->{TopDir}/cpool";
159 # Verify we are running as the correct user
162 && $bpc->{Conf}{BackupPCUserVerify}
163 && $> != (my $uid = (getpwnam($bpc->{Conf}{BackupPCUser}))[2]) ) {
164 print(STDERR "$0: Wrong user: my userid is $>, instead of $uid"
165 . " ($bpc->{Conf}{BackupPCUser})\n");
166 print(STDERR "Please su $bpc->{Conf}{BackupPCUser} first\n");
175 return $bpc->{TopDir};
181 return "$bpc->{InstallDir}/bin";
187 return $bpc->{LogDir};
193 return $bpc->{ConfDir};
199 return "$bpc->{InstallDir}/lib";
205 return $bpc->{InstallDir};
211 return $bpc->{useFHS};
217 return $bpc->{Version};
223 return %{$bpc->{Conf}};
235 return " admin " if ( !$num );
236 return " admin$num ";
242 return $str =~ /^ admin/;
247 return " trashClean ";
252 my($bpc, $param) = @_;
254 return $bpc->{Conf}{$param};
259 my($bpc, $param) = @_;
261 $bpc->{verbose} = $param if ( defined($param) );
262 return $bpc->{verbose};
269 if ( !defined($bpc->{SigName2Num}) ) {
271 foreach my $name ( split(' ', $Config{sig_name}) ) {
272 $bpc->{SigName2Num}{$name} = $i;
276 return $bpc->{SigName2Num}{$sig};
280 # Generate an ISO 8601 format timeStamp (but without the "T").
281 # See http://www.w3.org/TR/NOTE-datetime and
282 # http://www.cl.cam.ac.uk/~mgk25/iso-time.html
286 my($bpc, $t, $noPad) = @_;
287 my($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst)
288 = localtime($t || time);
289 return sprintf("%04d-%02d-%02d %02d:%02d:%02d",
290 $year + 1900, $mon + 1, $mday, $hour, $min, $sec)
291 . ($noPad ? "" : " ");
296 my($bpc, $host) = @_;
298 return $bpc->{storage}->BackupInfoRead($host);
303 my($bpc, $host, @Backups) = @_;
305 return $bpc->{storage}->BackupInfoWrite($host, @Backups);
310 my($bpc, $host) = @_;
312 return $bpc->{storage}->RestoreInfoRead($host);
317 my($bpc, $host, @Restores) = @_;
319 return $bpc->{storage}->RestoreInfoWrite($host, @Restores);
324 my($bpc, $host) = @_;
326 return $bpc->{storage}->ArchiveInfoRead($host);
331 my($bpc, $host, @Archives) = @_;
333 return $bpc->{storage}->ArchiveInfoWrite($host, @Archives);
338 my($bpc, $host) = @_;
340 return $bpc->{storage}->ConfigDataRead($host);
345 my($bpc, $host, $conf) = @_;
347 return $bpc->{storage}->ConfigDataWrite($host, $conf);
352 my($bpc, $host) = @_;
356 # Read main config file
358 my($mesg, $config) = $bpc->{storage}->ConfigDataRead();
359 return $mesg if ( defined($mesg) );
361 $bpc->{Conf} = $config;
364 # Read host config file
367 ($mesg, $config) = $bpc->{storage}->ConfigDataRead($host);
368 return $mesg if ( defined($mesg) );
369 $bpc->{Conf} = { %{$bpc->{Conf}}, %$config };
373 # Load optional perl modules
375 if ( defined($bpc->{Conf}{PerlModuleLoad}) ) {
377 # Load any user-specified perl modules. This is for
378 # optional user-defined extensions.
380 $bpc->{Conf}{PerlModuleLoad} = [$bpc->{Conf}{PerlModuleLoad}]
381 if ( ref($bpc->{Conf}{PerlModuleLoad}) ne "ARRAY" );
382 foreach my $module ( @{$bpc->{Conf}{PerlModuleLoad}} ) {
383 eval("use $module;");
390 return "No language setting" if ( !defined($bpc->{Conf}{Language}) );
391 my $langFile = "$bpc->{InstallDir}/lib/BackupPC/Lang/$bpc->{Conf}{Language}.pm";
392 if ( !defined($ret = do $langFile) && ($! || $@) ) {
393 $mesg = "Couldn't open language file $langFile: $!" if ( $! );
394 $mesg = "Couldn't execute language file $langFile: $@" if ( $@ );
395 $mesg =~ s/[\n\r]+//;
398 $bpc->{Lang} = \%Lang;
401 # Make sure IncrLevels is defined
403 $bpc->{Conf}{IncrLevels} = [1] if ( !defined($bpc->{Conf}{IncrLevels}) );
409 # Return the mtime of the config file
415 return $bpc->{storage}->ConfigMTime();
419 # Returns information from the host file in $bpc->{TopDir}/conf/hosts.
