A question about open file

[a a]

Dear sir:
    I am a Chinese man.In RedHat8.0 whose kernel is
2.4.18 ,I compile Grub-0.95.It is Ok.Then I modify
stage2/stage2.c.In cmain function,before 
is_opened = is_present = open_present_menu(),I add
some code.In my added code,I use grub_open function to
open a file.Then I compile and install GRUB.
    If this file exists,GRUB runs successfully and a
graphical menu appears.But if this file does not
exist,the graphical menu does not appeared,it appeared
a cmdline interface.I am confused.I want to ask you to
get some help.
    Thanks.
                                          huangtao
                                          Mar 11th

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