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Vendor dependencies for 0.3.0 release

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Robert Garrett
2025-09-27 10:29:08 -05:00
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# 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 = "2021"
rust-version = "1.69.0"
name = "ctrlc"
version = "3.5.0"
authors = ["Antti Keränen <detegr@gmail.com>"]
build = false
exclude = [
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"/appveyor.yml",
]
autolib = false
autobins = false
autoexamples = false
autotests = false
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description = "Easy Ctrl-C handler for Rust projects"
homepage = "https://github.com/Detegr/rust-ctrlc"
documentation = "https://detegr.github.io/doc/ctrlc"
readme = "README.md"
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name = "ctrlc"
path = "src/lib.rs"
[[example]]
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path = "examples/issue_46_example.rs"
[[example]]
name = "readme_example"
path = "examples/readme_example.rs"
[[test]]
name = "issue_97"
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harness = false
[[test]]
name = "main"
path = "tests/main/mod.rs"
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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 "[]"
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Copyright 2017 CtrlC developers
Licensed under the Apache License, Version 2.0 (the "License");
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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,
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The above copyright notice and this permission notice
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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.

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# CtrlC
A simple easy to use wrapper around Ctrl-C signal.
[Documentation](http://detegr.github.io/doc/ctrlc/)
## Example usage
In `cargo.toml`:
```toml
[dependencies]
ctrlc = "3.5"
```
then, in `main.rs`
```rust
use std::sync::mpsc::channel;
use ctrlc;
fn main() {
let (tx, rx) = channel();
ctrlc::set_handler(move || tx.send(()).expect("Could not send signal on channel."))
.expect("Error setting Ctrl-C handler");
println!("Waiting for Ctrl-C...");
rx.recv().expect("Could not receive from channel.");
println!("Got it! Exiting...");
}
```
#### Try the example yourself
`cargo build --examples && target/debug/examples/readme_example`
## Handling SIGTERM and SIGHUP
Add CtrlC to Cargo.toml using `termination` feature and CtrlC will handle SIGINT, SIGTERM and SIGHUP.
## License
Licensed under either of
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you shall be dual licensed as above, without any
additional terms or conditions.
## Similar crates
There are alternatives that give you more control over the different signals and/or add async support.
- [signal-hook](https://github.com/vorner/signal-hook)
- [tokio::signal](https://docs.rs/tokio/latest/tokio/signal/index.html)

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use std::process;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
use std::thread;
use std::time::Duration;
fn main() {
let running = Arc::new(AtomicUsize::new(0));
let r = running.clone();
ctrlc::set_handler(move || {
let prev = r.fetch_add(1, Ordering::SeqCst);
if prev == 0 {
println!("Exiting...");
} else {
process::exit(0);
}
})
.expect("Error setting Ctrl-C handler");
println!("Running...");
for _ in 1..6 {
thread::sleep(Duration::from_secs(5));
if running.load(Ordering::SeqCst) > 0 {
break;
}
}
}

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// Copyright (c) 2015 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
use ctrlc;
use std::sync::mpsc::channel;
fn main() {
let (tx, rx) = channel();
ctrlc::set_handler(move || tx.send(()).expect("Could not send signal on channel."))
.expect("Error setting Ctrl-C handler");
println!("Waiting for Ctrl-C...");
rx.recv().expect("Could not receive from channel.");
println!("Got it! Exiting...");
}

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use crate::platform;
use std::fmt;
/// Ctrl-C error.
#[derive(Debug)]
pub enum Error {
/// Signal could not be found from the system.
NoSuchSignal(crate::SignalType),
/// Ctrl-C signal handler already registered.
MultipleHandlers,
/// Unexpected system error.
System(std::io::Error),
}
impl Error {
fn describe(&self) -> &str {
match *self {
Error::NoSuchSignal(_) => "Signal could not be found from the system",
Error::MultipleHandlers => "Ctrl-C signal handler already registered",
Error::System(_) => "Unexpected system error",
}
}
}
impl From<platform::Error> for Error {
fn from(e: platform::Error) -> Error {
#[cfg(not(windows))]
if e == platform::Error::EEXIST {
return Error::MultipleHandlers;
}
let system_error = std::io::Error::new(std::io::ErrorKind::Other, e);
Error::System(system_error)
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Ctrl-C error: {}", self.describe())
}
}
impl std::error::Error for Error {
fn description(&self) -> &str {
self.describe()
}
fn cause(&self) -> Option<&dyn std::error::Error> {
match *self {
Error::System(ref e) => Some(e),
_ => None,
}
}
}

