fseek64 failed

["yxy_oversea" <yxy_oversea@xxxxxxxxxxx>]

Dear friends:

    Thanks very much to answer my question of "why xfs not supported here".
Follow you words, I change my kernel to  2.4.0-4SGI_44, then I can use xfs 
filesystem and create files larger than 2.1G. So great, thanks!

    And now, I'm looking for some system calls which support large file I 
can use in c-programs. I use fopen64() success, but fseek64() fail, compile ok, 
execute result says fseek64() use "Invalid argument". I then tried that 
argument with fseek() and fseeko(), it succeed.

    My question is: 
        How can I use fseek64() successfully?
        Is there any call like lseek64() as that in IRIX?

    Thanks.