tty_port_shutdown(9)

📦 version 7.3.1, in nixpkgs unstable

💅 tty_port_shutdown 💅

okay so this is tty_port_shutdown from the Kernel API Manual, and honestly? she's a little internal helper who does NOT get enough credit. let's get into it 🫶

✨ NAME ✨

tty_port_shutdown — the internal helper that shuts the device down. that's it, that's the whole job, and she does it beautifully ✨

🌸 SYNOPSIS 🌸

void tty_port_shutdown (struct tty_port *port , struct tty_struct *tty );

like, two arguments, void return, no drama. main character energy but make it minimalist 💅

🎀 ARGUMENTS 🎀

  • port — the tty port that's getting shut down. she's the one being closed out, bestie 😭
  • tty — the associated tty. the lil buddy that comes along with the port.

🦋 DESCRIPTION 🦋

okay so here's the lore 🫶 tty_port_shutdown is used by tty_port_hangup and tty_port_close — those two call on her when it's time to wrap things up.

her whole task? shut down the device if it was initialized. and — important note, no cap — consoles remain functioning, so don't come for the console, she's built different 👑

she also lowers DTR/RTS if the tty has HUPCL set (yes, that's a real flag, iykyk), and then she invokes:

port->ops->shutdown

which is basically the "go tell the ops it's over" step. iconic, honestly 🌈

🔥 SEE ALSO 🔥

Kernel file ./drivers/tty/tty_port.c — and the whole tty_port friend group, fr fr:

💖 cute sign-off time: this page lived in ./drivers/tty, stamped October 2026 in the Kernel API Manual, all under the name tty_port_shutdown(9). go off, queen 💅✨
📦 where this page comes from