fix(tor-shield): Fix json_init bug and permission issues

RPCD backend:
- Fix critical json_init bug: variables must be extracted BEFORE
  json_init() which wipes the loaded JSON. Affected functions:
  save_settings, do_enable, set_bridges, add/remove_hidden_service
- Fix process detection: use pgrep instead of pid file
- Fix uptime calculation: get PID from pgrep, not pid file
- Fix RPC expect unwrapping in getDashboardData for presets

Init script:
- Remove PidFile directive (procd manages the process)
- Clean up stale files before starting to avoid permission issues
- Set proper ownership on torrc after generation
- Fix iptables chain creation to handle "already exists" gracefully
- Remove from OUTPUT chain before attempting chain deletion

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package/secubox/luci-app-tor-shield/htdocs/luci-static/resources/tor-shield/api.js

@@ -188,9 +188,13 @@ return baseclass.extend({
 			callPresets(),
 			callBandwidth()
 		]).then(function(results) {
+			// Handle RPC expect unwrapping - results may be array or object
+			var presetsData = results[1] || [];
+			var presets = Array.isArray(presetsData) ? presetsData : (presetsData.presets || []);
+
 			return {
 				status: results[0] || {},
-				presets: (results[1] || {}).presets || [],
+				presets: presets,
 				bandwidth: results[2] || {}
 			};
 		});

package/secubox/luci-app-tor-shield/root/usr/libexec/rpcd/luci.tor-shield

@@ -32,15 +32,10 @@ tor_control() {
 	} | socat - UNIX-CONNECT:"$TOR_CONTROL" 2>/dev/null
 }
 
-# Check if Tor is running (via tor-shield, not just any tor process)
+# Check if Tor is running
 is_running() {
-	# Check for tor-shield's pid file first
-	if [ -f "$TOR_RUN/tor.pid" ]; then
-		local pid=$(cat "$TOR_RUN/tor.pid" 2>/dev/null)
-		[ -n "$pid" ] && [ -d "/proc/$pid" ] && return 0
-	fi
-	# Fallback to checking any tor process
-	pgrep tor >/dev/null 2>&1
+	# Check for tor process (procd manages the process, no pid file)
+	pgrep -f "/usr/sbin/tor" >/dev/null 2>&1
 }
 
 # Check if tor-shield control socket is available
@@ -113,15 +108,12 @@ get_status() {
 			fi
 		fi
 
-		# Uptime from pid file
-		local pidfile="$TOR_RUN/tor.pid"
-		if [ -f "$pidfile" ]; then
-			local pid=$(cat "$pidfile")
-			if [ -d "/proc/$pid" ]; then
-				local start_time=$(stat -c %Y "/proc/$pid" 2>/dev/null)
-				local now=$(date +%s)
-				json_add_int "uptime" "$((now - start_time))"
-			fi
+		# Uptime from process start time
+		local pid=$(pgrep -f "/usr/sbin/tor" | head -1)
+		if [ -n "$pid" ] && [ -d "/proc/$pid" ]; then
+			local start_time=$(stat -c %Y "/proc/$pid" 2>/dev/null)
+			local now=$(date +%s)
+			json_add_int "uptime" "$((now - start_time))"
 		fi
 	else
 		json_add_boolean "running" 0
@@ -149,12 +141,15 @@ get_status() {
 do_enable() {
 	read input
 	json_load "$input"
+
+	# Get values from input BEFORE json_init
+	local preset
 	json_get_var preset preset
-
-	json_init
-
 	[ -z "$preset" ] && preset="anonymous"
 
+	# Now initialize output JSON
+	json_init
+
 	# Load preset configuration
 	config_load "$CONFIG"
 
@@ -383,10 +378,14 @@ add_hidden_service_json() {
 add_hidden_service() {
 	read input
 	json_load "$input"
+
+	# Get values from input BEFORE json_init
+	local name local_port virtual_port
 	json_get_var name name
 	json_get_var local_port local_port
 	json_get_var virtual_port virtual_port
 
+	# Now initialize output JSON
 	json_init
 
 	if [ -z "$name" ]; then
@@ -420,8 +419,12 @@ add_hidden_service() {
 remove_hidden_service() {
 	read input
 	json_load "$input"
+
+	# Get values from input BEFORE json_init
+	local name
 	json_get_var name name
 
