dbackup 34.7 KB
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#!/usr/bin/perl -w
# Copyright (c) 2010-2012, AllWorldIT
# 
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
#
# Author: Nigel Kukard <nkukard@lbsd.net>


# TODO:
# - USE incremental backups!!!! fucking awesome
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#
# - Read in defaultSystemExcl extras from /proc/mounts
# - proc, nfs, nfs4, fusectl fuse.glusterfs, sysfs, tmpfs, devtmpfs, devpts
#
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use strict;
use Compress::Zlib;
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use Config::IniFiles;
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use Cwd;
use Fcntl qw (:mode);
use File::Find;
use File::Path qw( rmtree mkpath );
use File::Spec;
use Getopt::Long;
use POSIX qw (strftime);
use Data::Dumper;
use MIME::Base64;



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my $VERSION = "0.0.8";
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# System dirs we don't care about
my @defaultSystemExcl = ("/dev","/run","/proc","/sys","/tmp","/var/tmp");
# These should be backed up separately
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my @defaultDataExcl = (
		"/var/lib/mysql","/var/lib/pgsql",
		"/var/amavis/tmp/",
		"/var/spool/mailman/retry"
);
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# Main config
my %config;

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# Backup constants
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use constant {
	LOG_DEBUG => 1,
	LOG_INFO => 2,
	LOG_NOTICE => 3,
	LOG_WARNING => 4,
	LOG_ERROR => 5
};

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use constant {
	ST_FILE_CHANGED 	=> 1,
	ST_DIR_NEW	=> 2,
	ST_DIR_SYS	=> 4,
	ST_DIR_CHANGED	=> 8,
	ST_FILE_ATTR_CHANGED	=> 16,
	ST_FILE_NEW	=> 32,
};



print(STDERR "DBackup v$VERSION, Copyright (c) 2010-2012, AllWorldIT\n\n");


# Grab options
my %optctl = ();
GetOptions(\%optctl,
	"help",

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	"config=s",
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	"log-level=i",
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	"backup",
	"compress:s",
	"exclude-system",
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	"system-base=s@",
	"system-dir=s@",
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	"exclude-data",
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	"data-dir=s@",
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	"exclude-file=s@",
	"exclude-path=s@",
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	"restore",
	"tar-keep-newer",
	"tar-keep-old-files",
);

# Check for help
if (defined($optctl{'help'})) {
	displayHelp();
	exit 0;
}

# Check for invalid combination
if (defined($optctl{'backup'}) && defined($optctl{'restore'})) {
	print(STDERR "ERROR: Cannot backup AND restore at the same time\n\n");
	displayHelp();
	exit 1;
}

# Make sure we only have 2 additional args
if (@ARGV > 2 || @ARGV < 2) {
		print(STDERR "ERROR: Invalid number of arguments\n\n");
		displayHelp();
		exit 1;
}

# Check both dirs exist...
if (! -d $ARGV[0]) {
	print(STDERR "ERROR: Source directory '".$ARGV[0]."' does not exist!\n\n");
	exit 1;
}
if (! -d $ARGV[1]) {
	print(STDERR "ERROR: Destination directory '".$ARGV[1]."' does not exist!\n\n");
	exit 1;
}

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# Check config file exists
if (defined($optctl{'config'})) {
	if (! -f $optctl{'config'}) {
		print(STDERR "ERROR: Configuration file '".$optctl{'config'}."' NOT found!\n");
		exit 1;
	}

	# Use config file, ignore case
	tie my %inifile, 'Config::IniFiles', (
			-file => $optctl{'config'},
			-nocase => 1
	) or die "Failed to open config file '".$optctl{'config'}."': ".join("\n",@Config::IniFiles::errors);

	# Check if we actually have something...
	if (defined($inifile{'backup'})) {
		# Loop with config items
		foreach my $item (keys %{$inifile{'backup'}}) {
			$config{$item} = $inifile{'backup'}{$item};
		}
	}
}

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# Check logging options
if (!defined($config{'log-level'})) {
	if (!defined($optctl{'log-level'})) {
		$config{'log-level'} = LOG_NOTICE;
	} else {
		$config{'log-level'} = $optctl{'log-level'};
	}
}

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# Setup config defaults...
if (!defined($config{'compress'})) {
	# Choose default compression method
	if (-x "/bin/xz" || -x "/usr/bin/xz") {
		$config{'compress'} = "xz";
	} else {
		$config{'compress'} = "bzip2";
	}
}

if (!defined($config{'exclude-system'})) {
	$config{'exclude-system'} = 0;
}

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if (!defined($config{'system-base'})) {
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	# Quick hack to see if we have a cmdline option
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	if (!defined($optctl{'system-base'})) {
		$config{'system-base'} = ["/"];
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	} else {
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		$config{'system-base'} = [];
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	}
} else {
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	$config{'system-base'} = toArray($config{'system-base'});
}

if (!defined($config{'system-dir'})) {
	$config{'system-dir'} = [];
} else {
	$config{'system-dir'} = toArray($config{'system-dir'});
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}

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if (!defined($config{'data-dir'})) {
	$config{'data-dir'} = [];
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} else {
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	$config{'data-dir'} = toArray($config{'data-dir'});
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}

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if (!defined($config{'exclude-file'})) {
	$config{'exclude-file'} = [];
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} else {
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	$config{'exclude-file'} = toArray($config{'exclude-file'});
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}

