PFRU_IOC_ACTIVATE(9)

💅 PFRU_IOC_ACTIVATE 💅

okay so bestie, we're in the Kernel API Manual today and the star of the show is PFRU_IOC_ACTIVATE — yes the whole page, the whole vibe, she's the main character 🎀

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✨ NAME ✨

PFRU_IOC_ACTIVATE — literally defined as _IOW(PFRUT_IOCTL_MAGIC, 0x03, unsigned int) 🦋 no cap, that's the whole signature, write it down.

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✨ SYNOPSIS ✨

PFRU_IOC_ACTIVATE

that's it. that's the synopsis. she's lowkey mysterious like that 💅

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✨ RETURN ✨

so like, what do you get back? here's the tea 🍓

• 0 — success ✨ slay, it worked, we love a happy ending
• -EINVAL — activate phase returns invalid result 😭 the activate phase gave back something invalid, not iconic of it

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✨ DESCRIPTION ✨

okay so the actual job: activate a previously staged capsule image 🧚

that's it. that's the whole desc. you staged a capsule image earlier (iykyk, see the SEE ALSO besties), and now you're hitting the button that makes it go live. no extra steps described, no secret lore — just activate the thing 🔥

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✨ SEE ALSO ✨

go read these next, fr fr 👑

Kernel file ./include/uapi/linux/pfrut.h, plus:

• PFRU_IOC_SET_REV(9)
• PFRU_IOC_STAGE(9)
• PFRU_IOC_STAGE_ACTIVATE(9)
• PFRU_IOC_QUERY_CAP(9)
• struct pfru_payload_hdr(9)
• struct pfru_update_cap_info(9)
• struct pfru_com_buf_info(9)
• struct pfru_updated_result(9)
• struct pfrt_log_data_info(9)
• struct pfrt_log_info(9)
• PFRT_LOG_IOC_SET_INFO(9)
• PFRT_LOG_IOC_GET_INFO(9)
• PFRT_LOG_IOC_GET_DATA_INFO(9)

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bestie reminder: the -EINVAL case is the activate phase returns invalid result one — that's the documented meaning, don't go inventing extra drama about it 🙈

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and that's the page!! 🌈 source path is ./include/uapi/linux and she's dated October 2026 — mwah, love that for her, bye bestie 🫶💖🎀⭐