improve signals handling

service/service.go

@@ -79,7 +79,7 @@ func (s *Service) Start() error {
 		}
 	}
 	if !config.HasServicesToStart() {
-		infoString := "No service configured, nothing to do"
+		infoString := "no service configured, nothing to do"
 		logger.Info(logSender, "", infoString)
 		logger.InfoToConsole(infoString)
 		return errors.New(infoString)
@@ -216,8 +216,7 @@ func (s *Service) startServices() {
 // Wait blocks until the service exits
 func (s *Service) Wait() {
 	if s.PortableMode != 1 {
-		registerSigHup()
-		registerSigUSR1()
+		registerSignals()
 	}
 	<-s.Shutdown
 }
@@ -236,10 +235,10 @@ func (s *Service) loadInitialData() error {
 		return fmt.Errorf("invalid input_file %#v, it must be an absolute path", s.LoadDataFrom)
 	}
 	if s.LoadDataMode < 0 || s.LoadDataMode > 1 {
-		return fmt.Errorf("Invalid loaddata-mode %v", s.LoadDataMode)
+		return fmt.Errorf("invalid loaddata-mode %v", s.LoadDataMode)
 	}
 	if s.LoadDataQuotaScan < 0 || s.LoadDataQuotaScan > 2 {
-		return fmt.Errorf("Invalid loaddata-scan %v", s.LoadDataQuotaScan)
+		return fmt.Errorf("invalid loaddata-scan %v", s.LoadDataQuotaScan)
 	}
 	info, err := os.Stat(s.LoadDataFrom)
 	if err != nil {

service/signals_unix.go

@@ -0,0 +1,75 @@
+// +build !windows
+
+package service
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/drakkan/sftpgo/common"
+	"github.com/drakkan/sftpgo/dataprovider"
+	"github.com/drakkan/sftpgo/ftpd"
+	"github.com/drakkan/sftpgo/httpd"
+	"github.com/drakkan/sftpgo/logger"
+	"github.com/drakkan/sftpgo/telemetry"
+	"github.com/drakkan/sftpgo/webdavd"
+)
+
+func registerSignals() {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGUSR1)
+	go func() {
+		for sig := range c {
+			switch sig {
+			case syscall.SIGHUP:
+				handleSIGHUP()
+			case syscall.SIGUSR1:
+				handleSIGUSR1()
+			case syscall.SIGINT, syscall.SIGTERM:
+				handleInterrupt()
+			}
+		}
+	}()
+}
+
+func handleSIGHUP() {
+	logger.Debug(logSender, "", "Received reload request")
+	err := dataprovider.ReloadConfig()
+	if err != nil {
+		logger.Warn(logSender, "", "error reloading dataprovider configuration: %v", err)
+	}
+	err = httpd.ReloadCertificateMgr()
+	if err != nil {
+		logger.Warn(logSender, "", "error reloading cert manager: %v", err)
+	}
+	err = ftpd.ReloadCertificateMgr()
+	if err != nil {
+		logger.Warn(logSender, "", "error reloading FTPD cert manager: %v", err)
+	}
+	err = webdavd.ReloadCertificateMgr()
+	if err != nil {
+		logger.Warn(logSender, "", "error reloading WebDAV cert manager: %v", err)
+	}
+	err = telemetry.ReloadCertificateMgr()
+	if err != nil {
+		logger.Warn(logSender, "", "error reloading telemetry cert manager: %v", err)
+	}
+	err = common.ReloadDefender()
+	if err != nil {
+		logger.Warn(logSender, "", "error reloading defender's lists: %v", err)
+	}
+}
+
+func handleSIGUSR1() {
+	logger.Debug(logSender, "", "Received log file rotation request")
+	err := logger.RotateLogFile()
+	if err != nil {
+		logger.Warn(logSender, "", "error rotating log file: %v", err)
+	}
+}
+
+func handleInterrupt() {
+	logger.Debug(logSender, "", "Received interrupt request")
+	os.Exit(0)
+}

service/signals_windows.go

@@ -0,0 +1,19 @@
+package service
+
+import (
+	"os"
+	"os/signal"
+
+	"github.com/drakkan/sftpgo/logger"
+)
+
+func registerSignals() {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+	go func() {
+		for range c {
+			logger.Debug(logSender, "", "Received interrupt request")
+			os.Exit(0)
+		}
+	}()
+}