FERROR(3)                 OpenBSD 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 indi-
     cator 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 inte-
     ger file descriptor.

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

SEE ALSO
     open(2),  stdio(3)

STANDARDS
     The functions clearerr(), feof(), and ferror() conform to ANSI
     X3.159-1989 (``ANSI C''). The function fileno() conforms to IEEE
     Std1003.1-1990 (``POSIX'').

OpenBSD 2.6                     April 19, 1994                               1