1FPUTWS(3P) POSIX Programmer's Manual FPUTWS(3P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
12 fputws — put a wide-character string on a stream
13
15 #include <stdio.h>
16 #include <wchar.h>
17 int fputws(const wchar_t *restrict ws, FILE *restrict stream);
19
21 The functionality described on this reference page is aligned with the
22 ISO C standard. Any conflict between the requirements described here
23 and the ISO C standard is unintentional. This volume of POSIX.1‐2017
24 defers to the ISO C standard.
25 The fputws() function shall write a character string corresponding to
27 the (null-terminated) wide-character string pointed to by ws to the
28 stream pointed to by stream. No character corresponding to the termi‐
29 nating null wide-character code shall be written.
30 The last data modification and last file status change timestamps of
32 the file shall be marked for update between the successful execution of
33 fputws() and the next successful completion of a call to fflush() or
34 fclose() on the same stream or a call to exit() or abort().
35
37 Upon successful completion, fputws() shall return a non-negative num‐
38 ber. Otherwise, it shall return -1, set an error indicator for the
39 stream, and set errno to indicate the error.
40
42 Refer to fputwc().
43 The following sections are informative.
45
47 None.
48
50 The fputws() function does not append a <newline>.
51 This volume of POSIX.1‐2017 requires that successful completion simply
53 return a non-negative integer. There are at least three known different
54 implementation conventions for this requirement:
55 * Return a constant value.
57 * Return the last character written.
59 * Return the number of bytes written. Note that this implementation
61 convention cannot be adhered to for strings longer than {INT_MAX}
62 bytes as the value would not be representable in the return type of
63 the function. For backwards-compatibility, implementations can
64 return the number of bytes for strings of up to {INT_MAX} bytes,
65 and return {INT_MAX} for all longer strings.
66
68 None.
69
71 None.
72
74 Section 2.5, Standard I/O Streams, fopen()
75 The Base Definitions volume of POSIX.1‐2017, <stdio.h>, <wchar.h>
77
79 Portions of this text are reprinted and reproduced in electronic form
80 from IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
81 table Operating System Interface (POSIX), The Open Group Base Specifi‐
82 cations Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of
83 Electrical and Electronics Engineers, Inc and The Open Group. In the
84 event of any discrepancy between this version and the original IEEE and
85 The Open Group Standard, the original IEEE and The Open Group Standard
86 is the referee document. The original Standard can be obtained online
87 at http://www.opengroup.org/unix/online.html .
88 Any typographical or formatting errors that appear in this page are
90 most likely to have been introduced during the conversion of the source
91 files to man page format. To report such errors, see https://www.ker‐
92 nel.org/doc/man-pages/reporting_bugs.html .
93IEEE/The Open Group 2017 FPUTWS(3P)