DOPOWERHOOKS(9)

💅 DOPOWERHOOKS 💅

okay so bestie, welcome to DOPOWERHOOKS(9) — that's section 9 of the Kernel Developer's Manual, aka the deep-magic zone where the kernel girlies hang out. this one's a little vintage, a little deprecated, but she still ate and we're gonna learn her. 🎀

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✨ NAME ✨

dopowerhooks — run all power hooks, like, all of them, no cap 🔥

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🦋 SYNOPSIS 🦋

void
dopowerhooks(int why);

that's it. one function, one int, zero drama. she's simple. she's iconic. she's... deprecated (more on that in a sec, don't panic 😭).

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🌸 DESCRIPTION 🌸

⚠️ BIG WARNING FIRST, BESTIE: the dopowerhooks routine is deprecated. like, officially. use pmf_system_suspend(9) instead. we love an upgrade arc 💅✨

okay so what does she actually do? the dopowerhooks() function invokes all power hooks established using the powerhook_establish(9) function. every single one. she's a social butterfly, she's inviting the whole group chat.

here's the tea on the ordering, and it's giving chaotic-but-makes-sense:

• when power is disappearing, the power hooks are called in reverse order — i.e., the power hook established last will be called first. last in, first out, main character energy 👑
• when power is restored, they are called in normal order. back to business as usual, slay 🌈

and where does she get called from? this function is called from the apm(4) driver when a power change is detected. so like, if your machine notices the power situation shifting, apm(4) picks up the phone and rings dopowerhooks(). 📞✨

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👀 SEE ALSO 👀

• powerhook_establish(9) — the one who actually sets up the hooks she runs, iykyk 🫶

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⭐ sign-off ⭐

this lil page comes to you from Debian, dated February 11, 2010 — yeah she's a throwback, a vintage queen, and her manual page name is DOPOWERHOOKS(9) in case you forgot already 💖. go forth and use pmf_system_suspend(9) bestie, ily, bye! 🧚💜