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//! Process data collection for macOS. Uses sysinfo and custom bindings.
mod sysctl_bindings;
use std::{io, process::Command};
use hashbrown::HashMap;
use itertools::Itertools;
use sysinfo::{PidExt, ProcessExt};
use super::UnixProcessExt;
use crate::Pid;
pub(crate) struct MacOSProcessExt;
impl UnixProcessExt for MacOSProcessExt {
#[inline]
fn has_backup_proc_cpu_fn() -> bool {
true
}
fn backup_proc_cpu(pids: &[Pid]) -> io::Result<HashMap<Pid, f64>> {
let output = Command::new("ps")
.args(["-o", "pid=,pcpu=", "-p"])
.arg(
// Has to look like this since otherwise, it you hit a `unstable_name_collisions` warning.
Itertools::intersperse(pids.iter().map(i32::to_string), ",".to_string())
.collect::<String>(),
)
.output()?;
let mut result = HashMap::new();
String::from_utf8_lossy(&output.stdout)
.split_whitespace()
.chunks(2)
.into_iter()
.for_each(|chunk| {
let chunk: Vec<&str> = chunk.collect();
if chunk.len() != 2 {
panic!("Unexpected `ps` output");
}
let pid = chunk[0].parse();
let usage = chunk[1].parse();
if let (Ok(pid), Ok(usage)) = (pid, usage) {
result.insert(pid, usage);
}
});
Ok(result)
}
fn parent_pid(process_val: &sysinfo::Process) -> Option<Pid> {
process_val
.parent()
.map(|p| p.as_u32() as _)
.or_else(|| fallback_macos_ppid(process_val.pid().as_u32() as _))
}
}
fn fallback_macos_ppid(pid: Pid) -> Option<Pid> {
sysctl_bindings::kinfo_process(pid)
.map(|kinfo| kinfo.kp_eproc.e_ppid)
.ok()
}
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