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Date: Sun, 5 Dec 2004 17:17:46 +0100 (MET)
From: =?iso-8859-1?Q?Peter_=C5strand?= <astrand AT lysator DOT liu DOT se>
To: cygwin AT cygwin DOT com
Subject: short fread(), but no ferror/feof
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I've discovered that fread(ptr, size, nitems, stream) sometimes returns a
value less than "nitems", but does not set feof() nor ferror(). As I
understand, this is incorrect: All fread() documentation I've found
confirms this. For example, IEEE Std 1003.1 says:

"Upon successful completion, fread() shall return the number of elements
successfully read which is less than nitems only if a read error or
end-of-file is encountered."

I've only noticed the problem when using fread() on a pipe, and when
setting a (another) file descriptor in the same application in
close-on-exec mode. The details are on http://python.org/sf/1071516. I've
been using the latest Cygwin (as of 2004-12-04) on Windows 98.

To me, this looks like a Cygwin bug. Any ideas?

/Peter Åstrand <astrand AT lysator DOT liu DOT se>


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