DB_PAGE_NOTFOUND given when do db_dump

Question

Hi.
I'm going to do some development on my Motolora E680i cellphone which has a linux on it. I crosscompile BDB4.5.20NC and run db_dump to see the database on my cellphone. But when I type db_dump -p native.db, an error reported:
#db_dump: DBcursor->get: DB_PAGE_NOTFOUND: Requested page not found
I copied the native.db to my windows computer, and used windows version db_dump, all infomation was given normally.
When I try to use Db::open to open one of the databases in the native.db file on my cellphone, the same error message is given. So who can tell me what's happend?

Answer 1

here's the codes, I will try the DB_INIT_LOCK
int CEmsDoc::ConnectDB()
int ret = RET_OK;
m_pdb = new Db( NULL, DB_CXX_NO_EXCEPTIONS );
if( NULL == m_pdb )
TRACELOG("new Db failed");
goto CLEANUP;
if ( m_pErrFile )
m_pdb->set_error_stream( m_pErrFile );
ret = m_pdb->open( NULL, "/ezxlocal/sysDatabase/native.db", "ems_table_in_flash", DB_UNKNOWN, DB_RDONLY, 0);
if ( ret )
TRACE( "db open faild at line %i in %s" );
goto CLEANUP;
ret = m_pdb->cursor( NULL, &m_pdbcCursor, DB_TXN_SNAPSHOT );
if ( ret )
TRACE( "cursor failed at line %i in %s" );
goto CLEANUP;
CLEANUP:
if ( ret )
DisConnectDB();
return ret;
and I have tried this:
m_pDbEnv = new DbEnv( DB_CXX_NO_EXCEPTIONS );
m_pDbEnv->open( ""/ezxlocal/sysDatabase", DB_INIT_CDB|DB_INIT_MPOOL, 0 );
m_pdb->open( m_pDbEnv, native.db", "ems_table_in_flash", DB_UNKNOWN, DB_RDONLY, 0);
It returns No such file or dirctory when open DBEnv, but I'm sure the path and filename and the dbname are right.
BTW, am I right to cross compile bdb like this:
first I add this at the begining of dist/configure
#my crosscompiler named arm-linux-...
CC=arm-linux-gcc
CXX=arm-linux-g++
AR=arm-linux-ar
RANLIB=arm-linux-ranlib
STRIP=arm-linux-strip
then under build_unix:
../dist/configure host=arm-linux perfix=/opt/bdb --enable-cxx
make
make install
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