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if (!defined($config{'exclude-path'})) {
	$config{'exclude-path'} = [];
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} else {
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	$config{'exclude-path'} = toArray($config{'exclude-path'});
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}


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# Check compression
if (defined($optctl{'compress'})) {
	# Why use --compress with --restore?
	if (defined($optctl{'restore'})) {
		print(STDERR "WARNING: The use of --compress with --restore does not make sense\n");
	}

	# Make sure its valid
	if (
				$optctl{'compress'} ne "xz" &&
				$optctl{'compress'} ne "bzip2" &&
				$optctl{'compress'} ne "gzip" &&
				$optctl{'compress'} ne "none"
	) {	
		print(STDERR "ERROR: Compression is invalid, valid values are: xz bzip2 gzip none\n\n");
		displayHelp();
		exit 1;
	}
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	$config{'compress'} = $optctl{'compress'};
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}

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# Process our exclusion lists...
if (defined($optctl{'exclude-system'})) {
	$config{'exclude-system'} = 1;
}
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if (defined($optctl{'system-base'})) {
	push(@{$config{'system-base'}},@{$optctl{'system-base'}});
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}
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if (defined($optctl{'system-dir'})) {
	push(@{$config{'system-dir'}},@{$optctl{'system-dir'}});
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}
# Do similar for data dirs
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if (defined($optctl{'data-dir'})) {
	push(@{$config{'data-dir'}},@{$optctl{'data-dir'}});
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}
# And file filter
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if (defined($optctl{'exclude-file'})) {
	push(@{$config{'exclude-file'}},@{$optctl{'exclude-file'}});
}
# Finally file filter
if (defined($optctl{'exclude-path'})) {
	push(@{$config{'exclude-path'}},@{$optctl{'exclude-path'}});
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}

# Sanitize the source and dest
my $sourceDir = File::Spec->rel2abs($ARGV[0]);
my $destDir = File::Spec->rel2abs($ARGV[1]);


# Backup function
sub backup
{
	our ($source,$dest) = @_;


	# State infor for current dir
	our %doBackup;
	our %srcFileList;
	our %srcDirList;
	# Original .state file read in during backup
	our %origFileList;
	our %origDirList;
	our %origPathAttribs;
	# New attributes
	our %newPathAttribs;


	# Preprocess dir
	sub backup_preprocess {
		my @list = @_;

		# Strip first part of the path
		(my $path = $File::Find::dir) =~ s#^$source/?##;

		# Check if this dir should be backed up or not....
		if ( -f "$source/$path/.nodbackup" ) {
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			printLog(LOG_INFO,"S: Path '[$source]/($path)' EXCLUDED from backup with .nodbackup\n");
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			return ();
		}
		# Exclude trash folders
		if ( "$source/$path" =~ /(\.Trash-[0-9]{4})$/) {
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			printLog(LOG_INFO,"S: Path '[$source]/($path)' EXCLUDED from backup, Linux trash folder\n");
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			return ();
		}

		# Make sure even if we processing empty dirs that we actually record it
		if (!defined($srcFileList{$path})) {
			# Just set to empty hash ref
			$srcFileList{$path} = {};
		}

		# Exclude system directories
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		if ($config{'exclude-system'}) {
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			# Loop through system dirs
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			foreach my $sysdir (@{$config{'system-base'}}) {
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				# Loop with system paths
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				foreach my $excl (@defaultSystemExcl,@{$config{'system-dir'}}) {
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					# Sanitize path
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					my $testPath = File::Spec->rel2abs("$sysdir/$excl");
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					# Check...
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					if ("/$path" eq $testPath) {
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						printLog(LOG_INFO,"S: Path '[$source]/($path)' is a system directory, ignoring files\n");
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						$doBackup{$path} |= ST_DIR_SYS;
						return ();
					}
				}
				# Check if we excluding data dirs
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				if (defined($config{'exclude-data'})) {
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					# Loop with data dirs
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					foreach my $excl (@defaultDataExcl,@{$config{'data-dir'}}) {
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						# Sanitize path
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						my $testPath = File::Spec->rel2abs("$sysdir/$excl");
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						# Check...
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						if ("/$path" eq $testPath) {
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							printLog(LOG_INFO,"S: Path '[$source]/($path)' is a data directory, ignoring files\n");
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							$doBackup{$path} |= ST_DIR_SYS;
							return ();
						}
					}
				}
			}
		}
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		# Exclude paths
		foreach my $item (@{$config{'exclude-path'}}) {
			# Check...
			if ("/$path" =~ $item) {
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				printLog(LOG_INFO,"S: Path '[$source]/($path)' is an excluded path, ignoring files\n");
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				$doBackup{$path} |= ST_DIR_SYS;
				return ();
			}
		}
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		# Check if this dir exists on the backup, if not we need to back it up obviously...
		if ( ! -d "$dest/$path") {
			$doBackup{$path} |= ST_DIR_NEW;
		# This can probably only be because a backup was continued
		} elsif ( ! -f "$dest/$path/.dbackup-state" ) {
			# First backup will never have the main dir .dbackup-state file existing
			if ($path ne "") {
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				printLog(LOG_WARNING,"State file '$dest/$path/.dbackup-state' does not exist\n");
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			}
			$doBackup{$path} |= ST_DIR_NEW;
		}

