FERROR(3) | Library Functions Manual | FERROR(3) |
clearerr
, feof
,
ferror
, fileno
—
#include <stdio.h>
void
clearerr
(FILE
*stream);
int
feof
(FILE
*stream);
int
ferror
(FILE
*stream);
int
fileno
(FILE
*stream);
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.
clearerr
(),
feof
(), and ferror
() should
neither fail nor set the external variable errno.
However, the function fileno
() may fail and return -1
in case the argument stream is not associated with a
valid file descriptor. (In this case the NetBSD
implementation does not follow the optional POSIX recommendation to set the
errno variable to EBADF
.)
clearerr
(),
feof
(), and ferror
() conform
to ANSI X3.159-1989 (“ANSI C89”).
The function fileno
() conforms to
IEEE Std 1003.1-1990 (“POSIX.1”).
May 6, 2010 | NetBSD 9.2 |