--- /dev/null
+#!/bin/perl
+#============================================================= -*-perl-*-
+#
+# BackupPC_tarPCCopy: create a tar archive of the PC directory
+# for copying the entire PC data directory. The archive will
+# contain hardlinks to the pool directory, which should be copied
+# before BackupPC_tarPCCopy is run.
+#
+# DESCRIPTION
+#
+# Usage: BackupPC_tarPCCopy [options] files/directories...
+#
+# Flags:
+# -c don't cache inode data (reduces memory usage at the
+# expense of longer run time)
+#
+# AUTHOR
+# Craig Barratt <cbarratt@users.sourceforge.net>
+#
+# COPYRIGHT
+# Copyright (C) 2005 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+#========================================================================
+#
+# Version 2.1.0, released 20 Jun 2004.
+#
+# See http://backuppc.sourceforge.net.
+#
+#========================================================================
+
+use strict;
+no utf8;
+use lib "/usr/local/BackupPC/lib";
+use File::Find;
+use File::Path;
+use Getopt::Std;
+
+use BackupPC::Lib;
+use BackupPC::Attrib qw(:all);
+use BackupPC::FileZIO;
+use BackupPC::View;
+
+use constant S_IFMT => 0170000; # type of file
+
+die("BackupPC::Lib->new failed\n") if ( !(my $bpc = BackupPC::Lib->new) );
+my $TopDir = $bpc->TopDir();
+my $BinDir = $bpc->BinDir();
+my %Conf = $bpc->Conf();
+
+my %opts;
+
+if ( !getopts("c", \%opts) || @ARGV < 1 ) {
+ print STDERR <<EOF;
+usage: $0 [options] files/directories...
+ Options:
+ -c don't cache inode data (reduces memory usage at the
+ expense of longer run time)
+EOF
+ exit(1);
+}
+
+#
+# This constant and the line of code below that uses it are borrowed
+# from Archive::Tar. Thanks to Calle Dybedahl and Stephen Zander.
+# See www.cpan.org.
+#
+# Archive::Tar is Copyright 1997 Calle Dybedahl. All rights reserved.
+# Copyright 1998 Stephen Zander. All rights reserved.
+#
+my $tar_pack_header
+ = 'a100 a8 a8 a8 a12 a12 A8 a1 a100 a6 a2 a32 a32 a8 a8 a155 x12';
+my $tar_header_length = 512;
+
+my $BufSize = 1048576; # 1MB or 2^20
+my $WriteBuf = "";
+my $WriteBufSz = ($opts{b} || 20) * $tar_header_length;
+
+my(%UidCache, %GidCache);
+
+my($ClientName, $ClientBackups, $ClientBkupNum, $ClientDirAttr, $ClientDir);
+
+my $FileCnt = 0;
+my $HLinkCnt = 0;
+my $ByteCnt = 0;
+my $DirCnt = 0;
+my $ErrorCnt = 0;
+my $ClientBkupCompress = 1;
+my $ClientBkupMangle = 1;
+
+my %Inode2Path;
+
+#
+# Write out all the requested files/directories
+#
+binmode(STDOUT);
+my $fh = *STDOUT;
+
+my $argCnt = 1;
+my $argMax = @ARGV;
+
+while ( @ARGV ) {
+ my $path = shift(@ARGV);
+
+ if ( $path !~ m{^\Q$TopDir/\E} ) {
+ print STDERR "Argument $path must be an absolute path starting with $TopDir\n";
+ exit(1);
+ }
+ if ( !-d $path ) {
+ print STDERR "Argument $path does not exist\n";
+ exit(1);
+ }
+
+ find({wanted => sub { archiveFile($fh) } }, $path);
+
+ #
+ # To avoid using too much memory for the inode cache,
+ # remove it after each top-level directory is done.
