snd_ctl_rename_id(9)

📦 version 7.3.1, in nixpkgs unstable

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

okay so this is a page about snd_ctl_rename_id, straight out of the Kernel API Manual, and it's literally the glow-up function for control IDs on your sound card. let me tell you everything 🎀

✨ NAME ✨

snd_ctl_rename_id — replace the id of a control on the card

like, you've got a control, it has an id, and you want a different id. that's the whole vibe. 💫

🌸 SYNOPSIS 🌸

int snd_ctl_rename_id (struct snd_card *card , struct snd_ctl_elem_id
*src_id , struct snd_ctl_elem_id *dst_id );

it returns an int, it takes a card and two ids, and yes the parameters are aligned exactly like that, don't come for me 😭

🦋 ARGUMENTS 🦋

  • card — the card instance 💳 (the sound card we're operating on, bestie)
  • src_id — the old id 👵 the one we're swapping out
  • dst_id — the new id 👑 the one it's becoming, main character energy fr fr

💖 DESCRIPTION 💖

So here's the tea: it finds the control with the old id from the card, and replaces the id with the new one. that's it, that's the function. slay. ✨

The function tries to keep the already assigned numid while replacing the rest. so the numid stays iconic and unchanged, everything else gets the makeover. 🫶

⚠️ okay this part is IMPORTANT, no cap: this function should be used only in the card initialization phase. Calling it after the card instantiation may cause issues with userspace expecting persistent numids. like, userspace is out here trusting that numid to stay put, so don't betray it after init. 💀

⭐ RETURN ⭐

Zero if successful 🎉 — or a negative error code on failure 😭 (so like, check it, bestie, don't just assume it ate).

🌈 SEE ALSO 🌈

Kernel file ./sound/core/control.c — and honestly the whole control.c friend group showed up, so here they all are:

and that's the whole page, bestie! 🧚 sign-off time: this one lives in ./sound/core and the date on it is October 2026 — so it's giving futuristic kernel lore 🔥 go rename those ids responsibly (during init only!!) 💜🎀

📦 where this page comes from