Fix kiosk detection to handle restricted directory permissions

The scripts were failing to find the kiosk installation at /home/kiosk/kiosk-app
because the /home/kiosk directory has restricted permissions (drwxr-x---),
preventing regular users from reading it.

Changes in both update_electron.sh and install_kiosk_0.9.2-6.sh:

1. Updated find_kiosk_dir() to use sudo for all file checks
   - sudo test -f for checking if main.js exists
   - Prevents "permission denied" errors on restricted directories

2. Added Method 4: Detect from running electron process
   - Parses ps output to find electron executable path
   - Extracts app directory from the path
   - Provides fallback when directory searches fail

3. Updated get_current_electron_version functions
   - Use sudo test -f to check if package.json exists
   - Use sudo grep to read package.json and get version
   - Ensures version detection works with restricted permissions

4. Fixed directory existence checks
   - Use sudo test -d for checking kiosk directory

These changes allow the scripts to:
- Find kiosk installations in directories with restricted permissions
- Detect installations even when run as a regular user
- Work correctly with the standard /home/kiosk setup (drwxr-x---)
- Provide better fallback detection using running processes

The scripts will now prompt for sudo password when needed to check
for files in restricted directories, then continue normally.

install_kiosk_0.9.2-6.sh

@@ -8298,8 +8298,8 @@ manual_electron_update() {
     echo "══════════════════════════════════════════════════════════"
     echo ""
 
-    # Check if kiosk directory exists
+    # Check if kiosk directory exists (use sudo in case of restricted permissions)
-    if [ ! -d "$KIOSK_DIR" ]; then
+    if ! sudo test -d "$KIOSK_DIR" 2>/dev/null; then
         log_error "Kiosk directory not found: $KIOSK_DIR"
         pause
         return 1
@@ -8309,19 +8309,19 @@ manual_electron_update() {
     get_current_electron_version_local() {
         local package_json="$KIOSK_DIR/package.json"
 
-        if [ ! -f "$package_json" ]; then
+        if ! sudo test -f "$package_json" 2>/dev/null; then
             echo "unknown"
             return 1
         fi
 
-        # Try to get version from package.json
+        # Try to get version from package.json (use sudo to read)
-        local version=$(grep -oP '"electron"\s*:\s*"\^?\K[0-9.]+' "$package_json" 2>/dev/null || echo "")
+        local version=$(sudo grep -oP '"electron"\s*:\s*"\^?\K[0-9.]+' "$package_json" 2>/dev/null || echo "")
 
         if [ -z "$version" ]; then
             # Try to get from installed node_modules
             local electron_pkg="$KIOSK_DIR/node_modules/electron/package.json"
-            if [ -f "$electron_pkg" ]; then
+            if sudo test -f "$electron_pkg" 2>/dev/null; then
-                version=$(grep -oP '"version"\s*:\s*"\K[0-9.]+' "$electron_pkg" 2>/dev/null || echo "unknown")
+                version=$(sudo grep -oP '"version"\s*:\s*"\K[0-9.]+' "$electron_pkg" 2>/dev/null || echo "unknown")
             else
                 version="not installed"
             fi

update_electron.sh

@@ -55,7 +55,8 @@ find_kiosk_dir() {
     # Method 1: Check default kiosk user home
     if id "$KIOSK_USER" &>/dev/null; then
         local kiosk_home=$(eval echo ~$KIOSK_USER)
-        if [ -f "$kiosk_home/kiosk-app/main.js" ]; then
+        # Use sudo to check file since /home/kiosk may have restricted permissions
+        if sudo test -f "$kiosk_home/kiosk-app/main.js" 2>/dev/null; then
             DETECTED_DIR="$kiosk_home/kiosk-app"
         fi
     fi
@@ -63,7 +64,8 @@ find_kiosk_dir() {
     # Method 2: Search all /home directories
     if [ -z "$DETECTED_DIR" ]; then
         for user_home in /home/*; do
-            if [ -f "$user_home/kiosk-app/main.js" ]; then
+            # Use sudo to check file in case of restricted permissions
+            if sudo test -f "$user_home/kiosk-app/main.js" 2>/dev/null; then
                 DETECTED_DIR="$user_home/kiosk-app"
                 break
             fi
@@ -74,12 +76,24 @@ find_kiosk_dir() {
     if [ -z "$DETECTED_DIR" ]; then
         if systemctl list-units --all kiosk.service 2>/dev/null | grep -q kiosk.service; then
             local service_dir=$(systemctl show -p WorkingDirectory kiosk.service 2>/dev/null | cut -d= -f2)
-            if [ -n "$service_dir" ] && [ -f "$service_dir/main.js" ]; then
+            if [ -n "$service_dir" ] && sudo test -f "$service_dir/main.js" 2>/dev/null; then
                 DETECTED_DIR="$service_dir"
             fi
         fi
     fi
 
+    # Method 4: Check for running electron process
+    if [ -z "$DETECTED_DIR" ]; then
+        local electron_path=$(ps aux | grep -E "electron.*main.js" | grep -v grep | head -1 | awk '{for(i=11;i<=NF;i++) if($i ~ /^\//) {print $i; exit}}')
+        if [ -n "$electron_path" ]; then
+            # Extract directory from electron path (e.g., /home/kiosk/kiosk-app/node_modules/electron/dist/electron -> /home/kiosk/kiosk-app)
+            local app_dir=$(echo "$electron_path" | sed 's|/node_modules/electron.*||')
+            if [ -n "$app_dir" ] && sudo test -f "$app_dir/main.js" 2>/dev/null; then
+                DETECTED_DIR="$app_dir"
+            fi
+        fi
+    fi
+
     echo "$DETECTED_DIR"
 }
 
@@ -91,19 +105,19 @@ get_current_electron_version() {
     local kiosk_dir="$1"
     local package_json="$kiosk_dir/package.json"
 
-    if [ ! -f "$package_json" ]; then
+    if ! sudo test -f "$package_json" 2>/dev/null; then
         echo "unknown"
         return 1
     fi
 
-    # Try to get version from package.json
+    # Try to get version from package.json (use sudo to read)
-    local version=$(grep -oP '"electron"\s*:\s*"\^?\K[0-9.]+' "$package_json" 2>/dev/null || echo "")
+    local version=$(sudo grep -oP '"electron"\s*:\s*"\^?\K[0-9.]+' "$package_json" 2>/dev/null || echo "")
 
     if [ -z "$version" ]; then
         # Try to get from installed node_modules
         local electron_pkg="$kiosk_dir/node_modules/electron/package.json"
-        if [ -f "$electron_pkg" ]; then
+        if sudo test -f "$electron_pkg" 2>/dev/null; then
-            version=$(grep -oP '"version"\s*:\s*"\K[0-9.]+' "$electron_pkg" 2>/dev/null || echo "unknown")
+            version=$(sudo grep -oP '"version"\s*:\s*"\K[0-9.]+' "$electron_pkg" 2>/dev/null || echo "unknown")
         else
             version="not installed"
         fi