Dot execing Rust

dotexec.md

• Wrapper script

root@dev:~# cat `which rustwrap`
#!/usr/bin/env bash

rustc "$1" -o foobar && shift && ./foobar "$@"

• Mount binfmt_misc

mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc

• Activate binfmt_misc

echo 1 > /proc/sys/fs/binfmt_misc/status

• Register Rust as a binary format

echo ':rust:E::rs::/usr/local/bin/rustwrap:OC' | sudo tee /proc/sys/fs/binfmt_misc/register

• Test code

root@dev:~# cat test.rs
use std::process;
use std::env;

fn main() {
	let args: Vec<String> = env::args().skip(1).collect();
	println!("{:?}", args);
	process::exit(123);
}

• Set exec flag

chmod u+x test.rs

• Run!

root@dev:~# ./test.rs foo bar
["foo", "bar"]
root@dev:~# echo $?
123