libnvmf_read_key(9)

💅 libnvmf_read_key — the libnvme API manual, bestie edition

okay so picture this: we're deep in the libnvme API manual, and this lil function is the one that goes and actually gets your key data for you. iconic behavior honestly 🎀

---

✨ NAME ✨

libnvmf_read_key — read key raw data 🔑

like. it reads the raw data of a key. that's the whole vibe. no notes. periodt.

---

✨ SYNOPSIS ✨

int libnvmf_read_key (struct libnvme_global_ctx *ctx , long keyring_id ,
long key_id , int *len , unsigned char **key );

she takes five args and returns an int, and yes you have to get them all right, no cap 😭

---

✨ ARGUMENTS ✨

• ctx — a struct libnvme_global_ctx object, aka the whole context of the situation (literally).
• keyring_id — the id of the keyring that's holding key_id. she's the one keeping your key safe fr fr 🫶
• key_id — the key id. that's it. that's the whole thing.
• len — the length of the key to return. bestie gotta know how much to expect 💖
• key — the raw key data to return. this is where the actual goods land ✨

---

✨ DESCRIPTION ✨

so here's what she does 🌸 — libnvmf_read_key links the keyring specified by keyring_id into the session keyring, and then reads the payload of the key specified by key_id. that's the whole main character move.

and len holds the size of the returned buffer, so you always know exactly how much data you're working with. iykyk 💅

one little detail that is SO important: if keyring_id is 0, the default keyring '.nvme' is used. like a little fallback bestie who's always there for you 🦋

---

✨ RETURN ✨

• 0 on success 🎉 — slay, it worked
• a negative error code otherwise 😭 — go check what went wrong, diva

ngl, always check that return value. a negative number is not the vibe you want.

---

k so that's the whole page, no crumbs left behind 🍓 this is the libnvmf_read_key(9) page from the libnvme API manual, dated October 2026 — mwah, go forth and read those keys, queen 👑💜