fprintf(stderr, "Usage: %s [-v|-r|-z] [-a] [-c count] [-w wait] [interface]\n", progname);
extern char *__progname;  fprintf(stderr, "Usage: %s [-a|-d] [-v|-r|-z] [-c count] [-w wait] [interface]\n", __progname);
usage(){	fprintf(stderr, "Usage: %s [-v|-r|-z] [-a] [-c count] [-w wait] [interface]\n",		progname);	exit(1);}