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//! Process data collection for FreeBSD. Uses sysinfo.
use std::io;
use std::process::Command;
use hashbrown::HashMap;
use serde::{Deserialize, Deserializer};
use crate::data_harvester::{deserialize_xo, processes::UnixProcessExt};
use crate::Pid;
#[derive(Deserialize, Debug, Default)]
#[serde(rename_all = "kebab-case")]
struct ProcessInformation {
process: Vec<ProcessRow>,
}
#[derive(Deserialize, Debug)]
#[serde(rename_all = "kebab-case")]
struct ProcessRow {
#[serde(deserialize_with = "pid")]
pid: i32,
#[serde(deserialize_with = "percent_cpu")]
percent_cpu: f64,
}
pub(crate) struct FreeBSDProcessExt;
impl UnixProcessExt for FreeBSDProcessExt {
#[inline]
fn has_backup_proc_cpu_fn() -> bool {
true
}
fn backup_proc_cpu(pids: &[Pid]) -> io::Result<HashMap<Pid, f64>> {
if pids.is_empty() {
return Ok(HashMap::new());
}
let output = Command::new("ps")
.args(["--libxo", "json", "-o", "pid,pcpu", "-p"])
.args(pids.iter().map(i32::to_string))
.output()?;
deserialize_xo("process-information", &output.stdout).map(
|process_info: ProcessInformation| {
process_info
.process
.into_iter()
.map(|row| (row.pid, row.percent_cpu))
.collect()
},
)
}
}
fn pid<'de, D>(deserializer: D) -> Result<i32, D::Error>
where
D: Deserializer<'de>,
{
let s = String::deserialize(deserializer)?;
s.parse().map_err(serde::de::Error::custom)
}
fn percent_cpu<'de, D>(deserializer: D) -> Result<f64, D::Error>
where
D: Deserializer<'de>,
{
let s = String::deserialize(deserializer)?;
s.parse().map_err(serde::de::Error::custom)
}
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