NAME    [Toc]    [Back]

       clearerr, feof, ferror, fileno - check and reset stream status

SYNOPSIS    [Toc]    [Back]

       #include <stdio.h>

       void clearerr( FILE *stream);
       int feof( FILE *stream);
       int ferror( FILE *stream);
       int fileno( FILE *stream);

DESCRIPTION    [Toc]    [Back]

       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.

ERRORS    [Toc]    [Back]

       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.)

CONFORMING TO    [Toc]    [Back]

       The functions clearerr, feof, and ferror conform to X3.159-1989 (``ANSI
       C'').

SEE ALSO    [Toc]    [Back]

       open(2), stdio(3)



BSD MANPAGE			  2001-03-22			     FERROR(3)