+	# Now initialize output JSON
 	json_init
 
 	if [ -z "$name" ]; then
@@ -587,9 +590,13 @@ add_bridge_json() {
 set_bridges() {
 	read input
 	json_load "$input"
+
+	# Get values from input BEFORE json_init
+	local enabled type
 	json_get_var enabled enabled
 	json_get_var type type
 
+	# Now initialize output JSON
 	json_init
 
 	[ -n "$enabled" ] && uci set tor-shield.bridges.enabled="$enabled"
@@ -664,9 +671,9 @@ save_settings() {
 	read input
 	json_load "$input"
 
-	json_init
-
-	# Get values from input
+	# Get values from input BEFORE json_init (which wipes loaded JSON)
+	local mode dns_over_tor kill_switch socks_port trans_port dns_port
+	local exit_nodes exclude_exit strict_nodes
 	json_get_var mode mode
 	json_get_var dns_over_tor dns_over_tor
 	json_get_var kill_switch kill_switch
@@ -677,6 +684,9 @@ save_settings() {
 	json_get_var exclude_exit exclude_exit_nodes
 	json_get_var strict_nodes strict_nodes
 
+	# Now initialize output JSON
+	json_init
+
 	# Apply settings
 	[ -n "$mode" ] && uci set tor-shield.main.mode="$mode"
 	[ -n "$dns_over_tor" ] && uci set tor-shield.main.dns_over_tor="$dns_over_tor"

package/secubox/secubox-app-tor/files/etc/init.d/tor-shield

@@ -37,6 +37,11 @@ generate_torrc() {
 	config_get strict_nodes security strict_nodes '0'
 
 	mkdir -p "$TOR_RUN" "$TOR_DATA"
+
+	# Clean up stale files that may have wrong ownership
+	rm -f "$TOR_RUN/tor.pid" "$TOR_RUN/control" "$TOR_RUN/control_auth_cookie" 2>/dev/null
+	rm -f "$TOR_DATA/lock" 2>/dev/null
+
 	chown tor:tor "$TOR_RUN" "$TOR_DATA"
 	chmod 700 "$TOR_RUN" "$TOR_DATA"
 
@@ -46,7 +51,6 @@ generate_torrc() {
 
 User tor
 DataDirectory $TOR_DATA
-PidFile $TOR_RUN/tor.pid
 Log notice syslog
 ControlSocket $TOR_RUN/control
 ControlSocketsGroupWritable 1
@@ -123,6 +127,9 @@ EOF
 	if [ -f /usr/share/tor/geoip6 ]; then
 		echo "GeoIPv6File /usr/share/tor/geoip6" >> "$TORRC"
 	fi
+
+	# Ensure torrc is readable by tor user
+	chown tor:tor "$TORRC"
 }
 
 add_bridge_line() {
@@ -166,6 +173,10 @@ setup_iptables() {
 	# Get Tor user ID
 	local tor_uid=$(id -u tor 2>/dev/null || echo "tor")
 
+	# Remove from OUTPUT chain first (to allow chain deletion)
+	iptables -t nat -D OUTPUT -j TOR_SHIELD 2>/dev/null
+	iptables -t filter -D OUTPUT -j TOR_SHIELD 2>/dev/null
+
 	# Clear existing Tor rules
 	iptables -t nat -F TOR_SHIELD 2>/dev/null
 	iptables -t nat -X TOR_SHIELD 2>/dev/null
@@ -174,9 +185,9 @@ setup_iptables() {
 
 	[ "$mode" = "transparent" ] || return 0
 
-	# Create chains
-	iptables -t nat -N TOR_SHIELD
-	iptables -t filter -N TOR_SHIELD
+	# Create chains (ignore "already exists" errors)
+	iptables -t nat -N TOR_SHIELD 2>/dev/null || true
+	iptables -t filter -N TOR_SHIELD 2>/dev/null || true
 
 	# Exclude Tor traffic
 	iptables -t nat -A TOR_SHIELD -m owner --uid-owner $tor_uid -j RETURN