wcsncat(3) Library Functions Manual wcsncat(3) NAME wcsncat - concatenate two wide-character strings LIBRARY Standard C library (libc, -lc) SYNOPSIS #include wchar_t *wcsncat(size_t n; wchar_t *restrict dest, const wchar_t src[restrict n], size_t n); DESCRIPTION The wcsncat() function is the wide-character equivalent of the strncat(3) function. It copies at most n wide characters from the wide-character string pointed to by src to the end of the wide-character string pointed to by dest, and adds a terminating null wide character (L'\0'). The strings may not overlap. The programmer must ensure that there is room for at least wcslen(dest)+n+1 wide characters at dest. RETURN VALUE wcsncat() returns dest. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). allbox; lbx lb lb l l l. Interface Attribute Value T{ wcsncat() T} Thread safety MT-Safe STANDARDS C11, POSIX.1-2008. HISTORY POSIX.1-2001, C99. SEE ALSO strncat(3), wcscat(3) Linux man-pages 6.18 2026-02-08 wcsncat(3)