gsasl_callback_set(3)

📦
version 2.2.4 · 6 versions
, in arch rolling, ubuntu stonking

💖 gsasl_callback_set(3) — the gsasl manual, bestie edition 💖

okay so real talk, this page lives in the gsasl manual. Yeah, gsasl — the GNU SASL library. We're doing the callback-setter one. Buckle up, it's short but it's important. 🎀

✨ NAME ✨

gsasl_callback_set — it's an API function, bestie. That's the whole name. Slay. 💅

🌸 SYNOPSIS 🌸

the vibe, in code form:

#include <gsasl.h>

void gsasl_callback_set(Gsasl * ctx, Gsasl_callback_function cb);

that's it. two lines of include-and-declare. iconic. ✨

🦋 ARGUMENTS 🦋

  • Gsasl * ctx — the handle you got back from gsasl_init(). like, the context. you gotta have one, you can't just walk in here with nothing. 🫶
  • Gsasl_callback_function cb — a pointer to a function that your application implements. not gsasl's job, not mine, yours. main character energy, honestly. 👑

💜 DESCRIPTION 💜

So what does this actually do? It stores that pointer — the application-provided callback — inside the library handle. That's it. That's the function. But the why is the good part:

That callback gets used, via gsasl_callback(), by the mechanisms. And what are the mechanisms doing with it? They're going on a little scavenger hunt for various parameters — stuff like usernames and passwords, y'know, the essentials. 🔍

The callback function will be called with a Gsasl_property value, and that value is telling you which behaviour is being requested. So it's not a mystery call, it's a labeled call. very demure, very mindful. 🌈

Here's the example, and I need you to focus because this is the whole concept in one move — for GSASL_ANONYMOUS_TOKEN, the function is expected to invoke this:

gsasl_property_set( CTX ,
                    GSASL_ANONYMOUS_TOKEN,
                    "token")

where "token" is the anonymous token your application wants the SASL mechanism to use. See? The mechanism asks, your callback answers. It's giving ✨communication✨. 💖

And for the meaning of all the parameters — every single one, not just the token one — go read the manual. this page is a vibe, the manual is the lore. 📖

⭐ SINCE ⭐

0.2.0 — she's been around a minute. an OG. no cap. 👑

🐛 REPORTING BUGS 🐛

Found a bug? Do NOT suffer in silence, bestie, that's not the move. 😭

tell them everything. they want to help you. periodt. 💌

Copyright © 2002-2026 Simon Josefsson.

Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

like, go off, share it, remix it — just keep the receipts attached. that's the deal and it's a good deal. 🫶

🔥 SEE ALSO 🔥

The full documentation for gsasl is maintained as a Texinfo manual. If the info and gsasl programs are properly installed at your site, this command:

info gsasl

should give you access to the complete manual. like, the whole thing. the director's cut. 🎬

As an alternative, you may obtain the manual from:

https://www.gnu.org/software/libidn/gsasl/manual/

either way you're covered. iykyk. 🌟

Lowkey the whole takeaway: you hand gsasl a function, gsasl calls that function later with a Gsasl_property, and your function sets the value it's being asked for. simple. elegant. obsessed. 💅

this page came to you from the gsasl manual, version 2.2.4, and it's gsasl_callback_set(3) forever and always. mwah, go write that callback bestie 💋🌈✨

📦 where this page comes from