v4l2_ctrl_s_ctrl_string(9)

📦 version 7.3.1, in nixpkgs unstable

💅 v4l2_ctrl_s_ctrl_string(9) — from the Kernel API Manual, bestie 🎀

okay so picture this: you're deep in kernel-land, you've got a control, and it's a string control, and you just wanna set it. That's literally it. That's the whole vibe of this function. Welcome to the group chat ✨

✨ NAME ✨

v4l2_ctrl_s_ctrl_string — a lil helper function that sets a control's string value from inside a driver. lowkey iconic of it 🫶

🦋 SYNOPSIS 🦋

int v4l2_ctrl_s_ctrl_string (struct v4l2_ctrl *ctrl , const char *s );

🌸 ARGUMENTS 🌸

  • ctrl — the control. yes, that control. the main character 👑
  • s — the new string. the fresh content. the glow-up text 🎀

💖 DESCRIPTION 💖

So what does it do? It sets the control's new string safely, by going through the control framework like a civilized person instead of just yolo-ing bytes into memory. Respect the framework, and the framework respects you 💅

⚠️ Heads up bestie: this function will lock the control's handler. Which means — and this is the important part — it cannot be used from within the v4l2_ctrl_ops functions. Like, do not. It's giving deadlock. It's giving "why is my kernel frozen." Just don't 🙈

Also, PSA: this function is for string type controls only. String controls. Only. That's the whole niche. Don't come at it with an int, it's not gonna slay 💀

🔥 SEE ALSO 🔥

the whole extended friend group, fr fr:

that's the whole page bestie, go forth and set your strings safely 💜

this lil masterpiece lives in ./include/media and it's stamped October 2026 — so yes, it's from the future, and yes, it's still slaying. catch you in the next manpage 🌈✨

📦 where this page comes from