watchdog_ioctl(9)

📦 version 7.3.1, in nixpkgs unstable

💖 watchdog_ioctl(9) — Kernel API Manual, bestie edition 💖

okay so this is watchdog_ioctl(9), straight out of the Kernel API Manual, and it's literally the little function that handles all the ioctl's for the watchdog device 🐶✨ no cap.

✨ NAME ✨

watchdog_ioctl — handle the different ioctl's for the watchdog device 🎀

🌸 SYNOPSIS 🌸

long watchdog_ioctl (struct file *file , unsigned int cmd , unsigned
long arg );

like… look at her. she's returning a long, she's taking three args, she's iconic 💅

🦋 ARGUMENTS 🦋

  • file — File handle to the device. this is your golden ticket into the watchdog, the whole "which device are we even talking about" of it all 🫶
  • cmd — Watchdog command. the actual order you're barking at the watchdog, the what are we doing 😭
  • arg — Argument pointer. the extra lil' something that comes with the command — a pointer, bestie, okurrr 👑

💜 DESCRIPTION 💜

so the watchdog API defines a common set of functions for all watchdogs, according to their available features. that's the whole vibe — one shared API shape, and each watchdog brings whatever features it actually has to the table 🌈⭐

🔥 RETURN 🔥

0 if successful, error otherwise. that's it. zero means slay, anything else means something went sideways 💀

🧚 SEE ALSO 🧚

Kernel file ./drivers/watchdog/watchdog_dev.c plus her whole friend group:

okay that's the whole page, go read the source bestie, ./drivers/watchdog/watchdog_dev.c is right there 🙈

and that's a wrap, angel 💖 this one's living in ./drivers/watchdog and it's dated October 2026 — the source/version and date, delivered with love. periodt. 🎀✨🍓

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