From e6e9786c6a714cb79c2f44795fb65633639609fe Mon Sep 17 00:00:00 2001
From: My Spaghetti <31696646+myspaghetti@users.noreply.github.com>
Date: Fri, 10 Jul 2020 10:17:34 +0300
Subject: [PATCH] added minor sanity check

---
 macos-guest-virtualbox.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/macos-guest-virtualbox.sh b/macos-guest-virtualbox.sh
index 8ffb62c..7cd5e9f 100755
--- a/macos-guest-virtualbox.sh
+++ b/macos-guest-virtualbox.sh
@@ -2,7 +2,7 @@
 # Push-button installer of macOS on VirtualBox
 # (c) myspaghetti, licensed under GPL2.0 or higher
 # url: https://github.com/myspaghetti/macos-virtualbox
-# version 0.94.3
+# version 0.94.4
 
 # Dependencies: bash  coreutils  gzip  unzip  wget  xxd  dmg2img
 # Supported versions:
@@ -945,6 +945,7 @@ cycle_through_terminal_windows
 # the other script copies files to EFI system partition,
 # then sends SIGUSR1 to the installer which restarts the virtual machine
 kbstring='background_pid="$(ps | grep '"'"' sh$'"'"' | cut -d '"'"' '"'"' -f 3)" && '\
+'[[ "${background_pid}" =~ ^[0-9][0-9]*$ ]] && '\
 'app_path="$(ls -d /Install*.app)" && '\
 'cd "/${app_path}/Contents/Resources/" && '\
 './startosinstall --agreetolicense --pidtosignal ${background_pid} --rebootdelay 500 --volume "/Volumes/'"${vm_name}"'"'