		# Cannot read in for new dirs can we...
		if (($doBackup{$path} & ST_DIR_NEW) != ST_DIR_NEW) {
			# Load state file
			loadStateFile("$dest/$path/.dbackup-state",$path,\%origFileList,\%origDirList,\%origPathAttribs);

			# Check we have at least the version attribute
			if (!defined($origPathAttribs{$path}) || !defined($origPathAttribs{$path}->{'dbackup.version'})) {
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				printLog(LOG_ERROR,"No dbackup version information found in '$source/$path/.dbackup-state', IGNORING\n");
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				delete($origDirList{$path});
				delete($origFileList{$path});
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			}
		}

		# Apply filter...
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		if ((@{$config{'exclude-file'}}) > 0) {
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			my @newList;
			foreach my $item (@list) {
				my $match = 0;
				# Apply only to files
				if ( -f "$source/$path/$item") {
					# Loop with exclude filters
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					foreach my $filter (@{$config{'exclude-file'}}) {
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						# Check for match
						if ($item =~ $filter) {
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							printLog(LOG_INFO,"S: Path '[$source]/($path)/$item' matches file exclude filter, ignoring\n");
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							# XXX: NK - If this ws backed up before and now not, dir has changed?
							$match = 1;
							last;
						}
					}
				}
				# If not matched, add to new list
				if (!$match) {
					push(@newList,$item);
				}
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			}
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			# Replace the list now
			@list = @newList;
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		}

		return @list;
	}

	# Process files
	sub backup_process {
		my $name = $File::Find::name;
		# Strip first part of the path
		(my $path = $File::Find::dir) =~ s#^$source/?##;

		# Store current filename
		my $item = $_;

		# We use lstat so we don't follow symlinks that don't exist
		my @stat = lstat($name);
		# Split it up
		my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,
				$ctime,$blksize,$blocks) = @stat;

		# Process directory
		if (S_ISDIR($mode)) {
			# Skip over main dir
			if ($item eq ".") {
				return;
			}

			# Make sure sub dirs have a santized name
			my $ppath = ($path ne "") ? "$path/$item" : $item;

			# Set default flags to nothing...
			$doBackup{$ppath} = 0;

			# Ok, lets see whats going on with the dir
			if (!defined($origDirList{$path}->{$item})) {
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				printLog(LOG_DEBUG,"S: Directory '[$source]/($path)/$item' is new\n");
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				$doBackup{$path} |= ST_DIR_CHANGED;

			# Check if mtime matches
			} elsif (
					!defined($origDirList{$path}->{$item}->{'mtime'}) ||
					$origDirList{$path}->{$item}->{'mtime'} ne $mtime
			) {
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				printLog(LOG_DEBUG,"S: Directory '[$source]/($path)/$item' was modified\n"); 
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				$doBackup{$path} |= ST_DIR_CHANGED;
			# Check if uid matches
			} elsif (
					!defined($origDirList{$path}->{$item}->{'uid'}) ||
					$origDirList{$path}->{$item}->{'uid'} ne $uid
			) {
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				printLog(LOG_DEBUG,"S: Directory '[$source]/($path)/$item' UID was changed\n"); 
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				$doBackup{$path} |= ST_DIR_CHANGED;
			# Check if gid matches
			} elsif (
					!defined($origDirList{$path}->{$item}->{'gid'}) ||
					$origDirList{$path}->{$item}->{'gid'} ne $gid
			) {
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				printLog(LOG_DEBUG,"S: Directory '[$source]/($path)/$item' GID was changed\n"); 
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				$doBackup{$path} |= ST_DIR_CHANGED;
			# Check if mode matches
			} elsif (
					!defined($origDirList{$path}->{$item}->{'mode'}) ||
					$origDirList{$path}->{$item}->{'mode'} ne $mode
			) {
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				printLog(LOG_DEBUG,"S: Directory '[$source]/($path)/$item' MODE was changed\n"); 
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				$doBackup{$path} |= ST_DIR_CHANGED;
			}

			# Record details...	
			$srcDirList{$path}->{$item}->{'size'} = $size;
			$srcDirList{$path}->{$item}->{'ctime'} = $ctime;
			$srcDirList{$path}->{$item}->{'atime'} = $atime;
			$srcDirList{$path}->{$item}->{'mtime'} = $mtime;
			$srcDirList{$path}->{$item}->{'uid'} = $uid;
			$srcDirList{$path}->{$item}->{'gid'} = $gid;
			$srcDirList{$path}->{$item}->{'mode'} = $mode;

			return;
		}

		# Initialize file state
		my $state = 0;

		# Check if file does not exists on backup
		if (!defined($origFileList{$path}->{$item})) {
			if (($doBackup{$path} & ST_DIR_NEW) != ST_DIR_NEW) {
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				printLog(LOG_DEBUG,"S: File '[$source]/($path)/$item' is new\n");
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			}
			$state |= ST_FILE_NEW;

		# Check if size matches
		} elsif (
				!defined($origFileList{$path}->{$item}->{'size'}) ||
				$origFileList{$path}->{$item}->{'size'} ne $size
		) {
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			printLog(LOG_DEBUG,"S: File '[$source]/($path)/$item' has different size\n"); 
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			$state |= ST_FILE_CHANGED;

		#
		# NK: Does not like chmod changes to files???
		#
		# Check if ctime matches
#		} elsif (
#				!defined($origFileList{$path}->{$item}->{'ctime'}) ||
#				$origFileList{$path}->{$item}->{'ctime'} ne $ctime
#		) {
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#			printLog(LOG_DEBUG,"S: File '[$source]/($path)/$item' was recreated\n"); 
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#			$state |= ST_FILE_CHANGED;