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// Copyright (c) 2017 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
#![warn(missing_docs)]
//! Cross platform handling of Ctrl-C signals.
//!
//! [HandlerRoutine]:https://msdn.microsoft.com/en-us/library/windows/desktop/ms683242.aspx
//!
//! [set_handler()](fn.set_handler.html) allows setting a handler closure which is executed on
//! `Ctrl+C`. On Unix, this corresponds to a `SIGINT` signal. On windows, `Ctrl+C` corresponds to
//! [`CTRL_C_EVENT`][HandlerRoutine] or [`CTRL_BREAK_EVENT`][HandlerRoutine].
//!
//! Setting a handler will start a new dedicated signal handling thread where we
//! execute the handler each time we receive a `Ctrl+C` signal. There can only be
//! one handler, you would typically set one at the start of your program.
//!
//! # Example
//! ```no_run
//! # #[allow(clippy::needless_doctest_main)]
//! use std::sync::atomic::{AtomicBool, Ordering};
//! use std::sync::Arc;
//!
//! fn main() {
//! let running = Arc::new(AtomicBool::new(true));
//! let r = running.clone();
//!
//! ctrlc::set_handler(move || {
//! r.store(false, Ordering::SeqCst);
//! }).expect("Error setting Ctrl-C handler");
//!
//! println!("Waiting for Ctrl-C...");
//! while running.load(Ordering::SeqCst) {}
//! println!("Got it! Exiting...");
//! }
//! ```
//!
//! # Handling SIGTERM and SIGHUP
//! Handling of `SIGTERM` and `SIGHUP` can be enabled with `termination` feature. If this is enabled,
//! the handler specified by `set_handler()` will be executed for `SIGINT`, `SIGTERM` and `SIGHUP`.
//!
#[macro_use]
mod error;
mod platform;
pub use platform::Signal;
mod signal;
pub use signal::*;
pub use error::Error;
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Mutex;
use std::thread;
static INIT: AtomicBool = AtomicBool::new(false);
static INIT_LOCK: Mutex<()> = Mutex::new(());
/// Register signal handler for Ctrl-C.
///
/// Starts a new dedicated signal handling thread. Should only be called once,
/// typically at the start of your program.
///
/// # Example
/// ```no_run
/// ctrlc::set_handler(|| println!("Hello world!")).expect("Error setting Ctrl-C handler");
/// ```
///
/// # Warning
/// On Unix, the handler registration for `SIGINT`, (`SIGTERM` and `SIGHUP` if termination feature
/// is enabled) or `SA_SIGINFO` posix signal handlers will be overwritten. On Windows, multiple
/// handler routines are allowed, but they are called on a last-registered, first-called basis
/// until the signal is handled.
///
/// ctrlc::try_set_handler will error (on Unix) if another signal handler exists for the same
/// signal(s) that ctrlc is trying to attach the handler to.
///
/// On Unix, signal dispositions and signal handlers are inherited by child processes created via
/// `fork(2)` on, but not by child processes created via `execve(2)`.
/// Signal handlers are not inherited on Windows.
///
/// # Errors
/// Will return an error if a system error occurred while setting the handler.
///
/// # Panics
/// Any panic in the handler will not be caught and will cause the signal handler thread to stop.
pub fn set_handler<F>(user_handler: F) -> Result<(), Error>
where
F: FnMut() + 'static + Send,
{
init_and_set_handler(user_handler, true)
}
/// The same as ctrlc::set_handler but errors if a handler already exists for the signal(s).
///
/// # Errors
/// Will return an error if another handler exists or if a system error occurred while setting the
/// handler.
pub fn try_set_handler<F>(user_handler: F) -> Result<(), Error>
where
F: FnMut() + 'static + Send,
{
init_and_set_handler(user_handler, false)
}
fn init_and_set_handler<F>(user_handler: F, overwrite: bool) -> Result<(), Error>
where
F: FnMut() + 'static + Send,
{
if !INIT.load(Ordering::Acquire) {
let _guard = INIT_LOCK.lock().unwrap();
if !INIT.load(Ordering::Relaxed) {
set_handler_inner(user_handler, overwrite)?;
INIT.store(true, Ordering::Release);
return Ok(());
}
}
Err(Error::MultipleHandlers)
}
fn set_handler_inner<F>(mut user_handler: F, overwrite: bool) -> Result<(), Error>
where
F: FnMut() + 'static + Send,
{
unsafe {
platform::init_os_handler(overwrite)?;
}
thread::Builder::new()
.name("ctrl-c".into())
.spawn(move || loop {
unsafe {
platform::block_ctrl_c().expect("Critical system error while waiting for Ctrl-C");
}
user_handler();
})
.map_err(Error::System)?;
Ok(())
}

