write_retry
w = write_retry(STDOUT_FILENO, prepend, count);
if (write_retry(STDOUT_FILENO, buf, rv) != rv) {
static ssize_t write_retry(int, const void *, size_t);
if (write_retry(out, outbufp, BUFLEN) != BUFLEN) {
w = write_retry(out, outbufp, len);
if (write_retry(out, outbufp, i) != i) {
write_retry(out, outbufp, wr) != wr) {