		# Check if mtime matches
		} elsif (
				!defined($origFileList{$path}->{$item}->{'mtime'}) ||
				$origFileList{$path}->{$item}->{'mtime'} ne $mtime
		) {
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			printLog(LOG_DEBUG,"S: File '[$source]/($path)/$item' was modified\n"); 
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			$state |= ST_FILE_CHANGED;

		# Check if uid matches
		} elsif (
				!defined($origFileList{$path}->{$item}->{'uid'}) ||
				$origFileList{$path}->{$item}->{'uid'} ne $uid
		) {
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			printLog(LOG_DEBUG,"S: File '[$source]/($path)/$item' UID was changed\n"); 
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			$state |= ST_FILE_ATTR_CHANGED

		# Check if gid matches
		} elsif (
				!defined($origFileList{$path}->{$item}->{'gid'}) ||
				$origFileList{$path}->{$item}->{'gid'} ne $gid
		) {
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			printLog(LOG_DEBUG,"S: File '[$source]/($path)/$item' GID was changed\n"); 
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			$state |= ST_FILE_ATTR_CHANGED;

		# Check if mode matches
		} elsif (
				!defined($origFileList{$path}->{$item}->{'mode'}) ||
				$origFileList{$path}->{$item}->{'mode'} ne $mode
		) {
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			printLog(LOG_DEBUG,"S: File '[$source]/($path)/$item' MODE was changed\n"); 
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			$state |= ST_FILE_ATTR_CHANGED;
		}

		# Update state of path, this is used below, the $state is used to track WHAT changed
		if ($state) {
			$doBackup{$path} |= ST_FILE_CHANGED;
		}

		# Record details...	
		$srcFileList{$path}->{$item}->{'size'} = $size;
		$srcFileList{$path}->{$item}->{'ctime'} = $ctime;
		$srcFileList{$path}->{$item}->{'atime'} = $atime;
		$srcFileList{$path}->{$item}->{'mtime'} = $mtime;
		$srcFileList{$path}->{$item}->{'uid'} = $uid;
		$srcFileList{$path}->{$item}->{'gid'} = $gid;
		$srcFileList{$path}->{$item}->{'mode'} = $mode;
		$srcFileList{$path}->{$item}->{'_state'} = $state;
	}


	# Time to do stuff
	sub backup_postprocess {
		# Strip first part of the path
		(my $path = $File::Find::dir) =~ s#^$source/?##;
		# Get current lists
		my $curDirList = $srcDirList{$path};
		my $curFileList = $srcFileList{$path};

		# Compare the two file lists, we know what was added, lets see if anything was removed
		foreach my $fname (keys %{$origFileList{$path}}) {
			if (!defined($srcFileList{$path}->{$fname})) {
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				printLog(LOG_DEBUG,"File '[$source]/($path)/$fname' removed\n");
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				$doBackup{$path} |= ST_FILE_CHANGED;
			}
		}

		# Create backup dir
		if (($doBackup{$path} & ST_DIR_NEW) == ST_DIR_NEW && ! -d "$dest/$path") {
			mkpath("$dest/$path");
		}

		# Check if we need to backup this dir
		if (($doBackup{$path} & ST_FILE_CHANGED) == ST_FILE_CHANGED) {
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			printLog(LOG_INFO,"B: Path '[$source]/$path' backing up\n");
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			# If we not backing up a system dir, we create a manifest and backup the files
			if (($doBackup{$path} & ST_DIR_SYS) != ST_DIR_SYS) {
				# Did file contents change?
				my $changedFiles = 0;
				my $changedAttrs = 0;
				my @newFiles = ();
				my @manifestList;

				# Take a look quick...
				foreach my $item (sort keys %{$curFileList}) {
					# Lets see whats happened...
					if (($curFileList->{$item}->{'_state'} & ST_FILE_NEW) == ST_FILE_NEW) {
						push(@newFiles,$item);
					}
					if (($curFileList->{$item}->{'_state'} & ST_FILE_CHANGED) == ST_FILE_CHANGED) {
						$changedFiles = 1;
					}
					if (($curFileList->{$item}->{'_state'} & ST_FILE_ATTR_CHANGED) == ST_FILE_ATTR_CHANGED) {
						$changedAttrs = 1;
					}
				}

				# If we don't have a sequence, this is a new backup?
				if (!defined($newPathAttribs{$path}->{'sequence'} = $origPathAttribs{$path}->{'sequence'})) {
					$newPathAttribs{$path}->{'sequence'} = 0;
					@manifestList = keys %{$curFileList};
				} else {
					# If this is new files, then just inc the counter
					if (@newFiles > 0 && !$changedFiles && !$changedAttrs) {
						$newPathAttribs{$path}->{'sequence'}++;
						@manifestList = @newFiles;
					# If files changed we blow everything away
					} else {
						$newPathAttribs{$path}->{'sequence'} = 0;
						# Remove old files	
						removeBackups(
								"$dest/$path",
								$origPathAttribs{$path}->{'format'},
								$origPathAttribs{$path}->{'compression'},
								$origPathAttribs{$path}->{'sequence'}
						);
						@manifestList = keys %{$curFileList};
					}
				}


