parport_write(9)

💖 parport_write(9) 💖

okay so welcome to the Kernel API Manual, bestie — this is the page for parport_write(9) and it's literally the "send the bytes out the door" function 🎀

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✨ NAME ✨

parport_write — write a block of data to a parallel port 🦋

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🌸 SYNOPSIS 🌸

ssize_t parport_write (struct parport *port , const void *buffer ,
size_t len );

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🎀 ARGUMENTS 🎀

• port — the port you're writing to, iykyk 💅
• buffer — the data buffer (and bestie, this lives in kernel space, no cap)
• len — how many bytes of data you're transferring 🍓

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💜 DESCRIPTION 💜

so what this does is it writes up to len bytes of buffer to the port you specified, using whichever IEEE 1284 transfer mode was most recently negotiated to (that's the one you set up with parport_negotiate), as long as that mode supports forward transfers (host to peripheral). main character energy, but only if the mode actually allows it 🌈

⚠️ heads up: it is the caller's responsibility to ensure that the first len bytes of buffer are valid. nobody's gonna check that for you, that's on you fr fr 😭

as for the return value: this function returns the number of bytes transferred (if zero or positive), or else an error code. so positive or zero = slay, negative-ish error code = not slay 💀

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👑 SEE ALSO 👑

kernel file ./drivers/parport/ieee1284.c — go read it, it's iconic ⭐

• parport_wait_event(9)
• parport_poll_peripheral(9)
• parport_wait_peripheral(9)
• parport_negotiate(9)
• parport_read(9)
• parport_set_timeout(9)

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🫶 and that's the whole page! this one came from ./drivers/parport and it's dated October 2026 — go forth and transfer those bytes, bestie, I believe in you 💖✨🧚