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From: lenox@media-lab.MEDIA.MIT.EDU (Lenox H. Brassell)
Newsgroups: comp.os.os2.programmer
Subject: Re: Dectection of HPFS File system?
Summary: and better yet (no write access needed)
Message-ID: <4114@media-lab.MEDIA.MIT.EDU>
Date: 19 Nov 90 20:45:37 GMT
References: <15510005@hpspcoi.HP.COM> <11686@hubcap.clemson.edu> <4112@media-lab.MEDIA.MIT.EDU>
Organization: MIT Media Lab, Cambridge, MA
Lines: 27



This method is better yet: it does not require write access to the
device in order to work.  (It does require read access: I haven't
found any way around that!)  Just be sure that you mark the EXE header
of the program that uses this test to be "longfilename-aware":

    int IsFAT (char chDriveName)
    {
        char szFileSpec[] = "*:123456789";
        HDIR hdir = HDIR_CREATE;
        USHORT usAttribute = FILE_NORMAL;
        USHORT usSearchCount = 1;
        FILEFINDBUF findbuf;
        USHORT cbBuf;
        USHORT usCode;

        szFileSpec[0] = chDriveName;
        usCode = DosFindFirst (szFileSpec, 
            &hdir, usAttribute, &findbuf, (USHORT)sizeof(findbuf),
            &usSearchCount, 0L
            );
        if  (usCode == 0)
            DosFindClose (hdir);

        return usCode == ERROR_FILENAME_EXCED_RANGE;
    }