+# source external command line parameter-processing script
+. $prog_real.clp
+
+# business-logic of command line parameter-processing
+[ "$_opt_mirror" ] && MIRROR=$_opt_mirror
+[ "$_opt_iso" ] && ISO=$_opt_iso
+[ "$_opt_release" ] && RELEASE=$_opt_release
+[ "$_opt_target" ] && TARGET=$_opt_target
+[ "$_opt_mntpoint" ] && MNTPOINT=$_opt_mntpoint
+[ "$_opt_debopt" ] && DEBOOTSTRAP_OPT=$_opt_debopt
+[ "$_opt_interactive" ] && INTERACTIVE=1
+[ "$_opt_confdir" ] && CONFFILES=$_opt_confdir
+[ "$_opt_config" ] && CONFIGFILE=$_opt_config
+[ "$_opt_packages_set" ] && PACKAGES='yes'
+[ "$_opt_debconf_set" ] && DEBCONF='yes'
+[ "$_opt_keep_src_list" ] && KEEP_SRC_LIST='yes'
+[ "$_opt_hostname" ] && HOSTNAME=$_opt_hostname
+[ "$_opt_password" ] && ROOTPASSWORD=$_opt_password
+[ "$_opt_bootappend" ] && BOOT_APPEND=$_opt_bootappend
+[ "$_opt_groot" ] && GROOT=$_opt_groot
+[ "$_opt_grub" ] && GRUB=$_opt_grub
+
+[ "$_opt_help" ] && {
+ usage ; eend 0
+ eend 0
+ exit 0
+}