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// Copyright (c) 2017 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
#[cfg(unix)]
mod unix;
#[cfg(windows)]
mod windows;
#[cfg(unix)]
pub use self::unix::*;
#[cfg(windows)]
pub use self::windows::*;

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// Copyright (c) 2017 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
use crate::error::Error as CtrlcError;
#[cfg(not(target_vendor = "apple"))]
#[allow(static_mut_refs)] // rust-version = "1.69.0"
mod implementation {
static mut SEMAPHORE: nix::libc::sem_t = unsafe { std::mem::zeroed() };
const SEM_THREAD_SHARED: nix::libc::c_int = 0;
pub unsafe fn sem_init() {
nix::libc::sem_init(&mut SEMAPHORE as *mut _, SEM_THREAD_SHARED, 0);
}
pub unsafe fn sem_post() {
// No errors apply. EOVERFLOW is hypothetically possible but it's equivalent to a success for our oneshot use-case.
let _ = nix::libc::sem_post(&mut SEMAPHORE as *mut _);
}
pub unsafe fn sem_wait_forever() {
// The only realistic error is EINTR, which is restartable.
while nix::libc::sem_wait(&mut SEMAPHORE as *mut _) == -1 {}
}
}
#[cfg(target_vendor = "apple")]
mod implementation {
static mut SEMAPHORE: dispatch::ffi::dispatch_semaphore_t = std::ptr::null_mut();
pub unsafe fn sem_init() {
SEMAPHORE = dispatch::ffi::dispatch_semaphore_create(0);
}
pub unsafe fn sem_post() {
dispatch::ffi::dispatch_semaphore_signal(SEMAPHORE);
}
pub unsafe fn sem_wait_forever() {
dispatch::ffi::dispatch_semaphore_wait(SEMAPHORE, dispatch::ffi::DISPATCH_TIME_FOREVER);
}
}
/// Platform specific error type
pub type Error = nix::Error;
/// Platform specific signal type
pub type Signal = nix::sys::signal::Signal;
extern "C" fn os_handler(_: nix::libc::c_int) {
unsafe {
implementation::sem_post();
}
}
/// Register os signal handler.
///
/// Must be called before calling [`block_ctrl_c()`](fn.block_ctrl_c.html)
/// and should only be called once.
///
/// # Errors
/// Will return an error if a system error occurred.
///
#[inline]
pub unsafe fn init_os_handler(overwrite: bool) -> Result<(), Error> {
use nix::sys::signal;
implementation::sem_init();
let handler = signal::SigHandler::Handler(os_handler);
#[cfg(not(target_os = "nto"))]
let new_action = signal::SigAction::new(
handler,
signal::SaFlags::SA_RESTART,
signal::SigSet::empty(),
);
// SA_RESTART is not supported on QNX Neutrino 7.1 and before
#[cfg(target_os = "nto")]
let new_action =
signal::SigAction::new(handler, signal::SaFlags::empty(), signal::SigSet::empty());
let sigint_old = signal::sigaction(signal::Signal::SIGINT, &new_action)?;
if !overwrite && sigint_old.handler() != signal::SigHandler::SigDfl {
signal::sigaction(signal::Signal::SIGINT, &sigint_old).unwrap();
return Err(nix::Error::EEXIST);
}
#[cfg(feature = "termination")]
{
let sigterm_old = match signal::sigaction(signal::Signal::SIGTERM, &new_action) {
Ok(old) => old,
Err(e) => {
signal::sigaction(signal::Signal::SIGINT, &sigint_old).unwrap();
return Err(e);
}
};
if !overwrite && sigterm_old.handler() != signal::SigHandler::SigDfl {
signal::sigaction(signal::Signal::SIGINT, &sigint_old).unwrap();
signal::sigaction(signal::Signal::SIGTERM, &sigterm_old).unwrap();
return Err(nix::Error::EEXIST);
}
let sighup_old = match signal::sigaction(signal::Signal::SIGHUP, &new_action) {
Ok(old) => old,
Err(e) => {
signal::sigaction(signal::Signal::SIGINT, &sigint_old).unwrap();
signal::sigaction(signal::Signal::SIGTERM, &sigterm_old).unwrap();
return Err(e);
}
};
if !overwrite && sighup_old.handler() != signal::SigHandler::SigDfl {
signal::sigaction(signal::Signal::SIGINT, &sigint_old).unwrap();
signal::sigaction(signal::Signal::SIGTERM, &sigterm_old).unwrap();
signal::sigaction(signal::Signal::SIGHUP, &sighup_old).unwrap();
return Err(nix::Error::EEXIST);
}
}
Ok(())
}
/// Blocks until a Ctrl-C signal is received.
///
/// Must be called after calling [`init_os_handler()`](fn.init_os_handler.html).
///
/// # Errors
/// None.
///
#[inline]
pub unsafe fn block_ctrl_c() -> Result<(), CtrlcError> {
implementation::sem_wait_forever();
Ok(())
}

