pc_extract_long_fn
error = pc_extract_long_fn(pcp, lfn, epp, offset, &slotp->sl_bp);
error = pc_extract_long_fn(pcp, NULL, &ep, &offset,
error = pc_extract_long_fn(pcp, ld->d_name, epp, offset, bp);
extern int pc_extract_long_fn(struct pcnode *, char *,