ubi_check_pattern(9)

✨ ubi_check_pattern(9) ✨

okay so bestie, welcome to the Kernel API Manual entry for ubi_check_pattern(9) — this is a little UBI helper and honestly? it's giving "small but mighty" 💅

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🌸 NAME 🌸

ubi_check_pattern — check if buffer contains only a certain byte pattern.

like, does this whole chunk of memory contain just one repeated byte and nothing else? that's the entire vibe check 🦋

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⭐ SYNOPSIS ⭐

int ubi_check_pattern (const void *buf , uint8_t patt , int size );

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🎀 ARGUMENTS 🎀

• buf — buffer to check. this is the memory you're snooping on 👀
• patt — the pattern to check. the byte you're looking for, over and over.
• size — buffer size in bytes. how far down the buffer we're looking, fr fr.

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💖 DESCRIPTION 💖

This function returns 1 in there are only patt bytes in buf, and 0 if something else was also found.

so real talk: all patt and nothing but patt? → 1 🎉 anything else sneaking in there too? → 0 💀 no cap, that's the whole function. iconic behavior honestly.

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🫶 SEE ALSO 🫶

Kernel file ./drivers/mtd/ubi/misc.c and its besties:

• ubi_calc_data_len(9)
• ubi_check_volume(9)
• ubi_update_reserved(9)
• ubi_calculate_reserved(9)

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okay that's the whole page bestie, go forth and check those patterns 💜

this absolute gem lives over in ./drivers/mtd/ubi, dated October 2026 — and that's the cute lil sign-off, mwah 🍓✨