Section: POSIX Programmer's Manual (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.
--- copy a fixed-size wide-character string, returning a pointer
to its end
wchar_t *wcpncpy(wchar_t restrict *ws1, const wchar_t *restrict ws2,
wchar_t *wcsncpy(wchar_t *restrict ws1, const wchar_t *restrict ws2,
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.1-2008 defers to the ISO C standard.
functions shall copy not more than
wide-character codes (wide-character codes that follow a null
wide-character code are not copied) from the array pointed to by
to the array pointed to by
If copying takes place between objects that overlap, the behavior is
If the array pointed to by
is a wide-character string that is shorter than
wide-character codes, null wide-character codes shall be appended to
the copy in the array pointed to by
wide-character codes in all are written.
If any null wide-character codes were written into the
function shall return the address of the first such null wide-character
code. Otherwise, it shall return
function shall return
No return values are reserved to indicate an error.
No errors are defined.
The following sections are informative.
If there is no null wide-character code in the first
wide-character codes of the array pointed to by
the result is not null-terminated.
The Base Definitions volume of POSIX.1-2008,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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
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