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use crate::{Error, Result};
use std::str::FromStr;
#[derive(Debug)]
pub struct LoadAvg {
one: f32,
five: f32,
fifteen: f32,
cur_num: usize,
total_num: usize,
last_pid: usize,
}
impl LoadAvg {
getter_gen! {
one: f32,
five: f32,
fifteen: f32,
cur_num: usize,
total_num: usize,
last_pid: usize
}
}
impl FromStr for LoadAvg {
type Err = Error;
fn from_str(value: &str) -> Result<Self> {
let mut column_iter = value.trim().split_ascii_whitespace();
let one = column_iter.next().ok_or(Error::BadFormat)?.parse::<f32>()?;
let five = column_iter.next().ok_or(Error::BadFormat)?.parse::<f32>()?;
let fifteen = column_iter.next().ok_or(Error::BadFormat)?.parse::<f32>()?;
let pnum: Vec<&str> = column_iter
.next()
.ok_or(Error::BadFormat)?
.split('/')
.collect();
let cur_num = pnum.get(0).ok_or(Error::BadFormat)?.parse::<usize>()?;
let total_num = pnum.get(1).ok_or(Error::BadFormat)?.parse::<usize>()?;
let last_pid = column_iter
.next()
.ok_or(Error::BadFormat)?
.parse::<usize>()?;
Ok(LoadAvg {
one,
five,
fifteen,
cur_num,
total_num,
last_pid,
})
}
}
pub fn loadavg() -> Result<LoadAvg> {
let content = std::fs::read_to_string("/proc/loadavg")?;
LoadAvg::from_str(&content)
}