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//@ run-pass
#![allow(stable_features)]
//@ ignore-windows - this is a unix-specific test
//@ ignore-wasm32 no processes
//@ ignore-sgx no processes
//@ ignore-fuchsia no execvp syscall
#![feature(process_exec, rustc_private)]
extern crate libc;
use std::env;
use std::io::Error;
use std::os::unix::process::CommandExt;
use std::process::Command;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::Arc;
fn main() {
if let Some(arg) = env::args().nth(1) {
match &arg[..] {
"test1" => println!("hello2"),
"test2" => assert_eq!(env::var("FOO").unwrap(), "BAR"),
"test3" => assert_eq!(env::current_dir().unwrap().to_str().unwrap(), "/"),
"empty" => {}
_ => panic!("unknown argument: {}", arg),
}
return;
}
let me = env::current_exe().unwrap();
let output = unsafe {
Command::new(&me)
.arg("test1")
.pre_exec(|| {
println!("hello");
Ok(())
})
.output()
.unwrap()
};
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert_eq!(output.stdout, b"hello\nhello2\n");
let output = unsafe {
Command::new(&me)
.arg("test3")
.pre_exec(|| {
env::set_current_dir("/").unwrap();
Ok(())
})
.output()
.unwrap()
};
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert!(output.stdout.is_empty());
let output = unsafe {
Command::new(&me)
.arg("bad")
.pre_exec(|| Err(Error::from_raw_os_error(102)))
.output()
.unwrap_err()
};
assert_eq!(output.raw_os_error(), Some(102));
let pid = unsafe { libc::getpid() };
assert!(pid >= 0);
let output = unsafe {
Command::new(&me)
.arg("empty")
.pre_exec(move || {
let child = libc::getpid();
assert!(child >= 0);
assert!(pid != child);
Ok(())
})
.output()
.unwrap()
};
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert!(output.stdout.is_empty());
let mem = Arc::new(AtomicUsize::new(0));
let mem2 = mem.clone();
let output = unsafe {
Command::new(&me)
.arg("empty")
.pre_exec(move || {
assert_eq!(mem2.fetch_add(1, Ordering::SeqCst), 0);
Ok(())
})
.output()
.unwrap()
};
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert!(output.stdout.is_empty());
assert_eq!(mem.load(Ordering::SeqCst), 0);
}
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