sudo

Detect if you are running as root, restart self with sudo if needed.

The sudo program is required to be installed and setup correctly on the target system.

Example:

First, add sudo to your Cargo.toml:

yaml [dependencies] sudo = "0.3"

In your main.rs:

rust fn main() -> Result<(), Box<dyn Error>> { sudo::escalate_if_needed()?; println!("Hello, Root-World!"); Ok( () ) }

If you are using logging based on the log infrastructure you will get

Run a program with SUID

```bash $ cargo run --example suid 2020-04-17 15:13:49,450 INFO [suid] ① uid: 1000; euid: 1000; uid=1000(user) gid=1000(user) groups=1000(user),4(adm),27(sudo) 2020-04-17 15:13:49,453 TRACE [sudo] Running as User 2020-04-17 15:13:49,453 DEBUG [sudo] Escalating privileges [sudo] password for user: 2020-04-17 15:13:53,529 INFO [suid] ① uid: 0; euid: 0; uid=0(root) gid=0(root) groups=0(root) 2020-04-17 15:13:53,532 TRACE [sudo] Running as Root 2020-04-17 15:13:53,532 TRACE [sudo] already running as Root 2020-04-17 15:13:53,532 INFO [suid] ② uid: 0; euid: 0; uid=0(root) gid=0(root) groups=0(root)

```

Then give the file to root and add the suid flag.

bash $ sudo chown root target/debug/examples/suid $ sudo chmod 4755 target/debug/examples/suid

Now run the program again:

bash $ target/debug/examples/suid 2020-04-17 15:14:37,199 INFO [suid] ① uid: 1000; euid: 0; uid=1000(user) gid=1000(user) euid=0(root) groups=1000(user),4(adm),27(sudo) 2020-04-17 15:14:37,202 TRACE [sudo] Running as Suid 2020-04-17 15:14:37,202 TRACE [sudo] setuid(0) 2020-04-17 15:14:37,202 INFO [suid] ② uid: 0; euid: 0; uid=0(root) gid=1000(user) groups=1000(user),4(adm),27(sudo)