buf_write_fd
if (buf_write_fd(b, fd) == -1) {
if (buf_write_fd(b, fd) == -1) {
int buf_write_fd(BUF *, int);
if (buf_write_fd(b, fd) == -1) {
if (buf_write_fd(b, fd) == -1) {
int buf_write_fd(BUF *, int);
buf_write_fd(bp, STDOUT_FILENO);
if (buf_write_fd(bp, fd) < 0) {
buf_write_fd(bp, STDOUT_FILENO);
buf_write_fd(bp, STDOUT_FILENO);
buf_write_fd(bp, STDOUT_FILENO);