--- /dev/null
+{
+ "git": {
+ "sha1": "e1882701f6d21bd9f45c2941a85416c59fa019ac"
+ },
+ "path_in_vcs": ""
+}
\ No newline at end of file
--- /dev/null
+version: 2
+updates:
+ - package-ecosystem: "cargo"
+ directory: "/"
+ schedule:
+ interval: "weekly"
+ - package-ecosystem: "github-actions"
+ directory: "/"
+ schedule:
+ interval: "weekly"
--- /dev/null
+on:
+ push:
+ branches:
+ - main
+ pull_request:
+ schedule:
+ - cron: '5 21 * * 5'
+ workflow_dispatch:
+
+name: CI
+
+jobs:
+ test:
+ name: Test
+ runs-on: ${{ matrix.os }}
+ strategy:
+ matrix:
+ os: [ubuntu-latest, macos-latest, windows-latest]
+ rust: [stable, nightly, '1.48']
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v3
+ - name: Install toolchain
+ uses: dtolnay/rust-toolchain@master
+ with:
+ toolchain: ${{ matrix.rust }}
+ # Workaround link failures if XCode 14 is combined with Rust <= 1.53
+ - name: Downgrade to XCode 13
+ if: ${{ matrix.os == 'macos-latest' && matrix.rust == '1.48' }}
+ uses: maxim-lobanov/setup-xcode@v1
+ with:
+ xcode-version: '13'
+ - name: Setup cache
+ uses: Swatinem/rust-cache@v2
+ - name: Test (no features)
+ run: cargo test --no-default-features
+ - name: Test (all features)
+ run: cargo test --all-features
+
+
+ wasi:
+ name: Test WASI
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v3
+ - name: Install toolchain
+ uses: dtolnay/rust-toolchain@nightly
+ with:
+ targets: wasm32-wasi
+ - name: Install wasmtime
+ run: |
+ curl https://wasmtime.dev/install.sh -sSf | bash
+ echo "$HOME/.wasmtime/bin" >> $GITHUB_PATH
+ - name: Test (no features)
+ run: CARGO_TARGET_WASM32_WASI_RUNNER=wasmtime cargo test --target wasm32-wasi --no-default-features
+ - name: Test (all features)
+ run: CARGO_TARGET_WASM32_WASI_RUNNER=wasmtime cargo test --target wasm32-wasi --all-features
+
+
+ lints:
+ name: Rustfmt & Clippy
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v3
+ - name: Install toolchain
+ uses: dtolnay/rust-toolchain@stable
+ with:
+ components: rustfmt, clippy
+ - name: Check formatting
+ run: cargo fmt --check
+ - name: Check clippy
+ run: cargo clippy -- -D warnings
--- /dev/null
+target
+Cargo.lock
--- /dev/null
+# [Unreleased]
+
+# [0.3.0] - 2023-02-12
+
+- Add haiku support
+ [#42](https://github.com/lambda-fairy/rust-errno/pull/42)
+
+- Add AIX support
+ [#54](https://github.com/lambda-fairy/rust-errno/pull/54)
+
+- Add formatting with `#![no_std]`
+ [#44](https://github.com/lambda-fairy/rust-errno/pull/44)
+
+- Switch from `winapi` to `windows-sys` [#55](https://github.com/lambda-fairy/rust-errno/pull/55)
+
+- Update minimum Rust version to 1.48
+ [#48](https://github.com/lambda-fairy/rust-errno/pull/48) [#55](https://github.com/lambda-fairy/rust-errno/pull/55)
+
+- Upgrade to Rust 2018 edition [#59](https://github.com/lambda-fairy/rust-errno/pull/59)
+
+- wasm32-wasi: Use `__errno_location` instead of `feature(thread_local)`. [#66](https://github.com/lambda-fairy/rust-errno/pull/66)
+
+# [0.2.8] - 2021-10-27
+
+- Optionally support no_std
+ [#31](https://github.com/lambda-fairy/rust-errno/pull/31)
+
+[Unreleased]: https://github.com/lambda-fairy/rust-errno/compare/v0.3.0...HEAD
+[0.3.0]: https://github.com/lambda-fairy/rust-errno/compare/v0.2.8...v0.3.0
+[0.2.8]: https://github.com/lambda-fairy/rust-errno/compare/v0.2.7...v0.2.8
--- /dev/null
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+rust-version = "1.48"
+name = "errno"
+version = "0.3.0"
+authors = ["Chris Wong <lambda.fairy@gmail.com>"]
+description = "Cross-platform interface to the `errno` variable."
