mirror of https://github.com/rust-lang/cargo
101 lines
3.1 KiB
Rust
101 lines
3.1 KiB
Rust
//! Tests for ctrl-C handling.
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use cargo_test_support::{project, slow_cpu_multiplier};
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use std::fs;
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use std::io::{self, Read};
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use std::net::TcpListener;
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use std::process::{Child, Stdio};
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use std::thread;
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#[cargo_test]
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fn ctrl_c_kills_everyone() {
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let listener = TcpListener::bind("127.0.0.1:0").unwrap();
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let addr = listener.local_addr().unwrap();
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let p = project()
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.file(
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"Cargo.toml",
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r#"
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[package]
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name = "foo"
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version = "0.0.1"
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authors = []
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build = "build.rs"
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"#,
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)
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.file("src/lib.rs", "")
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.file(
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"build.rs",
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&format!(
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r#"
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use std::net::TcpStream;
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use std::io::Read;
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fn main() {{
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let mut socket = TcpStream::connect("{}").unwrap();
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let _ = socket.read(&mut [0; 10]);
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panic!("that read should never return");
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}}
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"#,
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addr
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),
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)
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.build();
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let mut cargo = p.cargo("check").build_command();
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cargo
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.stdin(Stdio::piped())
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.stdout(Stdio::piped())
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.stderr(Stdio::piped())
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.env("__CARGO_TEST_SETSID_PLEASE_DONT_USE_ELSEWHERE", "1");
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let mut child = cargo.spawn().unwrap();
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let mut sock = listener.accept().unwrap().0;
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ctrl_c(&mut child);
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assert!(!child.wait().unwrap().success());
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match sock.read(&mut [0; 10]) {
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Ok(n) => assert_eq!(n, 0),
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Err(e) => assert_eq!(e.kind(), io::ErrorKind::ConnectionReset),
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}
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// Ok so what we just did was spawn cargo that spawned a build script, then
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// we killed cargo in hopes of it killing the build script as well. If all
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// went well the build script is now dead. On Windows, however, this is
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// enforced with job objects which means that it may actually be in the
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// *process* of being torn down at this point.
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//
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// Now on Windows we can't completely remove a file until all handles to it
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// have been closed. Including those that represent running processes. So if
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// we were to return here then there may still be an open reference to some
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// file in the build directory. What we want to actually do is wait for the
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// build script to *complete* exit. Take care of that by blowing away the
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// build directory here, and panicking if we eventually spin too long
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// without being able to.
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for i in 0..10 {
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match fs::remove_dir_all(&p.root().join("target")) {
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Ok(()) => return,
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Err(e) => println!("attempt {}: {}", i, e),
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}
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thread::sleep(slow_cpu_multiplier(100));
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}
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panic!(
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"couldn't remove build directory after a few tries, seems like \
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we won't be able to!"
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);
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}
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#[cfg(unix)]
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pub fn ctrl_c(child: &mut Child) {
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let r = unsafe { libc::kill(-(child.id() as i32), libc::SIGINT) };
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if r < 0 {
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panic!("failed to kill: {}", io::Error::last_os_error());
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}
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}
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#[cfg(windows)]
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pub fn ctrl_c(child: &mut Child) {
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child.kill().unwrap();
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}
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