Method cleanupOrphanedProcesses

backend/xray/core.go:385–434

cleanupOrphanedProcesses finds and kills xray processes that are: 1. Zombie processes (orphaned from their parent) 2. Processes where the node itself is the parent (PPID matches node PID)

()

// 1. Zombie processes (orphaned from their parent)
// 2. Processes where the node itself is the parent (PPID matches node PID)
func (c *Core) cleanupOrphanedProcesses() error {
	processes, err := findXrayProcesses(c.executablePath)
	if err != nil {
		return fmt.Errorf("failed to find xray processes: %w", err)
	}

	currentPID := 0
	if c.process != nil && c.process.Process != nil {
		currentPID = c.process.Process.Pid
	}

	// Get current node process PID
	nodePID := os.Getpid()

	killedCount := 0
	for _, procInfo := range processes {
		if procInfo.PID == currentPID {
			continue
		}

		// Only clean up processes we own (parented by this node process)
		// or zombies that have been reparented to init (no real parent).
		kill := false
		reason := ""
		if procInfo.IsZombie && (procInfo.PPID == 0 || procInfo.PPID == 1) {
			kill = true
			reason = "zombie xray process without parent"
		} else if procInfo.PPID == nodePID {
			kill = true
			reason = fmt.Sprintf("orphaned xray process with node as parent (PPID: %d)", procInfo.PPID)
		}

		if !kill {
			continue
		}

		log.Printf("%s %d (PPID: %d), killing it", reason, procInfo.PID, procInfo.PPID)
		if err := killProcessTree(procInfo.PID); err != nil {
			log.Printf("warning: failed to kill orphaned process %d: %v", procInfo.PID, err)
		} else {
			killedCount++
		}
	}

	if killedCount > 0 {
		log.Printf("cleaned up %d orphaned xray process(es)", killedCount)
	}

	return nil
}