wasmer/lib/wasi-tests/wasitests/wasi_sees_virtual_root.rs

// Args:
// mapdir: act1:wasitests/test_fs/hamlet/act1
// mapdir: act2:wasitests/test_fs/hamlet/act2
// mapdir: act1-again:wasitests/test_fs/hamlet/act1

use std::fs;

fn main() {
    // just cheat in this test because there is no comparison for native
    #[cfg(not(target_os = "wasi"))]
    let results = {
        let start = vec!["\"/act1\"", "\"/act1-again\"", "\"/act2\""];

        let mut out = vec![];
        for _ in 0..4 {
            for path_str in &start {
                out.push(path_str.to_string());
            }
        }

        out.push("ROOT IS SAFE".to_string());
        out
    };

    #[cfg(target_os = "wasi")]
    let results = {
        let mut out = vec![];

        let read_dir = fs::read_dir("/").unwrap();
        for entry in read_dir {
            out.push(format!("{:?}", entry.unwrap().path()))
        }
        let read_dir = fs::read_dir("act1/..").unwrap();
        for entry in read_dir {
            out.push(format!("{:?}", entry.unwrap().path()))
        }
        let read_dir = fs::read_dir("act1/../../..").unwrap();
        for entry in read_dir {
            out.push(format!("{:?}", entry.unwrap().path()))
        }
        let read_dir = fs::read_dir("act1/../../act2/../act1/../../../").unwrap();
        for entry in read_dir {
            out.push(format!("{:?}", entry.unwrap().path()))
        }
        let f = fs::OpenOptions::new().write(true).open("/abc");

        if f.is_ok() {
            out.push("ROOT IS NOT SAFE".to_string());
        } else {
            out.push("ROOT IS SAFE".to_string());
        }

        out
    };

    for result in results {
        println!("{}", result);
    }
}