parport_claim(9)

📦 version 7.3.1, in nixpkgs unstable

💖 parport_claim(9) — bestie edition 🎀

okay so you wanna know about parport_claim(9)? it's a Kernel API Manual page, and honestly? it's kind of a whole vibe. sit down, grab a strawberry drink 🍓, and let's get into it.

✨ NAME ✨

parport_claim — claim access to a parallel port device 👑

like, you're literally calling dibs on the port. main character energy fr fr.

🌸 SYNOPSIS 🌸

int parport_claim (struct pardevice *dev );

that's it. one argument, returns an int. slay.

🦋 ARGUMENTS 🦋

  • dev — pointer to structure representing a device on the port. it's giving "here's my ID, let me in" 🙈

💅 DESCRIPTION 💅

okay so the big thing, the headline, the moment we've all been waiting for: this function will not block, and that means you can use it from interrupt context. no waiting around, no "hold on lemme finish this", it just goes. iconic behavior honestly ✨

If parport_claim succeeds in claiming access to the port it returns zero, and the port is available to use. zero = you got the port, go off, use it 💖

It may fail (returning non-zero) if the port is in use by another driver and that driver is not willing to relinquish control of the port. like, the port's taken and the other driver is NOT giving it up. rude, but valid 💀

lowkey important: non-zero return = you did not get the port. don't just assume you did, bestie 😭

🔥 SEE ALSO 🔥

Kernel file ./drivers/parport/share.c — that's where the magic lives, iykyk 🌈

🎀 the sign-off 🎀

this whole page lives under ./drivers/parport, and it's dated October 2026 — so yes, the parallel port lore is still being written, periodt. go read the friends listed above, they're all in the group chat 🫶💜

mwah 💋 go claim that port bestie, you got this ⭐🌸

📦 where this page comes from