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if_nametoindex/
if_nametoindex.rs

1use net_interfaces::name_to_index;
2use net_interfaces::IfName;
3fn main() {
4    let args = std::env::args().collect::<Vec<_>>();
5    if args.len() < 2 {
6        println!("Usage: {} <if_index>", &args[0]);
7        std::process::exit(1);
8    }
9
10    let name = match IfName::new(args[1].clone()) {
11        Ok(n) => n,
12        _ => {
13            eprintln!("{}: Invalid interface name", &args[0]);
14            std::process::exit(1);
15        }
16    };
17
18    match name_to_index(name) {
19        Ok(id) => {
20            println!("{}", id);
21        },
22        _ => {
23            eprintln!("{}: No such interface", args[0]);
24            std::process::exit(2);
25        }
26    }
27}