[go: up one dir, main page]

sysctl 0.1.1

Simplified Rust interface to libc::sysctl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

extern crate sysctl;
extern crate libc;

fn main() {

    assert_eq!(unsafe { libc::geteuid() },
               0,
               "This example must be run as root");

    let ctl = "hw.usb.debug";

    println!("\nFlipping value of sysctl {}", ctl);

    let old_val_enum = sysctl::value(ctl).unwrap();

    if let sysctl::CtlValue::Int(old_val) = old_val_enum {
        println!("Old value: {}", old_val);

        let l = {
            if old_val == 0 { 1 } else { 0 }
        };
        let new_val_enum = sysctl::set_value(ctl, sysctl::CtlValue::Int(l)).unwrap();

        if let sysctl::CtlValue::Int(new_val) = new_val_enum {

            if new_val == l {
                println!("New value succcesfully set to: {}", new_val);
            } else {
                println!("Error: Could not set new value");
            }
            println!("Restore old value");

            sysctl::set_value(ctl, old_val_enum).unwrap();

        }
    }
}