+documentation = "https://docs.rs/errno"
+readme = "README.md"
+categories = [
+ "no-std",
+ "os",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/lambda-fairy/rust-errno"
+
+[features]
+default = ["std"]
+std = []
+
+[target."cfg(target_os=\"dragonfly\")".dependencies.errno-dragonfly]
+version = "0.1.1"
+
+[target."cfg(target_os=\"hermit\")".dependencies.libc]
+version = "0.2"
+
+[target."cfg(target_os=\"wasi\")".dependencies.libc]
+version = "0.2"
+
+[target."cfg(unix)".dependencies.libc]
+version = "0.2"
+
+[target."cfg(windows)".dependencies.windows-sys]
+version = "0.45"
+features = [
+ "Win32_Foundation",
+ "Win32_System_Diagnostics_Debug",
+]
--- /dev/null
+[package]
+
+name = "errno"
+version = "0.3.0"
+authors = ["Chris Wong <lambda.fairy@gmail.com>"]
+
+license = "MIT OR Apache-2.0"
+edition = "2018"
+documentation = "https://docs.rs/errno"
+repository = "https://github.com/lambda-fairy/rust-errno"
+description = "Cross-platform interface to the `errno` variable."
+categories = ["no-std", "os"]
+rust-version = "1.48"
+
+[target.'cfg(unix)'.dependencies]
+libc = "0.2"
+
+[target.'cfg(windows)'.dependencies.windows-sys]
+version = "0.45"
+features = [
+ "Win32_Foundation",
+ "Win32_System_Diagnostics_Debug",
+]
+
+[target.'cfg(target_os="dragonfly")'.dependencies]
+errno-dragonfly = "0.1.1"
+
+[target.'cfg(target_os="wasi")'.dependencies]
+libc = "0.2"
+
+[target.'cfg(target_os="hermit")'.dependencies]
+libc = "0.2"
+
+[features]
+default = ["std"]
+std = []
--- /dev/null
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+ meet the following conditions:
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+ (a) You must give any other recipients of the Work or
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+ (b) You must cause any modified files to carry prominent notices
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+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also recommend that a
+ file or class name and description of purpose be included on the
+ same "printed page" as the copyright notice for easier
+ identification within third-party archives.
+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
--- /dev/null
+Copyright (c) 2014 Chris Wong
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
--- /dev/null
+# errno [](https://github.com/lambda-fairy/rust-errno/actions/workflows/main.yml) [](https://crates.io/crates/errno)
+
+Cross-platform interface to the [`errno`][errno] variable. Works on Rust 1.48 or newer.
+
+Documentation is available at <https://docs.rs/errno>.
+
+[errno]: https://en.wikipedia.org/wiki/Errno.h
+
+
+## Dependency
+
+Add to your `Cargo.toml`:
+
+```toml
+[dependencies]
+errno = "*"
+```
+
+
+## Comparison with `std::io::Error`
+
+The standard library provides [`Error::last_os_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
+
+[last_os_error]: https://doc.rust-lang.org/std/io/struct.Error.html#method.last_os_error
+
+
+## Examples
+
+```rust
+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:
+
+```toml
+[dependencies]
+errno = { version = "*", default-features = false }
+```
+
+The `Error` impl will be unavailable.
--- /dev/null
+msrv = "1.48"
--- /dev/null
+//! Implementation of `errno` functionality for RustyHermit.
