Fix PID file creation in watchdog start case

- Create PID file in start case with correct background process PID
- Remove PID file creation from main() function to avoid empty files
- Validate background process is running before reporting success
- Clean up PID file if process fails to start
- Fix both wssshd and wssshc watchdogs

wsssh-server/debian/wssshd-watchdog

@@ -198,10 +198,6 @@ main() {
 
     log_message "START validation passed, proceeding with watchdog initialization"
 
-    # Store watchdog PID (use the background process PID captured by parent)
-    echo $MAIN_PID > "$WATCHDOG_PID_FILE"
-    log_message "Created PID file with PID: $MAIN_PID"
-
     log_message "Watchdog started for $DAEMON_NAME"
     log_message "Check interval: $CHECK_INTERVAL seconds"
     log_message "Max restarts: $MAX_RESTARTS per $RESTART_WINDOW seconds"
@@ -259,16 +255,19 @@ case "$1" in
         main &
         MAIN_PID=$!
 
+        # Create PID file with the background process PID
+        echo $MAIN_PID > "$WATCHDOG_PID_FILE"
+
         # Give it a moment to start
         sleep 1
 
-        # Check if PID file was created
-        if [ -f "$WATCHDOG_PID_FILE" ]; then
-            watchdog_pid=$(cat "$WATCHDOG_PID_FILE")
-            echo "Watchdog started successfully (PID: $watchdog_pid)"
+        # Check if the process is still running
+        if kill -0 $MAIN_PID 2>/dev/null; then
+            echo "Watchdog started successfully (PID: $MAIN_PID)"
             exit 0  # Exit immediately to avoid killing background main process
         else
-            echo "Watchdog failed to create PID file"
+            echo "Watchdog failed to start"
+            rm -f "$WATCHDOG_PID_FILE"
             exit 1
         fi
         ;;

wssshtools/debian/wssshc-watchdog

@@ -193,10 +193,6 @@ main() {
 
     log_message "START validation passed, proceeding with watchdog initialization"
 
-    # Store watchdog PID (use the background process PID captured by parent)
-    echo $MAIN_PID > "$WATCHDOG_PID_FILE"
-    log_message "Created PID file with PID: $MAIN_PID"
-
     log_message "Watchdog started for $DAEMON_NAME"
     log_message "Check interval: $CHECK_INTERVAL seconds"
     log_message "Max restarts: $MAX_RESTARTS per $RESTART_WINDOW seconds"
@@ -254,16 +250,19 @@ case "$1" in
         main &
         MAIN_PID=$!
 
+        # Create PID file with the background process PID
+        echo $MAIN_PID > "$WATCHDOG_PID_FILE"
+
         # Give it a moment to start
         sleep 1
 
-        # Check if PID file was created
-        if [ -f "$WATCHDOG_PID_FILE" ]; then
-            watchdog_pid=$(cat "$WATCHDOG_PID_FILE")
-            echo "Watchdog started successfully (PID: $watchdog_pid)"
+        # Check if the process is still running
+        if kill -0 $MAIN_PID 2>/dev/null; then
+            echo "Watchdog started successfully (PID: $MAIN_PID)"
             exit 0  # Exit immediately to avoid killing background main process
         else
-            echo "Watchdog failed to create PID file"
+            echo "Watchdog failed to start"
+            rm -f "$WATCHDOG_PID_FILE"
             exit 1
         fi
         ;;