Index: src/btree.c
==================================================================
--- src/btree.c
+++ src/btree.c
@@ -7,11 +7,11 @@
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btree.c,v 1.357 2007/04/24 17:27:51 drh Exp $
+** $Id: btree.c,v 1.358 2007/04/24 17:35:59 drh Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** For a detailed discussion of BTrees, refer to
 **
 **     Donald E. Knuth, THE ART OF COMPUTER PROGRAMMING, Volume 3:
@@ -2786,10 +2786,13 @@
 
   if( pBt->pPage1==0 ){
     rc = lockBtreeWithRetry(p);
     if( rc!=SQLITE_OK ){
       return rc;
+    }
+    if( pBt->readOnly && wrFlag ){
+      return SQLITE_READONLY;
     }
   }
   pCur = sqliteMalloc( sizeof(*pCur) );
   if( pCur==0 ){
     rc = SQLITE_NOMEM;