.\" Copyright (c) 1980 Regents of the University of California.

.\" All rights reserved. The Berkeley software License Agreement

.\" specifies the terms and conditions for redistribution.

.\"

.\" @(#)ferror.3s 6.3 (Berkeley) 5/14/86

.\"

.TH FERROR 3 "May 14, 1986"

.UC 4

.SH NAME

ferror, feof, clearerr, fileno \- stream status inquiries

.SH SYNOPSIS

.nf

.ft B

#include <stdio.h>

int feof(FILE *\fIstream\fP)

int ferror(FILE *\fIstream\fP)

int clearerr(FILE *\fIstream\fP)

int fileno(FILE *\fIstream\fP)

.ft R

.fi

.SH DESCRIPTION

.B Feof

returns non-zero when end of file is read on the named input

.IR stream ,

otherwise zero.

Unless cleared by

.BR clearerr ,

the end-of-file indication lasts until

the stream is closed.

.PP

.B Ferror

returns non-zero when an error has occurred reading or writing

the named

.IR stream ,

otherwise zero.

Unless cleared by

.BR clearerr ,

the error indication lasts until

the stream is closed.

.PP

.B Clearerr

resets the error and end-of-file indicators on the named

.IR stream .

.PP

.B Fileno

returns the integer file descriptor

associated with the

.IR stream ,

see

.BR open (2).

.PP

Currently all of these functions

are implemented as macros;

they cannot be redeclared.

.SH "SEE ALSO"

.BR fopen (3),

.BR open (2).