NAME    [Toc]    [Back]

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

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

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.

SEE ALSO    [Toc]    [Back]

     open(2), stdio(3)

STANDARDS    [Toc]    [Back]

     The functions clearerr(), feof(), and ferror() conform to ANSI
     X3.159-1989 (``ANSI C'').  The function fileno() conforms to ISO/IEC
     9945-1:1990 (``POSIX.1'').

BSD                             April 19, 1994                             BSD