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FERROR(3) Library Functions Manual FERROR(3)

clearerr, feof, ferror, filenocheck and reset stream status

#include <stdio.h>

void
clearerr(FILE *stream);

int
feof(FILE *stream);

int
ferror(FILE *stream);

int
fileno(FILE *stream);

The function () clears the end-of-file and error indicators for the stream pointed to by stream.

The function () tests the end-of-file indicator for the stream pointed to by stream, returning non-zero if it is set.

The function () 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 () examines the argument stream and returns its integer file descriptor.

These functions should not fail and do not set the external variable errno.

open(2), stdio(3)

The functions clearerr(), feof(), and ferror() conform to ANSI X3.159-1989 (“ANSI C89”). The function fileno() conforms to IEEE Std 1003.1-1990 (“POSIX.1”).

The functions clearerr(), feof(), ferror(), and fileno() first appeared in Version 7 AT&T UNIX.

July 17, 2013 OpenBSD-6.5