Update build.func

misc/build.func

@@ -1167,9 +1167,19 @@ EOF
 # }
 
 api_exit_script() {
-  exit_code=$? # Capture the exit status of the last executed command
-  #200 exit codes indicate error in create_lxc.sh
-  #100 exit codes indicate error in install.func
+  exit_code=$?
+
+  # Fallback
+  CT_TYPE="${CT_TYPE:-1}"
+  DISK_SIZE="${DISK_SIZE:-0}"
+  CORE_COUNT="${CORE_COUNT:-1}"
+  RAM_SIZE="${RAM_SIZE:-512}"
+  NSAPP="${NSAPP:-unknown}"
+  var_os="${var_os:-debian}"
+  var_version="${var_version:-12}"
+  METHOD="${METHOD:-unknown}"
+  DISABLEIP6="${DISABLEIP6:-no}"
+  RANDOM_UUID="${RANDOM_UUID:-$(cat /proc/sys/kernel/random/uuid)}"
 
   if [ $exit_code -ne 0 ]; then
     case $exit_code in