				# Get current sequence
				my $seq = $newPathAttribs{$path}->{'sequence'};

				# File list to backup
				open(MANIFEST,"> $dest/$path/dbackup$seq.manifest")
						or die "Failed to open '$dest/$path/dbackup$seq.manifest': $!";
				foreach my $item (@manifestList) {
					# If this is not the top dir, use /
					if ($path ne "") {
						print(MANIFEST "$path/$item\0");
					# If it is, don't use /
					} else {
						print(MANIFEST "$item\0");
					}
				}
				close(MANIFEST);

				# Setup tar args
				my @tarArgs = ();
				my $tarExt;
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				if ($config{'compress'} eq "xz") {
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					push(@tarArgs,"--xz");
					$tarExt = ".xz";
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				} elsif ($config{'compress'} eq "bzip2") {
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					push(@tarArgs,"--bzip2");
					$tarExt = ".bz2";
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				} elsif ($config{'compress'} eq "gzip") {
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					push(@tarArgs,"--gzip");
					$tarExt = ".gz";
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				} elsif ($config{'compress'} eq "none") {
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					$tarExt = "";
				}

				# Save format and compression
				$newPathAttribs{$path}->{'format'} = "tar";
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				$newPathAttribs{$path}->{'compression'} = $config{'compress'};
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				# Change dir and start backup
				system(
					"tar", 
					"--create",
					"--verbose",
					# Output file
					"--file", "$dest/$path/dbackup$seq.tar$tarExt",
					# cd into here first...
					"--directory", "$source",
					# Read file list from here
					"--null",
					"--files-from", "$dest/$path/dbackup$seq.manifest",
					"--no-unquote",
					# Do not recurse
					"--no-recursion",
					# Output to this file
					"--index-file", "$dest/$path/dbackup$seq.index",
					# Incremental options
#					"--listed-incremental", "$dest/$path/dbackup.snar",
#					"--no-check-device",
					@tarArgs
				);
				if ($? == -1) {
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					printLog(LOG_ERROR,"Failed to execute: $!\n");
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					exit 1;
				} elsif ($? & 127) {
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					printLog(LOG_ERROR,"Child died with signal %d\n",($? & 127));
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					exit 1;
				} else {
					my $retcode = $? >> 8;
					# If tar died, lets die too
					if ($retcode == 2) {
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						printLog(LOG_ERROR,"tar died with error code $retcode\n");
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						exit 1;
					}
				}
			# if (($doBackup{$path} & ST_DIR_SYS) != ST_DIR_SYS) {
			} else {
					# Remove old files	
					removeBackups(
							"$dest/$path",
							$origPathAttribs{$path}->{'format'},
							$origPathAttribs{$path}->{'compression'},
							$origPathAttribs{$path}->{'sequence'}
					);
			}
		} # if (($doBackup{$path} & ST_FILE_CHANGED) == ST_FILE_CHANGED) {


		# Check if we need to record directory changes...
		if (
					($doBackup{$path} & ST_FILE_CHANGED) == ST_FILE_CHANGED ||
					($doBackup{$path} & ST_DIR_CHANGED) == ST_DIR_CHANGED ||
					($doBackup{$path} & ST_DIR_NEW) == ST_DIR_NEW
		) {
			# If we have a revision, bump it
			if (defined($newPathAttribs{$path}->{'revision'} = $origPathAttribs{$path}->{'revision'})) {
				$newPathAttribs{$path}->{'revision'} = $origPathAttribs{$path}->{'revision'} + 1;
			} else {
				$newPathAttribs{$path}->{'revision'} = 0;
			}

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			printLog(LOG_DEBUG,"B: Writing state '[$source]/$path' - revision ".$newPathAttribs{$path}->{'revision'}."\n");
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			# Write out state, we do this AFTER we have backed up, so if we stopped, we can just  continue
			my $gz = gzopen("$dest/$path/.dbackup-state","wb")
					or die "Failed to open '$dest/$path/.dbackup-state': $!";
			# Write out attributes
			$gz->gzwrite(join("\0",
					"a",
					"dbackup.version",
					$VERSION
				)."\n"
			);
			# Loop with attributes
			foreach my $item (keys %{$newPathAttribs{$path}}) {
				$gz->gzwrite(join("\0",
						"a",
						$item,
						$newPathAttribs{$path}->{$item}	
					)."\n"
				);
			}
			# Loop with directory list
			foreach my $item (sort keys %{$curDirList}) {
				my $ename = encode_base64($item);
				$ename =~ s/\n//g;
				# Save state of source files
				$gz->gzwrite(join("\0",
						"d",
						$ename,
						$curDirList->{$item}->{'ctime'},
						$curDirList->{$item}->{'atime'},
						$curDirList->{$item}->{'mtime'},
						$curDirList->{$item}->{'uid'},
						$curDirList->{$item}->{'gid'},
						$curDirList->{$item}->{'mode'}
					)."\n"
				);
			}
			# Loop with file list
			foreach my $item (sort keys %{$curFileList}) {
				my $ename = encode_base64($item);
				$ename =~ s/\n//g;
				# Save state of source files
				$gz->gzwrite(join("\0",
						"f",
						$ename,
						$curFileList->{$item}->{'size'},
						$curFileList->{$item}->{'ctime'},
						$curFileList->{$item}->{'atime'},
						$curFileList->{$item}->{'mtime'},
						$curFileList->{$item}->{'uid'},
						$curFileList->{$item}->{'gid'},
						$curFileList->{$item}->{'mode'}
					)."\n"
				);
			}
			# Finally close
			$gz->gzclose();
		}

