seq_buf_bprintf(9)

✨ seq_buf_bprintf ✨

okay so this is a page from the Kernel API Manual and honestly? it's giving "speed demon energy" 💅 we're talking about seq_bprintf's bestie here, so let's get into it 🫶

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🌸 NAME 🌸

seq_buf_bprintf — write the printf string from binary arguments 🎀

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🦋 SYNOPSIS 🦋

int seq_buf_bprintf (struct seq_buf *s , const char *fmt , const u32 *binary );

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💖 ARGUMENTS 💖

• s — the seq_buf descriptor, aka the whole vibe container for your buffer ✨
• fmt — the format string for the binary arguments, iykyk 🌈
• binary — the binary arguments for fmt. literally the raw receipts of what got passed in 💀

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👑 DESCRIPTION 👑

okay so bestie, picture this: you're on a fast path and you need to record a printf. but converting all those arguments into ASCII characters? that's expensive, and honestly not the moment for it 😭

So instead — and this is the iconic part — the printf may be recorded with just saving the format and the arguments exactly as they were passed to the function. no wasted cycles on conversion, we're saving that for later ✨

Not me just saying: the arguments get saved in a 32 bit word array that is defined by the format string constraints. like, the format string tells you the shape of the array, and that's the whole bit 🎀

This function is the one that comes back later and finishes the job: it takes the format and the binary array, and completes the conversion into the ASCII string — inside the buffer, no cap 💅

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⭐ RETURN ⭐

• 0 on success — slay 🎉
• -1 on overflow — and that's your vibe check failing, sorry bestie 💀

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🌈 SEE ALSO 🌈

Kernel file ./lib/seq_buf.c and the whole squad: seq_buf_can_fit(9), seq_buf_print_seq(9), seq_buf_vprintf(9), seq_buf_printf(9), seq_buf_do_printk(9), seq_buf_puts(9), seq_buf_putc(9), seq_buf_putmem(9), seq_buf_putmem_hex(9), seq_buf_path(9), seq_buf_to_user(9), seq_buf_hex_dump(9) — a whole friend group fr fr 🦋

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💜 okay that's the whole page, go forth and buffer responsibly 🫶

kisses, this came from the ./lib crew 🌸 and it's dated October 2026 — signed, sealed, delivered by seq_buf_bprintf(9) itself ✨🎀