Originální popis anglicky:
clearerr, feof, ferror, fileno - check and reset stream status
Návod, kniha: Linux Programmer's Manual
#include <stdio.h>
void clearerr(FILE *stream);
int feof(FILE *stream);
int ferror(FILE *stream);
int fileno(FILE *stream);
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 pointed
to by
stream, returning non-zero if it is set. The end-of-file
indicator 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
integer descriptor.
For non-locking counterparts, see
unlocked_stdio(3).
These functions should not fail and do not set the external variable
errno. (However, in case
fileno detects that its argument is not
a valid stream, it must return -1 and set
errno to
EBADF.)
The functions
clearerr,
feof, and
ferror conform to
X3.159-1989 (``ANSI C'').
open(2),
stdio(3),
unlocked_stdio(3)