+//!
+//! Currently, the error handling in RustyHermit isn't clearly
+//! defined. At the current stage of RustyHermit, only a placeholder
+//! is provided to be compatible to the classical errno interface.
+
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use Errno;
+
+pub fn with_description<F, T>(_err: Errno, callback: F) -> T
+where
+ F: FnOnce(Result<&str, Errno>) -> T,
+{
+ callback(Ok("unknown error"))
+}
+
+pub const STRERROR_NAME: &str = "strerror_r";
+
+pub fn errno() -> Errno {
+ Errno(0)
+}
+
+pub fn set_errno(_: Errno) {}
--- /dev/null
+//! Cross-platform interface to the `errno` variable.
+//!
+//! # Examples
+//! ```
+//! 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);
+//! ```
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[cfg_attr(unix, path = "unix.rs")]
+#[cfg_attr(windows, path = "windows.rs")]
+#[cfg_attr(target_os = "wasi", path = "wasi.rs")]
+#[cfg_attr(target_os = "hermit", path = "hermit.rs")]
+mod sys;
+
+use core::fmt;
+#[cfg(feature = "std")]
+use std::error::Error;
+#[cfg(feature = "std")]
+use std::io;
+
+/// Wraps a platform-specific error code.
+///
+/// The `Display` instance maps the code to a human-readable string. It
+/// calls [`strerror_r`][1] under POSIX, and [`FormatMessageW`][2] on
+/// Windows.
+///
+/// [1]: http://pubs.opengroup.org/onlinepubs/009695399/functions/strerror.html
+/// [2]: https://msdn.microsoft.com/en-us/library/windows/desktop/ms679351%28v=vs.85%29.aspx
+#[derive(Copy, Clone, Eq, Ord, PartialEq, PartialOrd, Hash)]
+pub struct Errno(pub i32);
+
+impl fmt::Debug for Errno {
+ fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+ sys::with_description(*self, |desc| {
+ fmt.debug_struct("Errno")
+ .field("code", &self.0)
+ .field("description", &desc.ok())
+ .finish()
+ })
+ }
+}
+
+impl fmt::Display for Errno {
+ fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+ sys::with_description(*self, |desc| match desc {
+ Ok(desc) => fmt.write_str(desc),
+ Err(fm_err) => write!(
+ fmt,
+ "OS error {} ({} returned error {})",
+ self.0,
+ sys::STRERROR_NAME,
+ fm_err.0
+ ),
+ })
+ }
+}
+
+impl From<Errno> for i32 {
+ fn from(e: Errno) -> Self {
+ e.0
+ }
+}
+
+#[cfg(feature = "std")]
+impl Error for Errno {
+ // TODO: Remove when MSRV >= 1.27
+ #[allow(deprecated)]
+ fn description(&self) -> &str {
+ "system error"
+ }
+}
+
+#[cfg(feature = "std")]
+impl From<Errno> for io::Error {
+ fn from(errno: Errno) -> Self {
+ io::Error::from_raw_os_error(errno.0)
+ }
+}
+
+/// Returns the platform-specific value of `errno`.
+pub fn errno() -> Errno {
+ sys::errno()
+}
+
+/// Sets the platform-specific value of `errno`.
+pub fn set_errno(err: Errno) {
+ sys::set_errno(err)
+}
+
+#[test]
+fn it_works() {
+ let x = errno();
+ set_errno(x);
+}
+
+#[cfg(feature = "std")]
+#[test]
+fn it_works_with_to_string() {
+ let x = errno();
+ let _ = x.to_string();
+}
+
+#[cfg(feature = "std")]
+#[test]
+fn check_description() {
+ let expect = if cfg!(windows) {
+ "Incorrect function."
