DB 1.86 Patches
                                      
    1. Problem: DB 1.86 compiles on IRIX, but fails to pass the tests. 
       
   A UNIX mailbox with the patches to make DB version 1.86 run on current
   IRIX systems. [INLINE]
    2. Problem: DB 1.86 compiles on Linux but fails to load, displaying
       an error message that there's no lorder command.
       
   Apply the following patch to the Linux Makefile. [INLINE]
*** Makefile.orig       Wed Jul 13 21:43:16 1994
--- Makefile    Wed Dec 31 19:00:00 1969
***************
*** 15,22 ****

  ${LIBDB}: ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC}
        rm -f $@
!       ar cq $@ \
!           `lorder ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC} | tsort`
        ranlib $@

  clean:
--- 15,21 ----

  ${LIBDB}: ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC}
        rm -f $@
!       ar cq $@ ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC}
        ranlib $@

  clean:
    3. Problem: DB 1.86 core dumps on certain data sets when using the
       B+tree access method. 
       
   Apply the following patch to the db-1.86/btree/bt_split.c file.
   [INLINE]
*** btree/bt_split.c.orig       Sat Feb  8 10:14:10 1997
--- btree/bt_split.c    Sat Feb  8 10:14:51 1997
***************
*** 673,679 ****
                 * where we decide to try and copy too much onto the left page.
                 * Make sure that doesn't happen.
                 */
!               if (skip <= off && used + nbytes >= full || nxt == top - 1) {
                        --off;
                        break;
                }
--- 673,680 ----
                 * where we decide to try and copy too much onto the left page.
                 * Make sure that doesn't happen.
                 */
!               if (skip <= off &&
!                   used + nbytes + sizeof(indx_t) >= full || nxt == top - 1) {
                        --off;
                        break;
                }
***************
*** 686,692 ****
                        memmove((char *)l + l->upper, src, nbytes);
                }

!               used += nbytes;
                if (used >= half) {
                        if (!isbigkey || bigkeycnt == 3)
                                break;
--- 687,693 ----
                        memmove((char *)l + l->upper, src, nbytes);
                }

!               used += nbytes + sizeof(indx_t);
                if (used >= half) {
                        if (!isbigkey || bigkeycnt == 3)
                                break;
    4. Problem: The metadata page for DB 1.86 B+tree databases is not
       correctly maintained in some circumstances. 
       
   Apply the following patch to the db-1.86/btree/bt_page.c file.
   [INLINE]
*** btree/bt_page.c.orig        Wed Jul 13 21:29:02 1994
--- btree/bt_page.c     Wed Jun 11 20:14:43 1997
***************
*** 65,70 ****
--- 65,71 ----
        h->prevpg = P_INVALID;
        h->nextpg = t->bt_free;
        t->bt_free = h->pgno;
+       F_SET(t, B_METADIRTY);

        /* Make sure the page gets written back. */
        return (mpool_put(t->bt_mp, h, MPOOL_DIRTY));
***************
*** 92,97 ****
--- 93,99 ----
            (h = mpool_get(t->bt_mp, t->bt_free, 0)) != NULL) {
                *npg = t->bt_free;
                t->bt_free = h->nextpg;
+               F_SET(t, B_METADIRTY);
                return (h);
        }
        return (mpool_new(t->bt_mp, npg));