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use std::collections::HashMap;
use std::fs::File;
use std::io;
use std::time::Duration;
use crate::{util, Error};
pub struct Uptime {
pub up: Duration,
pub idle: Duration,
}
impl Uptime {
const PATH: &'static str = "/proc/uptime";
pub fn from_system() -> io::Result<Self> {
Uptime::from_reader(File::open(Self::PATH)?)
}
pub fn from_reader(reader: impl io::Read) -> io::Result<Self> {
let mut reader = util::LineParser::new(reader);
let uptime = reader.parse_line(Self::from_str)?;
Ok(uptime)
}
pub fn from_str(input: &str) -> Result<Self, Error> {
let (input, up_secs) = util::parse_u64(input).ok_or("expected number")?;
let input = util::expect_bytes(".", input).ok_or("expected \".\"")?;
let (input, up_nanos) = util::parse_nanos(input).ok_or("expected number")?;
let (input, idle_secs) = util::parse_u64(input).ok_or("expected number")?;
let input = util::expect_bytes(".", input).ok_or("expected \".\"")?;
let (_input, idle_nanos) = util::parse_nanos(input).ok_or("expected number")?;
Ok(Uptime {
up: Duration::new(up_secs, up_nanos),
idle: Duration::new(idle_secs, idle_nanos),
})
}
}
#[cfg(test)]
mod tests {
use super::Uptime;
use std::io;
#[test]
fn proc_uptime() {
let raw = "\
1640919.14 2328903.47
";
let _stat = Uptime::from_reader(io::Cursor::new(raw)).unwrap();
}
}