+ } else if cfg!(target_os = "illumos") {
+ "Not owner"
+ } else if cfg!(target_os = "wasi") {
+ "Argument list too long"
+ } else if cfg!(target_os = "haiku") {
+ "Operation not allowed"
+ } else {
+ "Operation not permitted"
+ };
+
+ let errno_code = if cfg!(target_os = "haiku") {
+ -2147483633
+ } else {
+ 1
+ };
+ set_errno(Errno(errno_code));
+
+ assert_eq!(errno().to_string(), expect);
+ assert_eq!(
+ format!("{:?}", errno()),
+ format!(
+ "Errno {{ code: {}, description: Some({:?}) }}",
+ errno_code, expect
+ )
+ );
+}
+
+#[cfg(feature = "std")]
+#[test]
+fn check_error_into_errno() {
+ const ERROR_CODE: i32 = 1;
+
+ let error = io::Error::from_raw_os_error(ERROR_CODE);
+ let new_error: io::Error = Errno(ERROR_CODE).into();
+ assert_eq!(error.kind(), new_error.kind());
+}
--- /dev/null
+//! Implementation of `errno` functionality for Unix systems.
+//!
+//! Adapted from `src/libstd/sys/unix/os.rs` in the Rust distribution.
+
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use core::str;
+#[cfg(target_os = "dragonfly")]
+use errno_dragonfly::errno_location;
+use libc::{self, c_char, c_int, size_t, strlen};
+
+use crate::Errno;
+
+fn from_utf8_lossy(input: &[u8]) -> &str {
+ match str::from_utf8(input) {
+ Ok(valid) => valid,
+ Err(error) => unsafe { str::from_utf8_unchecked(&input[..error.valid_up_to()]) },
+ }
+}
+
+pub fn with_description<F, T>(err: Errno, callback: F) -> T
+where
+ F: FnOnce(Result<&str, Errno>) -> T,
+{
+ let mut buf = [0u8; 1024];
+ let c_str = unsafe {
+ if strerror_r(err.0, buf.as_mut_ptr() as *mut _, buf.len() as size_t) < 0 {
+ let fm_err = errno();
+ if fm_err != Errno(libc::ERANGE) {
+ return callback(Err(fm_err));
+ }
+ }
+ let c_str_len = strlen(buf.as_ptr() as *const _);
+ &buf[..c_str_len]
+ };
+ callback(Ok(from_utf8_lossy(c_str)))
+}
+
+pub const STRERROR_NAME: &str = "strerror_r";
+
+pub fn errno() -> Errno {
+ unsafe { Errno(*errno_location()) }
+}
+
+pub fn set_errno(Errno(errno): Errno) {
+ unsafe {
+ *errno_location() = errno;
+ }
+}
+
+extern "C" {
+ #[cfg(not(target_os = "dragonfly"))]
+ #[cfg_attr(
+ any(target_os = "macos", target_os = "ios", target_os = "freebsd"),
+ link_name = "__error"
+ )]
+ #[cfg_attr(
+ any(
+ target_os = "openbsd",
+ target_os = "netbsd",
+ target_os = "bitrig",
+ target_os = "android"
+ ),
+ link_name = "__errno"
+ )]
+ #[cfg_attr(
+ any(target_os = "solaris", target_os = "illumos"),
+ link_name = "___errno"
+ )]
+ #[cfg_attr(target_os = "haiku", link_name = "_errnop")]
+ #[cfg_attr(target_os = "linux", link_name = "__errno_location")]
+ #[cfg_attr(target_os = "aix", link_name = "_Errno")]
+ fn errno_location() -> *mut c_int;
+
+ #[cfg_attr(target_os = "linux", link_name = "__xpg_strerror_r")]
+ fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: size_t) -> c_int;
+}
--- /dev/null
+//! Implementation of `errno` functionality for WASI.
+//!
+//! Adapted from `unix.rs`.
