tty_lookup_driver(9)

📦 version 7.3.1, in nixpkgs unstable

💖 NAME 💖

okay so this is the tty_lookup_driver(9) page from the Kernel API Manual, and it's literally about one thing: lookup a tty driver for a given device file. that's the whole vibe bestie 💅

✨ SYNOPSIS ✨

struct tty_driver * tty_lookup_driver (dev_t device , struct file *filp
       , int *index );

🎀 ARGUMENTS 🎀

  • device — device number. yes, that's the device number right there 🫶
  • filp — file pointer to tty. the file pointer for the tty, no cap.
  • index — index for the device in the return driver. it tells you the device's index in the returned driver ✨

🌸 DESCRIPTION 🌸

If returned value is not erroneous, the caller is responsible to decrement the refcount by tty_driver_kref_put. so if the return value isn't an error, bestie, you gotta handle that refcount cleanup yourself — don't leave it hanging 😭

Locking: tty_mutex protects get_tty_driver. that's the lock tea, fr fr 🔒

🦋 RETURN 🦋

driver for this inode (with increased refcount). yep, it gives you the driver for this inode, and the refcount is increased — so handle it with care 👑

👑 SEE ALSO 👑

Kernel file ./drivers/tty/tty_io.c is in the mix too, and here's the whole SEE ALSO squad — every single one, because we do not skip the crew 🫶

cute little sign-off: source/version corner is ./drivers/tty, the date is October 2026, and this page is tty_lookup_driver(9). bye bestie, mwah 💋🫶

📦 where this page comes from