420 # With no argument a ref to a hash of hosts is returned. Each
421 # hash contains fields as specified in the hosts file. With an
422 # argument a ref to a single hash is returned with information
423 # for just that host.
427 my($bpc, $host) = @_;
429 return $bpc->{storage}->HostInfoRead($host);
434 my($bpc, $host) = @_;
436 return $bpc->{storage}->HostInfoWrite($host);
440 # Return the mtime of the hosts file
446 return $bpc->{storage}->HostsMTime();
450 # Read a directory and return the entries in sorted inode order.
451 # This relies on the IO::Dirent module being installed. If not,
452 # the inode data is empty and the default directory order is
455 # The returned data is a list of hashes with entries {name, type, inode, nlink}.
456 # The returned data includes "." and "..".
458 # $need is a hash of file attributes we need: type, inode, or nlink.
459 # If set, these parameters are added to the returned hash.
461 # To support browsing pre-3.0.0 backups where the charset encoding
462 # is typically iso-8859-1, the charsetLegacy option can be set in
463 # $need to convert the path from utf8 and convert the names to utf8.
465 # If IO::Dirent is successful if will get type and inode for free.
466 # Otherwise, a stat is done on each file, which is more expensive.
470 my($bpc, $path, $need) = @_;
471 my(@entries, $addInode);
473 from_to($path, "utf8", $need->{charsetLegacy})
474 if ( $need->{charsetLegacy} ne "" );
475 return if ( !opendir(my $fh, $path) );
476 if ( $IODirentLoaded && !$IODirentOk ) {
478 # Make sure the IO::Dirent really works - some installs
479 # on certain file systems (eg: XFS) don't return a valid type.
481 if ( opendir(my $fh, $bpc->{TopDir}) ) {
482 my $dt_dir = eval("DT_DIR");
483 foreach my $e ( readdirent($fh) ) {
484 if ( $e->{name} eq "." && $e->{type} == $dt_dir ) {
492 # if it isn't ok then don't check again.
494 $IODirentLoaded = 0 if ( !$IODirentOk );
497 @entries = sort({ $a->{inode} <=> $b->{inode} } readdirent($fh));
498 map { $_->{type} = 0 + $_->{type} } @entries; # make type numeric
500 @entries = map { { name => $_} } readdir($fh);
503 if ( defined($need) ) {
504 for ( my $i = 0 ; $i < @entries ; $i++ ) {
505 next if ( (!$need->{inode} || defined($entries[$i]{inode}))
506 && (!$need->{type} || defined($entries[$i]{type}))
507 && (!$need->{nlink} || defined($entries[$i]{nlink})) );
508 my @s = stat("$path/$entries[$i]{name}");
509 $entries[$i]{nlink} = $s[3] if ( $need->{nlink} );
510 if ( $need->{inode} && !defined($entries[$i]{inode}) ) {
512 $entries[$i]{inode} = $s[1];
514 if ( $need->{type} && !defined($entries[$i]{type}) ) {
515 my $mode = S_IFMT($s[2]);
516 $entries[$i]{type} = BPC_DT_FIFO if ( S_ISFIFO($mode) );
517 $entries[$i]{type} = BPC_DT_CHR if ( S_ISCHR($mode) );
518 $entries[$i]{type} = BPC_DT_DIR if ( S_ISDIR($mode) );
519 $entries[$i]{type} = BPC_DT_BLK if ( S_ISBLK($mode) );
520 $entries[$i]{type} = BPC_DT_REG if ( S_ISREG($mode) );
521 $entries[$i]{type} = BPC_DT_LNK if ( S_ISLNK($mode) );
522 $entries[$i]{type} = BPC_DT_SOCK if ( S_ISSOCK($mode) );
527 # Sort the entries if inodes were added (the IO::Dirent case already
530 @entries = sort({ $a->{inode} <=> $b->{inode} } @entries) if ( $addInode );
532 # for browing pre-3.0.0 backups, map iso-8859-1 to utf8 if requested
534 if ( $need->{charsetLegacy} ne "" ) {
535 for ( my $i = 0 ; $i < @entries ; $i++ ) {
536 from_to($entries[$i]{name}, $need->{charsetLegacy}, "utf8");
543 # Same as dirRead, but only returns the names (which will be sorted in
544 # inode order if IO::Dirent is installed)
548 my($bpc, $path, $need) = @_;
550 my $entries = $bpc->dirRead($path, $need);
551 return if ( !defined($entries) );
552 my @names = map { $_->{name} } @$entries;
558 my($bpc, $param, $dir, $dontDoCwd) = @_;
560 return if ( !chdir($dir) );
561 my $entries = $bpc->dirRead(".", {inode => 1, type => 1});
562 #print Dumper($entries);
563 foreach my $f ( @$entries ) {
564 next if ( $f->{name} eq ".." || $f->{name} eq "." && $dontDoCwd );
565 $param->{wanted}($f->{name}, "$dir/$f->{name}");
566 next if ( $f->{type} != BPC_DT_DIR || $f->{name} eq "." );
568 $bpc->find($param, "$dir/$f->{name}", 1);
569 return if ( !chdir("..") );
574 # Stripped down from File::Path. In particular we don't print
575 # many warnings and we try three times to delete each directory
576 # and file -- for some reason the original File::Path rmtree
577 # didn't always completely remove a directory tree on a NetApp.
