added more logging functions and useSSHagent

pkg/backy/backy.go

@@ -11,6 +11,7 @@ import (
 type Host struct {
 	Empty              bool
 	Host               string
+	UseSSHAgent        bool
 	HostName           string
 	Port               uint16
 	PrivateKeyPath     string

pkg/logging/logging.go

@@ -1,10 +1,44 @@
 package logging
 
+import (
+	"errors"
+	"fmt"
+	"log/syslog"
+	"os"
+
+	"github.com/spf13/viper"
+)
+
 type Logging struct {
 	Err    error
 	Output string
 }
 
-func logger() Logging {
-	return Logging{}
+type Logfile struct {
+	LogfilePath string
+}
+
+func OpenLogFile(config *viper.Viper) (interface{}, error) {
+	var logFile *os.File
+	var syslogWriter *syslog.Writer
+	var err error
+	logType := config.GetString("global.logging.type")
+	if logType != "" {
+
+		switch logType {
+		case "file":
+			logFile, err = os.OpenFile(config.GetString("global.logging.file"), os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644)
+			if err != nil {
+				return nil, err
+			}
+			return logFile, nil
+		case "syslog":
+			syslogWriter, err = syslog.New(syslog.LOG_SYSLOG, "Backy")
+			if err != nil {
+				return nil, fmt.Errorf("Unable to set logfile: " + err.Error())
+			}
+			return syslogWriter, nil
+		}
+	}
+	return nil, errors.New("log type not specified; Please set global.logging.type in your config file")
 }