centos man page for fwide

FWIDE(3P)						     POSIX Programmer's Manual							 FWIDE(3P)

PROLOG
       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
       fwide - set stream orientation

SYNOPSIS
       #include <stdio.h>
       #include <wchar.h>

       int fwide(FILE *stream, int mode);

DESCRIPTION
       The fwide() function shall determine the orientation of the stream pointed to by stream. If mode is greater than zero, the  function  first
       attempts to make the stream wide-oriented.  If mode is less than zero, the function first attempts to make the stream byte-oriented. Other-
       wise, mode is zero and the function does not alter the orientation of the stream.

       If the orientation of the stream has already been determined, fwide() shall not change it.

       Since no return value is reserved to indicate an error, an application wishing to check for error situations should set errno  to  0,  then
       call fwide(), then check errno, and if it is non-zero, assume an error has occurred.

RETURN VALUE
       The  fwide() function shall return a value greater than zero if, after the call, the stream has wide-orientation, a value less than zero if
       the stream has byte-orientation, or zero if the stream has no orientation.

ERRORS
       The fwide() function may fail if:

       EBADF  The stream argument is not a valid stream.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       A call to fwide() with mode set to zero can be used to determine the current orientation of a stream.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       The Base Definitions volume of IEEE Std 1003.1-2001, <wchar.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and  the  original  IEEE
       and  The  Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								 FWIDE(3P)