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.
For wcsncpy(): 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.
The wcpncpy() and wcsncpy() functions shall copy not more than n
wide-character codes (wide-character codes that follow a null wide-
character code are not copied) from the array pointed to by ws2 to
the array pointed to by ws1. If copying takes place between objects
that overlap, the behavior is undefined.
If the array pointed to by ws2 is a wide-character string that is
shorter than n wide-character codes, null wide-character codes shall
be appended to the copy in the array pointed to by ws1, until n wide-
character codes in all are written.
If any null wide-character codes were written into the destination,
the wcpncpy() function shall return the address of the first such
null wide-character code. Otherwise, it shall return &ws1[n].
The wcsncpy() function shall return ws1.
No return values are reserved to indicate an error.
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 http://www.unix.org/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
IEEE/The Open Group 2013 WCSNCPY(3P)