+ #
+ %Inode2Path = ();
+
+ #
+ # Print some stats
+ #
+ print STDERR "Done $path ($argCnt of $argMax): $DirCnt dirs,"
+ . " $FileCnt files, $HLinkCnt hardlinks\n";
+
+ $FileCnt = 0;
+ $HLinkCnt = 0;
+ $ByteCnt = 0;
+ $DirCnt = 0;
+
+ $argCnt++;
+}
+
+#
+# Finish with two null 512 byte headers, and then round out a full
+# block.
+#
+my $data = "\0" x ($tar_header_length * 2);
+TarWrite($fh, \$data);
+TarWrite($fh, undef);
+
+if ( $ErrorCnt ) {
+ #
+ # Got errors so exit with a non-zero status
+ #
+ print STDERR "Got $ErrorCnt warnings/errors\n";
+ exit(1);
+}
+exit(0);
+
+###########################################################################
+# Subroutines
+###########################################################################
+
+sub archiveFile
+{
+ my($fh) = @_;
+ my($hdr);
+
+ my @s = stat($_);
+
+ #
+ # We just handle directories and files; no symlinks or
+ # char/block special files.
+ #
+ $hdr->{type} = -d _ ? BPC_FTYPE_DIR
+ : -f _ ? BPC_FTYPE_FILE
+ : -1;
+ $hdr->{fullPath} = $File::Find::name;
+ $hdr->{inode} = $s[1];
+ $hdr->{nlink} = $s[3];
+ $hdr->{size} = $s[7];
+ $hdr->{devmajor} = $s[6] >> 8;
+ $hdr->{devminor} = $s[6] & 0xff;
+ $hdr->{uid} = $s[4];
+ $hdr->{gid} = $s[5];
+ $hdr->{mode} = $s[2];
+ $hdr->{mtime} = $s[9];
+ $hdr->{compress} = 1;
+
+ if ( $hdr->{fullPath} !~ m{\Q$TopDir\E/pc/(.*)} ) {
+ print STDERR "Can't extract TopDir ($TopDir) from"
+ . " $hdr->{fullPath}\n";
+ $ErrorCnt++;
+ return;
+ }
+ $hdr->{relPath} = $1;
+ if ( $hdr->{relPath} =~ m{(.*)/(.*)} ) {
+ $hdr->{name} = $2;
+ } else {
+ $hdr->{name} = $hdr->{relPath};
+ }
+
+ if ( $hdr->{relPath} =~ m{(.*?)/} ) {
+ my $clientName = $1;
+ if ( $ClientName ne $clientName ) {
+ $ClientName = $clientName;
+ $ClientBackups = [ $bpc->BackupInfoRead($ClientName) ];
+ #print STDERR "Setting Client to $ClientName\n";
+ }
+ if ( $hdr->{relPath} =~ m{(.*?)/(\d+)/}
+ || $hdr->{relPath} =~ m{(.*?)/(\d+)$} ) {
+ my $backupNum = $2;
+ if ( $ClientBkupNum != $backupNum ) {
+ my $i;
+ $ClientBkupNum = $backupNum;
+ # print STDERR "Setting ClientBkupNum to $ClientBkupNum\n";
+ for ( $i = 0 ; $i < @$ClientBackups ; $i++ ) {
+ if ( $ClientBackups->[$i]{num} == $ClientBkupNum ) {
+ $ClientBkupCompress = $ClientBackups->[$i]{compress};
+ $ClientBkupMangle = $ClientBackups->[$i]{mangle};
+ # print STDERR "Setting $ClientBkupNum compress to $ClientBkupCompress, mangle to $ClientBkupMangle\n";
+ last;
+ }
+ }
+ }
+ $hdr->{compress} = $ClientBkupCompress;
+ if ( $hdr->{type} == BPC_FTYPE_FILE && $hdr->{nlink} > 1
+ && $hdr->{name} =~ /^f/ ) {
+ (my $dir = $hdr->{fullPath}) =~ s{(.*)/.*}{$1};
