#!/bin/sh

PATH=/bin:/usr/bin:/usr/local/bin

TEMP=`getopt -o rwtd: --long get-routes,get-waypts,get-tracks,device: \
     -n $0 -- "$@"`

if [ $? != 0 ] ; then 
	echo "Usage: $0 [-r|--get-routes]|[-w|--get-waypts]|[-t|--get-tracks] [-d device|--device device]" >&2 ;
	echo "defaults are: --get-waypts and --device /dev/gps" >&2 ;
	exit 1 ; 
fi

eval set -- "$TEMP"

opt="";
device="/dev/gps";

while true ; do
	case "$1" in
		-r|--get-routes) opt="$opt -r" ; shift ;;
		-w|--get-waypts) opt="$opt -w" ; shift ;;
		-t|--get-tracks) opt="$opt -t" ; shift ;;
		-d|--device) 
			case "$2" in 
				"") echo "Internal error!" >&2 ; exit 1;;
				*) device=$2 ; shift 2 ;;
			esac ;;
		--) shift ; break ;;
		*) echo "Internal error!" >&2 ; exit 1 ;;
	esac
done

opt=${opt:= -w}
if [[ ${#opt} != "3" && ${#opt} != "12" ]]; then
	echo "Usage: $0 [-r|--get-routes]|[-w|--get-waypts]|[-t|--get-tracks] [-d device|--device device]" >&2 ;
	echo "defaults are: --get-waypts and --device /dev/gps" >&2 ;
	exit 1 ; 
fi

if ! [ -c $device -o -h $device -a -r $device ]; then
	echo "device must be a readable character device node" >&2;
	echo "or a link to a character device node." >&2;
	exit 1;
fi

# Create a temporary file
TMPFILE=`mktemp -q /tmp/wpget.XXXXXX`
           if [ $? -ne 0 ]; then
                   echo "$0: Can't create temp file, exiting..." >&2 
                   exit 1
           fi

case "$opt" in
	" -r") garble -r -d $device ;;
	" -w") garble -w -d $device | wpcvt ;;
	" -t") garble -t -d $device | wpcvt ;;
	*) echo "Internal error !" >&2 ; exit 1 ;;
esac

rm $TMPFILE
exit 0