feat(logging): add log path configuration and implement logrotate policy

sys/core.go

@@ -78,10 +78,12 @@ ExecStart=%s -c %s
 User=%s
 Restart=on-failure
 RestartSec=5
+StandardOutput=append:%s/superfrpc_%d.log
+StandardError=append:%s/superfrpc_%d.log
 
 [Install]
 WantedBy=multi-user.target
-`, instanceID, frpcPath, configPath, runUser)
+`, instanceID, frpcPath, configPath, runUser, global.CurrentConfig.LogsPath, instanceID, global.CurrentConfig.LogsPath, instanceID)
 
 	servicePath := filepath.Join("/etc/systemd/system", serviceName+".service")
 	if err := os.WriteFile(servicePath, []byte(serviceContent), 0644); err != nil {
@@ -102,6 +104,27 @@ WantedBy=multi-user.target
 	return nil
 }
 
+func CreateLogrotatePolicy() error {
+	logrotatePath := "/etc/logrotate.d/superfrpc_frpclog"
+	policyContent := fmt.Sprintf(`%s/superfrpc_*.log {
+    daily
+    rotate 7
+    compress
+    delaycompress
+    missingok
+    notifempty
+}
+`, global.CurrentConfig.LogsPath)
+	if err := os.WriteFile(logrotatePath, []byte(policyContent), 0644); err != nil {
+		return fmt.Errorf("failed to create logrotate policy file: %w", err)
+	}
+	
+	if err := exec.Command("logrotate", "-f", logrotatePath).Run(); err != nil {
+		return fmt.Errorf("failed to apply logrotate policy: %w", err)
+	}
+	return nil
+}
+
 func createInitDService(instanceID int, configPath, runUser string) error {
 	frpcPath, err := GetFrpcPath()
 	if err != nil {