+ if ( $ClientDir ne $dir ) {
+ $ClientDir = $dir;
+ $ClientDirAttr = BackupPC::Attrib->new(
+ { compress => $ClientBkupCompress }
+ );
+ if ( -f $ClientDirAttr->fileName($dir)
+ && !$ClientDirAttr->read($dir) ) {
+ print STDERR "Can't read attrib file in $dir\n";
+ $ErrorCnt++;
+ }
+ }
+ my $name = $hdr->{name};
+ $name = $bpc->fileNameUnmangle($name) if ( $ClientBkupMangle );
+ my $attr = $ClientDirAttr->get($name);
+ $hdr->{realSize} = $attr->{size} if ( defined($attr) );
+ #print STDERR "$hdr->{fullPath} has real size $hdr->{realSize}\n";
+ }
+ }
+ } else {
+ $hdr->{compress} = 0;
+ $hdr->{realSize} = $hdr->{size};
+ }
+
+ #print STDERR "$File::Find::name\n";
+
+ TarWriteFile($hdr, $fh);
+}
+
+sub UidLookup
+{
+ my($uid) = @_;
+
+ $UidCache{$uid} = (getpwuid($uid))[0] if ( !exists($UidCache{$uid}) );
+ return $UidCache{$uid};
+}
+
+sub GidLookup
+{
+ my($gid) = @_;
+
+ $GidCache{$gid} = (getgrgid($gid))[0] if ( !exists($GidCache{$gid}) );
+ return $GidCache{$gid};
+}
+
+sub TarWrite
+{
+ my($fh, $dataRef) = @_;
+
+ if ( !defined($dataRef) ) {
+ #
+ # do flush by padding to a full $WriteBufSz
+ #
+ my $data = "\0" x ($WriteBufSz - length($WriteBuf));
+ $dataRef = \$data;
+ }
+ if ( length($WriteBuf) + length($$dataRef) < $WriteBufSz ) {
+ #
+ # just buffer and return
+ #
+ $WriteBuf .= $$dataRef;
+ return;
+ }
+ my $done = $WriteBufSz - length($WriteBuf);
+ if ( (my $n = syswrite($fh, $WriteBuf . substr($$dataRef, 0, $done)))
+ != $WriteBufSz ) {
+ print(STDERR "Unable to write to output file ($!) ($n vs $WriteBufSz)\n");
+ exit(1);
+ }
+ while ( $done + $WriteBufSz <= length($$dataRef) ) {
+ if ( (my $n = syswrite($fh, substr($$dataRef, $done, $WriteBufSz)))
+ != $WriteBufSz ) {
+ print(STDERR "Unable to write to output file ($!) ($n v $WriteBufSz)\n");
+ exit(1);
+ }
+ $done += $WriteBufSz;
+ }
+ $WriteBuf = substr($$dataRef, $done);
+}
+
+sub TarWritePad
+{
+ my($fh, $size) = @_;
+
+ if ( $size % $tar_header_length ) {
+ my $data = "\0" x ($tar_header_length - ($size % $tar_header_length));
+ TarWrite($fh, \$data);
+ }
+}
+
+sub TarWriteHeader
+{
+ my($fh, $hdr) = @_;
+
+ $hdr->{uname} = UidLookup($hdr->{uid}) if ( !defined($hdr->{uname}) );
+ $hdr->{gname} = GidLookup($hdr->{gid}) if ( !defined($hdr->{gname}) );
+ my $devmajor = defined($hdr->{devmajor}) ? sprintf("%07o", $hdr->{devmajor})
+ : "";
+ my $devminor = defined($hdr->{devminor}) ? sprintf("%07o", $hdr->{devminor})
+ : "";
+ my $sizeStr;
+ if ( $hdr->{size} >= 2 * 65536 * 65536 ) {
+ #
+ # GNU extension for files >= 8GB: send size in big-endian binary
+ #
+ $sizeStr = pack("c4 N N", 0x80, 0, 0, 0,
