iio_chrdev_open(9)

📦 version 7.3.1, in nixpkgs unstable

💅 iio_chrdev_open(9) — the Kernel API Manual glow-up 🎀

okay bestie, so this one is from the Kernel API Manual, page name iio_chrdev_open(9), and honestly? it's a tiny little icon that does one job and does it flawlessly. it's giving gatekeeper energy, but make it kernel. 🔥

✨ NAME ✨

iio_chrdev_open — the chrdev file open for buffer access and ioctls 💖

like, literally, when someone opens your IIO character device file, this is the bouncer at the door. check the list, let 'em in, or say "sorry babes, busy." 🚪✨

🌸 SYNOPSIS 🌸

int iio_chrdev_open (struct inode *inode , struct file *filp );

no cap, that's the whole vibe. two args, one int back. clean. 🧚

🦋 ARGUMENTS 🦋

  • inode — the Inode structure, aka the little ID card that tells you which device in the file system we're even talking about. it's how we know who just walked in 👀🪪
  • filp — the File structure for the iio device, used to keep and later access private data. think of it as the purse we stash the secrets in so future-you can find them 👜💜

🌈 RETURN 🌈

  • 0 on success — slay, you're in 💅✨
  • -EBUSY if the device is already opened — nope, taken, occupied, main character is busy 😭🙈

👑 SEE ALSO 👑

bestie, the friend group is huge. huge huge. take a breath. 🫶

Kernel file ./drivers/iio/industrialio-core.c, plus:

literally the whole squad. iykyk. 🌸💀

oh and real talk: if the device is already opened you get -EBUSY and that's it — no drama, no undefined nonsense, just a polite no. 🎀

signing off from ./drivers/iio 🦋 — this one's dated October 2026 and it lives at iio_chrdev_open(9). periodt. 💜✨

📦 where this page comes from