From 05653a9189dc04991765409e780847e45b4e5f68 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Fri, 3 Jan 2020 02:04:51 +0100
Subject: [PATCH] Kernel: killpg() with pgrp=0 should signal every process in
 the group

In the same group as the calling process, that is.
---
 Kernel/Process.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Kernel/Process.cpp b/Kernel/Process.cpp
index 8c194fdd7e..cd7f62c0d4 100644
--- a/Kernel/Process.cpp
+++ b/Kernel/Process.cpp
@@ -1681,7 +1681,8 @@ int Process::sys$killpg(int pgrp, int signum)
         return -EINVAL;
 
     InterruptDisabler disabler;
-
+    if (pgrp == 0)
+        return do_killpg(m_pgid, signum);
     return do_killpg(pgrp, signum);
 }