What is wrong?

[Mark A. Charette]

In article <9492 at smoke.BRL.MIL>, gwyn at smoke.BRL.MIL (Doug Gwyn ) writes:
> In article <2051 at ndsuvax.UUCP> numork at ndsuvax.UUCP (James Mork) writes:
>> -  a simple program like this, the file gets truncated after 25 or
>> -  26 bytes...    After 25 when I read the file back in, I just
>> -  get EOF (-1).  What is wrong?
>> 
> Sounds to me like a ^Z in a text stream is taken as an EOF indicator.
> I know CP/M had this misfeature; maybe PC-DOS does too.
> 
> You probably should have been using binary streams instead.
> I.e. fopen with mode "wb" or "rb".

PC/MS-DOS definately DOES have this misfeature. The "wb" / "rb" 'fix' as
suggested by Mr. Gwyn will solve the problem (I tested at home).

If a program does not have to access any files outside of it's own
requirements, the use of binary modes will save a lot of headaches for PC
programmers. In MS C, the default mode can be changes to binary, with the
resulting CR/LF translation problems and ^Z EOF marker 'fixed'.

-- 
Mark Charette             "People only like me when I'm dumb!", he said. 
Electronic Data Systems   "I like you a lot." was the reply.
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