		# State clear
		delete($origFileList{$path});
	}

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	printLog(LOG_NOTICE,"BACKUP START: $source => $dest\n");
	printLog(LOG_INFO,"Compression: ".$config{'compress'}."\n");
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	# Check if we excluding system files
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	if ($config{'exclude-system'}) {
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		printLog(LOG_NOTICE,"Exclude System Base: ".join(", ",@{$config{'system-base'}})."\n");
		printLog(LOG_NOTICE,"Exclude System Dirs: ".join(", ",@defaultSystemExcl,@{$config{'system-dir'}})."\n");
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		# If we excluding data too...
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		if ($config{'exclude-data'}) {
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			printLog(LOG_NOTICE,"Exclude Data Dirs: ".join(", ",@defaultDataExcl,@{$config{'data-dir'}})."\n");
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		}
	}
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	printLog(LOG_NOTICE,"Exclude Files: ".join(", ",@{$config{'exclude-file'}})."\n");
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	# We need an entry for our main dir before we start
	$doBackup{""} = 0;

	# This basically does our backup for us...
	find (
		{ 
			preprocess => \&backup_preprocess,
			wanted => \&backup_process,
			postprocess => \&backup_postprocess
		},
		$source
	);


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	printLog(LOG_INFO,"Processing stale directories...\n");
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	my @rmlist;
	# Total item by item
	find (
		{ 
			wanted => sub { },
			# We just need post processing ...
			postprocess => sub {
				# Strip first part of the path
				(my $path = $File::Find::dir) =~ s#^$dest/?##;
				# Does this dir exist on the backup, but not on the fileserver?
				if (!defined($srcFileList{$path})) {
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					push(@rmlist,$path);
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				}
			},
		},
		$dest
	);
	foreach my $rmitem ( @rmlist ) {
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		printLog(LOG_DEBUG,"Remove path '[$dest]/$rmitem'\n");
   		rmtree("$dest/$rmitem");
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	}

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	printLog(LOG_NOTICE,"BACKUP END\n");
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}


# Do backup
if (defined($optctl{'backup'})) {
	backup($sourceDir,$destDir);

} elsif (defined($optctl{'restore'})) {
	restore($sourceDir,$destDir);

} else {
	print(STDERR "ERROR: No command given\n\n");
	displayHelp();
	exit 1;
}


# Restore function
sub restore
{
	our ($source,$dest) = @_;

	# State infor for current dir
#	our %doBackup;
#	our %srcFileList;
#	our %srcDirList;
	our %origFileList;
	our %origDirList;
	our %origPathAttribs;


	# Preprocess dir
	sub restore_preprocess {
		my @list = @_;

		# Strip first part of the path
		(my $path = $File::Find::dir) =~ s#^$source/?##;

		# Check if we have all our source files
		if ( ! -f "$source/$path/.dbackup-state" ) {
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			printLog(LOG_WARNING,"S: Path '[$source]/($path)' is MISSING .dbackup-state\n");
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			return @list;
		}

		# Load state file
		loadStateFile("$source/$path/.dbackup-state",$path,\%origFileList,\%origDirList,\%origPathAttribs);

		# Check we have at least the version attribute
		if (!defined($origPathAttribs{$path}) || !defined($origPathAttribs{$path}->{'dbackup.version'})) {
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			printLog(LOG_ERROR, "No dbackup version information found in '$source/$path/.dbackup-state', IGNORING\n");
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			delete($origDirList{$path});
			delete($origFileList{$path});
			return @list;
		}

		# During our check, we need to create the dir, we may not have a backup file
		# so we do it here.
		if ( ! -d "$dest/$path") {
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			printLog(LOG_INFO,"R: Path '[$dest]/($path)' creating directory\n");
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			mkpath("$dest/$path");
		}

		# The lack of a sequence number probably means we didn't output any tar files during backup
		if (!defined($origPathAttribs{$path}->{'sequence'})) {
			return @list;
		}

		# Loop through backup sequences
		for (my $seq = 0; $seq <= $origPathAttribs{$path}->{'sequence'}; $seq++) {
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			printLog(LOG_DEBUG,"R: Path '[$dest]/$path' restoring files ".($seq+1)." of ".
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					($origPathAttribs{$path}->{'sequence'}+1)."\n");

			# Args for tar
			my @tarArgs = ();

			my $tarExt;
			if ($origPathAttribs{$path}->{'compression'} eq "xz") {
				push(@tarArgs,"--xz");
				$tarExt = ".xz";
			} elsif ($origPathAttribs{$path}->{'compression'} eq "bzip2") {
				push(@tarArgs,"--bzip2");
				$tarExt = ".bz2";
			} elsif ($origPathAttribs{$path}->{'compression'} eq "gzip") {
				push(@tarArgs,"--gzip");
				$tarExt = ".gz";
			} elsif ($origPathAttribs{$path}->{'compression'} eq "none") {
				$tarExt = "";
			}

