procshot_server 
A lame attempt of a rust crate (refer this for crate documentation) to record /proc stats periodically. This library just records the stats. Processing to be done separately. This is written as a part of learning rust.
Server example
use procshot_server::{Config, check_sudo, scan_proc};
use std::process;
use users::get_current_uid;
use procshot_client;
const DATADIR: &'static str = "/var/log/procshot/data";
fn main() {
match check_sudo(get_current_uid()) {
Err(e) => {
eprintln!("Error encountered checking privileges, {:?}", e);
process::exit(1);
},
_ => (),
}
std::fs::create_dir_all(DATADIR).unwrap();
let config: Config = Config::new();
match config.server{
true => scan_proc(config.delay, config.hostname, DATADIR),
false => procshot_client::read_test_data(),
}
}This will generate a binary with the following cli options
procshot 1.0
[email protected]
Snapshots proc periodically. All the options except delay works when 'server' option is not used.
USAGE:
procshot [FLAGS] [OPTIONS] [SUBCOMMAND]
FLAGS:
-h, --help Prints help information
-o Sort result by Memory or CPU. Accepted values are...
-t Read stats from a specific time. Accepted format: 2015-09-05 23:56:04
-V, --version Prints version information
OPTIONS:
-d, --delay <delay> Sets delay in seconds before it scans /proc every time. Defaults to 60 seconds. [default: 60]
SUBCOMMANDS:
help Prints this message or the help of the given subcommand(s)
server Decides whether to run as server or clientClient example on how to read the stored data
use std::fs::File;
use std::io::Read;
use procshot_server::EncoDecode;
pub fn read_test_data() {
let mut file = File::open("./test_data.procshot").unwrap();
let mut data = Vec::new();
file.read_to_end(&mut data).unwrap();
let decoded: EncoDecode = bincode::deserialize(&data[..]).unwrap_or_else(|x| panic!("Error reading saved data. This was either created with an older version of procshot, or the file is corrupt. Error is {}", x));
println!("Decoded test file data: {:#?}", decoded);
}Sample output of stored data
$ sudo ./target/release/procshot
Decoded test file data: EncoDecode {
hostname: "localghost",
pid_map_list: {
169883: PidStatus {
ppid: 3284,
euid: 1000,
cmd_long: [
"/opt/google/chrome/chrome --type=renderer --field-trial-handle=11321657219978072658,9761930160602287450,131072 --lang=en-US --disable-client-side-phishing-detection --enable-auto-reload --num-raster-threads=4 --enable-main-frame-before-activation --service-request-channel-token=1438087544763584805 --renderer-client-id=214 --no-v8-untrusted-code-mitigations --shared-files=v8_context_snapshot_data:100,v8_natives_data:101",
],
name: "chrome",
cmd_short: "chrome",
tracerpid: 0,
fdsize: 64,
state: "S (sleeping)",
vmpeak: Some(
549888,
),
vmsize: Some(
525300,
),
rss_pages: 13139,
rss_bytes: 53817344,
rsslim_bytes: 18446744073709551615,
processor_last_executed: Some(
4,
),
utime: 5,
stime: 2,
user_cpu_usage: 0.0,
sys_cpu_usage: 0.0,
},
2078: PidStatus {
ppid: 1783,
euid: 1000,
cmd_long: [
"/usr/lib/at-spi2-registryd",
"--use-gnome-session",
],
name: "at-spi2-registr",
cmd_short: "at-spi2-registr",
tracerpid: 0,
fdsize: 64,
state: "S (sleeping)",
vmpeak: Some(
229136,
),
vmsize: Some(
163600,
),
rss_pages: 1472,
rss_bytes: 6029312,
rsslim_bytes: 18446744073709551615,
processor_last_executed: Some(
2,
),
utime: 1,
stime: 0,
user_cpu_usage: 0.0,
sys_cpu_usage: 0.0,
},
2130: PidStatus {
ppid: 1783,
euid: 1000,
cmd_long: [
"/usr/lib/gsd-screensaver-proxy",
],
name: "gsd-screensaver",
cmd_short: "gsd-screensaver",
tracerpid: 0,
fdsize: 64,
state: "S (sleeping)",
vmpeak: Some(
234084,
),
vmsize: Some(
234084,
),
rss_pages: 1094,
rss_bytes: 4481024,
rsslim_bytes: 18446744073709551615,
processor_last_executed: Some(
6,
),
utime: 1,
stime: 0,
user_cpu_usage: 0.0,
sys_cpu_usage: 0.0,
},
2112: PidStatus {
ppid: 1783,
euid: 1000,
cmd_long: [
"/usr/lib/gsd-housekeeping",
],
name: "gsd-housekeepin",
cmd_short: "gsd-housekeepin",
tracerpid: 0,
fdsize: 64,
state: "S (sleeping)",
vmpeak: Some(
375152,
),
vmsize: Some(
310204,
),
rss_pages: 1764,
rss_bytes: 7225344,
rsslim_bytes: 18446744073709551615,
processor_last_executed: Some(
10,
),
utime: 7,
stime: 7,
user_cpu_usage: 0.0,
sys_cpu_usage: 0.0,
},
..... snip .....
time_epoch: 1563617611,
delay: 5,
total_cpu_time: 6331606,
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