n_hdlc_tty_open(9)

💅 n_hdlc_tty_open(9) 💅

okay so this is a page straight out of the Kernel API Manual bestie, and it's about one very specific little function that lowkey runs the whole vibe check when you flip a tty over to the n_hdlc line discipline. it's short, it's sweet, it's giving "small function, big job" energy 🎀

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✨ NAME ✨

n_hdlc_tty_open — literally the function that gets called when the line discipline is changed to n_hdlc 🦋

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🌸 SYNOPSIS 🌸

int n_hdlc_tty_open (struct tty_struct *tty );

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💖 ARGUMENTS 💖

• tty — pointer to the tty info structure. that's the whole thing. one (1) argument. she's low maintenance like that 🫶

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👑 DESCRIPTION 👑

so here's the tea: this thing returns 0 if it succeeds, otherwise it hands you back an error code 😭 no cap, that's the entire description. iconic minimalism honestly.

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🌈 SEE ALSO 🌈

okay this is where it pops off, because the related-reading list is long and we're listing every single one fr fr:

• Kernel file ./drivers/tty/n_hdlc.c struct n_hdlc(9)
• n_hdlc_tty_close(9)
• n_hdlc_send_frames(9)
• n_hdlc_tty_write_work(9)
• n_hdlc_tty_wakeup(9)
• n_hdlc_tty_receive(9)
• n_hdlc_tty_read(9)
• n_hdlc_tty_write(9)
• n_hdlc_tty_ioctl(9)
• n_hdlc_tty_poll(9)
• n_hdlc_alloc(9)
• n_hdlc_buf_return(9)
• n_hdlc_buf_put(9)
• n_hdlc_buf_get(9)

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bestie this page is short enough that there's genuinely nothing to trip over 💀 but like, go read n_hdlc_tty_close(9) next so you get the full arc, iykyk ✨

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and that's the whole page, bestie 💜 source and version energy: this came out of ./drivers/tty and it's dated October 2026, filed under n_hdlc_tty_open(9) — go off, go read some kernel source, and slay your tty stack 🎀💅