The function fread() reads
nmemb items of data,
each size bytes long,
from the stream pointed to by stream, storing them at the
location given by ptr.
The function fwrite() writes
nmemb items of data,
each size bytes long,
to the stream pointed to by stream, obtaining them from the
location given by ptr.
On success, fread() and
fwrite() return the number of
items read or written. This number equals the number of bytes
transferred only when size is 1. If an error occurs,
or the end of the file is reached, the return value is a
short item count (or zero).
fread() does not distinguish
between end-of-file and error, and callers must use feof(3) and ferror(3) to determine
which occurred.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
This page is part of release 4.07 of the Linux man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
Copyright (c) 1990, 1991 The Regents of the University of California.
All rights reserved.
This code is derived from software contributed to Berkeley by
Chris Torek and the American National Standards Committee X3,
on Information Processing Systems.
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@(#)fread.3
6.6 (Berkeley) 6/29/91
Converted for Linux, Mon Nov 29 15:37:33 1993, faith@cs.unc.edu
Sun Feb 19 21:26:54 1995 by faith, return values
Modified Thu Apr 20 20:43:53 1995 by Jim Van Zandt <jrv@vanzandt.mv.com>
Modified Fri May 17 10:21:51 1996 by Martin Schulze <joey@infodrom.north.de>