errno.h(3avr)

📦
version 2.2.1 · 3 versions
, in debian trixie, ubuntu questing, ubuntu resolute, ubuntu stonking

💖 errno.h — the little header that's all up in your error business 💖

okay bestie, welcome to errno.h(3avr) — yes that's the manual page for the AVR-LibC header of the same name, and no it is NOT long, it's giving tiny-iconic-energy and we're gonna get through it together in like twelve seconds 🎀

✨ NAME ✨

errno.h — that's it, that's the name, she's a header file and she knows it 💅

🌸 SYNOPSIS 🌸

🧚 Macros

#define EDOM   33
#define ERANGE   34

🦋 Variables

int errno

👑 DESCRIPTION 👑 (the vibes, explained)

okay so here's the thing — errno.h is the home of that one global variable that every libc function gossips through when something goes wrong: errno, declared as int errno. when a function has a lil moment, it doesn't text you, it just sets errno and hopes you check it 🙈

and then you've got the two macros that live here, which are the classic "what kind of problem was it" codes:

  • EDOM — defined as 33. it's the "your argument was out of the domain, babe, that math doesn't exist" code 🍓
  • ERANGE — defined as 34. it's the "your result was out of range, it overflowed/underflowed, we can't hold all that" code 😭

that's the whole header. no cap. two macros and a variable, and yet the entire error-handling ecosystem of your AVR project is lowkey resting on her shoulders. main character energy fr fr 🔥

reminder bestie: these are the values as declared in this header — 33 and 34. don't be out here assuming different numbers, copy them exactly, periodt.

💜 AUTHOR 💜

Generated automatically by Doxygen for AVR-LibC from the source code. so like, nobody hand-wrote this one, a robot did it, and honestly? she ate 🤖✨

and that's the whole page!! 🫶 this was AVR-LibC Version 2.2.1, manual section 3avr, and it's the errno.h page — go forth and check your errno, bestie, your future self will thank you 💖🎀🦋

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