--- a/refind-install	2018-09-10 10:11:58.210756087 +0100
+++ b/refind-install	2018-09-10 19:31:00.916507826 +0100
@@ -27,6 +27,8 @@
 #           Valid only under Linux.
 #    "--keepname" to keep refind_x64.efi name as such even when using shim.
 #           Valid only under Linux.
+#    "--nvramonly" to just restore the boot entry in NVRAM.
+#           Valid only under Linux.
 #    "--yes" to assume a "yes" response to all prompts
 #
 # This program is copyright (c) 2012-2020 by Roderick W. Smith
@@ -155,6 +157,8 @@
               ;;
          --keepname) KeepName=1
               ;;
+         --nvramonly) NvramOnly=1
+              ;;
          --drivers | --alldrivers) InstallDrivers="all"
               ;;
          --nodrivers) InstallDrivers="none"
@@ -164,7 +168,7 @@
          * ) echo "Usage: $0 [--notesp | --usedefault {device-file} | --root {dir} |"
              echo "                     --ownhfs {device-file} ] [--keepname]"
              echo "                  [--nodrivers | --alldrivers] [--shim {shimfile}]"
-             echo "                  [--localkeys [--encryptkeys]] [--keepname] [--yes]"
+             echo "                  [--localkeys [--encryptkeys]] [--nvramonly] [--yes]"
              exit 1
       esac
       shift
@@ -194,6 +198,10 @@
       echo "The --keepname option is incompatible with --usedefault! Aborting!"
       exit 1
    fi
+   if [[ "$NvramOnly" == 1 && "$OSTYPE" != "linux" && "$OSTYPE" != "linux-gnu" ]] ; then
+      echo "The --nvramonly option is valid only under Linux! Aborting!"
+      exit 1
+   fi
    if [[ "$InstallDrivers" == "all" && "$TargetDir" != "/EFI/BOOT" ]] ; then
       echo "The --alldrivers option is meant for creating USB flash drives with (near-)"
       echo "universal boot support. Using it on a hard disk partition runs the risk of"
@@ -1209,6 +1217,20 @@
    echo "ESP was found at $InstallDir using $EspFilesystem"
 } # FindMountedESP
 
+# Identifies the rEFInd EFI boot image filename.
+DetermineBootImageName() {
+   if [[ "$TargetDir" == '/EFI/BOOT' ]] ; then
+      Refind="boot$Platform.efi"
+   elif [[ "$ShimSource" != "none" ]] ; then
+      if [[ "$TargetShim" == "default" ]] ; then
+         TargetShim=`basename "$ShimSource"`
+      fi
+      Refind="$TargetShim"
+   else
+      Refind="refind_$Platform.efi"
+   fi
+} # DetermineBootImageName
+
 # Uses efibootmgr to add an entry for rEFInd to the EFI's NVRAM, if necessary.
 # If this fails, sets Problems=1
 AddBootEntry() {
@@ -1344,6 +1366,12 @@
       DetermineTargetDir
    fi
 
+   if [[ $NvramOnly == 1 ]] ; then
+      DetermineBootImageName
+      AddBootEntry
+      return
+   fi
+
    if [[ $LocalKeys == 1 ]] ; then
       ReSignBinaries
    fi