This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       The fputws() function does not append a <newline>.

       This volume of POSIX.1‐2017 requires that successful completion simply  return  a  non-negative  integer.
       There are at least three known different implementation conventions for this requirement:

        *  Return a constant value.

        *  Return the last character written.

        *  Return the number of bytes written. Note that this implementation convention cannot be adhered to for
           strings longer than {INT_MAX} bytes as the value would not be representable in the return type of the
           function.  For backwards-compatibility, implementations can return the number of bytes for strings of
           up to {INT_MAX} bytes, and return {INT_MAX} for all longer strings.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 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 .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                        FPUTWS(3POSIX)

       The  functionality  described  on  this  reference  page is aligned with the ISO C standard. Any conflict
       between the requirements described  here  and  the  ISO C  standard  is  unintentional.  This  volume  of
       POSIX.1‐2017 defers to the ISO C standard.

       The  fputws()  function  shall  write  a  character  string  corresponding to the (null-terminated) wide-
       character string pointed to by ws to the stream pointed to by stream.  No character corresponding to  the
       terminating null wide-character code shall be written.

       The  last data modification and last file status change timestamps of the file shall be marked for update
       between the successful execution of fputws() and the next successful completion of a call to fflush()  or
       fclose() on the same stream or a call to exit() or abort().

       Refer to fputwc().

       Thefollowingsectionsareinformative.

       None.

       None.

       fputws — put a wide-character string on a stream

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

       None.

       Upon  successful  completion, fputws() shall return a non-negative number. Otherwise, it shall return -1,
       set an error indicator for the stream, and set errno to indicate the error.

Section2.5, StandardI/OStreams, fopen()

       The Base Definitions volume of POSIX.1‐2017, <stdio.h>, <wchar.h>

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

       int fputws(const wchar_t *restrict ws, FILE *restrict stream);