mprober 0.10.12

This program aims to collect Linux system information including hostname, kernel version, uptime, RTC time, load average, CPU, memory, network interfaces and block devices. It can be used not only as a normal CLI tool, but also a web application with a front-end webpage and useful HTTP APIs.
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use std::io::{self, ErrorKind};

use crate::scanner_rust::{Scanner, ScannerError};

const LOADAVG_PATH: &str = "/proc/loadavg";

#[derive(Debug, Clone)]
pub struct LoadAverage {
    pub one: f64,
    pub five: f64,
    pub fifteen: f64,
}

impl LoadAverage {
    pub fn get_load_average() -> Result<LoadAverage, ScannerError> {
        let mut sc = Scanner::scan_path(LOADAVG_PATH)?;

        let one = match sc.next_f64()? {
            Some(v) => v,
            None => {
                return Err(ScannerError::IOError(io::Error::new(
                    ErrorKind::UnexpectedEof,
                    "Cannot find the load average within one minute.",
                )))
            }
        };

        let five = match sc.next_f64()? {
            Some(v) => v,
            None => {
                return Err(ScannerError::IOError(io::Error::new(
                    ErrorKind::UnexpectedEof,
                    "Cannot find the load average within five minutes.",
                )))
            }
        };

        let fifteen = match sc.next_f64()? {
            Some(v) => v,
            None => {
                return Err(ScannerError::IOError(io::Error::new(
                    ErrorKind::UnexpectedEof,
                    "Cannot find the load average within fifteen minutes.",
                )))
            }
        };

        Ok(LoadAverage {
            one,
            five,
            fifteen,
        })
    }
}