ELF_ERRNO(3)

📦
version 0.197 · 2 versions
  • 0.197 · alpine 3.22, alpine 3.23, alpine 3.24, arch rolling, centos-stream 10, centos-stream 9, debian trixie, fedora 43, fedora 44, nixos 26.05, nixpkgs unstable, opensuse-leap 16.0, ubuntu questing, ubuntu resolute, ubuntu stonking (latest)
  • 15.1 · freebsd 14.5, freebsd 15.1, nixpkgs unstable
, in alpine 3.22, alpine 3.23, alpine 3.24, arch rolling, centos-stream 10, centos-stream 9, debian trixie, fedora 43, fedora 44, nixos 26.05, nixpkgs unstable, opensuse-leap 16.0, ubuntu questing, ubuntu resolute, ubuntu stonking

✨ ELF_ERRNO(3) ✨

ok so bestie, welcome to the libelf corner of the universe 💖 this one's from the Libelf Programmer's Manual, and it's short, it's sweet, it's giving "tiny function, huge emotional support" energy 🎀

🌸 NAME 🌸

elf_errno — grab the error code from the last libelf call that flopped 😭

🦋 SYNOPSIS 🦋

#include <libelf.h>

int elf_errno(void);

💅 DESCRIPTION 💅

okay so elf_errno is literally the function you call when a libelf library function just did not eat 💀 it hands you back the error code from that last failing call, and that code tells you what kind of error went down during the call that broke.

and here's the part that's lowkey iconic: each thread keeps its own separate error code ✨ so your threads aren't out here sharing trauma, they each have their own little diary of what went wrong 📓🫶

🧚 PARAMETERS 🧚

this function takes no parameters. not a single one. zero. she needs nothing from you, she's independent like that 👑

⭐ RETURN VALUE ⭐

elf_errno returns an int — the most recent error code for the current thread 💜

  • if no error has occurred, it returns 0 🌈
  • if an error did occur, you get a non-zero error code matching that specific error 🔥
pro tip bestie: you can pass those error codes to elf_errmsg and it'll spin you up a whole string describing the error, so you actually know what happened instead of just staring at a number 🙈✨

👀 SEE ALSO 👀

🐛 REPORTING BUGS 🐛

found a bug? don't be shy, tell the people 📣 report it to <elfutils-devel@sourceware.org> or hit up https://sourceware.org/bugzilla/ 🫶

and that's the whole vibe, bestie 💖 this was Libelf, dated 2024-06-24 — go forth and debug your elf files like the main character you are 👑💅✨

📦 where this page comes from