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errno (0.3.14)

Published 2026-03-26 10:57:47 +00:00 by siennathesane

Installation

[registry]
default = "gitea"

[registries.gitea]
index = "sparse+" # Sparse index
# index = "" # Git

[net]
git-fetch-with-cli = true
cargo add errno@0.3.14

About this package

Cross-platform interface to the `errno` variable.

errno CI Cargo

Cross-platform interface to the errno variable. Works on Rust 1.56 or newer.

Documentation is available at https://docs.rs/errno.

Dependency

Add to your Cargo.toml:

[dependencies]
errno = "0.3"

Comparison with std::io::Error

The standard library provides Error::last_os_error which fetches errno in the same way.

This crate provides these extra features:

  • No heap allocations
  • Optional #![no_std] support
  • A set_errno function

Examples

extern crate errno;
use errno::{Errno, errno, set_errno};

// Get the current value of errno
let e = errno();

// Set the current value of errno
set_errno(e);

// Extract the error code as an i32
let code = e.0;

// Display a human-friendly error message
println!("Error {}: {}", code, e);

#![no_std]

Enable #![no_std] support by disabling the default std feature:

[dependencies]
errno = { version = "0.3", default-features = false }

The Error impl will be unavailable.

Dependencies

ID Version
libc ^0.2
libc ^0.2
libc ^0.2
windows-sys >=0.52, <0.62
Details
Cargo
2026-03-26 10:57:47 +00:00
0
Chris Wong <lambda.fairy@gmail.com>
Dan Gohman <dev@sunfishcode.online>
Repository Site
Documentation Site
MIT OR Apache-2.0
11 KiB
Assets (1)
errno-0.3.14.crate 11 KiB
Versions (1) View all
0.3.14 2026-03-26