Update vm-core.func

misc/vm-core.func

@@ -27,6 +27,8 @@ load_functions() {
   pve_check
   arch_check
   ssh_check
+  check_hostname_conflict
+  set_std_mode
   # add more
 }
 
@@ -440,6 +442,13 @@ exit_script() {
   exit
 }
 
+check_hostname_conflict() {
+  if qm list | awk '{print $2}' | grep -qx "$HN"; then
+    msg_error "Hostname $HN already in use by another VM."
+    exit 1
+  fi
+}
+
 set_description() {
   DESCRIPTION=$(
     cat <<EOF