How can I read one character from stdin without having to hit enter?

I want to run an executable that blocks on stdin and when a key is pressed that same character is printed immediately without Enter having to be pressed.

How can I read one character from stdin without having to hit Enter? I started with this example:

fn main() {
    println!("Type something!");

    let mut line = String::new();
    let input = std::io::stdin().read_line(&mut line).expect("Failed to read line");

    println!("{}", input);
}

I looked through the API and tried replacing read_line() with bytes(), but everything I try requires me to hit Enter before read occurs.

This question was asked for C/C++, but there seems to be no standard way to do it: Capture characters from standard input without waiting for enter to be pressed

It might not be doable in Rust considering it's not simple in C/C++.

Use one of the 'ncurses' libraries now available, for instance this one.

Add the dependency in Cargo

[dependencies]
ncurses = "5.86.0"

and include in main.rs:

extern crate ncurses;
use ncurses::*; // watch for globs

Follow the examples in the library to initialize ncurses and wait for single character input like this:

initscr();
/* Print to the back buffer. */
printw("Hello, world!");

/* Update the screen. */
refresh();

/* Wait for a key press. */
getch();

/* Terminate ncurses. */
endwin();

Stack Overflow Q#26321592, score: 15