New: install.sh can preserve old configuration file (--keep-configu…

…ration)

install.sh

@@ -13,10 +13,20 @@ if [[ $EUID -ne 0 ]]; then
   exit 1
 fi
 
+# Display help text
+if [ "$1" == "--help" ] || [ "$1" == "-h" ]; then
+  echo "usage: $(basename $0) -h --help --keep-config"
+  echo "           -h, --help      help text"
+  echo "           --keep-config   keep the original configuration file"
+  exit 0
+fi
+
 # Backup original files
 if [ -f "$TARGET_DIR/smfc.py" ]; then
   cp "$TARGET_DIR/smfc.py" "$TARGET_DIR/smfc.py.$POSTFIX"
-  cp "$TARGET_DIR/smfc.conf" "$TARGET_DIR/smfc.conf.$POSTFIX"
+  if [ "$1" != "--keep-config" ]; then
+    cp "$TARGET_DIR/smfc.conf" "$TARGET_DIR/smfc.conf.$POSTFIX"
+  fi
 fi
 
 # Create the target folder if does not exist
@@ -26,10 +36,13 @@ fi
 
 # Copy new files to the target folders
 cp ./src/smfc.py "$TARGET_DIR/"
-cp ./src/smfc.conf "$TARGET_DIR/"
+if [ "$1" != "--keep-config" ]; then
+  cp ./src/smfc.conf "$TARGET_DIR/"
+  chown root:root "$TARGET_DIR/smfc.py"
+fi
 cp ./src/smfc /etc/default/
 cp ./src/smfc.service /etc/systemd/system/
-chown root:root "$TARGET_DIR/smfc.py" "$TARGET_DIR/smfc.conf" /etc/default/smfc /etc/systemd/system/smfc.service
+chown root:root "$TARGET_DIR/smfc.py" /etc/default/smfc /etc/systemd/system/smfc.service
 
 # Generate a real hd_names= entry in the new 'smfc.conf'.
 hd_name=$(ls -l /dev/disk/by-id/|grep .*ata-.*sda$|tr -s ' '|cut -d' ' -f 9)