Revert + allow RUN_AS

https://github.com/alexbelgium/hassio-addons/issues/1450#issuecomment-2651980887

signalk/rootfs/etc/cont-init.d/99-run.sh

@@ -3,23 +3,43 @@
 set -e
 # hadolint ignore=SC2155
 
-# Set configuration directory
-mkdir -p /config/.signalk
-if [ -d "/home/node/.signalk" ]; then
-    if [ -n "$(find /home/node/.signalk -mindepth 1 -print -quit 2>/dev/null)" ]; then
-        cp -r /home/node/.signalk/* /config/.signalk/
-    fi
-    rm -rf "/home/node/.signalk"
+# Variables
+USER=node
+if bashio::config_has.value "RUN_AS"; then
+    USER="$(bashio::config "RUN_AS")"
+    bashio::log.warning "RUN_AS is set, app will run as $USER"
 fi
-ln -sf /config/.signalk "/home/node/.signalk"
 
-# Set single user for SSL files
+# Set configuration directory
+if [ -d "/home/node/.signalk" ]; then
+    rm -r "/home/node/.signalk"
+fi
+ln -sf /config "/home/node/.signalk"
+chown -R "$USER:$USER" /config
+chown -R "$USER:$USER" "/home/node/.signalk"
+
+# Option 1 : define permissions for /dev/ttyUSB
+for device in /dev/ttyUSB /dev/ttyUSB0 /dev/ttyUSB1; do
+    if [ -e "$device" ]; then
+        # Check if 'node' is already in the 'root' group before modifying
+        if ! groups node | grep -q '\broot\b'; then
+            sudo usermod -a -G root node || true
+            echo "User 'node' added to group 'root'."
+        else
+            echo "User 'node' is already in group 'root'."
+        fi
+    fi
+done
+
+
+# Option 2 : set single user for SSL files
 for file in ssl-key.pem ssl-cert.pem; do
     if [ -e "/config/.signalk/$file" ]; then
-        chown "$(id -u):$(id -g)" "/config/.signalk/$file"
+        chown "$USER:$USER" "/config/.signalk/$file"
         chmod 600 "/config/.signalk/$file"
     fi
 done
 
 bashio::log.info "Starting application"
-exec /home/node/signalk/startup.sh
+
+sudo -u "$USER" -s /bin/sh -c "/home/node/signalk/startup.sh"