main.rs

#[macro_use]
extern crate error_chain;
extern crate same_file;

use same_file::Handle;
use std::path::Path;
use std::fs::File;
use std::io::Read;

 error_chain! {
     foreign_links {
          IOError(::std::io::Error);
     }
 }

fn run() -> Result<()> {
   let path_to_read = Path::new("new.txt");
   let mut file = File::open(&path_to_read)?;

   let mut s = String::new();

   let stdout_handle = Handle::stdout()?;
   let handle = Handle::from_path(path_to_read)?;

   if stdout_handle == handle {
       eprintln!("You are reading and writing to the same file");
    } else {
       println!("The file contents are: \n {:?}",s.to_uppercase());
    }      

   file.read_to_string(&mut s)?;

   Ok(())

}
quick_main!(run);