nvme_set_fe...ost_behavior(2)

✨ nvme_set_features_host_behavior — bestie edition ✨

okay so this is a page out of the libnvme API manual, section 2, and it's all about the li'l function nvme_set_features_host_behavior. Sit down, grab a strawberry 🍓, we're doing feature bits today.

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🌸 NAME 🌸

nvme_set_features_host_behavior — literally just, set the host behavior feature. That's the whole gig. It's giving "one job, and it does it". 💅

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🌈 SYNOPSIS 🌈

int nvme_set_features_host_behavior (int fd , bool save , struct
nvme_feat_host_behavior *data );

Three things go in, one int comes out, and she slays every time. ✨

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🎀 ARGUMENTS 🎀

• fd — the file descriptor of your nvme device. This is the "hey bestie, which drive are we talking about" moment. You gotta hand her an open fd or she has nothing to talk to. 💜
• save — a bool, and the question she's asking is: "do we want this value saved across power states?" So like, true means it survives a power cycle, false means it lives in the moment. Main character energy either way, but only one of them is forever. 🦋
• data — a pointer to a struct nvme_feat_host_behavior. That's the actual payload, the whole vibe you're trying to set. Yes, it's a pointer, no, you can't just hand it a fresh one from the void, it needs to be a real struct you own. 🫶

ngl, if data is not pointing at something valid, that's on you and not on her. Just sayin'.

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💖 RETURN 💖

So here's what you get back: the nvme command status if a response was actually received — and yes queen, you can go look that status up in enum nvme_status_field to find out exactly what the device is trying to tell you. 🗣️

But if no response came back at all? Then you get -1, and errno gets set to explain the situation. So check your errno, bestie. Don't just stare at the -1 and cry. 😭 Check the errno, then cry if you need to.

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periodt. that's the whole page. No extra lore, no hidden flags, no secret side quests — every argument, every return path, all accounted for, no cap. 🔥

💖 cute sign-off time 💖 — this lil masterpiece lives in the libnvme API manual, and it was stamped July 2026. Go forth and set your host behavior feature, bestie. You got this. 👑🌈⭐💀🙈🧚💜