return -1;
return (-1);
togglevar(argc, argv, var, mesg)	int   argc;	char *argv[];	int  *var;	const char *mesg;{	if (argc < 2) {		*var = !*var;	} else if (argc == 2 && strcasecmp(argv[1], "on") == 0) {		*var = 1;	} else if (argc == 2 && strcasecmp(argv[1], "off") == 0) {		*var = 0;	} else {		printf("usage: %s [ on | off ]\n", argv[0]);		return -1;	}	if (mesg)		printf("%s %s.\n", mesg, onoff(*var));	return (*var);}