FERROR(3) BSD Programmer's Manual FERROR(3)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);
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 point-
ed to by stream, returning non-zero if it is set. The end-of-file indica-
tor can only be cleared by the function clearerr().
The function ferror() tests the error indicator for the stream pointed to
by stream, returning non-zero if it is set. The error indicator can only
be reset by the clearerr() function.
The function fileno() examines the argument stream and returns its in-
teger file descriptor.
ERRORS
These functions should not fail and do not set the external variable
errno.
SEE ALSOopen(2), stdio(3)STANDARDS
The functions clearerr(), feof(), and ferror() conform to ANSI X3.159-
1989 ("ANSI C"). The function fileno() conforms to IEEE Std 1003.1-1990
("POSIX").
MirOS BSD #10-current April 19, 1994 1