ipp_request_write
if (ipp_request_write(svc, chunk, chunk_size) != chunk_size)
if (ipp_request_write(svc, buf, rc)
(void) ipp_request_write(svc, "", 0);
rc = ipp_request_write(svc, buffer, buflen);
(void) ipp_request_write(svc, "", 0);
extern ssize_t ipp_request_write(void *fd, void *buffer, size_t length);