WRITER mode of gdbm

[Oleg Goodyckov]

Hi!

I try to use gdbm. But I have some trouble.
When I have not created db "t.db", for example, and want to open it in
WRITER mode, I want to get error and db_open have to fail. This is written
in man and info for gdbm.
But when I issue command 

      db = gdbm_open("t.db",0,GDBM_WRITER,0,0);

new databse "t.db" is creating. I have not found mode of opening, when
gdbm_open fails while opening database is not exists. So, how can I reach
such effect?

Thanx!

Oleg.