xdr_buf_trim(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, you’re looking at xdr_buf_trim(9) from the Kernel API Manual 🫶 This is the little XDR helper that lops bytes off the end of a buffer, and yes it’s giving “short king” energy but make it kernel API 💅✨

💖 NAME 💖

xdr_buf_trim — “lop at most "len" bytes off the end of "buf"”. That’s the entire name-card, no cap. 🎀

✨ SYNOPSIS ✨

Here’s the exact signature, character for character, because we respect the code:

void xdr_buf_trim (struct xdr_buf *buf , unsigned int len );

🎀 ARGUMENTS 🎀

  • buf — the struct xdr_buf * that is literally “buf to be trimmed”. We trim this one, bestie. 💖
  • len — the number of bytes to reduce "buf" by. That’s the amount we’re trying to lop off. 🌸

🌸 DESCRIPTION 🌸

Trim an xdr_buf by the given number of bytes by fixing up the lengths. That’s the move. Lengths get fixed up, and that’s the trim.

Note that it’s possible that we’ll trim less than that amount if the xdr_buf is too small, or if (for instance) it’s all in the head and the parser has already read too far into it. So if the trim comes up short, don’t come for the function — that’s the documented situation, iykyk 😭💀

🦋 SEE ALSO 🦋

Kernel file ./net/sunrpc/xdr.c is on the guest list, plus these manual-page besties:

source/version: ./net/sunrpc · date: October 2026 · page: xdr_buf_trim(9) — mwah, go trim those buffers and have the best day, bestie 💖🎀🦋

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