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wcsstr(3) — Linux manual page

wcsstr(3)                Library Functions Manualwcsstr(3)

NAME        top

       wcsstr - locate a substring in a wide-character string

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <wchar.h>wchar_t *wcsstr(const wchar_t *haystack, const wchar_t *needle);

DESCRIPTION        top

       Thewcsstr() function is the wide-character equivalent of thestrstr(3) function.  It searches for the first occurrence of the       wide-character stringneedle (without its terminating null wide       character (L'\0')) as a substring in the wide-character stringhaystack.

RETURN VALUE        top

       Thewcsstr() function returns a pointer to the first occurrence ofneedle inhaystack.  It returns NULL ifneedle does not occur as a       substring inhaystack.       Note the special case: Ifneedle is the empty wide-character       string, the return value is alwayshaystack itself.

ATTRIBUTES        top

       For an explanation of the terms used in this section, seeattributes(7).       ┌──────────────────────────────────────┬───────────────┬─────────┐       │Interface│Attribute│Value│       ├──────────────────────────────────────┼───────────────┼─────────┤       │wcsstr()                             │ Thread safety │ MT-Safe │       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS        top

       C11, POSIX.1-2008.

HISTORY        top

       POSIX.1-2001, C99.

SEE ALSO        top

strstr(3),wcschr(3)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17wcsstr(3)

Pages that refer to this page:strstr(3), wcschr(3), signal-safety(7)

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