dvb_ringbuff...kt_read_user(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dvb_ringbuff...kt_read_user(9)

okay bestie, welcome to the Kernel API Manual ✨ — yes this is a real function name and yes it's truncated with dots in the header, no we're not gonna fight about it 🎀

This one is dvb_ringbuffer_pkt_read_user, and it's literally here to read from a packet in the ringbuffer. That's the whole vibe. Let's get into it 💖

🌸 NAME 🌸

dvb_ringbuffer_pkt_read_user — Read from a packet in the ringbuffer.

That's it. That's the job. Read. From a packet. In the ringbuffer. Periodt 🫶

✨ SYNOPSIS ✨

ssize_t dvb_ringbuffer_pkt_read_user (struct dvb_ringbuffer *rbuf ,
size_t idx , int offset , u8 __user *buf , size_t len );

Look at her. Five args. Returns a ssize_t. Iconic signature ngl 👑

🦋 ARGUMENTS 🦋

  • rbuf — Ringbuffer concerned. Like, the one you're actually messing with, bestie.
  • idx — Packet index, exactly as returned by dvb_ringbuffer_pkt_next. Don't make one up, fr fr 🙈
  • offset — Offset into the packet you wanna read from. Start wherever, we don't judge.
  • buf — Destination buffer for the data. This is where the good stuff lands 🎀
  • len — Size of the destination buffer. Keep it honest, okay?

💀 RETURN 💀

Number of bytes read, or -EFAULT. That's the whole deal — either you get your byte count or you get the error, no in-between energy 💅

🌈 DESCRIPTION 🌈

So here's the tea, and it's important tea:

NOTE: unlike dvb_ringbuffer_read, this does NOT update the read pointer in the ringbuffer. You must use dvb_ringbuffer_pkt_dispose to mark a packet as no longer required.

Read that again. dvb_ringbuffer_read moves the read pointer. This one does not. It just… reads. It's giving "look but don't touch" main character energy 😭 So when you're actually done with a packet, you have to call dvb_ringbuffer_pkt_dispose to say "okay this packet can go now." Don't skip that step, bestie, I'm begging 🙏

🔥 SEE ALSO 🔥

Kernel file ./include/media/dvb_ringbuffer.h — go read the header, it's the whole family tree 🌳

okay that's the whole page, you ate that 💖 this little cutie lives in ./include/media, it's dated October 2026, and the header on the tin says dvb_ringbuff...kt_read_user(9) — yes with the dots, it's a whole aesthetic 🎀 go read some packets, bestie, and remember to dispose them 🌸🦋✨

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