Rust MetadataExt.mode用法及代码示例

use std::fs;
use std::os::unix::fs::MetadataExt;
use std::io;

fn main() -> io::Result<()> {
    let meta = fs::metadata("some_file")?;
    let mode = meta.mode();
    let user_has_write_access      = mode & 0o200;
    let user_has_read_write_access = mode & 0o600;
    let group_has_read_access      = mode & 0o040;
    let others_have_exec_access    = mode & 0o001;
    Ok(())
}