			# Check what type of backup we did
			if ( ! -f "$source/$path/dbackup$seq.tar$tarExt" ) {
				# If we have any other part of the backup, show a message
				if (
							( -f "$source/$path/dbackup$seq.index" || 
							-f "$source/$path/dbackup$seq.manifest" ||
							-f "$source/$path/dbackup$seq.snar" ) && $seq > 0
				) {
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					printLog(LOG_WARNING,"Backup file '$source/$path/dbackup$seq.tar$tarExt' not found, IGNORING\n");
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				}

				return @list;
			}

			# Check we have files we need/created
			if ( ! -f "$source/$path/dbackup$seq.index" ) {
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				printLog(LOG_WARNING,"Manifest file '$source/$path/dbackup$seq.index' not found\n");
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				return @list;
			}
			if ( ! -f "$source/$path/dbackup$seq.manifest" ) {
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				printLog(LOG_WARNING,"Manifest file '$source/$path/dbackup$seq.manifest' not found\n");
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				return @list;
			}

			# Other tar options
			if (defined($optctl{'tar-keep-newer'})) {
				push(@tarArgs,"--keep-newer-files");
			}
			if (defined($optctl{'tar-keep-old-files'})) {
				push(@tarArgs,"--keep-old-files");
			}

			# Change dir and start backup
			system(
				"tar", 
				"--extract",
				# Output file
				"--file", "$source/$path/dbackup$seq.tar$tarExt",
				# cd into here first...
				"--directory", "$dest",
				# Read file list from here
				"--null",
				"--files-from", "$source/$path/dbackup$seq.manifest",
				"--no-unquote",
				# Do not recurse
				"--no-recursion",
				# Incremental options
#			"--incremental",
				@tarArgs
			);
			if ($? == -1) {
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				printLog(LOG_ERROR,"Failed to execute: $!\n");
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				exit 1;
			} elsif ($? & 127) {
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				printLog(LOG_ERROR,"Child died with signal %d\n",($? & 127));
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				exit 1;
			} else {
				my $retcode = $? >> 8;
				# If tar died, lets die too
				if ($retcode == 2) {
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					printLog(LOG_ERROR,"tar died with error code $retcode\n");
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					exit 1;
				}
			}
		}

		return @list;
	}

	# Process files
	sub restore_process {
		my $name = $File::Find::name;
		# Strip first part of the path
		(my $path = $File::Find::dir) =~ s#^$source/?##;

		# Store current filename
		my $item = $_;

#		print(STDERR "PROCESS: Path = $path, Name = $name, Item = $item)\n");
	}


	# Time to do stuff
	sub restore_postprocess {
		# Strip first part of the path
		(my $path = $File::Find::dir) =~ s#^$source/?##;

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		printLog(LOG_DEBUG,"R: Path '[$dest]/$path' restoring attributes\n");
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		# Loop with directories in this path
		foreach my $dname (keys %{$origDirList{$path}}) {
			# Set dir
			my $dir = $origDirList{$path}->{$dname};

			# Full dirname
			my $fdirname = "$dest/$path/$dname";

			# Restore attribs
			if (!chown($dir->{'uid'},$dir->{'gid'},$fdirname)) {
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				printLog(LOG_ERROR,"Failed to chown(".$dir->{'uid'}.",".$dir->{'gid'}.") '$fdirname': $!\n");
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			}
			if (!chmod($dir->{'mode'},$fdirname)) {
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				printLog(LOG_ERROR,"Failed to chmod(".$dir->{'mode'}.") '$fdirname': $!\n");
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			}
			if (!utime($dir->{'atime'},$dir->{'mtime'},$fdirname)) {
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				printLog(LOG_ERROR,"Failed to utime(".$dir->{'atime'}.",".$dir->{'mtime'}.") '$fdirname': $!\n");
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			}
		}

		# Loop with files in this path
		foreach my $fname (keys %{$origFileList{$path}}) {
			# Set dir
			my $file = $origFileList{$path}->{$fname};

			# Full dirname
			my $ffilename = "$dest/$path/$fname";

			# Restore attribs
			if (!chown($file->{'uid'},$file->{'gid'},$ffilename)) {
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				printLog(LOG_ERROR,"Failed to chown(".$file->{'uid'}.",".$file->{'gid'}.") '$ffilename': $!\n");
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			}
			if (!chmod($file->{'mode'},$ffilename)) {
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				printLog(LOG_ERROR,"Failed to chmod(".$file->{'mode'}.") '$ffilename': $!\n");
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			}
			if (!utime($file->{'atime'},$file->{'mtime'},$ffilename)) {
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				printLog(LOG_ERROR,"Failed to utime(".$file->{'atime'}.",".$file->{'mtime'}.") '$ffilename': $!\n");
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			}
		}
	}

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	printLog(LOG_NOTICE,"RESTORE START: $source => $dest\n");
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	# This basically does our backup for us...
	find (
		{ 
			preprocess => \&restore_preprocess,
			wanted => \&restore_process,
			postprocess => \&restore_postprocess
		},
		$source
	);

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	printLog(LOG_NOTICE,"RESTORE END\n");
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}


# Display log line
sub printLog {
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	my ($level,$msg,@args) = @_;


	# Work out level txt all nicely
	my $levelTxt = "UNKNOWN";
	if ($level == LOG_DEBUG) {
		$levelTxt = "DEBUG";
	} elsif ($level == LOG_INFO) {
		$levelTxt = "INFO";
	} elsif ($level == LOG_NOTICE) {
		$levelTxt = "NOTICE";
	} elsif ($level == LOG_WARNING) {
		$levelTxt = "WARNING";
	} elsif ($level == LOG_DEBUG) {
		$levelTxt = "DEBUG";
	}
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	# Check log level
	if ($level >= $config{'log-level'}) {
		printf(STDERR "%s/$levelTxt: %s", strftime('%F %T',localtime()), $msg, @args);
	}
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}



# Display usage
sub displayHelp {
	# Build some strings we need
	my $systemDirStr = join (", ",@defaultSystemExcl);
	my $dataDirStr = join (", ",@defaultDataExcl);

	print(STDERR<<EOF);
Usage: $0 [args] <src> <dst>

    General Options:
      --help                             What you seeing now.
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      --config=file                      Config file to use.
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      --log-level                        1 = debug, 2 = info, 3 = notice
                                         4 = warning, 5 = debug
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    Backing Options:
      --backup|-b                        Backup src to dst.
      --compress=<xz|bz2|gz|none>        Compression method to use defaults
                                         to using xz, or bzip2 if xz unavail.

