#! /usr/bin/perl -w

# db-backup.pl
# Dump and gzip each MySQL database.

use strict;
use DBI;

my $dbhost  = "localhost";
my $dbuser  = "root";
my $dbpass  = "easyONE";
my $date    = "`date +%Y-%m-%d`";
my $path    = "/your/archive/db";
my $ext     = "bz2";

flush_old($path,$ext);
my($dbh,$sth,$query);

my $dsn = "DBI:mysql:host=$dbhost";
$dbh    = DBI->connect($dsn,$dbuser,$dbpass,{PrintError => 0, RaiseError => 1});
$query  = qq^SHOW DATABASES^;
$sth    = $dbh->prepare($query);
$sth->execute();

while(my $ref = $sth->fetchrow_array()) {
    my @bp = `mysqldump --user=$dbuser --password=$dbpass --add-drop-table $ref | bzip2 -1 > $path/$ref.$date.$ext`;
}

$sth->finish();
$dbh->disconnect();

# - - - - - - - - - - - - - - - - -
sub flush_old {
   my ($path,$ext) = @_;
   opendir BP_DIR,"$path" or die "Cannot open $path: $!\n";
        my @old_backups = grep { /\.$ext$/ } readdir BP_DIR;
   closedir BP_DIR;

   for (@old_backups) {
        my @args = ("rm","-f","$path/$_");
        system(@args);
   }
}