#!/bin/sh

PRODUCT_ROOT_D=/usr/local/psa

get_random_number()
{
	perl -e '
	 my $res = int(rand($ARGV[0]));
	 if (exists $ARGV[1]) {
	  $res = $res + $ARGV[1];
	 }
	 print $res;
	' "$@"
}

install_cron_backup()
{
	[ ! -s "/etc/cron.d/plesk-backup-manager" ] || return
	minutes=`get_random_number 15`

	cat >/etc/cron.d/plesk-backup-manager <<-EOF
$minutes,`expr $minutes + 15`,`expr $minutes + 30`,`expr $minutes + 45`	*	*	*	*	root [ -x $PRODUCT_ROOT_D/admin/sbin/backupmng ] && $PRODUCT_ROOT_D/admin/sbin/backupmng >/dev/null 2>&1
EOF
}

install_cron_backup