mprober_lib/uptime/
mod.rs

1use std::{
2    io::ErrorKind,
3    time::{Duration, SystemTime},
4};
5
6use chrono::prelude::*;
7
8use crate::scanner_rust::{generic_array::typenum::U24, ScannerAscii, ScannerError};
9
10#[derive(Default, Debug, Clone)]
11pub struct Uptime {
12    pub total_uptime:      Duration,
13    pub all_cpu_idle_time: Duration,
14}
15
16impl Uptime {
17    /// Get the btime (boot time) by subtract this uptime from the current unix epoch timestamp.
18    ///
19    /// ```rust
20    /// use mprober_lib::uptime;
21    ///
22    /// let uptime = uptime::get_uptime().unwrap();
23    /// let btime = uptime.get_btime();
24    ///
25    /// println!("{btime}");
26    /// ```
27    #[inline]
28    pub fn get_btime(&self) -> DateTime<Utc> {
29        (SystemTime::now() - self.total_uptime).into()
30    }
31}
32
33/// Get the uptime by reading the `/proc/uptime` file.
34///
35/// ```rust
36/// use mprober_lib::uptime;
37///
38/// let uptime = uptime::get_uptime().unwrap();
39///
40/// println!("{uptime:#?}");
41/// ```
42#[inline]
43pub fn get_uptime() -> Result<Uptime, ScannerError> {
44    let mut sc: ScannerAscii<_, U24> = ScannerAscii::scan_path2("/proc/uptime")?;
45
46    let uptime = sc.next_f64()?.ok_or(ErrorKind::UnexpectedEof)?;
47    let idle_time = sc.next_f64()?.ok_or(ErrorKind::UnexpectedEof)?;
48
49    Ok(Uptime {
50        total_uptime:      Duration::from_secs_f64(uptime),
51        all_cpu_idle_time: Duration::from_secs_f64(idle_time),
52    })
53}
mprober_lib/uptime/mod.rs

mprober_lib/uptime/
mod.rs
