Name
clearerr, feof, ferror, fileno — check and reset stream status
Synopsis
#include <stdio.h>
void
clearerr( |
FILE *stream); |
int
feof( |
FILE *stream); |
int
ferror( |
FILE *stream); |
int
fileno( |
FILE *stream); |
![[Note]](../stylesheet/note.png) |
Note | ||
|---|---|---|---|
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DESCRIPTION
The function clearerr()
clears the end-of-file and error indicators for the stream
pointed to by stream.
The function feof() tests
the end-of-file indicator for the stream pointed to by
stream, returning
nonzero if it is set. The end-of-file indicator can be
cleared only by the function clearerr().
The function ferror() tests
the error indicator for the stream pointed to by stream, returning nonzero if it
is set. The error indicator can be reset only by the
clearerr() function.
The function fileno()
examines the argument stream and returns its integer
file descriptor.
For nonlocking counterparts, see unlocked_stdio(3).
ERRORS
These functions should not fail and do not set the
external variable errno.
(However, in case fileno()
detects that its argument is not a valid stream, it must
return −1 and set errno to
EBADF.)
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
|
|
Thread safety | MT-Safe |
CONFORMING TO
The functions clearerr(),
feof(), and ferror() conform to C89, C99, POSIX.1-2001,
and POSIX.1-2008.
The function fileno()
conforms to POSIX.1-2001 and POSIX.1-2008.
COLOPHON
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. %%%LICENSE_START(BSD_4_CLAUSE_UCB) Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. All advertising materials mentioning features or use of this software must display the following acknowledgement: This product includes software developed by the University of California, Berkeley and its contributors. 4. Neither the name of the University nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. %%%LICENSE_END (#)ferror.3 6.8 (Berkeley) 6/29/91 Converted for Linux, Mon Nov 29 14:24:40 1993, faithcs.unc.edu Added remark on EBADF for fileno, aeb, 2001-03-22 |