xwrite
if ((res = xwrite(arfd, buf, bsz)) == bsz) {
res = xwrite(fd2, buf, cnt);
int xwrite(int, void *, int);
} else if (xwrite(fd, st, wcnt) != wcnt) {
if ((xwrite(dirfd, name, dblk.nlen) == dblk.nlen) &&
(xwrite(dirfd, (char *)&dblk, sizeof(dblk)) == sizeof(dblk))) {
if (xwrite(ffd, arcn->name, namelen) == namelen) {
if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
int xwrite(int, char *, int);
xwrite(pip[1], redir->nhere.text, len);
xwrite(pip[1], redir->nhere.text, len);
if (xwrite(comfd, buf, n) != n) {