+
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use core::str;
+use libc::{self, c_char, c_int, size_t, strlen};
+
+use crate::Errno;
+
+fn from_utf8_lossy(input: &[u8]) -> &str {
+ match str::from_utf8(input) {
+ Ok(valid) => valid,
+ Err(error) => unsafe { str::from_utf8_unchecked(&input[..error.valid_up_to()]) },
+ }
+}
+
+pub fn with_description<F, T>(err: Errno, callback: F) -> T
+where
+ F: FnOnce(Result<&str, Errno>) -> T,
+{
+ let mut buf = [0u8; 1024];
+ let c_str = unsafe {
+ if strerror_r(err.0, buf.as_mut_ptr() as *mut _, buf.len() as size_t) < 0 {
+ let fm_err = errno();
+ if fm_err != Errno(libc::ERANGE) {
+ return callback(Err(fm_err));
+ }
+ }
+ let c_str_len = strlen(buf.as_ptr() as *const _);
+ &buf[..c_str_len]
+ };
+ callback(Ok(from_utf8_lossy(c_str)))
+}
+
+pub const STRERROR_NAME: &str = "strerror_r";
+
+pub fn errno() -> Errno {
+ unsafe { Errno(*__errno_location()) }
+}
+
+pub fn set_errno(Errno(new_errno): Errno) {
+ unsafe {
+ *__errno_location() = new_errno;
+ }
+}
+
+extern "C" {
+ fn __errno_location() -> *mut c_int;
+ fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: size_t) -> c_int;
+}
--- /dev/null
+//! Implementation of `errno` functionality for Windows.
+//!
+//! Adapted from `src/libstd/sys/windows/os.rs` in the Rust distribution.
+
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use core::char::{self, REPLACEMENT_CHARACTER};
+use core::ptr;
+use core::str;
+use windows_sys::Win32::Foundation::{GetLastError, SetLastError, WIN32_ERROR};
+use windows_sys::Win32::System::Diagnostics::Debug::{
+ FormatMessageW, FORMAT_MESSAGE_FROM_SYSTEM, FORMAT_MESSAGE_IGNORE_INSERTS,
+};
+
+use crate::Errno;
+
+fn from_utf16_lossy<'a>(input: &[u16], output: &'a mut [u8]) -> &'a str {
+ let mut output_len = 0;
+ for c in char::decode_utf16(input.iter().copied().take_while(|&x| x != 0))
+ .map(|x| x.unwrap_or(REPLACEMENT_CHARACTER))
+ {
+ let c_len = c.len_utf8();
+ if c_len > output.len() - output_len {
+ break;
+ }
+ c.encode_utf8(&mut output[output_len..]);
+ output_len += c_len;
+ }
+ unsafe { str::from_utf8_unchecked(&output[..output_len]) }
+}
+
+pub fn with_description<F, T>(err: Errno, callback: F) -> T
+where
+ F: FnOnce(Result<&str, Errno>) -> T,
+{
+ // This value is calculated from the macro
+ // MAKELANGID(LANG_SYSTEM_DEFAULT, SUBLANG_SYS_DEFAULT)
+ let lang_id = 0x0800_u32;
+
+ let mut buf = [0u16; 2048];
+
+ unsafe {
+ let res = FormatMessageW(
+ FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+ ptr::null_mut(),
+ err.0 as u32,
+ lang_id,
+ buf.as_mut_ptr(),
+ buf.len() as u32,
+ ptr::null_mut(),
+ );
+ if res == 0 {
+ // Sometimes FormatMessageW can fail e.g. system doesn't like lang_id
+ let fm_err = errno();
+ return callback(Err(fm_err));
+ }
+
+ let mut msg = [0u8; 2048];
+ let msg = from_utf16_lossy(&buf[..res as usize], &mut msg[..]);
+ // Trim trailing CRLF inserted by FormatMessageW
+ callback(Ok(msg.trim_end()))
+ }
+}
+
+pub const STRERROR_NAME: &str = "FormatMessageW";
+
+pub fn errno() -> Errno {
+ unsafe { Errno(GetLastError() as i32) }
+}
+
+pub fn set_errno(Errno(errno): Errno) {
+ unsafe { SetLastError(errno as WIN32_ERROR) }
+}
projects / platform / upstream / rust-errno.git / commitdiff