Function vsnprintf

payloads/libpayload/libc/printf.c:770–781

}

int vsnprintf(char *str, size_t size, const char *fmt, va_list ap)
{
	struct vsnprintf_data data = { size, 0, str };
	struct printf_spec ps = { vsnprintf_write, &data };

	/* Print 0 at end of string - fix case that nothing will be printed. */
	if (size > 0)
		str[0] = 0;

	/* vsnprintf_write() ensures that str will be terminated by zero. */
	return printf_core(fmt, &ps, ap);
}

int vsprintf(char *str, const char *fmt, va_list ap)
{