wip: starter and reaper works

src/init/daemon/starter.rs

@@ -0,0 +1,36 @@
+use tokio::task::JoinSet;
+use tokio::process::Command;
+use std::error;
+
+pub fn start_process(ts: &mut JoinSet<Result<(), Box<dyn error::Error + Send + Sync>>>) {
+    for _j in 0..5 {
+        ts.spawn(async move {
+            for _i in 0..5 {
+                let mut child = Command::new("sleep").arg("1")
+                    .spawn()
+                    .expect("failed to spawn");
+
+                match child.wait().await {
+                    Ok(status) => {
+                        println!("starter: sleep exited: {}", status);
+                    },
+                    Err(e) => {
+                        if let Some(eos) = e.raw_os_error() {
+                            if eos != nix::Error::ECHILD as i32 {
+                                return Err(e.into());
+                            }
+                        } else {
+                            return Err(e.into());
+                        }
+                    },
+                }
+                // let status = child.wait().await?;
+                // println!("starter: sleep exited: {}", status);
+            }
+            println!("starter: task completed");
+            Ok(())
+        });
+
+    }
+    println!("starter: spawning completed");
+}