use std::fmt::{self, Debug, Formatter};
use std::path::{Path, PathBuf};
use libc::{c_int, gid_t, kill, uid_t};
use Pid;
use ProcessExt;
#[derive(Clone, Copy, Debug)]
pub enum ProcessStatus {
Idle,
Run,
Sleep,
Stop,
Zombie,
Unknown(u32),
}
impl From<u32> for ProcessStatus {
fn from(status: u32) -> ProcessStatus {
match status {
1 => ProcessStatus::Idle,
2 => ProcessStatus::Run,
3 => ProcessStatus::Sleep,
4 => ProcessStatus::Stop,
5 => ProcessStatus::Zombie,
x => ProcessStatus::Unknown(x),
}
}
}
impl ProcessStatus {
pub fn to_string(&self) -> &str {
match *self {
ProcessStatus::Idle => "Idle",
ProcessStatus::Run => "Runnable",
ProcessStatus::Sleep => "Sleeping",
ProcessStatus::Stop => "Stopped",
ProcessStatus::Zombie => "Zombie",
ProcessStatus::Unknown(_) => "Unknown",
}
}
}
impl fmt::Display for ProcessStatus {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.to_string())
}
}
#[derive(Clone, Debug)]
pub enum ThreadStatus {
Running,
Stopped,
Waiting,
Uninterruptible,
Halted,
Unknown(i32),
}
impl From<i32> for ThreadStatus {
fn from(status: i32) -> ThreadStatus {
match status {
1 => ThreadStatus::Running,
2 => ThreadStatus::Stopped,
3 => ThreadStatus::Waiting,
4 => ThreadStatus::Uninterruptible,
5 => ThreadStatus::Halted,
x => ThreadStatus::Unknown(x),
}
}
}
impl ThreadStatus {
pub fn to_string(&self) -> &str {
match *self {
ThreadStatus::Running => "Running",
ThreadStatus::Stopped => "Stopped",
ThreadStatus::Waiting => "Waiting",
ThreadStatus::Uninterruptible => "Uninterruptible",
ThreadStatus::Halted => "Halted",
ThreadStatus::Unknown(_) => "Unknown",
}
}
}
impl fmt::Display for ThreadStatus {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.to_string())
}
}
#[derive(Clone)]
pub struct Process {
pub(crate) name: String,
pub(crate) cmd: Vec<String>,
pub(crate) exe: PathBuf,
pid: Pid,
parent: Option<Pid>,
pub(crate) environ: Vec<String>,
cwd: PathBuf,
pub(crate) root: PathBuf,
pub(crate) memory: u64,
pub(crate) virtual_memory: u64,
utime: u64,
stime: u64,
old_utime: u64,
old_stime: u64,
start_time: u64,
updated: bool,
cpu_usage: f32,
pub uid: uid_t,
pub gid: gid_t,
pub(crate) process_status: ProcessStatus,
pub status: Option<ThreadStatus>,
}
impl ProcessExt for Process {
fn new(pid: Pid, parent: Option<Pid>, start_time: u64) -> Process {
Process {
name: String::new(),
pid,
parent,
cmd: Vec::new(),
environ: Vec::new(),
exe: PathBuf::new(),
cwd: PathBuf::new(),
root: PathBuf::new(),
memory: 0,
virtual_memory: 0,
cpu_usage: 0.,
utime: 0,
stime: 0,
old_utime: 0,
old_stime: 0,
updated: true,
start_time,
uid: 0,
gid: 0,
process_status: ProcessStatus::Unknown(0),
status: None,
}
}
fn kill(&self, signal: ::Signal) -> bool {
unsafe { kill(self.pid, signal as c_int) == 0 }
}
fn name(&self) -> &str {
&self.name
}
fn cmd(&self) -> &[String] {
&self.cmd
}
fn exe(&self) -> &Path {
self.exe.as_path()
}
fn pid(&self) -> Pid {
self.pid
}
fn environ(&self) -> &[String] {
&self.environ
}
fn cwd(&self) -> &Path {
self.cwd.as_path()
}
fn root(&self) -> &Path {
self.root.as_path()
}
fn memory(&self) -> u64 {
self.memory
}
fn virtual_memory(&self) -> u64 {
self.virtual_memory
}
fn parent(&self) -> Option<Pid> {
self.parent
}
fn status(&self) -> ProcessStatus {
self.process_status
}
fn start_time(&self) -> u64 {
self.start_time
}
fn cpu_usage(&self) -> f32 {
self.cpu_usage
}
}
#[allow(unused_must_use)]
impl Debug for Process {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
writeln!(f, "pid: {}", self.pid);
writeln!(f, "parent: {:?}", self.parent);
writeln!(f, "name: {}", self.name);
writeln!(f, "environment:");
for var in &self.environ {
if !var.is_empty() {
writeln!(f, "\t{}", var);
}
}
writeln!(f, "command:");
for arg in &self.cmd {
writeln!(f, "\t{}", arg);
}
writeln!(f, "executable path: {:?}", self.exe);
writeln!(f, "current working directory: {:?}", self.cwd);
writeln!(f, "owner/group: {}:{}", self.uid, self.gid);
writeln!(f, "memory usage: {} kB", self.memory);
writeln!(f, "virtual memory usage: {} kB", self.virtual_memory);
writeln!(f, "cpu usage: {}%", self.cpu_usage);
writeln!(
f,
"status: {}",
match self.status {
Some(ref v) => v.to_string(),
None => "Unknown",
}
);
write!(f, "root path: {:?}", self.root)
}
}
pub fn compute_cpu_usage(p: &mut Process, time: u64, task_time: u64) {
let system_time_delta = task_time - p.old_utime;
let time_delta = time - p.old_stime;
p.old_utime = task_time;
p.old_stime = time;
p.cpu_usage = if time_delta == 0 {
0f32
} else {
(system_time_delta as f64 * 100f64 / time_delta as f64) as f32
};
p.updated = true;
}
pub fn has_been_updated(p: &mut Process) -> bool {
let old = p.updated;
p.updated = false;
old
}
pub fn force_update(p: &mut Process) {
p.updated = true;
}