dvb_ca_en50221_io_read(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dvb_ca_en50221_io_read(9) — like, the Kernel API Manual, bestie

okay so this is dvb_ca_en50221_io_read from the Kernel API Manual, and honestly? it's giving "one job, does it well." it's the implementation of the read() syscall for the DVB-CA EN50221 stuff. that's the whole vibe. no cap. 🎀

✨ SYNOPSIS ✨

ssize_t dvb_ca_en50221_io_read (struct file *file , char __user *buf ,
       size_t count , loff_t *ppos );

look at her. four params. immaculate. 🫶

🌸 ARGUMENTS 🌸

  • file — the file structure. yeah. the whole file. it's right there. 💅
  • buf — destination buffer, aka where the bytes are gonna live their best life. ✨
  • count — size of the destination buffer. so like, how much room buf actually has. don't overstay, queen. 🎀
  • ppos — position in file. and bestie… it's ignored. literally not even looked at. it's just there for the vibes. 🙈

💀 RETURN 💀

number of bytes read, or <0 on error. that's it. that's the whole return section. short and iconic. 👑

⭐ friendly reminder from your girl: if you get something <0, that's an error, not a personality trait. check it. fr fr.

🦋 SEE ALSO 🦋

the source lives in the kernel file ./drivers/media/dvb-core/dvb_ca_en50221.c, and here's the whole extended friend group — every single one of them, in order, no skips, because we don't do that here:

and that's the page!! 🧚💜 this lil gem lives under ./drivers/media/dvb-core and the manual page itself is dated October 2026 — so she's from the future, main character energy honestly. go read some tuples, bestie. iykyk. 🔥🌈⭐

📦 where this page comes from