Function std::env::current_dir
pub fn current_dir() -> Result<PathBuf>
Returns the current working directory as a PathBuf.
Errors
Returns an Err if the current working directory value is invalid. Possible cases:
- Current directory does not exist.
 - There are insufficient permissions to access the current directory.
 
Examples
use std::env;
fn main() -> std::io::Result<()> {
    let path = env::current_dir()?;
    println!("The current directory is {}", path.display());
    Ok(())
}
    © 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
    https://doc.rust-lang.org/std/env/fn.current_dir.html