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// Copyright (c) 2017 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
use std::io;
use std::ptr;
use windows_sys::core::BOOL;
use windows_sys::Win32::Foundation::{CloseHandle, HANDLE, WAIT_FAILED, WAIT_OBJECT_0};
use windows_sys::Win32::System::Console::SetConsoleCtrlHandler;
use windows_sys::Win32::System::Threading::{
CreateSemaphoreA, ReleaseSemaphore, WaitForSingleObject, INFINITE,
};
/// Platform specific error type
pub type Error = io::Error;
/// Platform specific signal type
pub type Signal = u32;
const MAX_SEM_COUNT: i32 = 255;
static mut SEMAPHORE: HANDLE = 0 as HANDLE;
const TRUE: BOOL = 1;
const FALSE: BOOL = 0;
unsafe extern "system" fn os_handler(_: u32) -> BOOL {
// Assuming this always succeeds. Can't really handle errors in any meaningful way.
ReleaseSemaphore(SEMAPHORE, 1, ptr::null_mut());
TRUE
}
/// Register os signal handler.
///
/// Must be called before calling [`block_ctrl_c()`](fn.block_ctrl_c.html)
/// and should only be called once.
///
/// # Errors
/// Will return an error if a system error occurred.
///
#[inline]
pub unsafe fn init_os_handler(_overwrite: bool) -> Result<(), Error> {
SEMAPHORE = CreateSemaphoreA(ptr::null_mut(), 0, MAX_SEM_COUNT, ptr::null());
if SEMAPHORE.is_null() {
return Err(io::Error::last_os_error());
}
if SetConsoleCtrlHandler(Some(os_handler), TRUE) == FALSE {
let e = io::Error::last_os_error();
CloseHandle(SEMAPHORE);
SEMAPHORE = 0 as HANDLE;
return Err(e);
}
Ok(())
}
/// Blocks until a Ctrl-C signal is received.
///
/// Must be called after calling [`init_os_handler()`](fn.init_os_handler.html).
///
/// # Errors
/// Will return an error if a system error occurred.
///
#[inline]
pub unsafe fn block_ctrl_c() -> Result<(), Error> {
match WaitForSingleObject(SEMAPHORE, INFINITE) {
WAIT_OBJECT_0 => Ok(()),
WAIT_FAILED => Err(io::Error::last_os_error()),
ret => Err(io::Error::new(
io::ErrorKind::Other,
format!(
"WaitForSingleObject(), unexpected return value \"{:x}\"",
ret
),
)),
}
}

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// Copyright (c) 2017 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
use crate::platform;
/// A cross-platform way to represent Ctrl-C or program termination signal. Other
/// signals/events are supported via `Other`-variant.
#[derive(Debug)]
pub enum SignalType {
/// Ctrl-C
Ctrlc,
/// Program termination
/// Maps to `SIGTERM` and `SIGHUP` on *nix, `CTRL_CLOSE_EVENT` on Windows.
Termination,
/// Other signal/event using platform-specific data
Other(platform::Signal),
}