579 # Warning: this routine changes the cwd.
583 my($bpc, $pwd, $roots) = @_;
586 if ( defined($roots) && length($roots) ) {
587 $roots = [$roots] unless ref $roots;
589 print(STDERR "RmTreeQuiet: No root path(s) specified\n");
592 foreach $root (@{$roots}) {
593 $root = $1 if ( $root =~ m{(.*?)/*$} );
595 # Try first to simply unlink the file: this avoids an
596 # extra stat for every file. If it fails (which it
597 # will for directories), check if it is a directory and
600 if ( !unlink($root) ) {
602 my $d = $bpc->dirReadNames($root);
603 if ( !defined($d) ) {
604 print(STDERR "Can't read $pwd/$root: $!\n");
606 @files = grep $_ !~ /^\.{1,2}$/, @$d;
607 $bpc->RmTreeQuiet("$pwd/$root", \@files);
609 rmdir($root) || rmdir($root);
612 unlink($root) || unlink($root);
619 # Move a directory or file away for later deletion
623 my($bpc, $trashDir, $file) = @_;
626 return if ( !-e $file );
627 mkpath($trashDir, 0, 0777) if ( !-d $trashDir );
628 for ( $i = 0 ; $i < 1000 ; $i++ ) {
629 $f = sprintf("%s/%d_%d_%d", $trashDir, time, $$, $i);
631 return if ( rename($file, $f) );
633 # shouldn't get here, but might if you tried to call this
634 # across file systems.... just remove the tree right now.
635 if ( $file =~ /(.*)\/([^\/]*)/ ) {
638 my($cwd) = Cwd::fastcwd();
639 $cwd = $1 if ( $cwd =~ /(.*)/ );
640 $bpc->RmTreeQuiet($d, $f);
641 chdir($cwd) if ( $cwd );
646 # Empty the trash directory. Returns 0 if it did nothing, 1 if it
647 # did something, -1 if it failed to remove all the files.
651 my($bpc, $trashDir) = @_;
653 my($cwd) = Cwd::fastcwd();
655 $cwd = $1 if ( $cwd =~ /(.*)/ );
656 return if ( !-d $trashDir );
657 my $d = $bpc->dirReadNames($trashDir) or carp "Can't read $trashDir: $!";
658 @files = grep $_ !~ /^\.{1,2}$/, @$d;
659 return 0 if ( !@files );
660 $bpc->RmTreeQuiet($trashDir, \@files);
661 foreach my $f ( @files ) {
662 return -1 if ( -e $f );
664 chdir($cwd) if ( $cwd );
669 # Open a connection to the server. Returns an error string on failure.
670 # Returns undef on success.
674 my($bpc, $host, $port, $justConnect) = @_;
677 return if ( defined($bpc->{ServerFD}) );
679 # First try the unix-domain socket
681 my $sockFile = "$bpc->{LogDir}/BackupPC.sock";
682 socket(*FH, PF_UNIX, SOCK_STREAM, 0) || return "unix socket: $!";
683 if ( !connect(*FH, sockaddr_un($sockFile)) ) {
684 my $err = "unix connect: $!";
687 my $proto = getprotobyname('tcp');
688 my $iaddr = inet_aton($host) || return "unknown host $host";
689 my $paddr = sockaddr_in($port, $iaddr);
691 socket(*FH, PF_INET, SOCK_STREAM, $proto)
692 || return "inet socket: $!";
693 connect(*FH, $paddr) || return "inet connect: $!";
698 my($oldFH) = select(*FH); $| = 1; select($oldFH);
699 $bpc->{ServerFD} = *FH;
700 return if ( $justConnect );
702 # Read the seed that we need for our MD5 message digest. See
705 sysread($bpc->{ServerFD}, $bpc->{ServerSeed}, 1024);
706 $bpc->{ServerMesgCnt} = 0;
711 # Check that the server connection is still ok
717 return 0 if ( !defined($bpc->{ServerFD}) );
718 vec(my $FDread, fileno($bpc->{ServerFD}), 1) = 1;
720 return 0 if ( select(my $rout = $FDread, undef, $ein, 0.0) < 0 );
721 return 1 if ( !vec($rout, fileno($bpc->{ServerFD}), 1) );
725 # Disconnect from the server
730 return if ( !defined($bpc->{ServerFD}) );
731 close($bpc->{ServerFD});
732 delete($bpc->{ServerFD});
736 # Sends a message to the server and returns with the reply.