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      --exclude-data                     Exclude all data dirs listed below.
      --exclude-system                   Exclude system dirs listed below.

      --exclude-path=pcre                PCRE to exclude paths from backup.
      --exclude-file=pcre                PCRE to exclude files from backup.

      --data-dir=dir                     Add an additional data directory.
      --system-dir=dir                   Add an additional systemd directory.
      --system-base=path                 Add a system base. This defaults to /
                                         and this option will override that.
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    Restore Options:
      --restore|-r                       Restore src to dst.
      --tar-keep-newer                   Do not overwrite newer files.
      --tar-keep-old-files               Don't replace existing files.


Builtins:
---------
    system-dirs:
      $systemDirStr

    data-dirs:
      $dataDirStr
EOF
} 


#
# LIBRARY
#

sub loadStateFile {
		my ($statefile,$key,$fileList,$dirList,$pathAttribs) = @_;


		# Read in backup state file, we do it here because we may not have a backup file
		# to restore
		my $gz = gzopen($statefile,"rb") 
				or die "FATAL ERROR: Failed to open '$statefile': $!";
		# Read in file list
		my $line;
		while ($gz->gzreadline($line) > 0) {
			chomp($line);
			# Pull out array of items
			my @aline = split(/\0/,$line);
			my $type = shift(@aline);
			# Check if its defined
			if (defined($type)) {
				# If its a file...
				if ($type eq "f") {
					my ($ename,$size,$ctime,$atime,$mtime,$uid,$gid,$mode) = @aline;
					my $name = decode_base64($ename);
					# Setup our hash
					$fileList->{$key}->{$name}->{'size'} = $size;
					$fileList->{$key}->{$name}->{'ctime'} = $ctime;
					$fileList->{$key}->{$name}->{'atime'} = $atime;
					$fileList->{$key}->{$name}->{'mtime'} = $mtime;
					$fileList->{$key}->{$name}->{'uid'} = $uid;
					$fileList->{$key}->{$name}->{'gid'} = $gid;
					$fileList->{$key}->{$name}->{'mode'} = $mode;
				# If its a dir
				} elsif ($type eq "d") {
					my ($ename,$ctime,$atime,$mtime,$uid,$gid,$mode) = @aline;
					my $name = decode_base64($ename);
					# Setup our hash
					$dirList->{$key}->{$name}->{'ctime'} = $ctime;
					$dirList->{$key}->{$name}->{'atime'} = $atime;
					$dirList->{$key}->{$name}->{'mtime'} = $mtime;
					$dirList->{$key}->{$name}->{'uid'} = $uid;
					$dirList->{$key}->{$name}->{'gid'} = $gid;
					$dirList->{$key}->{$name}->{'mode'} = $mode;
				# Attribute
				} elsif ($type eq "a") {
					my ($name,$value) = @aline;
					$pathAttribs->{$key}->{$name} = $value;
				# Unknown
				} else {
					print(STDERR "ERROR: Invalid type '$type' in '$statefile'\n");
					exit 1;
				}
			}
		}
		# Close gzip file
		$gz->gzclose();
}


sub removeBackups
{
	my ($path,$format,$compression,$seqs) = @_;


	# Loop through backup sequences
	for (my $i = 0; $i <= $seqs; $i++) {

		my $tarExt;
		if ($compression eq "xz") {
			$tarExt = ".xz";
		} elsif ($compression eq "bzip2") {
			$tarExt = ".bz2";
		} elsif ($compression eq "gzip") {
			$tarExt = ".gz";
		} elsif ($compression eq "none") {
			$tarExt = "";
		}

		# Unlink backup files
		if (-f "$path/dbackup$i.tar$tarExt") {
			unlink("$path/dbackup$i.tar$tarExt")
					or die "ERROR: Failed to remove file '$path/dbackup$i.tar$tarExt': $!";
		}
		# Unlink manifest
		if (-f "$path/dbackup$i.manifest") {
			unlink("$path/dbackup$i.manifest")
					or die "ERROR: Failed to remove file '$path/dbackup$i.manifest': $!";
		}
		# Unlink index
		if (-f "$path/dbackup$i.index") {
			unlink("$path/dbackup$i.index")
					or die "ERROR: Failed to remove file '$path/dbackup$i.index': $!";
		}
		# Unlink snar
		if (-f "$path/dbackup$i.snar") {
			unlink("$path/dbackup$i.snar")
					or die "ERROR: Failed to remove file '$path/dbackup$i.snar': $!";
		}

	}
}

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sub toArray
{
	my $param = shift;

	if (ref $param eq "ARRAY") {
		return $param;
	} else {
		return [$param];
	}
}
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# vim: ts=4