is_continuation(9)

💅 is_continuation(9) — the multibyte check bestie

okay so this whole page lives in the Kernel API Manual, and the star of the show is is_continuation(9) — literally a tiny little multibyte check and honestly? she's iconic for how much she does with so little. ✨

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🌸 NAME 🌸

is_continuation — multibyte check 🎀

Like, that's it. That's the whole pitch. A check. For multibyte stuff. Slay.

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🦋 SYNOPSIS 🦋

int is_continuation (u8 c , const struct tty_struct *tty );

That's the whole signature, no cap — one int coming back at you, a u8 c going in, and a const struct tty_struct *tty riding along. 💖

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✨ ARGUMENTS ✨

• c — the byte you're checking 👀 just a lil byte, that's all she is
• tty — the terminal device, aka the whole vibe context for this check 🖥️

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🫶 RETURN 🫶

It returns true when both of these things are true, fr fr:

1. the utf8 character c is a multibyte continuation character, and
2. the terminal is in unicode mode 🌈

Like, both conditions or it's not giving. Periodt. 💅

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👑 SEE ALSO 👑

Okay bestie, buckle up, because this list is long and every single one of these is part of the family 🧚 — all of them live in the kernel file ./drivers/tty/n_tty.c:

• n_tty_kick_worker(9)
• n_tty_write_wakeup(9)
• put_tty_queue(9)
• reset_buffer_flags(9)
• n_tty_flush_buffer(9)
• is_utf8_continuation(9)
• do_output_char(9)
• process_output(9)
• process_output_block(9)
• __process_echoes(9)
• add_echo_byte(9)
• echo_move_back_col(9)
• echo_set_canon_col(9)
• echo_erase_tab(9)
• echo_char_raw(9)
• echo_char(9)
• finish_erasing(9)
• eraser(9)
• isig(9)
• n_tty_receive_break(9)
• n_tty_receive_overrun(9)
• n_tty_receive_parity_error(9)
• n_tty_receive_char_flow_ctrl(9)
• n_tty_receive_char(9)
• n_tty_receive_buf_common(9)
• n_tty_set_termios(9)
• n_tty_close(9)
• n_tty_open(9)
• copy_from_read_buf(9)
• canon_copy_from_read_buf(9)
• job_control(9)
• n_tty_read(9)
• n_tty_write(9)
• n_tty_poll(9)
• n_tty_inherit_ops(9)

iykyk 🔥 that's a whole friend group right there.

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💡 friendly reminder: the kernel file reference is ./drivers/tty/n_tty.c and the man page source dir is ./drivers/tty — write those down, bestie, you'll want them.

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and that's the page!! 🌸 coming at you from ./drivers/tty, dated October 2026, signed off as is_continuation(9) — go check those continuation characters, ily, bye 💜🦋