rustix 0.33.7

Safe Rust bindings to POSIX/Unix/Linux/Winsock2-like syscalls
Documentation 
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#[cfg(not(target_os = "redox"))]
#[test]
fn test_flock() {
    use rustix::fs::{cwd, flock, openat, FlockOperation, Mode, OFlags};

    let f = openat(&cwd(), "Cargo.toml", OFlags::RDONLY, Mode::empty()).unwrap();
    flock(&f, FlockOperation::LockExclusive).unwrap();
    flock(&f, FlockOperation::Unlock).unwrap();
    let g = openat(&cwd(), "Cargo.toml", OFlags::RDONLY, Mode::empty()).unwrap();
    flock(&g, FlockOperation::LockExclusive).unwrap();
    flock(&g, FlockOperation::Unlock).unwrap();
    drop(f);
    drop(g);

    let f = openat(&cwd(), "Cargo.toml", OFlags::RDONLY, Mode::empty()).unwrap();
    flock(&f, FlockOperation::LockShared).unwrap();
    let g = openat(&cwd(), "Cargo.toml", OFlags::RDONLY, Mode::empty()).unwrap();
    flock(&g, FlockOperation::LockShared).unwrap();
    flock(&f, FlockOperation::Unlock).unwrap();
    flock(&g, FlockOperation::Unlock).unwrap();
    drop(f);
    drop(g);

    let f = openat(&cwd(), "Cargo.toml", OFlags::RDONLY, Mode::empty()).unwrap();
    flock(&f, FlockOperation::LockShared).unwrap();
    flock(&f, FlockOperation::LockExclusive).unwrap();
    flock(&f, FlockOperation::Unlock).unwrap();
    let g = openat(&cwd(), "Cargo.toml", OFlags::RDONLY, Mode::empty()).unwrap();
    flock(&g, FlockOperation::LockShared).unwrap();
    flock(&g, FlockOperation::LockExclusive).unwrap();
    flock(&g, FlockOperation::Unlock).unwrap();
    drop(f);
    drop(g);
}