+ $hdr->{size} / (65536 * 65536),
+ $hdr->{size} % (65536 * 65536));
+ } elsif ( $hdr->{size} >= 1 * 65536 * 65536 ) {
+ #
+ # sprintf octal only handles up to 2^32 - 1
+ #
+ $sizeStr = sprintf("%03o", $hdr->{size} / (1 << 24))
+ . sprintf("%08o", $hdr->{size} % (1 << 24));
+ } else {
+ $sizeStr = sprintf("%011o", $hdr->{size});
+ }
+ my $data = pack($tar_pack_header,
+ substr($hdr->{name}, 0, 99),
+ sprintf("%07o", $hdr->{mode}),
+ sprintf("%07o", $hdr->{uid}),
+ sprintf("%07o", $hdr->{gid}),
+ $sizeStr,
+ sprintf("%011o", $hdr->{mtime}),
+ "", #checksum field - space padded by pack("A8")
+ $hdr->{type},
+ substr($hdr->{linkname}, 0, 99),
+ $hdr->{magic} || 'ustar ',
+ $hdr->{version} || ' ',
+ $hdr->{uname},
+ $hdr->{gname},
+ $devmajor,
+ $devminor,
+ "" # prefix is empty
+ );
+ substr($data, 148, 7) = sprintf("%06o\0", unpack("%16C*",$data));
+ TarWrite($fh, \$data);
+}
+
+sub TarWriteFileInfo
+{
+ my($fh, $hdr) = @_;
+
+ #
+ # Handle long link names (symbolic links)
+ #
+ if ( length($hdr->{linkname}) > 99 ) {
+ my %h;
+ my $data = $hdr->{linkname} . "\0";
+ $h{name} = "././\@LongLink";
+ $h{type} = "K";
+ $h{size} = length($data);
+ TarWriteHeader($fh, \%h);
+ TarWrite($fh, \$data);
+ TarWritePad($fh, length($data));
+ }
+ #
+ # Handle long file names
+ #
+ if ( length($hdr->{name}) > 99 ) {
+ my %h;
+ my $data = $hdr->{name} . "\0";
+ $h{name} = "././\@LongLink";
+ $h{type} = "L";
+ $h{size} = length($data);
+ TarWriteHeader($fh, \%h);
+ TarWrite($fh, \$data);
+ TarWritePad($fh, length($data));
+ }
+ TarWriteHeader($fh, $hdr);
+}
+
+my $Attr;
+my $AttrDir;
+
+sub TarWriteFile
+{
+ my($hdr, $fh) = @_;
+
+ my $tarPath = $hdr->{relPath};
+
+ $tarPath =~ s{//+}{/}g;
+ $tarPath = "./" . $tarPath if ( $tarPath !~ /^\.\// );
+ $tarPath =~ s{//+}{/}g;
+ $hdr->{name} = $tarPath;
+
+ if ( $hdr->{type} == BPC_FTYPE_DIR ) {
+ #
+ # Directory: just write the header
+ #
+ $hdr->{name} .= "/" if ( $hdr->{name} !~ m{/$} );
+ TarWriteFileInfo($fh, $hdr);
+ $DirCnt++;
+ } elsif ( $hdr->{type} == BPC_FTYPE_FILE ) {
+ #
+ # Regular file: write the header and file
+ #
+ my($data, $dataMD5, $size, $linkName);
+
+ if ( $hdr->{type} == BPC_FTYPE_FILE && $hdr->{nlink} > 1 ) {
+ if ( defined($Inode2Path{$hdr->{inode}}) ) {
+ $linkName = $Inode2Path{$hdr->{inode}};
+ #print STDERR "Got cache hit for $linkName\n";
+ } else {
+ my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0,
+ $hdr->{compress});
+ if ( !defined($f) ) {
+ print(STDERR "Unable to open file $hdr->{fullPath}\n");
+ $ErrorCnt++;
+ return;
+ }
+ #
+ # Try to find the hardlink it points to by computing
+ # the pool file digest.
