blkerror
void blkerror(fsck_ino_t, caddr_t, daddr32_t, daddr32_t);
blkerror(idesc->id_number, "OUT OF RANGE",
blkerror(idesc->id_number, "DUP", fragno, lbn);
blkerror(idesc->id_number, "DUP", blkno, lbn);