Index: rpm/rpmdb/db3.c
RCS File: /v/rpm/cvs/rpm/rpmdb/db3.c,v
rcsdiff -q -kk '-r1.71' '-r1.72' -u '/v/rpm/cvs/rpm/rpmdb/db3.c,v' 2>/dev/null
--- db3.c	2007/08/18 23:40:36	1.71
+++ db3.c	2007/09/24 02:38:57	1.72
@@ -275,12 +275,21 @@
 		fileSystem @*/
 	/*@modifies dbi, *dbenvp, fileSystem @*/
 {
+    static int oneshot = 0;
     rpmdb rpmdb = dbi->dbi_rpmdb;
     DB_ENV *dbenv = NULL;
     int eflags;
     int rc;
     int xx;
 
+    if (!oneshot) {
+#if (DB_VERSION_MAJOR == 3 && DB_VERSION_MINOR != 0) || (DB_VERSION_MAJOR == 4)
+	xx = db_env_set_func_open(Open);
+	xx = cvtdberr(dbi, "db_env_set_func_open", xx, _debug);
+#endif
+	oneshot++;
+    }
+
     if (dbenvp == NULL)
 	return 1;
 
Index: rpm/rpmdb/rpmdb.c
RCS File: /v/rpm/cvs/rpm/rpmdb/rpmdb.c,v
rcsdiff -q -kk '-r1.158' '-r1.159' -u '/v/rpm/cvs/rpm/rpmdb/rpmdb.c,v' 2>/dev/null
--- rpmdb.c	2007/09/09 19:06:51	1.158
+++ rpmdb.c	2007/09/24 02:38:57	1.159
@@ -3618,8 +3618,9 @@
     if (db == NULL) return 0;
 
     mi = rpmdbInitIterator(db, RPMTAG_BASENAMES, NULL, 0);
-    if (mi == NULL)	/* XXX should  never happen */
-	return 0;
+assert(mi);	/* XXX will never happen. */
+    if (mi == NULL)
+	return 2;
 
 key = &mi->mi_key;
 data = &mi->mi_data;
Index: rpm/rpmio/librpmio.vers
RCS File: /v/rpm/cvs/rpm/rpmio/librpmio.vers,v
rcsdiff -q -kk '-r2.12' '-r2.13' -u '/v/rpm/cvs/rpm/rpmio/librpmio.vers,v' 2>/dev/null
--- librpmio.vers	2007/09/09 20:32:43	2.12
+++ librpmio.vers	2007/09/24 02:38:57	2.13
@@ -140,6 +140,8 @@
     _Mknod;
     Mount;
     noLibio;
+    Open;
+    _Open;
     Opendir;
     _Opendir;
     pgpArmorKeyTbl;
Index: rpm/rpmio/rpmio.h
RCS File: /v/rpm/cvs/rpm/rpmio/rpmio.h,v
rcsdiff -q -kk '-r1.57' '-r1.58' -u '/v/rpm/cvs/rpm/rpmio/rpmio.h,v' 2>/dev/null
--- rpmio.h	2007/08/28 20:45:49	1.57
+++ rpmio.h	2007/09/24 02:38:57	1.58
@@ -342,11 +342,22 @@
 	/*@globals errno, h_errno, fileSystem, internalState @*/
 	/*@modifies errno, fileSystem, internalState @*/;
 
+/*@unchecked@*/ /*@observer@*/ /*@null@*/
+extern const char * _chroot_prefix;
+
 /**
  * chroot(2) clone.
  * @todo Implement remotely.
  */
 int Chroot(const char * path)
+	/*@globals _chroot_prefix, errno, fileSystem, internalState @*/
+	/*@modifies _chroot_prefix, errno, fileSystem, internalState @*/;
+
+/**
+ * open(2) clone.
+ * @todo Implement remotely.
+ */
+int Open(const char * path, int flags, mode_t mode)
 	/*@globals errno, fileSystem, internalState @*/
 	/*@modifies errno, fileSystem, internalState @*/;
 
Index: rpm/rpmio/rpmrpc.c
RCS File: /v/rpm/cvs/rpm/rpmio/rpmrpc.c,v
rcsdiff -q -kk '-r2.54' '-r2.55' -u '/v/rpm/cvs/rpm/rpmio/rpmrpc.c,v' 2>/dev/null
--- rpmrpc.c	2007/07/10 18:00:30	2.54
+++ rpmrpc.c	2007/09/24 02:38:57	2.55
@@ -160,6 +160,9 @@
     return rmdir(path);
 }
 
+/*@unchecked@*/
+const char * _chroot_prefix = NULL;
+
 int Chroot(const char * path)
 {
     const char * lpath;
@@ -183,11 +186,56 @@
 	return -2;
 	/*@notreached@*/ break;
     }
+
+    _chroot_prefix = _free(_chroot_prefix);
+    if (strcmp(path, "."))
+	_chroot_prefix = rpmGetPath(path, NULL);
+
 /*@-superuser@*/
     return chroot(path);
 /*@=superuser@*/
 }
 
+int Open(const char * path, int flags, mode_t mode)
+{
+    const char * lpath;
+    int ut = urlPath(path, &lpath);
+
+if (_rpmio_debug)
+fprintf(stderr, "*** Open(%s, 0x%x, 0%o)\n", path, flags, mode);
+    switch (ut) {
+    case URL_IS_PATH:
+	path = lpath;
+	/*@fallthrough@*/
+    case URL_IS_UNKNOWN:
+	break;
+    case URL_IS_DASH:
+    case URL_IS_HKP:
+    case URL_IS_FTP:		/* XXX TODO: implement. */
+    case URL_IS_HTTPS:		/* XXX TODO: implement. */
+    case URL_IS_HTTP:		/* XXX TODO: implement. */
+    default:
+	errno = EINVAL;		/* XXX W2DO? */
+	return -2;
+	/*@notreached@*/ break;
+    }
+
+    if (_chroot_prefix && _chroot_prefix[0] == '/' && _chroot_prefix[1] != '\0')
+    {
+	size_t nb = strlen(_chroot_prefix);
+	size_t ob = strlen(path);
+	while (nb > 0 && _chroot_prefix[nb-1] == '/')
+	    nb--;
+	if (ob > nb && !strncmp(path, _chroot_prefix, nb) && path[nb] == '/')
+	    path += nb;
+    }
+#ifdef	NOTYET	/* XXX likely sane default. */
+    if (mode == 0)
+	mode = 0644;
+#endif
+    return open(path, flags, mode);
+}
+
 /* XXX rpmdb.c: analogue to rename(2). */
 
 int Rename (const char * oldpath, const char * newpath)