wcsncat(3)

✨ NAME ✨

wcsncat — bestie, this one concatenates two wide-character strings 💖

---

📚 LIBRARY 📚

Standard C library (libc, link it with -lc) 🫶

---

🎀 SYNOPSIS 🎀

#include <wchar.h>

wchar_t *wcsncat(size_t n;
                 wchar_t *restrict dest,
                 const wchar_t src[restrict n],
                 size_t n);

---

💅 DESCRIPTION 💅

okay so. wcsncat() is literally the wide-character equivalent of strncat(3) — same energy, just wide chars instead of regular ones ✨

What it does: it copies at most n wide characters from the wide-character string pointed to by src onto the end of the wide-character string pointed to by dest, and then it adds a terminating null wide character (L'\0') so the whole thing is properly closed off. periodt. 💁‍♀️

⚠️ the strings may not overlap. fr fr. not even a little. don't try it.

😭 and here's the part where you (yes, you, the programmer) have to make sure there's room for at least wcslen(dest)+n+1 wide characters sitting at dest. that's on you bestie, the function is not gonna check for you. no cap.

---

🌈 RETURN VALUE 🌈

wcsncat() returns dest. that's it, that's the tea 🍓 (it hands you back your destination pointer so you can chain stuff, iconic behavior honestly 👑)

---

🦋 ATTRIBUTES 🦋

For the whole explanation of the terms used in this section, go peek at attributes(7) 📖

Here's the vibe check for wcsncat():

• Interface: wcsncat()
• Attribute: Thread safety
• Value: MT-Safe ✅

so yeah, it's thread safe, slay 💅

---

⭐ STANDARDS ⭐

C11, POSIX.1-2008. 💯

---

🌸 HISTORY 🌸

POSIX.1-2001, C99. it's been around, it's a classic, it ate 🎀

---

👀 SEE ALSO 👀

• strncat(3)
• wcscat(3)

---

and that's the whole page bestie!! 💖 this was pulled straight from the Linux man-pages 6.20, dated 2026-02-08 — go forth and concatenate (safely, with room for wcslen(dest)+n+1, i am begging you 😭🫶) ✨🦋🌸