738 # To avoid possible attacks via the TCP socket interface, every client
739 # message is protected by an MD5 digest. The MD5 digest includes four
741 # - a seed that is sent to us when we first connect
742 # - a sequence number that increments for each message
743 # - a shared secret that is stored in $Conf{ServerMesgSecret}
744 # - the message itself.
745 # The message is sent in plain text preceded by the MD5 digest. A
746 # snooper can see the plain-text seed sent by BackupPC and plain-text
747 # message, but cannot construct a valid MD5 digest since the secret in
748 # $Conf{ServerMesgSecret} is unknown. A replay attack is not possible
749 # since the seed changes on a per-connection and per-message basis.
753 my($bpc, $mesg) = @_;
754 return if ( !defined(my $fh = $bpc->{ServerFD}) );
757 my $md5 = Digest::MD5->new;
758 $mesg = encode_utf8($mesg);
759 $md5->add($bpc->{ServerSeed} . $bpc->{ServerMesgCnt}
760 . $bpc->{Conf}{ServerMesgSecret} . $mesg);
761 print($fh $md5->b64digest . " $mesg\n");
762 $bpc->{ServerMesgCnt}++;
767 # Do initialization for child processes
773 open(STDERR, ">&STDOUT");
774 select(STDERR); $| = 1;
775 select(STDOUT); $| = 1;
776 $ENV{PATH} = $bpc->{Conf}{MyPath};
780 # Compute the MD5 digest of a file. For efficiency we don't
781 # use the whole file for big files:
782 # - for files <= 256K we use the file size and the whole file.
783 # - for files <= 1M we use the file size, the first 128K and
785 # - for files > 1M, we use the file size, the first 128K and
786 # the 8th 128K (ie: the 128K up to 1MB).
787 # See the documentation for a discussion of the tradeoffs in
788 # how much data we use and how many collisions we get.
790 # Returns the MD5 digest (a hex string) and the file size.
794 my($bpc, $md5, $name) = @_;
795 my($data, $fileSize);
798 $fileSize = (stat($name))[7];
799 return ("", -1) if ( !-f _ );
800 $name = $1 if ( $name =~ /(.*)/ );
801 return ("", 0) if ( $fileSize == 0 );
802 return ("", -1) if ( !open(N, $name) );
805 $md5->add($fileSize);
806 if ( $fileSize > 262144 ) {
808 # read the first and last 131072 bytes of the file,
811 my $seekPosn = ($fileSize > 1048576 ? 1048576 : $fileSize) - 131072;
812 $md5->add($data) if ( sysread(N, $data, 131072) );
813 $md5->add($data) if ( sysseek(N, $seekPosn, 0)
814 && sysread(N, $data, 131072) );
817 # read the whole file
819 $md5->add($data) if ( sysread(N, $data, $fileSize) );
822 return ($md5->hexdigest, $fileSize);
826 # Compute the MD5 digest of a buffer (string). For efficiency we don't
827 # use the whole string for big strings:
828 # - for files <= 256K we use the file size and the whole file.
829 # - for files <= 1M we use the file size, the first 128K and
831 # - for files > 1M, we use the file size, the first 128K and
832 # the 8th 128K (ie: the 128K up to 1MB).
833 # See the documentation for a discussion of the tradeoffs in
834 # how much data we use and how many collisions we get.
836 # Returns the MD5 digest (a hex string).
840 my($bpc, $md5, $fileSize, $dataRef) = @_;
843 $md5->add($fileSize);
844 if ( $fileSize > 262144 ) {
846 # add the first and last 131072 bytes of the string,
849 my $seekPosn = ($fileSize > 1048576 ? 1048576 : $fileSize) - 131072;
850 $md5->add(substr($$dataRef, 0, 131072));
851 $md5->add(substr($$dataRef, $seekPosn, 131072));
854 # add the whole string
856 $md5->add($$dataRef);
858 return $md5->hexdigest;
862 # Given an MD5 digest $d and a compress flag, return the full
867 my($bpc, $d, $compress, $poolDir) = @_;
869 return if ( $d !~ m{(.)(.)(.)(.*)} );
870 $poolDir = ($compress ? $bpc->{CPoolDir} : $bpc->{PoolDir})
871 if ( !defined($poolDir) );
872 return "$poolDir/$1/$2/$3/$1$2$3$4";
876 # For each file, check if the file exists in $bpc->{TopDir}/pool.
877 # If so, remove the file and make a hardlink to the file in
878 # the pool. Otherwise, if the newFile flag is set, make a
879 # hardlink in the pool to the new file.
881 # Returns 0 if a link should be made to a new file (ie: when the file
882 # is a new file but the newFile flag is 0).
883 # Returns 1 if a link to an existing file is made,
884 # Returns 2 if a link to a new file is made (only if $newFile is set)
885 # Returns negative on error.
