allocbuf
BUF *allocbuf(BUF *, int, int);
if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) {
if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
allocbuf(bp, (int)lp->d_secsize, 1);
allocbuf(bp, bcount);
if (allocbuf(bp, size, preserve)) {
error = allocbuf(bp, size, 0);
int allocbuf(buf_t *, int, int);
allocbuf(bp, nsize, 1);
allocbuf(bp, nsize, 1);
allocbuf(*bpp, nsize, 1);
allocbuf(bp, size, 1);