45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
// run-pass
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// only-linux - pidfds are a linux-specific concept
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#![feature(linux_pidfd)]
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#![feature(rustc_private)]
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extern crate libc;
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use std::io::Error;
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use std::os::linux::process::{ChildExt, CommandExt};
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use std::process::Command;
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fn has_clone3() -> bool {
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let res = unsafe { libc::syscall(libc::SYS_clone3, 0, 0) };
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let err = (res == -1)
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.then(|| Error::last_os_error())
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.expect("probe syscall should not succeed");
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err.raw_os_error() != Some(libc::ENOSYS)
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}
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fn main() {
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// pidfds require the clone3 syscall
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if !has_clone3() {
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return;
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}
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// We don't assert the precise value, since the standard library
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// might have opened other file descriptors before our code runs.
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let _ = Command::new("echo")
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.create_pidfd(true)
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.spawn()
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.unwrap()
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.pidfd().expect("failed to obtain pidfd");
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let _ = Command::new("echo")
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.create_pidfd(false)
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.spawn()
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.unwrap()
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.pidfd().expect_err("pidfd should not have been created when create_pid(false) is set");
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let _ = Command::new("echo")
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.spawn()
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.unwrap()
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.pidfd().expect_err("pidfd should not have been created");
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}
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