led_blink_set_oneshot(9)

📦 version 7.3.1, in nixpkgs unstable

Okay bestie, so this one is a kernel API manual page, led_blink_set_oneshot(9), and it's genuinely the cutest little function — it makes an LED do exactly one blink and then chill. Let's get into it 💅

🌸 SYNOPSIS 🌸

void led_blink_set_oneshot (struct led_classdev *led_cdev , unsigned
long *delay_on , unsigned long *delay_off , int invert );

Yup, that's the whole signature — no return value, it just does the thing. Periodt.

🎀 ARGUMENTS 🎀

  • led_cdev — the LED you wanna start blinking. Your main character, fr.
  • delay_on — the time it should be on, in ms. Like how long the glow-up lasts ✨
  • delay_off — the time it should ble off, in ms. (Yes, the original says "ble" — we're keeping that typo, it's iconic and we don't gatekeep. 😭) Basically how long the lil' guy naps.
  • invert — blink off, then on, leaving the led on. The chaotic order. Love that for you.

🦋 DESCRIPTION 🦋

So here's the tea: this function makes the LED blink one time for delay_on + delay_off time. One blink, that's it, no encore. 🎤

And listen — if another one-shot blink is already in progress, this request just gets ignored. Not me showing up late to the party 🙈. It literally ignores it. No queuing, no nothing.

If invert is set, the led blinks for delay_off first, then for delay_on, and it leaves the led on after the on-off cycle. So the order gets flipped and you end up glowing at the end. Slay 💖

And the best part? This function is guaranteed not to sleep. No cap. It does not sleep. Ever. So you can call it from places where sleeping is not allowed — that's the whole vibe check it passes 🔥

👑 SEE ALSO 👑

Go read these, bestie, they're all in the Kernel file ./include/linux/leds.h:

Okay that's the whole page, mwah 🫶. It lives in ./include/linux, and this lil' slice of kernel lore dropped in October 2026. Bye bestie, go blink something once 💜🎀

📦 where this page comes from