DB 1.85 Patches

  1. Problem: DB 1.85 compiles on IRIX, but fails to pass the tests.
    2. A UNIX mailbox with the patches to make DB version 1.85 (or 1.86) run on current IRIX systems.  

  2. Problem: DB 1.85 core dumps on certain data sets when using the B+tree access method.
    3. Apply the following patch to the db-1.85/btree/bt_split.c file.   
    *** btree/bt_split.c	Tue Jul 26 14:22:02 1994
--- btree/bt_split.c	Sat Jan  4 14:38:55 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) {
  			--off;
  			break;
  		}
--- 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;
  		}

  3. Problem: DB 1.85 compiles on Linux but fails to load, displaying an error message that there's no lorder command.
    4. Apply the following patch to the Linux Makefile.   
    *** 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:

  4. Problem: DB 1.85 core dumps on certain data sets when using the B+tree access method. (Patch #2 MUST be applied before this patch.)
    5. Apply the following patch to the db-1.85/btree/bt_split.c file.   
    *** 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;

  5. Problem: The metadata page for DB 1.85 B+tree databases is not correctly maintained in some circumstances.
    6. Apply the following patch to the db-1.85/btree/bt_page.c file.   
    *** 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));