wmi_string_to_utf8s(9)

💅 wmi_string_to_utf8s(9) — Kernel API Manual, bestie edition ✨

okay so welcome to the Kernel API Manual page for wmi_string_to_utf8s(9) — yes that (9) means it's a kernel thing, we're in the big leagues now 🎀 grab a snack and let's get into it.

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🌸 NAME 🌸

wmi_string_to_utf8s — literally just convert a WMI string into a UTF8 string. that's the whole job. it's giving translator energy 🦋

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✨ SYNOPSIS ✨

ssize_t wmi_string_to_utf8s (const struct wmi_string *str , u8 *dst ,
       size_t length );

look at that signature, she's iconic, she returns an ssize_t and everything 👑

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🫶 ARGUMENTS 🫶

• str — the WMI string representation, aka the thing you're converting from. this is our main character 🎀
• dst — the buffer to fill with UTF8 characters. this is where the magic lands, so make sure it's real and it's big enough, no cap 💖
• length — length of the destination buffer. bestie please actually pass the real size, this is not the vibe to guess at 😭

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💜 DESCRIPTION 💜

so the whole deal is: convert a WMI string into a standard UTF8 string. easy. slay.

the conversion stops the second it detects a NUL character — like, we're done here, bye 🙈 — or when the buffer is full, whichever hits first.

any invalid UTF16 characters get ignored. they simply do not get an invite to the party 💅

and here's the cute part: the resulting UTF8 string will always be NUL-terminated when this function returns successfully. always. periodt. 🌟

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🔥 RETURN 🔥

• length of the resulting UTF8 string — that's the good ending 🎉
• or a negative errno code on failure — that's the "something went wrong" ending, and yeah, it's negative so keep an eye out 💀

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/platform/wmi/string.c — go read the source, iykyk 📖
• wmi_string_from_utf8s(9) — the other direction, the remix, the sequel 🌈

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and that's the page!! this lil page lives under ./drivers/platform/wmi, dated October 2026, and it's literally called wmi_string_to_utf8s(9) — go forth and convert those strings bestie, you're gonna ate 💖✨🎀🫶