889 my($bpc, $name, $d, $newFile, $compress) = @_;
892 return -1 if ( !-f $name );
893 for ( $i = -1 ; ; $i++ ) {
894 return -2 if ( !defined($rawFile = $bpc->MD52Path($d, $compress)) );
895 $rawFile .= "_$i" if ( $i >= 0 );
897 if ( (stat(_))[3] < $bpc->{Conf}{HardLinkMax}
898 && !compare($name, $rawFile) ) {
900 return -3 if ( !link($rawFile, $name) );
903 } elsif ( $newFile && -f $name && (stat($name))[3] == 1 ) {
905 ($newDir = $rawFile) =~ s{(.*)/.*}{$1};
906 mkpath($newDir, 0, 0777) if ( !-d $newDir );
907 return -4 if ( !link($name, $rawFile) );
916 # Tests if we can create a hardlink from a file in directory
917 # $newDir to a file in directory $targetDir. A temporary
918 # file in $targetDir is created and an attempt to create a
919 # hardlink of the same name in $newDir is made. The temporary
922 # Like link(), returns true on success and false on failure.
926 my($bpc, $targetDir, $newDir) = @_;
928 my($targetFile, $newFile, $fd);
929 for ( my $i = 0 ; ; $i++ ) {
930 $targetFile = "$targetDir/.TestFileLink.$$.$i";
931 $newFile = "$newDir/.TestFileLink.$$.$i";
932 last if ( !-e $targetFile && !-e $newFile );
934 return 0 if ( !open($fd, ">", $targetFile) );
936 my $ret = link($targetFile, $newFile);
944 my($bpc, $host) = @_;
945 my($s, $pingCmd, $ret);
948 # Return success if the ping cmd is undefined or empty.
950 if ( $bpc->{Conf}{PingCmd} eq "" ) {
951 print(STDERR "CheckHostAlive: return ok because \$Conf{PingCmd}"
952 . " is empty\n") if ( $bpc->{verbose} );
957 pingPath => $bpc->{Conf}{PingPath},
960 $pingCmd = $bpc->cmdVarSubstitute($bpc->{Conf}{PingCmd}, $args);
963 # Do a first ping in case the PC needs to wakeup
965 $s = $bpc->cmdSystemOrEval($pingCmd, undef, $args);
967 print(STDERR "CheckHostAlive: first ping failed ($?, $!)\n")
968 if ( $bpc->{verbose} );
973 # Do a second ping and get the round-trip time in msec
975 $s = $bpc->cmdSystemOrEval($pingCmd, undef, $args);
977 print(STDERR "CheckHostAlive: second ping failed ($?, $!)\n")
978 if ( $bpc->{verbose} );
981 if ( $s =~ /rtt\s*min\/avg\/max\/mdev\s*=\s*[\d.]+\/([\d.]+)\/[\d.]+\/[\d.]+\s*(ms|usec)/i ) {
983 $ret /= 1000 if ( lc($2) eq "usec" );
984 } elsif ( $s =~ /time=([\d.]+)\s*(ms|usec)/i ) {
986 $ret /= 1000 if ( lc($2) eq "usec" );
988 print(STDERR "CheckHostAlive: can't extract round-trip time"
989 . " (not fatal)\n") if ( $bpc->{verbose} );
992 print(STDERR "CheckHostAlive: returning $ret\n") if ( $bpc->{verbose} );
996 sub CheckFileSystemUsage
999 my($topDir) = $bpc->{TopDir};
1002 return 0 if ( $bpc->{Conf}{DfCmd} eq "" );
1004 dfPath => $bpc->{Conf}{DfPath},
1005 topDir => $bpc->{TopDir},
1007 $dfCmd = $bpc->cmdVarSubstitute($bpc->{Conf}{DfCmd}, $args);
1008 $s = $bpc->cmdSystemOrEval($dfCmd, undef, $args);
1009 return 0 if ( $? || $s !~ /(\d+)%/s );
1014 # Given an IP address, return the host name and user name via
1019 my($bpc, $host) = @_;
1020 my($netBiosHostName, $netBiosUserName);
1024 # Skip NetBios check if NmbLookupCmd is emtpy
1026 if ( $bpc->{Conf}{NmbLookupCmd} eq "" ) {
1027 print(STDERR "NetBiosInfoGet: return $host because \$Conf{NmbLookupCmd}"
1028 . " is empty\n") if ( $bpc->{verbose} );
1029 return ($host, undef);
1033 nmbLookupPath => $bpc->{Conf}{NmbLookupPath},
1036 $nmbCmd = $bpc->cmdVarSubstitute($bpc->{Conf}{NmbLookupCmd}, $args);
1037 foreach ( split(/[\n\r]+/, $bpc->cmdSystemOrEval($nmbCmd, undef, $args)) ) {
1038 next if ( !/^\s*([\w\s-]+?)\s*<(\w{2})\> - .*<ACTIVE>/i );
1039 $netBiosHostName ||= $1 if ( $2 eq "00" ); # host is first 00
1040 $netBiosUserName = $1 if ( $2 eq "03" ); # user is last 03
1042 if ( !defined($netBiosHostName) ) {
1043 print(STDERR "NetBiosInfoGet: failed: can't parse return string\n")
1044 if ( $bpc->{verbose} );
1047 $netBiosHostName = lc($netBiosHostName);
1048 $netBiosUserName = lc($netBiosUserName);
1049 print(STDERR "NetBiosInfoGet: success, returning host $netBiosHostName,"
1050 . " user $netBiosUserName\n") if ( $bpc->{verbose} );
1051 return ($netBiosHostName, $netBiosUserName);
1055 # Given a NetBios name lookup the IP address via NetBios.
