According to dbopen(3), the 'type' field of struct DB holds the "type of
the underlying access method (and file format)." In __bt_open() it is set
to DB_BTREE and in __hash_open() it is set to DB_HASH, so one might expect
that in __rec_open() it is set to DB_RECNO. However, it is left untouched.
Index: rec_open.c
===================================================================
RCS file: /cvs/src/lib/libc/db/recno/rec_open.c,v
retrieving revision 1.13
diff -u -p -u -r1.13 rec_open.c
--- rec_open.c 21 Sep 2016 04:38:56 -0000 1.13
+++ rec_open.c 1 Dec 2020 13:01:37 -0000
@@ -154,6 +154,7 @@ slow: if ((t->bt_rfp = fdopen(rfd, "r"
dbp->put = __rec_put;
dbp->seq = __rec_seq;
dbp->sync = __rec_sync;
+ dbp->type = DB_RECNO;
/* If the root page was created, reset the flags. */
if ((h = mpool_get(t->bt_mp, P_ROOT, 0)) == NULL)
--
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