rs-machineid 0.2.0

Get the unique machine ID of any host (without admin privileges).
Documentation 
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#![cfg(any(target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]

use crate::{
    errors::MachineIdError,
    utils::{exec, read_file},
};

pub fn get_machine_id() -> Result<String, MachineIdError> {
    if let Some(out) = read_file("/etc/hostid") {
        let id = out.trim().to_string();
        if !id.is_empty() {
            return Ok(id);
        }
    }
    if let Some(out) = exec(r#"kenv -q smbios.system.uuid"#) {
        let id = out.trim().to_string();
        if !id.is_empty() {
            return Ok(id);
        }
    }
    Err(MachineIdError::NotFound)
}