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|
use std::path::PathBuf;
use sysinfo::ProcessStatus;
#[cfg(target_os = "linux")]
use crate::utils::error;
#[cfg(target_os = "linux")]
use std::{
collections::{hash_map::RandomState, HashMap},
process::Command,
};
#[cfg(not(target_os = "linux"))]
use sysinfo::{ProcessExt, ProcessorExt, System, SystemExt};
// TODO: Add value so we know if it's sorted ascending or descending by default?
#[derive(Clone, PartialEq, Eq, Hash, Debug)]
pub enum ProcessSorting {
CpuPercent,
Mem,
MemPercent,
Pid,
ProcessName,
Command,
ReadPerSecond,
WritePerSecond,
TotalRead,
TotalWrite,
State,
}
impl std::fmt::Display for ProcessSorting {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
use ProcessSorting::*;
write!(
f,
"{}",
match &self {
CpuPercent => "CPU%",
MemPercent => "Mem%",
Mem => "Mem",
ReadPerSecond => "R/s",
WritePerSecond => "W/s",
TotalRead => "Read",
TotalWrite => "Write",
State => "State",
ProcessName => "Name",
Command => "Command",
Pid => "PID",
}
)
}
}
impl Default for ProcessSorting {
fn default() -> Self {
ProcessSorting::CpuPercent
}
}
#[derive(Debug, Clone, Default)]
pub struct ProcessHarvest {
pub pid: u32,
pub cpu_usage_percent: f64,
pub mem_usage_percent: f64,
pub name: String,
pub path: String,
pub read_bytes_per_sec: u64,
pub write_bytes_per_sec: u64,
pub total_read_bytes: u64,
pub total_write_bytes: u64,
pub process_state: String,
pub process_state_char: char,
}
#[derive(Debug, Default, Clone)]
pub struct PrevProcDetails {
pub total_read_bytes: u64,
pub total_write_bytes: u64,
pub cpu_time: f64,
pub proc_stat_path: PathBuf,
pub proc_exe_path: PathBuf,
pub proc_io_path: PathBuf,
}
impl PrevProcDetails {
pub fn new(pid: u32) -> Self {
let pid_string = pid.to_string();
PrevProcDetails {
proc_io_path: PathBuf::from(format!("/proc/{}/io", pid_string)),
proc_exe_path: PathBuf::from(format!("/proc/{}/exe", pid_string)),
proc_stat_path: PathBuf::from(format!("/proc/{}/stat", pid_string)),
..PrevProcDetails::default()
}
}
}
#[cfg(target_os = "linux")]
fn cpu_usage_calculation(
prev_idle: &mut f64, prev_non_idle: &mut f64,
) -> error::Result<(f64, f64)> {
// From SO answer: https://stackoverflow.com/a/23376195
let mut path = std::path::PathBuf::new();
path.push("/proc");
path.push("stat");
let stat_results = std::fs::read_to_string(path)?;
let first_line: &str;
let split_results = stat_results.split('\n').collect::<Vec<&str>>();
if split_results.is_empty() {
return Err(error::BottomError::InvalidIO(format!(
"Unable to properly split the stat results; saw {} values, expected at least 1 value.",
split_results.len()
)));
} else {
first_line = split_results[0];
}
let val = first_line.split_whitespace().collect::<Vec<&str>>();
// SC in case that the parsing will fail due to length:
if val.len() <= 10 {
return Err(error::BottomError::InvalidIO(format!(
"CPU parsing will fail due to too short of a return value; saw {} values, expected 10 values.",
val.len()
)));
}
let user: f64 = val[1].parse::<_>().unwrap_or(0_f64);
let nice: f64 = val[2].parse::<_>().unwrap_or(0_f64);
let system: f64 = val[3].parse::<_>().unwrap_or(0_f64);
let idle: f64 = val[4].parse::<_>().unwrap_or(0_f64);
let iowait: f64 = val[5].parse::<_>().unwrap_or(0_f64);
let irq: f64 = val[6].parse::<_>().unwrap_or(0_f64);
let softirq: f64 = val[7].parse::<_>().unwrap_or(0_f64);
let steal: f64 = val[8].parse::<_>().unwrap_or(0_f64);
let guest: f64 = val[9].parse::<_>().unwrap_or(0_f64);
let idle = idle + iowait;
let non_idle = user + nice + system + irq + softirq + steal + guest;
let total = idle + non_idle;
let prev_total = *prev_idle + *prev_non_idle;
let total_delta: f64 = total - prev_total;
let idle_delta: f64 = idle - *prev_idle;
*prev_idle = idle;
*prev_non_idle = non_idle;
let result = if total_delta - idle_delta != 0_f64 {
total_delta - idle_delta
} else {
1_f64
};
let cpu_percentage = if total_delta != 0_f64 {
result / total_delta
} else {
0_f64
};
Ok((result, cpu_percentage))
}
#[cfg(target_os = "linux")]
fn get_process_io(path: &PathBuf) -> std::io::Result<String> {
Ok(std::fs::read_to_string(path)?)
}
#[cfg(target_os = "linux")]
fn get_linux_process_io_usage(io_stats: &[&str]) -> (u64, u64) {
// Represents read_bytes and write_bytes
(
io_stats[9].parse::<u64>().unwrap_or(0),
io_stats[11].parse::<u64>().unwrap_or(0),
)
}
#[cfg(target_os = "linux")]
fn get_process_stats(path: &PathBuf) -> std::io::Result<String> {
Ok(std::fs::read_to_string(path)?)
}
#[cfg(target_os = "linux")]
fn get_linux_process_state(proc_stats: &[&str]) -> (char, String) {
if let Some(first_char) = proc_stats[2].chars().collect::<Vec<char>>().first() {
(
*first_char,
ProcessStatus::from(*first_char).to_string().to_string(),
)
} else {
('?', String::default())
}
}
/// Note that cpu_fraction should be represented WITHOUT the x100 factor!
#[cfg(target_os = "linux")]
fn get_linux_cpu_usage(
proc_stats: &[&str], cpu_usage: f64, cpu_fraction: f64, before_proc_val: f64,
use_current_cpu_total: bool,
) -> std::io::Result<(f64, f64)> {
fn get_process_cpu_stats(stats: &[&str]) -> f64 {
// utime + stime (matches top)
stats[13].parse::<f64>().unwrap_or(0_f64) + stats[14].parse::<f64>().unwrap_or(0_f64)
}
// Based heavily on https://stackoverflow.com/a/23376195 and https://stackoverflow.com/a/1424556
let after_proc_val = get_process_cpu_stats(&proc_stats);
if cpu_usage == 0.0 {
Ok((0_f64, after_proc_val))
} else if use_current_cpu_total {
Ok((
(after_proc_val - before_proc_val) / cpu_usage *
|