From fa900b0694ffc8b835b91ef47a96ed90ac94823b Mon Sep 17 00:00:00 2001
From: zlice <zlice555@gmail.com>
Date: Sun, 6 Jul 2025 13:58:28 -0400
Subject: [PATCH] Process: kill then WAIT for child, in reverse. fixes #777

---
 src/Utils/Process.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/Utils/Process.cpp b/src/Utils/Process.cpp
index 9e3f7584c8..12085abcaa 100644
--- a/src/Utils/Process.cpp
+++ b/src/Utils/Process.cpp
@@ -100,18 +100,21 @@ namespace gamescope::Process
 
     void KillProcessTree( std::vector<pid_t> nPids, int nSignal )
     {
-        for ( pid_t nPid : nPids )
+        pid_t nPid = 0;
+        int sz = nPids.size() - 1;
+        while (sz >= 0)
         {
-            auto nChildPids = GetChildPids( nPid );
+            nPid = nPids[sz--];
             KillProcess( nPid, nSignal );
-            KillProcessTree( nChildPids, nSignal );
+            WaitForChild( nPid );
         }
     }
 
+
     void KillAllChildren( pid_t nParentPid, int nSignal )
     {
         std::vector<pid_t> nChildPids = GetChildPids( nParentPid );
-        return KillProcessTree( nChildPids, nSignal );
+        KillProcessTree( nChildPids, nSignal );
     }
 
     void KillProcess( pid_t nPid, int nSignal )