install stage 1: Attempt to unmount target disk if it’s mounted

install-stage1.sh

@@ -5,11 +5,13 @@ LOGFILE=/tmp/void-usb-install-log
 function press_any_key {
   echo "Press any key to continue or Ctrl+c to abort..."
   read -n1 DISCARD_ME
+  echo ""
 }
 
 function are_you_really_really_sure {
   echo "Enter the following to continue: $1"
   read -p "> " DISCARD_ME
+  echo ""
   if [ "$1" = "$DISCARD_ME" ]; then
     return 0
   else
@@ -100,6 +102,27 @@ else
   exit 1
 fi
 
+if grep "$TARGET_DISK" /proc/mounts >> $LOGFILE 2>&1; then
+  echo "The device seems to be mounted. Unmount?"
+  if yesno; then
+    echo -n "Attempting to unmount... "
+    readarray -t MOUNTPOINTS <<< "$(findmnt --raw --noheadings --output SOURCE,TARGET | grep "$TARGET_DISK" | sed 's/^[^ ]* //')"
+    for I in ${!MOUNTPOINTS[@]}; do
+      umount -R "${MOUNTPOINTS[$I]}" >> $LOGFILE 2>&1
+    done
+    if grep "$TARGET_DISK" /proc/mounts >> $LOGFILE 2>&1; then
+      echo "failed"
+      echo "It seems the device is still mounted. Installation cannot continue."
+      exit 1
+    else
+      echo "done"
+    fi
+  else
+    echo "Aborting."
+    exit 1
+  fi
+fi
+
 echo -n "Wiping and partitioning storage... "
 # new GPT
 # 2M BIOS GRUB