From accab5dd878337cd4faea343ace6466bcdf1a37f Mon Sep 17 00:00:00 2001
From: ptrcnull <git@ptrcnull.me>
Date: Wed, 29 Dec 2021 06:07:28 +0100
Subject: [PATCH] fix: Add more reliable method of killing stale processes

---
 infect.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/infect.sh b/infect.sh
index c0295fa..91c8196 100755
--- a/infect.sh
+++ b/infect.sh
@@ -91,7 +91,13 @@ echo '#!/bin/ash
 rm third_stage.sh
 
 # kill all remaining processes
-lsof | grep old_root | awk "{print \$1}" | uniq | xargs kill -9 2>/dev/null
+cd /proc
+ps ax | awk "{print \$1}" | tail -n +3 | while read pid; do
+  if grep -qE "^/dev/\w+ / " /proc/$pid/mounts; then
+    kill -9 $pid
+  fi
+done
+cd /
 
 /bin/umount -Rl old_root/* 2>/dev/null
 /bin/umount old_root