pdcspath_layer_write(9)

📦 version 7.3.1, in nixpkgs unstable

💅 pdcspath_layer_write — the manual page, but make it make sense

okay so this is pdcspath_layer_write(9) from the Kernel API Manual — yes bestie, section 9, kernel API vibes only 🧚✨. It's the little function that handles extended layer modifying, and honestly? she's doing a lot with very little supervision (we'll get to that 😭).

✨ SYNOPSIS ✨

ssize_t pdcspath_layer_write (struct pdcspath_entry *entry , const char
*buf , size_t count );

like, look at her. three params, one ssize_t return, iconic behavior 👑

🎀 ARGUMENTS 🎀

  • entry — an allocated and populated pdscpath_entry struct. both, bestie. allocated and populated. don't come at her with a half-built struct, she will not be fixing that for you 🫶
  • buf — the input buffer to read from 📥 the actual tea goes here
  • count — the number of bytes to be read 🔢 yes, bytes. yes, exactly that many.

🌸 DESCRIPTION 🌸

so the whole point: we call this function to change the current layer value. that's the assignment. that's the gig 💅

layers are to be given '.'-delimited, without brackets. so like — dotted, no brackets, periodt. do not wrap them in brackets, do not pass go, do not collect $200 🎀

XXX ⚠️ okay so here's the part where I hold your hand: beware — we are far less checky WRT input data provided than for hwpath. far. less. checky. 😭 potential harm can genuinely be done here, because there's no way to check the validity of the layer fields. no validation. none. it's giving trust fall with no one to catch you 💀

so like, be normal about what you feed her, because she literally cannot verify it for you. not a skill issue, just how she's built 🙈

🔥 SEE ALSO 🔥

the whole friend group, fr fr — go read these too:

mwah 💖 that's the whole page. she lives in ./drivers/parisc, this printing is the October 2026 one, and the whole thing is filed under pdcspath_layer_write(9) in the Kernel API Manual. go forth and dot your layers, bestie 🌈⭐

📦 where this page comes from