Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!uflorida!gatech!udel!mmdf
From: Leisner.Henr@xerox.com (marty)
Newsgroups: comp.os.minix
Subject: Re: fopen: "r" |/& "rb"? (was Re: utility to find strings in a
Message-ID: <9198@louie.udel.EDU>
Date: 20 Feb 89 14:47:57 GMT
Sender: mmdf@udel.EDU
Lines: 34

in article <659@mks.UUCP>, wheels@mks.UUCP (Gerry Wheeler) says:
>> 		fopen(argv[arg], "rb")
> 
> This prevents DOS from returning EOF when it reads a ^Z character.

When doing handle I/O, I don't think the cntl-Z character is used (read
works with file sizes).

I'm now running the Minix stdio routines on Ms/Dos.   I added to FILE a
flag for binary mode  (to go along with the "*b" option in fopen) -- at the
end of getc.c I have:

        /* filter out returns */
        if(result == '\r' && !testflag(iop, BINMODE))
                return getc(iop);
        else    return result;

In putc.c, I have:

        if(ch == '\n' && !testflag(iop, BINMODE))
                putc('\r', iop);        /* ms/dos patch ? */
		

The fact that the C library needs to do the filtering is a real pain.

If the application is processing binary data through the stdio library, the
ANSI way of doing it requires the "b" mode.


marty
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