1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
use std::error;
use std::fs::remove_file;
use std::io::{Read,Write};
use std::os::unix::net::{UnixStream,UnixListener};
use std::str;
use std::sync::{Arc,Mutex};
use std::thread::{sleep,spawn};
use std::time::{Duration,Instant,SystemTime};
use clap::Parser;
use serde::{Serialize,Deserialize};
#[derive(Parser)]
struct Cli {
#[arg(short='d', long)]
daemon: bool,
#[arg(short='v', long)]
verbose: bool,
#[arg(short='D', long, default_value="10")]
delay: u64,
#[arg(short='s', long, default_value="varanus.sock")]
socket: String,
}
#[derive(Debug, Serialize, Deserialize)]
struct Battery {
}
#[derive(Debug, Serialize, Deserialize)]
struct Power {
}
impl Power {
fn new() -> Self {
return Power{}
}
}
#[derive(Debug, Serialize, Deserialize)]
struct Process {
}
#[derive(Debug, Serialize, Deserialize)]
struct Memory {
}
impl Memory {
fn new() -> Self {
return Memory{}
}
}
#[derive(Debug, Serialize, Deserialize)]
struct State {
asof: SystemTime,
power: Power,
memory: Memory,
}
impl State {
fn new() -> Self {
let asof = SystemTime::now();
return State {
asof: asof,
power: Power::new(),
memory: Memory::new()
}
}
fn update(&mut self) {
self.asof = SystemTime::now();
}
}
type Result<T> = std::result::Result<T, Box<dyn error::Error>>;
fn update_state(state: &mut State) {
state.update();
}
fn get_state(sockfile: String) -> Result<State> {
let mut socket = UnixStream::connect(sockfile)?;
let mut buf = vec![];
socket.read_to_end(&mut buf)?;
Ok(serde_json::from_str::<State>(str::from_utf8(&buf)?)?)
}
fn main() {
let args = Cli::parse();
if args.daemon {
let start = Instant::now();
let delay_ms: u64 = args.delay * 1000;
let mut cycle: u64 = 0;
let state_mutex = Arc::new(Mutex::new(State::new()));
let listen_thread = {
let state_mutex = Arc::clone(&state_mutex);
spawn(move || {
let _ = remove_file(&args.socket);
let listener = UnixListener::bind(args.socket).unwrap();
loop {
match listener.accept() {
Ok((mut socket,accept)) => {
let json = {
let state = state_mutex.lock().unwrap();
serde_json::to_string(&*state).unwrap()
};
socket.write_all(json.as_bytes()).unwrap();
},
Err(e) => println!("error: {:?}", e)
}
}
});
};
loop {
if args.verbose {
println!("{:?} elapsed; updating state...", start.elapsed());
}
{
let mut state = state_mutex.lock().unwrap();
update_state(&mut state);
}
cycle += 1;
sleep(Duration::from_millis(cycle*delay_ms) - start.elapsed());
}
} else {
let state = get_state(args.socket).unwrap();
println!("{:#?}", state)
}
}
|
