#!/usr/bin/perl 

use strict;
use warnings;
use Win32::DriveInfo;
use File::Path; 
use Net::FTP;
## define variables
#

my %parameters;
my $remote_server ;
my $username ;
my $password ;
my $backup_dir ;
my $backup_file_numbers ;
my $driver_freespace ;
my $remote_backup_dir ;
my $remote_file ;
my $file_name;
my $new_directory;




# Read parameters from CFG
##
sub read_par {
open (STDERR, ">>backup_err.log") or die "can't redirect STDERR $!\n";
print STDERR "Backup begin at: ",scalar localtime,"\n\n";

open (CFG,"<auto_backup.ini") or die "Can't open config file $!\n";
while (<CFG>) {
    chomp;             
    s/#.*//;            
    s/^\s+//;            
    s/\s+$//;             
    next unless length;    
    my ($var, $value) = split(/\s*?=\s*?/, $_, 2);
    $parameters{$var} = $value;
}
close CFG;
$remote_server = $parameters{'remote_server'} || "192.168.0.1";
$username = $parameters{'username'} || "dgc2000";
$password = $parameters{'password'} || "Dgc2000";
$backup_dir = $parameters{'backup_dir'} || 'D:\backup';
$backup_file_numbers = $parameters{'backup_file_numbers'} || '20';
$driver_freespace = $parameters{'driver_freespace'} || '5';
$remote_backup_dir = $parameters{'remote_backup_dir'} || "/usr/backup";
$remote_file = $parameters{'remote_file'}  || "dgc2000_backup.tar";
}


#check driver space
#

sub check_space{

my $freebytes = Win32::DriveInfo::DriveSpace('d');
die scalar localtime,": Backup will be forcibly stopped due to the insufficent system space, please check driver and set it free. \n\n" if $freebytes < $driver_freespace;
}

## check directory and create new.
#

sub check_dir{
opendir(DIR, $backup_dir) or die "can't opendir $backup_dir:$!";
my @dots = sort {[stat($a)]->[9] <=> [stat($b)]->[9]} grep {!/\.$/ && -d} map {join '\\', $backup_dir,$_} readdir(DIR);
if (@dots > 1) {
	map {rmtree($_)} [@dots[1..$#dots]];
}
}

# create new directory

sub create_dir{
my $localtime = scalar localtime;
$localtime =~ s/:|\s/_/g;
$new_directory = join ('\\',$backup_dir,$localtime);
mkpath($new_directory) or die "error!!\n $!";
}

# create ftp connection and fetch file.
#
sub fetch_file {
my $ftp = Net::FTP->new($remote_server) or die "Cannot connect to $remote_server: $@";
$ftp->login($username, $password) or die "Cannot login",$ftp->message;
print $remote_backup_dir;
$ftp->cwd($remote_backup_dir) or die "Cannot change working directory ", $ftp->message;
$ftp->binary;
$ftp->get($remote_file, $remote_file, $new_directory) or die "get failed", $ftp->message;
$ftp->delete($remote_file) or die "Can't delete", $ftp->message;
$ftp->quit;
die "backup end successfully at: ",scalar localtime,"\n\n";
}

sub init {
	read_par();
    check_space();
	check_dir();
}


sub backup {
	create_dir();
	fetch_file();
}

init();
backup();

__output__

Backup begin at: Tue Sep  4 12:33:04 2007

get failed'REST D:\backup\Tue_Sep__4_12_33_04_2007': command not understood.