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From: "Kai Henningsen" <kai AT cats DOT ms>
Organization: Spuentrup CTI
To: Kai Henningsen <kai AT cats DOT ms>,
        Bernard Dautrevaux <DAUTREVAUX AT microprocess DOT com>,
        cygwin AT sourceware DOT cygnus DOT com, earnie_boyd AT yahoo DOT com
Date: Fri, 22 Oct 1999 15:07:53 +0200
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Subject: RE: make, bash, or cygwin bug?
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On 22 Oct 99, at 5:42, Earnie Boyd wrote:

> --- Kai Henningsen <kai AT cats DOT ms> wrote:
> > On 12 Oct 99, at 7:28, Earnie Boyd wrote:
> > 
> > > The problem with this is, if a ^Z|C-z|Ctrl-Z is read then a superfluous
> > > END-OF-FILE is indicated. :-(
> > 
> > This should really not be done, unless it's input from a terminal.
> > Nearly all Win textfiles do NOT end in ^Z anyway. This convention
> > is extremely obsolete.
> 
> I wasn't suggesting ending a text file with a ^Z, I was refering to processing
> binary data which could contain a ^Z causing a premature end of file.  It isn't
> so obsolete that it doesn't cause the fuctions to flag an end-of-file.

Well yes, and I was suggesting that this is a bad idea - maybe 
even an outright bug.  

There are two conditions under which ^Z processing makes sense:  

1. While reading from a terminal (incidentally, the only situation 
where Unix processes ^D)  

2. When handling a text file, *AND* the ^Z in question is the very 
last byte of the file - except that even this case is very rare, and not 
really worth the bother.   

In all other situations, a ^Z should not be associated with EOF. 
(And ^D should only be associated with EOF in case 1.)  



Regards - Kai Henningsen

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