1056 # In the case of a host returning multiple interfaces we
1057 # return the first IP address that matches the subnet mask.
1058 # If none match the subnet mask (or nmblookup doesn't print
1059 # the subnet mask) then just the first IP address is returned.
1061 sub NetBiosHostIPFind
1063 my($bpc, $host) = @_;
1064 my($netBiosHostName, $netBiosUserName);
1065 my($s, $nmbCmd, $subnet, $ipAddr, $firstIpAddr);
1068 # Skip NetBios lookup if NmbLookupFindHostCmd is emtpy
1070 if ( $bpc->{Conf}{NmbLookupFindHostCmd} eq "" ) {
1071 print(STDERR "NetBiosHostIPFind: return $host because"
1072 . " \$Conf{NmbLookupFindHostCmd} is empty\n")
1073 if ( $bpc->{verbose} );
1078 nmbLookupPath => $bpc->{Conf}{NmbLookupPath},
1081 $nmbCmd = $bpc->cmdVarSubstitute($bpc->{Conf}{NmbLookupFindHostCmd}, $args);
1082 foreach my $resp ( split(/[\n\r]+/, $bpc->cmdSystemOrEval($nmbCmd, undef,
1084 if ( $resp =~ /querying\s+\Q$host\E\s+on\s+(\d+\.\d+\.\d+\.\d+)/i ) {
1086 $subnet = $1 if ( $subnet =~ /^(.*?)(\.255)+$/ );
1087 } elsif ( $resp =~ /^\s*(\d+\.\d+\.\d+\.\d+)\s+\Q$host/ ) {
1089 $firstIpAddr = $ip if ( !defined($firstIpAddr) );
1090 $ipAddr = $ip if ( !defined($ipAddr) && $ip =~ /^\Q$subnet/ );
1093 $ipAddr = $firstIpAddr if ( !defined($ipAddr) );
1094 if ( defined($ipAddr) ) {
1095 print(STDERR "NetBiosHostIPFind: found IP address $ipAddr for"
1096 . " host $host\n") if ( $bpc->{verbose} );
1099 print(STDERR "NetBiosHostIPFind: couldn't find IP address for"
1100 . " host $host\n") if ( $bpc->{verbose} );
1105 sub fileNameEltMangle
1107 my($bpc, $name) = @_;
1109 return "" if ( $name eq "" );
1110 $name =~ s{([%/\n\r])}{sprintf("%%%02x", ord($1))}eg;
1115 # We store files with every name preceded by "f". This
1116 # avoids possible name conflicts with other information
1117 # we store in the same directories (eg: attribute info).
1118 # The process of turning a normal path into one with each
1119 # node prefixed with "f" is called mangling.
1123 my($bpc, $name) = @_;
1125 $name =~ s{/([^/]+)}{"/" . $bpc->fileNameEltMangle($1)}eg;
1126 $name =~ s{^([^/]+)}{$bpc->fileNameEltMangle($1)}eg;
1131 # This undoes FileNameMangle
1133 sub fileNameUnmangle
1135 my($bpc, $name) = @_;
1139 $name =~ s{%(..)}{chr(hex($1))}eg;
1144 # Escape shell meta-characters with backslashes.
1145 # This should be applied to each argument seperately, not an
1146 # entire shell command.
1150 my($bpc, $cmd) = @_;
1152 $cmd =~ s/([][;&()<>{}|^\n\r\t *\$\\'"`?])/\\$1/g;
1157 # For printing exec commands (which don't use a shell) so they look like
1158 # a valid shell command this function should be called with the exec
1159 # args. The shell command string is returned.
1161 sub execCmd2ShellCmd
1163 my($bpc, @args) = @_;
1166 foreach my $a ( @args ) {
1167 $str .= " " if ( $str ne "" );
1168 $str .= $bpc->shellEscape($a);
1174 # Do a URI-style escape to protect/encode special characters
1179 $s =~ s{([^\w.\/-])}{sprintf("%%%02X", ord($1));}eg;
1184 # Do a URI-style unescape to restore special characters
1189 $s =~ s{%(..)}{chr(hex($1))}eg;
1194 # Do variable substitution prior to execution of a command.
