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use crate::unitd_cmd::UnitdCmd;
use crate::unitd_docker::{pid_is_dockerized, UnitdContainer};
use crate::unitd_instance::UNITD_BINARY_NAMES;
use crate::unitd_process_user::UnitdProcessUser;
use serde::ser::SerializeMap;
use serde::{Serialize, Serializer};
use std::collections::HashMap;
use std::path::Path;
use sysinfo::{Pid, Process, ProcessRefreshKind, System, UpdateKind, Users};
#[derive(Debug, Clone)]
pub struct UnitdProcess {
pub binary_name: String,
pub process_id: u64,
pub executable_path: Option<Box<Path>>,
pub environ: Vec<String>,
pub all_cmds: Vec<String>,
pub working_dir: Option<Box<Path>>,
pub child_pids: Vec<u64>,
pub user: Option<UnitdProcessUser>,
pub effective_user: Option<UnitdProcessUser>,
pub container: Option<UnitdContainer>,
}
impl Serialize for UnitdProcess {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
// 6 = fields to serialize
let mut state = serializer.serialize_map(Some(6))?;
state.serialize_entry("pid", &self.process_id)?;
state.serialize_entry("user", &self.user)?;
state.serialize_entry("effective_user", &self.effective_user)?;
state.serialize_entry("executable", &self.executable_path())?;
state.serialize_entry("child_pids", &self.child_pids)?;
state.serialize_entry("container", &self.container)?;
state.end()
}
}
impl UnitdProcess {
pub fn find_unitd_processes() -> Vec<UnitdProcess> {
let process_refresh_kind = ProcessRefreshKind::new()
.with_cmd(UpdateKind::Always)
.with_cwd(UpdateKind::Always)
.with_exe(UpdateKind::Always)
.with_user(UpdateKind::Always);
let refresh_kind = sysinfo::RefreshKind::new().with_processes(process_refresh_kind);
let sys = System::new_with_specifics(refresh_kind);
let unitd_processes: HashMap<&Pid, &Process> = sys
.processes()
.iter()
.filter(|p| {
let process_name = p.1.name();
UNITD_BINARY_NAMES.contains(&process_name)
})
.collect::<HashMap<&Pid, &Process>>();
let users = Users::new_with_refreshed_list();
unitd_processes
.iter()
// Filter out child processes
.filter(|p| {
#[cfg(target_os = "linux")]
if pid_is_dockerized(p.0.as_u32().into()) {
return false;
}
let parent_pid = p.1.parent();
match parent_pid {
Some(pid) => !unitd_processes.contains_key(&pid),
None => false,
}
})
.map(|p| {
let tuple = p.to_owned();
/* The sysinfo library only supports 32-bit pids, yet larger values are possible
* if the OS is configured to support it, thus we use 64-bit integers internally
* because it is just a matter of time until the library changes to larger values. */
let pid = *tuple.0;
let process = *tuple.1;
let process_id: u64 = pid.as_u32().into();
let executable_path: Option<Box<Path>> = process.exe().map(|p| p.to_path_buf().into_boxed_path());
let environ: Vec<String> = process.environ().into();
let cmd: Vec<String> = process.cmd().into();
let working_dir: Option<Box<Path>> = process.cwd().map(|p| p.to_path_buf().into_boxed_path());
let child_pids = unitd_processes
.iter()
.filter_map(|p| p.to_owned().1.parent())
.filter(|parent_pid| parent_pid == pid)
.map(|p| p.as_u32() as u64)
.collect::<Vec<u64>>();
let user = process
.user_id()
.and_then(|uid| users.get_user_by_id(uid))
.map(UnitdProcessUser::from);
let effective_user = process
.effective_user_id()
.and_then(|uid| users.get_user_by_id(uid))
.map(UnitdProcessUser::from);
UnitdProcess {
binary_name: process.name().to_string(),
process_id,
executable_path,
environ,
all_cmds: cmd,
working_dir,
child_pids,
user,
effective_user,
container: None,
}
})
.collect::<Vec<UnitdProcess>>()
}
pub fn cmd(&self) -> Option<UnitdCmd> {
if self.all_cmds.is_empty() {
return None;
}
match UnitdCmd::new(self.all_cmds[0].clone(), self.binary_name.as_ref()) {
Ok(cmd) => Some(cmd),
Err(error) => {
eprintln!("Failed to parse process cmd: {}", error);
None
}
}
}
pub fn executable_path(&self) -> Option<Box<Path>> {
if self.executable_path.is_some() {
return self.executable_path.clone();
}
self.cmd().and_then(|cmd| cmd.process_executable_path)
}
}
#[cfg(test)]
mod tests {
use super::*;
fn can_parse_runtime_cmd_absolute_path(binary_name: &str) {
let cmd = format!(
"unit: main v1.28.0 [/usr/sbin/{} --log /var/log/unit.log --pid /var/run/unit.pid]",
binary_name
);
let unitd_cmd = UnitdCmd::new(cmd, binary_name).expect("Failed to parse unitd cmd");
assert_eq!(unitd_cmd.version.unwrap(), "1.28.0");
assert_eq!(
unitd_cmd.process_executable_path.unwrap().to_string_lossy(),
format!("/usr/sbin/{}", binary_name)
);
let flags = unitd_cmd.flags.unwrap();
assert_eq!(flags.get_flag_value("log").unwrap(), "/var/log/unit.log");
assert_eq!(flags.get_flag_value("pid").unwrap(), "/var/run/unit.pid");
}
fn can_parse_runtime_cmd_relative_path(binary_name: &str) {
let cmd = format!(
"unit: main v1.29.0 [./sbin/{} --no-daemon --tmp /tmp --something]",
binary_name
);
let unitd_cmd = UnitdCmd::new(cmd, binary_name).expect("Failed to parse unitd cmd");
assert_eq!(unitd_cmd.version.unwrap(), "1.29.0");
assert_eq!(
unitd_cmd.process_executable_path.unwrap().to_string_lossy(),
format!("./sbin/{}", binary_name)
);
let flags = unitd_cmd.flags.unwrap();
assert_eq!(flags.get_flag_value("tmp").unwrap(), "/tmp");
assert!(flags.has_flag("something"));
}
#[test]
fn can_parse_runtime_cmd_unitd_absolute_path() {
can_parse_runtime_cmd_absolute_path("unitd");
}
#[test]
fn can_parse_runtime_cmd_unitd_debug_absolute_path() {
can_parse_runtime_cmd_absolute_path("unitd-debug");
}
#[test]
fn can_parse_runtime_cmd_unitd_relative_path() {
can_parse_runtime_cmd_relative_path("unitd");
}
#[test]
fn can_parse_runtime_cmd_unitd_debug_relative_path() {
can_parse_runtime_cmd_relative_path("unitd-debug");
}
}
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