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// Copyright (c) 2023 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
#[cfg(unix)]
pub mod platform {
use std::io;
pub unsafe fn setup() -> io::Result<()> {
Ok(())
}
pub unsafe fn cleanup() -> io::Result<()> {
Ok(())
}
pub unsafe fn raise_ctrl_c() {
nix::sys::signal::raise(nix::sys::signal::SIGINT).unwrap();
}
pub unsafe fn print(fmt: ::std::fmt::Arguments) {
use self::io::Write;
let stdout = ::std::io::stdout();
stdout.lock().write_fmt(fmt).unwrap();
}
}
#[cfg(windows)]
pub mod platform {
use std::io;
use std::ptr;
use windows_sys::Win32::Foundation::{
GENERIC_READ, GENERIC_WRITE, HANDLE, INVALID_HANDLE_VALUE,
};
use windows_sys::Win32::Storage::FileSystem::{
CreateFileA, WriteFile, FILE_SHARE_WRITE, OPEN_EXISTING,
};
use windows_sys::Win32::System::Console::{
AllocConsole, AttachConsole, FreeConsole, GenerateConsoleCtrlEvent, GetConsoleMode,
GetStdHandle, SetStdHandle, ATTACH_PARENT_PROCESS, CTRL_C_EVENT, STD_ERROR_HANDLE,
STD_OUTPUT_HANDLE,
};
/// Stores a piped stdout handle or a cache that gets
/// flushed when we reattached to the old console.
enum Output {
Pipe(HANDLE),
Cached(Vec<u8>),
}
static mut OLD_OUT: *mut Output = 0 as *mut Output;
impl io::Write for Output {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
match *self {
Output::Pipe(handle) => unsafe {
let mut n = 0u32;
if WriteFile(
handle,
buf.as_ptr(),
buf.len() as u32,
&mut n as *mut u32,
ptr::null_mut(),
) == 0
{
Err(io::Error::last_os_error())
} else {
Ok(n as usize)
}
},
Output::Cached(ref mut s) => s.write(buf),
}
}
fn flush(&mut self) -> io::Result<()> {
Ok(())
}
}
impl Output {
/// Stores current piped stdout or creates a new output cache that will
/// be written to stdout at a later time.
fn new() -> io::Result<Output> {
unsafe {
let stdout = GetStdHandle(STD_OUTPUT_HANDLE);
if stdout.is_null() || stdout == INVALID_HANDLE_VALUE {
return Err(io::Error::last_os_error());
}
let mut out = 0u32;
match GetConsoleMode(stdout, &mut out as *mut u32) {
0 => Ok(Output::Pipe(stdout)),
_ => Ok(Output::Cached(Vec::new())),
}
}
}
/// Set stdout/stderr and flush cache.
unsafe fn set_as_std(self) -> io::Result<()> {
let stdout = match self {
Output::Pipe(h) => h,
Output::Cached(_) => get_stdout()?,
};
if SetStdHandle(STD_OUTPUT_HANDLE, stdout) == 0 {
return Err(io::Error::last_os_error());
}
if SetStdHandle(STD_ERROR_HANDLE, stdout) == 0 {
return Err(io::Error::last_os_error());
}
match self {
Output::Pipe(_) => Ok(()),
Output::Cached(ref s) => {
// Write cached output
use self::io::Write;
let out = io::stdout();
out.lock().write_all(&s[..])?;
Ok(())
}
}
}
}
unsafe fn get_stdout() -> io::Result<HANDLE> {
let stdout = CreateFileA(
"CONOUT$\0".as_ptr(),
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_WRITE,
ptr::null_mut(),
OPEN_EXISTING,
0,
0 as HANDLE,
);
if stdout.is_null() || stdout == INVALID_HANDLE_VALUE {
Err(io::Error::last_os_error())
} else {
Ok(stdout)
}
}
/// Detach from the current console and create a new one,
/// We do this because GenerateConsoleCtrlEvent() sends ctrl-c events
/// to all processes on the same console. We want events to be received
/// only by our process.
///
/// This breaks rust's stdout pre 1.18.0. Rust used to
/// [cache the std handles](https://github.com/rust-lang/rust/pull/40516)
///
pub unsafe fn setup() -> io::Result<()> {
let old_out = Output::new()?;
if FreeConsole() == 0 {
return Err(io::Error::last_os_error());
}
if AllocConsole() == 0 {
return Err(io::Error::last_os_error());
}
// AllocConsole will not always set stdout/stderr to the to the console buffer
// of the new terminal.
let stdout = get_stdout()?;
if SetStdHandle(STD_OUTPUT_HANDLE, stdout) == 0 {
return Err(io::Error::last_os_error());
}
if SetStdHandle(STD_ERROR_HANDLE, stdout) == 0 {
return Err(io::Error::last_os_error());
}
OLD_OUT = Box::into_raw(Box::new(old_out));
Ok(())
}
/// Reattach to the old console.
pub unsafe fn cleanup() -> io::Result<()> {
if FreeConsole() == 0 {
return Err(io::Error::last_os_error());
}
if AttachConsole(ATTACH_PARENT_PROCESS) == 0 {
return Err(io::Error::last_os_error());
}
Box::from_raw(OLD_OUT).set_as_std()?;
Ok(())
}
/// This will signal the whole process group.
pub unsafe fn raise_ctrl_c() {
assert!(GenerateConsoleCtrlEvent(CTRL_C_EVENT, 0) != 0);
}
/// Print to both consoles, this is not thread safe.
pub unsafe fn print(fmt: ::std::fmt::Arguments) {
use self::io::Write;
{
let stdout = io::stdout();
stdout.lock().write_fmt(fmt).unwrap();
}
{
assert!(!OLD_OUT.is_null());
(*OLD_OUT).write_fmt(fmt).unwrap();
}
}
}
macro_rules! run_tests {
( $($test_fn:ident),* ) => {
unsafe {
$(
harness::platform::print(format_args!("test {} ... ", stringify!($test_fn)));
$test_fn();
harness::platform::print(format_args!("ok\n"));
)*
}
}
}
pub fn run_harness(f: fn()) {
unsafe {
platform::setup().unwrap();
}
let default = std::panic::take_hook();
std::panic::set_hook(Box::new(move |info| {
unsafe {
platform::cleanup().unwrap();
}
(default)(info);
}));
println!("");
f();
println!("");
unsafe {
platform::cleanup().unwrap();
}
}