1196 sub cmdVarSubstitute
1198 my($bpc, $template, $vars) = @_;
1202 # Return without any substitution if the first entry starts with "&",
1203 # indicating this is perl code.
1205 if ( (ref($template) eq "ARRAY" ? $template->[0] : $template) =~ /^\&/ ) {
1208 if ( ref($template) ne "ARRAY" ) {
1210 # Split at white space, except if escaped by \
1212 $template = [split(/(?<!\\)\s+/, $template)];
1214 # Remove the \ that escaped white space.
1216 foreach ( @$template ) {
1221 # Merge variables into @tarClientCmd
1223 foreach my $arg ( @$template ) {
1225 # Replace scalar variables first
1227 $arg =~ s{\$(\w+)(\+?)}{
1228 exists($vars->{$1}) && ref($vars->{$1}) ne "ARRAY"
1229 ? ($2 eq "+" ? $bpc->shellEscape($vars->{$1}) : $vars->{$1})
1233 # Now replicate any array arguments; this just works for just one
1234 # array var in each argument.
1236 if ( $arg =~ m{(.*)\$(\w+)(\+?)(.*)} && ref($vars->{$2}) eq "ARRAY" ) {
1241 foreach my $v ( @{$vars->{$var}} ) {
1242 $v = $bpc->shellEscape($v) if ( $esc eq "+" );
1243 push(@cmd, "$pre$v$post");
1253 # Exec or eval a command. $cmd is either a string on an array ref.
1255 # @args are optional arguments for the eval() case; they are not used
1260 my($bpc, $cmd, @args) = @_;
1262 if ( (ref($cmd) eq "ARRAY" ? $cmd->[0] : $cmd) =~ /^\&/ ) {
1263 $cmd = join(" ", $cmd) if ( ref($cmd) eq "ARRAY" );
1264 print(STDERR "cmdExecOrEval: about to eval perl code $cmd\n")
1265 if ( $bpc->{verbose} );
1267 print(STDERR "Perl code fragment for exec shouldn't return!!\n");
1270 $cmd = [split(/\s+/, $cmd)] if ( ref($cmd) ne "ARRAY" );
1271 print(STDERR "cmdExecOrEval: about to exec ",
1272 $bpc->execCmd2ShellCmd(@$cmd), "\n")
1273 if ( $bpc->{verbose} );
1275 $cmd = [map { m/(.*)/ } @$cmd]; # untaint
1277 # force list-form of exec(), ie: no shell even for 1 arg
1279 exec { $cmd->[0] } @$cmd;
1280 print(STDERR "Exec failed for @$cmd\n");
1286 # System or eval a command. $cmd is either a string on an array ref.
1287 # $stdoutCB is a callback for output generated by the command. If it
1288 # is undef then output is returned. If it is a code ref then the function
1289 # is called with each piece of output as an argument. If it is a scalar
1290 # ref the output is appended to this variable.
1292 # @args are optional arguments for the eval() case; they are not used
1295 # Also, $? should be set when the CHILD pipe is closed.
1297 sub cmdSystemOrEvalLong
1299 my($bpc, $cmd, $stdoutCB, $ignoreStderr, $pidHandlerCB, @args) = @_;
1300 my($pid, $out, $allOut);
1304 if ( (ref($cmd) eq "ARRAY" ? $cmd->[0] : $cmd) =~ /^\&/ ) {
1305 $cmd = join(" ", $cmd) if ( ref($cmd) eq "ARRAY" );
1306 print(STDERR "cmdSystemOrEval: about to eval perl code $cmd\n")
1307 if ( $bpc->{verbose} );
1309 $$stdoutCB .= $out if ( ref($stdoutCB) eq 'SCALAR' );
1310 &$stdoutCB($out) if ( ref($stdoutCB) eq 'CODE' );
1311 print(STDERR "cmdSystemOrEval: finished: got output $out\n")
1312 if ( $bpc->{verbose} );
1313 return $out if ( !defined($stdoutCB) );
1316 $cmd = [split(/\s+/, $cmd)] if ( ref($cmd) ne "ARRAY" );
1317 print(STDERR "cmdSystemOrEval: about to system ",
1318 $bpc->execCmd2ShellCmd(@$cmd), "\n")
1319 if ( $bpc->{verbose} );
1320 if ( !defined($pid = open(CHILD, "-|")) ) {
1321 my $err = "Can't fork to run @$cmd\n";
1323 $$stdoutCB .= $err if ( ref($stdoutCB) eq 'SCALAR' );
1324 &$stdoutCB($err) if ( ref($stdoutCB) eq 'CODE' );
1325 return $err if ( !defined($stdoutCB) );
1334 if ( $ignoreStderr ) {
1335 open(STDERR, ">", "/dev/null");
1337 open(STDERR, ">&STDOUT");
1340 $cmd = [map { m/(.*)/ } @$cmd]; # untaint
1342 # force list-form of exec(), ie: no shell even for 1 arg
1344 exec { $cmd->[0] } @$cmd;
1345 print(STDERR "Exec of @$cmd failed\n");
1350 # Notify caller of child's pid
1352 &$pidHandlerCB($pid) if ( ref($pidHandlerCB) eq "CODE" );
1355 # The parent gathers the output from the child
1358 $$stdoutCB .= $_ if ( ref($stdoutCB) eq 'SCALAR' );
1359 &$stdoutCB($_) if ( ref($stdoutCB) eq 'CODE' );
1360 $out .= $_ if ( !defined($stdoutCB) );
1361 $allOut .= $_ if ( $bpc->{verbose} );
1366 print(STDERR "cmdSystemOrEval: finished: got output $allOut\n")
1367 if ( $bpc->{verbose} );
1372 # The shorter version that sets $ignoreStderr = 0, ie: merges stdout
1373 # and stderr together.
