Implemented count for blocks to overwrite; https://chatgpt.com/share/ac2b59af-c0f0-486f-89fe-0301d4915837

scripts/base.sh

@@ -95,15 +95,28 @@ set_device_path(){
   info "Optimal blocksize set to: $OPTIMAL_BLOCKSIZE" || error
 }
 
-overwritte_device_with_zeros(){
-  question "Should $device_path be overwritten with zeros before copying?(y/N)" && read -r copy_zeros_to_device
-  if [ "$copy_zeros_to_device" = "y" ]
-    then
-      info "Overwritting..." &&
-      dd if=/dev/zero of="$device_path" bs="$OPTIMAL_BLOCKSIZE" status=progress || error "Overwritting $device_path failed."
+overwrite_device() {
+  question "Should $device_path be overwritten with zeros before copying? (y/N/block count)" && read -r copy_zeros_to_device
+  case "$copy_zeros_to_device" in
+    y)
+      info "Overwriting entire device..." &&
+      dd if=/dev/zero of="$device_path" bs="$OPTIMAL_BLOCKSIZE" status=progress || error "Overwriting $device_path failed."
+      ;;
+    N)
+      info "Skipping Overwriting..."
+      ;;
+    ''|*[!0-9]*)
+      error "Invalid input."
+      ;;
+    *)
+      if [[ "$copy_zeros_to_device" =~ ^[0-9]+$ ]]; then
+        info "Overwriting $copy_zeros_to_device blocks..." &&
+        dd if=/dev/zero of="$device_path" bs="$OPTIMAL_BLOCKSIZE" count="$copy_zeros_to_device" status=progress || error "Overwriting $device_path failed."
       else
-      info "Skipping Overwritting..."
+        error "Invalid input. Block count must be a number."
       fi
+      ;;
+  esac
 }
 
 get_packages(){

scripts/encryption/storage/single_drive/setup.sh

@@ -7,7 +7,7 @@ echo "Setups disk encryption"
 
 set_device_mount_partition_and_mapper_paths
 
-overwritte_device_with_zeros
+overwrite_device
 
 info "Creating new GPT partition table..."
 (	echo "g"	# create a new empty GPT partition table

scripts/image/setup.sh

@@ -263,7 +263,7 @@ if [ "$transfer_image" = "y" ]
         info "Skipping partition table deletion..."
     fi
 
-    overwritte_device_with_zeros
+    overwrite_device
 
     info "Starting image transfer..."
     if [ "$distribution" = "arch" ]