Finish windows support

- Fix service creation
- Singleton lock
- Control error/logging
- Revamp run/service interaction
- Add option to turn off stdout/stderr output (for Windows Service)
- Use log instead of fmt.Print*

pmctl/logs.go

@@ -0,0 +1,143 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+	"runtime/pprof"
+	"time"
+
+	"github.com/safing/portbase/container"
+	"github.com/safing/portbase/database/record"
+	"github.com/safing/portbase/formats/dsd"
+	"github.com/safing/portbase/info"
+	"github.com/safing/portmaster/updates"
+	"github.com/spf13/cobra"
+)
+
+func initializeLogFile(logFilePath string, identifier string, updateFile *updates.File) *os.File {
+	logFile, err := os.OpenFile(logFilePath, os.O_RDWR|os.O_CREATE, 0644)
+	if err != nil {
+		log.Printf("failed to create log file %s: %s\n", logFilePath, err)
+		return nil
+	}
+
+	// create header, so that the portmaster can view log files as a database
+	meta := record.Meta{}
+	meta.Update()
+	meta.SetAbsoluteExpiry(time.Now().Add(720 * time.Hour).Unix()) // one month
+
+	// manually marshal
+	// version
+	c := container.New([]byte{1})
+	// meta
+	metaSection, err := dsd.Dump(meta, dsd.JSON)
+	if err != nil {
+		log.Printf("failed to serialize header for log file %s: %s\n", logFilePath, err)
+		finalizeLogFile(logFile, logFilePath)
+		return nil
+	}
+	c.AppendAsBlock(metaSection)
+	// log file data type (string) and newline for better manual viewing
+	c.Append([]byte("S\n"))
+	c.Append([]byte(fmt.Sprintf("executing %s version %s on %s %s\n", identifier, updateFile.Version(), runtime.GOOS, runtime.GOARCH)))
+
+	_, err = logFile.Write(c.CompileData())
+	if err != nil {
+		log.Printf("failed to write header for log file %s: %s\n", logFilePath, err)
+		finalizeLogFile(logFile, logFilePath)
+		return nil
+	}
+
+	return logFile
+}
+
+func finalizeLogFile(logFile *os.File, logFilePath string) {
+	err := logFile.Close()
+	if err != nil {
+		log.Printf("failed to close log file %s: %s\n", logFilePath, err)
+	}
+
+	// check file size
+	stat, err := os.Stat(logFilePath)
+	if err == nil {
+		// delete if file is smaller than
+		if stat.Size() < 200 { // header + info is about 150 bytes
+			err := os.Remove(logFilePath)
+			if err != nil {
+				log.Printf("failed to delete empty log file %s: %s\n", logFilePath, err)
+			}
+		}
+	}
+}
+
+func initControlLogFile() *os.File {
+	// create logging dir
+	logFileBasePath := filepath.Join(*databaseRootDir, "logs", "fstree", "control")
+	err := os.MkdirAll(logFileBasePath, 0777)
+	if err != nil {
+		log.Printf("failed to create log file folder %s: %s\n", logFileBasePath, err)
+		return nil
+	}
+
+	// open log file
+	logFilePath := filepath.Join(logFileBasePath, fmt.Sprintf("%s.log", time.Now().UTC().Format("2006-02-01-15-04-05")))
+	return initializeLogFile(logFilePath, "control/portmaster-control", updates.NewFile("", info.Version(), false))
+}
+
+func logControlError(cErr error) {
+	// check if error present
+	if cErr == nil {
+		return
+	}
+
+	// create dir
+	logFileBasePath := filepath.Join(*databaseRootDir, "logs", "fstree", "control")
+	err := os.MkdirAll(logFileBasePath, 0777)
+	if err != nil {
+		log.Printf("failed to create log file folder %s: %s\n", logFileBasePath, err)
+	}
+
+	// open log file
+	logFilePath := filepath.Join(logFileBasePath, fmt.Sprintf("%s.error.log", time.Now().UTC().Format("2006-02-01-15-04-05")))
+	errorFile := initializeLogFile(logFilePath, "control/portmaster-control", updates.NewFile("", info.Version(), false))
+	if errorFile == nil {
+		return
+	}
+
+	// write error and close
+	fmt.Fprintln(errorFile, cErr.Error())
+	errorFile.Close()
+}
+
+func logControlStack() {
+	// create dir
+	logFileBasePath := filepath.Join(*databaseRootDir, "logs", "fstree", "control")
+	err := os.MkdirAll(logFileBasePath, 0777)
+	if err != nil {
+		log.Printf("failed to create log file folder %s: %s\n", logFileBasePath, err)
+	}
+
+	// open log file
+	logFilePath := filepath.Join(logFileBasePath, fmt.Sprintf("%s.stack.log", time.Now().UTC().Format("2006-02-01-15-04-05")))
+	errorFile := initializeLogFile(logFilePath, "control/portmaster-control", updates.NewFile("", info.Version(), false))
+	if errorFile == nil {
+		return
+	}
+
+	// write error and close
+	pprof.Lookup("goroutine").WriteTo(errorFile, 1)
+	errorFile.Close()
+}
+
+func runAndLogControlError(wrappedFunc func(cmd *cobra.Command, args []string) error) func(cmd *cobra.Command, args []string) error {
+	return func(cmd *cobra.Command, args []string) error {
+		err := wrappedFunc(cmd, args)
+		if err != nil {
+			logControlError(err)
+		}
+		return err
+	}
+}