From b4f3fd8a255d03bb4fe49d1c03f81fc0c59ab40e Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <m@mitchellh.com>
Date: Fri, 24 Jan 2025 10:14:25 -0800
Subject: [PATCH] process: call `waitpid` for kqueue to match pidfd behavior

---
 src/watcher/process.zig | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/watcher/process.zig b/src/watcher/process.zig
index 8112a50..eb4f39a 100644
--- a/src/watcher/process.zig
+++ b/src/watcher/process.zig
@@ -189,6 +189,12 @@ fn ProcessKqueue(comptime xev: type) type {
                         c_inner: *xev.Completion,
                         r: xev.Result,
                     ) xev.CallbackAction {
+                        // Reap the process. We do this because our xev.Process
+                        // docs note that this is the equivalent of calling
+                        // `wait` on a process. The Linux side (pidfd) does this
+                        // automatically since the `waitid` syscall is used.
+                        _ = posix.waitpid(c_inner.op.proc.pid, 0);
+
                         return @call(.always_inline, cb, .{
                             common.userdataValue(Userdata, ud),
                             l_inner,