59 lines
1.2 KiB
Groff
59 lines
1.2 KiB
Groff
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.\" Copyright (c) 1980 Regents of the University of California.
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.\" All rights reserved. The Berkeley software License Agreement
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.\" specifies the terms and conditions for redistribution.
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.\"
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.\" @(#)ferror.3s 6.3 (Berkeley) 5/14/86
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.\"
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.TH FERROR 3 "May 14, 1986"
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.UC 4
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.SH NAME
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ferror, feof, clearerr, fileno \- stream status inquiries
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.SH SYNOPSIS
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.nf
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.ft B
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#include <stdio.h>
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int feof(FILE *\fIstream\fP)
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int ferror(FILE *\fIstream\fP)
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int clearerr(FILE *\fIstream\fP)
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int fileno(FILE *\fIstream\fP)
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.ft R
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.fi
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.SH DESCRIPTION
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.B Feof
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returns non-zero when end of file is read on the named input
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.IR stream ,
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otherwise zero.
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Unless cleared by
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.BR clearerr ,
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the end-of-file indication lasts until
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the stream is closed.
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.PP
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.B Ferror
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returns non-zero when an error has occurred reading or writing
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the named
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.IR stream ,
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otherwise zero.
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Unless cleared by
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.BR clearerr ,
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the error indication lasts until
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the stream is closed.
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.PP
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.B Clearerr
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resets the error and end-of-file indicators on the named
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.IR stream .
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.PP
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.B Fileno
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returns the integer file descriptor
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associated with the
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.IR stream ,
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see
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.BR open (2).
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.PP
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Currently all of these functions
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are implemented as macros;
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they cannot be redeclared.
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.SH "SEE ALSO"
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.BR fopen (3),
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.BR open (2).
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