parwrite
parwrite(FD, CM, size(CM));
parwrite(FD, CM, size(CM));
parwrite(FD, buf, size(buf));
parwrite(FD, &r, 1);
parwrite(FD, &cc, 1);
parwrite(FD, &null, 1); /* poke it */
parwrite(FD, &ch, 1);
parwrite(FD, &ch, 1);
parwrite(FD, &c, 1);
void parwrite(int, char *, size_t);
parwrite(fd, size, off * size);