wcsstr(3) Library Functions Manual wcsstr(3) wcsstr - (libc -lc) #include wchar_t *wcsstr(const wchar_t *haystack, const wchar_t *needle); wcsstr() strstr(3). needle ( (L'\0')) haystack. wcsstr() needle haystack. NULL needle haystack. : needle haystack . attributes(7). +------------+------------------------------------+--------------------+ || | | +------------+------------------------------------+--------------------+ |wcsstr() | | MT-Safe | +------------+------------------------------------+--------------------+ C11, POSIX.1-2008. POSIX.1-2001 C99. strstr(3), wcschr(3) 3 . . : . 6.18 8 2026 wcsstr(3)