From 15501132916dfbc24f23b619e6d5408f258fc0d9 Mon Sep 17 00:00:00 2001
From: Jonas Maier <>
Date: Wed, 11 Mar 2026 12:30:07 +0100
Subject: can wait for threads & processes with a timeout now

---
 src/run/mod.rs | 41 +++++++++++++++++++++++++++++++----------
 1 file changed, 31 insertions(+), 10 deletions(-)

(limited to 'src/run/mod.rs')

diff --git a/src/run/mod.rs b/src/run/mod.rs
index 5666574..6af1717 100644
--- a/src/run/mod.rs
+++ b/src/run/mod.rs
@@ -2,11 +2,11 @@ use std::collections::HashMap;
 use std::fs::File;
 use std::io::{PipeReader, PipeWriter};
 use std::path::PathBuf;
-use std::process::Child;
 use std::sync::{Arc, Mutex};
 use std::thread::JoinHandle;
 
 use crate::parse::{self, Ast, PostExpansion, PreExpansion};
+use crate::wait::{ChildWaiter, ThreadWaiter};
 use crate::*;
 
 mod builtin;
@@ -147,18 +147,24 @@ impl Write for Output {
 }
 
 enum SpawnedCmd {
-    Builtin(JoinHandle<Result<(), BuiltinError>>),
-    Fun(JoinHandle<Result<(), ExecError>>),
-    Child(Child),
+    Builtin(ThreadWaiter<Result<(), BuiltinError>>),
+    Fun(ThreadWaiter<Result<(), ExecError>>),
+    Child(ChildWaiter),
     SpawnError(io::Error),
+    Joined(Result<(), ExecError>),
 }
 
 impl SpawnedCmd {
     fn join(self) -> Result<(), ExecError> {
         match self {
-            SpawnedCmd::Builtin(handle) => handle.join().map_err(|_| ExecError::Panic)??,
-            SpawnedCmd::Fun(handle) => handle.join().map_err(|_| ExecError::Panic)??,
-            SpawnedCmd::Child(mut child) => {
+            SpawnedCmd::Builtin(handle) => {
+                handle.into_inner().join().map_err(|_| ExecError::Panic)??
+            }
+            SpawnedCmd::Fun(handle) => {
+                handle.into_inner().join().map_err(|_| ExecError::Panic)??
+            }
+            SpawnedCmd::Child(child) => {
+                let mut child = child.into_inner();
                 let exit_code = child.wait()?;
                 match exit_code.code() {
                     Some(0) => (),
@@ -167,9 +173,24 @@ impl SpawnedCmd {
                 }
             }
             SpawnedCmd::SpawnError(err) => Err(err)?,
+            SpawnedCmd::Joined(res) => res?,
         }
         Ok(())
     }
+
+    /// returns whether the spawned command is already joined
+    fn join_timeout(&mut self, timeout_ms: u16) -> bool {
+        match self {
+            SpawnedCmd::Builtin(tw) => tw.try_join(timeout_ms),
+            SpawnedCmd::Fun(tw) => tw.try_join(timeout_ms),
+            SpawnedCmd::Child(child) => match child.wait(timeout_ms) {
+                Ok(None) => false,
+                _ => true,
+            },
+            SpawnedCmd::SpawnError(_) => true,
+            SpawnedCmd::Joined(_) => true,
+        }
+    }
 }
 
 impl Executor {
@@ -192,7 +213,7 @@ impl Executor {
             CommandKind::Builtin(builtin) => {
                 builtin.special(self.se.clone(), &args[1..]);
                 let cloned_session = self.se.clone();
-                let handle = std::thread::spawn(move || {
+                let handle = wait::spawn(move || {
                     builtin.io(cloned_session, &args[1..], &mut stdin, &mut stdout)
                 });
                 SpawnedCmd::Builtin(handle)
@@ -201,7 +222,7 @@ impl Executor {
                 let mut this = self.clone();
                 this.args = Some(args);
 
-                let handle = std::thread::spawn(move || {
+                let handle = wait::spawn(move || {
                     let ast = ast.expand(&mut this)?;
                     this.execute(ast, stdin, stdout)?;
                     Ok(())
@@ -221,7 +242,7 @@ impl Executor {
                 crate::export_fun::prepare_command(self.se.clone(), &mut command);
 
                 match command.spawn() {
-                    Ok(c) => SpawnedCmd::Child(c),
+                    Ok(c) => SpawnedCmd::Child(ChildWaiter::new(c).unwrap()),
                     Err(e) => SpawnedCmd::SpawnError(e),
                 }
             }
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