[WIP] Updater support for windows

cmds/portmaster-core/main_linux.go

@@ -0,0 +1,100 @@
+package main
+
+import (
+	"fmt"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/safing/portmaster/base/log"
+	"github.com/safing/portmaster/service"
+)
+
+func run(instance *service.Instance) {
+	// Set default log level.
+	log.SetLogLevel(log.WarningLevel)
+	_ = log.Start()
+
+	// Start
+	go func() {
+		err := instance.Start()
+		if err != nil {
+			fmt.Printf("instance start failed: %s\n", err)
+
+			// Print stack on start failure, if enabled.
+			if printStackOnExit {
+				printStackTo(os.Stdout, "PRINTING STACK ON START FAILURE")
+			}
+
+			os.Exit(1)
+		}
+	}()
+
+	// Wait for signal.
+	signalCh := make(chan os.Signal, 1)
+	if enableInputSignals {
+		go inputSignals(signalCh)
+	}
+	signal.Notify(
+		signalCh,
+		os.Interrupt,
+		syscall.SIGHUP,
+		syscall.SIGINT,
+		syscall.SIGTERM,
+		syscall.SIGQUIT,
+		sigUSR1,
+	)
+
+	select {
+	case sig := <-signalCh:
+		// Only print and continue to wait if SIGUSR1
+		if sig == sigUSR1 {
+			printStackTo(os.Stderr, "PRINTING STACK ON REQUEST")
+		} else {
+			fmt.Println(" <INTERRUPT>") // CLI output.
+			slog.Warn("program was interrupted, stopping")
+		}
+
+	case <-instance.Stopped():
+		log.Shutdown()
+		os.Exit(instance.ExitCode())
+	}
+
+	// Catch signals during shutdown.
+	// Rapid unplanned disassembly after 5 interrupts.
+	go func() {
+		forceCnt := 5
+		for {
+			<-signalCh
+			forceCnt--
+			if forceCnt > 0 {
+				fmt.Printf(" <INTERRUPT> again, but already shutting down - %d more to force\n", forceCnt)
+			} else {
+				printStackTo(os.Stderr, "PRINTING STACK ON FORCED EXIT")
+				os.Exit(1)
+			}
+		}
+	}()
+
+	// Rapid unplanned disassembly after 3 minutes.
+	go func() {
+		time.Sleep(3 * time.Minute)
+		printStackTo(os.Stderr, "PRINTING STACK - TAKING TOO LONG FOR SHUTDOWN")
+		os.Exit(1)
+	}()
+
+	// Stop instance.
+	if err := instance.Stop(); err != nil {
+		slog.Error("failed to stop", "err", err)
+	}
+	log.Shutdown()
+
+	// Print stack on shutdown, if enabled.
+	if printStackOnExit {
+		printStackTo(os.Stdout, "PRINTING STACK ON EXIT")
+	}
+
+	os.Exit(instance.ExitCode())
+}