c printf to string

1// int sprintf(char *str, const char *format, ...);
2char *printf_to_string()
3{
4  char buffer[128] = {0} //Must be big enough
5
6  // writing printf output in buffer
7  sprintf(buffer, "some %s here...\n", "text");
8  // duplicate if needed
9  return strdup(buffer);
10}