+ #
+ $f->read(\$dataMD5, $BufSize);
+ if ( !defined($hdr->{realSize}) ) {
+ #
+ # Need to get the real size
+ #
+ $size = length($dataMD5);
+ while ( $f->read(\$data, $BufSize) > 0 ) {
+ $size += length($data);
+ }
+ $hdr->{realSize} = $size;
+ }
+ $f->close();
+ my $md5 = Digest::MD5->new;
+ if ( $hdr->{realSize} < 1048576
+ && length($dataMD5) != $hdr->{realSize} ) {
+ printf(STDERR "File $hdr->{fullPath} has bad size"
+ . " (expect $hdr->{realSize}, got %d)\n",
+ length($dataMD5));
+ } else {
+ my $digest = $bpc->Buffer2MD5($md5, $hdr->{realSize},
+ \$dataMD5);
+ my $path = $bpc->MD52Path($digest, $hdr->{compress});
+ my $i = -1;
+
+ # print(STDERR "Looking up $hdr->{fullPath} at $path\n");
+ while ( 1 ) {
+ my $testPath = $path;
+ $testPath .= "_$i" if ( $i >= 0 );
+ last if ( !-f $testPath );
+ my $inode = (stat(_))[1];
+ if ( $inode == $hdr->{inode} ) {
+ #
+ # Found it! Just emit a tar hardlink
+ #
+ $testPath =~ s{\Q$TopDir\E}{..};
+ $linkName = $testPath;
+ last;
+ }
+ $i++;
+ }
+ }
+ }
+ if ( defined($linkName) ) {
+ $hdr->{type} = BPC_FTYPE_HARDLINK;
+ $hdr->{linkname} = $linkName;
+ TarWriteFileInfo($fh, $hdr);
+ $HLinkCnt++;
+ #print STDERR "$hdr->{relPath} matches $testPath\n";
+ if ( !$opts{c} && $hdr->{nlink} > 2 ) {
+ #
+ # add it to the cache if there are more
+ # than 2 links (pool + current file),
+ # since there are more to go
+ #
+ $Inode2Path{$hdr->{inode}} = $linkName;
+ }
+ return;
+ }
+ $size = 0;
+ print STDERR "Can't find $hdr->{relPath} in pool, will copy file\n";
+ $ErrorCnt++;
+ }
+
+ my $f = BackupPC::FileZIO->open($hdr->{fullPath}, 0, 0);
+ if ( !defined($f) ) {
+ print(STDERR "Unable to open file $hdr->{fullPath}\n");
+ $ErrorCnt++;
+ return;
+ }
+ TarWriteFileInfo($fh, $hdr);
+ while ( $f->read(\$data, $BufSize) > 0 ) {
+ if ( $size + length($data) > $hdr->{size} ) {
+ print(STDERR "Error: truncating $hdr->{fullPath} to"
+ . " $hdr->{size} bytes\n");
+ $data = substr($data, 0, $hdr->{size} - $size);
+ $ErrorCnt++;
+ }
+ TarWrite($fh, \$data);
+ $size += length($data);
+ }
+ $f->close;
+ if ( $size != $hdr->{size} ) {
+ print(STDERR "Error: padding $hdr->{fullPath} to $hdr->{size}"
+ . " bytes from $size bytes\n");
+ $ErrorCnt++;
+ while ( $size < $hdr->{size} ) {
+ my $len = $hdr->{size} - $size;
+ $len = $BufSize if ( $len > $BufSize );
+ $data = "\0" x $len;
+ TarWrite($fh, \$data);
+ $size += $len;
+ }
+ }
+ TarWritePad($fh, $size);
+ $FileCnt++;
+ $ByteCnt += $size;
+ } else {
+ print(STDERR "Got unknown type $hdr->{type} for $hdr->{name}\n");
+ $ErrorCnt++;
+ }
+}
projects / BackupPC.git / blobdiff