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.
wcsstr — find a wide-character substring
wchar_t *wcsstr(const 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.1‐2017 defers to the ISO C standard.
The wcsstr() function shall locate the first occurrence in
the wide-character string pointed to by ws1 of the sequence of wide
characters (excluding the terminating null wide character) in the
wide-character string pointed to by ws2.
Upon successful completion, wcsstr() shall return a pointer to the
located wide-character string, or a null pointer if the wide-character string
is not found.
If ws2 points to a wide-character string with zero length,
the function shall return ws1.
No errors are defined.
The following sections are informative.
The Base Definitions volume of POSIX.1‐2017,
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 .
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