4.3BSD - /usr/man/cat3/clearerr.0

FERROR(3S)                                                          FERROR(3S)


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

SYNOPSIS
       #include <stdio.h>

       feof(stream)
       FILE *stream;

       ferror(stream)
       FILE *stream

       clearerr(stream)
       FILE *stream

       fileno(stream)
       FILE *stream;

DESCRIPTION
       Feof  returns  non-zero  when  end  of  file is read on the named input
       stream, otherwise zero.  Unless cleared by  clearerr,  the  end-of-file
       indication lasts until the stream is closed.

       Ferror  returns  non-zero when an error has occurred reading or writing
       the named stream, otherwise zero.   Unless  cleared  by  clearerr,  the
       error indication lasts until the stream is closed.

       Clearerr  resets  the  error  and  end-of-file  indicators on the named
       stream.

       Fileno returns the integer file descriptor associated with the  stream,
       see open(2).

       Currently all of these functions are implemented as macros; they cannot
       be redeclared.

SEE ALSO
       fopen(3S), open(2)


4th Berkeley Distribution        May 14, 1986                       FERROR(3S)