/*
 * $snafu: garload.c,v 2.0 2003/10/06 19:14:06 marc Exp $
 *
 * Placed in the Public Domain by 1998 Marco S. Hyman
 */

#include <sys/types.h>

#include <err.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "gpslib.h"

static void
usage(const char* prog, const char* err, ...)
{
	if (err) {
		va_list ap;
		va_start(ap, err);
		vfprintf(stderr, err, ap);
		va_end(ap);
	}
	fprintf(stderr, "usage: %s [-v] [-d debug-level] [-p port]\n", prog);
	exit(1);
}

int
main(int argc, char * argv[])
{
	int debug = 0;
	const char* port = DEFAULT_PORT;

	int opt;
	char* rem;
	gps_handle gps;
	struct gps_lists *lists;

	while ((opt = getopt(argc, argv, "d:vp:")) != -1) {
		switch (opt) {
		case 'd':
			debug = strtol(optarg, &rem, 0);
			if (*rem)
				debug = 0;
			if (!debug)
				usage(argv[0], "`%s' is a bad debug value\n",
				      optarg);
			break;
		case 'p':
			port = strdup(optarg);
			break;
		case 'v':
			errx(1, "software version %s", VERSION);
			/* does not return */
		case '?':
		default:
			usage(argv[ 0 ], 0);
			/* does not return */
		}
	}

	if (argc != optind)
		errx(1, "unknown command line argument: %s ...", argv[optind]);

	gps = gps_open(port, debug);
	if (gps_version(gps) != 1)
		errx(1, "can't communicate with GPS unit");

	lists = gps_format(gps, stdin);
	if (!lists)
		errx(1, "no valid GPS data found");

	if (gps_load(gps, lists) < 0)
		errx(1, "failure uploading GPS unit");

	return 0;
}