FPUTWS(3)                  POSIX Programmer's Manual                 FPUTWS(3)



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

NAME
       fputws -- put a wide-character string on a stream

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

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

DESCRIPTION
       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().

RETURN VALUE
       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.

ERRORS
       Refer to fputwc().

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       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.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       Section 2.5, Standard I/O Streams, fopen()

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

COPYRIGHT
       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(3)
