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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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FPUTWS(3P) POSIX Programmer's Manual FPUTWS(3P)
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.
fputws — put a wide-character string on a stream
#include <stdio.h>
#include <wchar.h>
int fputws(const wchar_t *restrict ws, FILE *restrict stream);
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().
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.
Refer to fputwc(3p).
The following sections are informative.
None.
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.
None.
None.
Section 2.5, Standard I/O Streams, fopen(3p)
The Base Definitions volume of POSIX.1‐2017, stdio.h(0p),
wchar.h(0p)
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(3P)
Pages that refer to this page: wchar.h(0p)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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