seq_show_option_n(9)

📦 version 7.3.1, in nixpkgs unstable

💅 seq_show_option_n(9) — from the Kernel API Manual, bestie ✨

okay so real talk, this one lives in the Kernel API Manual and it's a macro that prints mount options with the right escapes — but only when @value is a specific length, aka NOT NUL-terminated. yes that's the whole personality. let's get into it 🎀

✨ NAME ✨

seq_show_option_n — display mount options with appropriate escapes where @value must be a specific length (i.e. not NUL-terminated). no cap, that's literally the job 🫶

🌸 SYNOPSIS 🌸

seq_show_option_n (m , name , value , length );

🦋 ARGUMENTS 🦋

  • m — the seq_file handle 💖
  • name — the mount option name
  • value — the mount option name's value, and it cannot be NULL 🚫
  • length — the exact length of value to display, and it must be constant expression ⭐

👑 DESCRIPTION 👑

so here's the tea: this is a macro 🧚 because it uses "length" to define the size of the stack buffer. that's the whole reason it's not a function, bestie — the length has to be baked in at compile time. iconic behavior honestly 🔥

🌈 SEE ALSO 🌈

Kernel file ./include/linux/seq_file.h plus the whole friend group:

💀 lowkey reminder: value cannot be NULL, and length must be a constant expression. don't try her with a runtime variable, she will NOT be nice about it 😭

and that's the page!! mwah 💋 this cutie comes to you from ./include/linux, dated October 2026 — go forth and escape your mount options correctly, ily, bye bestie 🍓🦋💜

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