nvme_read_key(2)

💖 nvme_read_key — bestie edition 💖

okay so this is a page from the libnvme API manual, and today we're learning about nvme_read_key(2). it's giving "let me peek inside the keyring real quick" energy and honestly? iconic. 🎀

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✨ NAME ✨

nvme_read_key — read key raw data 🗝️✨

like literally, it reads the raw payload of a key. that's the whole vibe.

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🌸 SYNOPSIS 🌸

unsigned char * nvme_read_key (long keyring_id , long key_id , int *len );

bestie look at that signature. three things going in, one pointer coming out. slay. 💅

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🦋 ARGUMENTS 🦋

• keyring_id — the id of the keyring that's holding onto key_id. like, which lil keyring is this key even on?? 🔑
• key_id — the key id. that's the key we're talking about. the main character of this function, honestly. 👑
• len — the length of the returned data. it'll get filled in with the size of the buffer you get back. 📏

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💜 DESCRIPTION 💜

so here's the tea, fr fr. nvme_read_key links the keyring that you specified with keyring_id into the session keyring, and then it reads the payload of the key you specified with key_id. 🫶

and len? len holds the size of the returned buffer, so after the call you know exactly how much data you're working with. no guessing, no cap. ✨

🚨 important lil detail: if keyring is 0, the default keyring .nvme gets used instead. (yes, the argument is spelled keyring_id in the signature and keyring in the description — that's just how it is, bestie, don't come for me, I'm copying the facts exactly. 🙈)

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⭐ RETURN ⭐

on success, you get a pointer to the payload. 🎉

otherwise? you get NULL, and errno is set. so like, check your errno, bestie, it's literally telling you what went wrong. don't ignore it. 😭

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🌈 SEE ALSO 🌈

nothing else listed here — this one's a solo act, and honestly? main character energy. periodt. 💅

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so yeah, that's nvme_read_key(2) from the libnvme API manual, and this version is coming to you straight from July 2026. 🗓️✨ go read some keys, bestie, you've got this. mwah. 💖🧚🍓