fill_random_string(9)

💅 fill_random_string(9) 💅

okay so bestie, welcome to the Kernel API Manual</> — yes that's the manual name, we're fancy here ✨

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🎀 NAME 🎀

fill_random_string — literally populates a buffer with a random NUL-terminated</> string. that's it. that's the whole job. and it ate 💅

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✨ SYNOPSIS ✨

void fill_random_string (char *buf , size_t len );

no cap, that's the whole signature. two args. nothing else. iconic behaviour honestly 🫶

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🌸 ARGUMENTS 🌸

• buf — the buffer you're filling up, bestie. this is the one getting the random glow-up 💖
• len — length of that buffer, in bytes. like, how much room it's got. count it right or it's giving chaos 😭

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🦋 DESCRIPTION 🦋

so what it does is — it fills the buffer with random non-NUL</> bytes, then makes sure the string is properly NUL-terminated</> at the end. so you get a nice little random string that's valid and terminated and ready to go. main character energy fr fr 👑

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🌈 SEE ALSO 🌈

• Kernel file ./lib/tests/string_kunit.c
• strscpy_check(9)
• alloc_max_bench_buffer(9)
• STRING_BENCH(9)
• STRING_BENCH_BUF(9)

go read those too, iykyk 🧚💜

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lowkey a reminder: this page lives in ./lib/tests, dated October 2026 — so yeah, that's the source and version, periodt 💀✨

stay random, stay terminated 💖🎀🦋🌸💅