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// Copyright (c) 2023 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
#[macro_use]
mod harness;
use harness::{platform, run_harness};
mod test_signal_hook;
use test_signal_hook::run_signal_hook;
fn expect_multiple_handlers() {
#[cfg(not(windows))]
match ctrlc::try_set_handler(|| {}) {
Err(ctrlc::Error::MultipleHandlers) => {}
_ => panic!("Expected Error::MultipleHandlers"),
}
}
fn tests() {
run_tests!(run_signal_hook);
run_tests!(expect_multiple_handlers);
}
fn main() {
run_harness(tests);
}

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// Copyright (c) 2023 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
#[macro_use]
mod harness;
use harness::{platform, run_harness};
use std::sync::{
atomic::{AtomicBool, Ordering},
Arc,
};
fn test_set_handler() {
let flag = Arc::new(AtomicBool::new(false));
let flag_handler = Arc::clone(&flag);
ctrlc::set_handler(move || {
flag_handler.store(true, Ordering::SeqCst);
})
.unwrap();
unsafe {
platform::raise_ctrl_c();
}
std::thread::sleep(std::time::Duration::from_millis(100));
assert!(flag.load(Ordering::SeqCst));
match ctrlc::set_handler(|| {}) {
Err(ctrlc::Error::MultipleHandlers) => {}
ret => panic!("{:?}", ret),
}
}
fn tests() {
run_tests!(test_set_handler);
}
fn main() {
run_harness(tests);
}

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// Copyright (c) 2023 CtrlC developers
// 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. All files in the project carrying such
// notice may not be copied, modified, or distributed except
// according to those terms.
use std::sync::{
atomic::{AtomicBool, Ordering},
Arc,
};
pub fn run_signal_hook() {
let hook = Arc::new(AtomicBool::new(false));
signal_hook::flag::register(signal_hook::consts::SIGINT, Arc::clone(&hook)).unwrap();
unsafe {
super::platform::raise_ctrl_c();
}
std::thread::sleep(std::time::Duration::from_millis(100));
assert!(hook.load(Ordering::SeqCst));
}