Function opt_usage_exit_fail

ccan/ccan/opt/usage.c:238–250

}

void opt_usage_exit_fail(const char *msg, ...)
{
	va_list ap;

	if (opt_argv0)
		fprintf(stderr, "%s: ", opt_argv0);
	va_start(ap, msg);
	vfprintf(stderr, msg, ap);
	va_end(ap);
	fprintf(stderr, "\n%s",
		opt_usage(opt_argv0 ? opt_argv0 : "<program>", NULL));
	exit(1);
}