1377 my($bpc, $cmd, $stdoutCB, @args) = @_;
1379 return $bpc->cmdSystemOrEvalLong($cmd, $stdoutCB, 0, undef, @args);
1383 # Promotes $conf->{BackupFilesOnly}, $conf->{BackupFilesExclude}
1384 # to hashes and $conf->{$shareName} to an array.
1386 sub backupFileConfFix
1388 my($bpc, $conf, $shareName) = @_;
1390 $conf->{$shareName} = [ $conf->{$shareName} ]
1391 if ( ref($conf->{$shareName}) ne "ARRAY" );
1392 foreach my $param qw(BackupFilesOnly BackupFilesExclude) {
1393 next if ( !defined($conf->{$param}) );
1394 if ( ref($conf->{$param}) eq "HASH" ) {
1396 # A "*" entry means wildcard - it is the default for
1397 # all shares. Replicate the "*" entry for all shares,
1398 # but still allow override of specific entries.
1400 next if ( !defined($conf->{$param}{"*"}) );
1402 map({ $_ => $conf->{$param}{"*"} }
1403 @{$conf->{$shareName}}),
1407 $conf->{$param} = [ $conf->{$param} ]
1408 if ( ref($conf->{$param}) ne "ARRAY" );
1409 $conf->{$param} = { map { $_ => $conf->{$param} }
1410 @{$conf->{$shareName}} };
1416 # This is sort() compare function, used below.
1418 # New client LOG names are LOG.MMYYYY. Old style names are
1419 # LOG, LOG.0, LOG.1 etc. Sort them so new names are
1420 # first, and newest to oldest.
1424 my $na = $1 if ( $a =~ /LOG\.(\d+)(\.z)?$/ );
1425 my $nb = $1 if ( $b =~ /LOG\.(\d+)(\.z)?$/ );
1427 $na = -1 if ( !defined($na) );
1428 $nb = -1 if ( !defined($nb) );
1430 if ( length($na) >= 5 && length($nb) >= 5 ) {
1432 # Both new style: format is MMYYYY. Bigger dates are
1435 my $ma = $2 * 12 + $1 if ( $na =~ /(\d+)(\d{4})/ );
1436 my $mb = $2 * 12 + $1 if ( $nb =~ /(\d+)(\d{4})/ );
1438 } elsif ( length($na) >= 5 && length($nb) < 5 ) {
1440 } elsif ( length($na) < 5 && length($nb) >= 5 ) {
1444 # Both old style. Smaller numbers are more recent.
1451 # Returns list of paths to a clients's (or main) LOG files,
1452 # most recent first.
1454 sub sortedPCLogFiles
1456 my($bpc, $host) = @_;
1460 if ( $host ne "" ) {
1461 $dir = "$bpc->{TopDir}/pc/$host";
1463 $dir = "$bpc->{LogDir}";
1465 if ( opendir(DIR, $dir) ) {
1466 foreach my $file ( readdir(DIR) ) {
1467 next if ( !-f "$dir/$file" );
1468 next if ( $file ne "LOG" && $file !~ /^LOG\.\d/ );
1469 push(@files, "$dir/$file");
1473 return sort compareLOGName @files;
1477 # converts a glob-style pattern into a perl regular expression.
1481 my ( $bpc, $glob ) = @_;
1482 my ( $char, $subst );
1484 # $escapeChars escapes characters with no special glob meaning but
1485 # have meaning in regexps.
1486 my $escapeChars = [ '.', '/', ];
1488 # $charMap is where we implement the special meaning of glob
1489 # patterns and translate them to regexps.
1494 # multiple forward slashes are equivalent to one slash. We should
1495 # never have to use this.
1498 foreach $char (@$escapeChars) {
1499 $glob =~ s/\Q$char\E/\\$char/g;
1502 while ( ( $char, $subst ) = each(%$charMap) ) {
1503 $glob =~ s/(?<!\\)\Q$char\E/$subst/g;