Fail softly and create necessary directory for config

config.go

@@ -1,12 +1,10 @@
-// TODO: Check permissions on file
-// TODO: Create dir if needed
-// TODO: Dont' fail hard on failed read
 package main
 
 import (
 	"bufio"
 	"io/ioutil"
 	"os"
+	"path"
 
 	"github.com/naoina/toml"
 	"github.com/op/go-logging"
@@ -28,18 +26,25 @@ type FirewallConfigs struct {
 
 var FirewallConfig FirewallConfigs
 
-func readConfig() {
+func _readConfig(file string) []byte {
 	f, err := os.Open(configDefaultPath)
 	if err != nil {
-		log.Error(err.Error())
+		log.Warning(err.Error())
-		os.Exit(1)
+		return []byte{}
 	}
 	defer f.Close()
 	buf, err := ioutil.ReadAll(f)
 	if err != nil {
-		log.Error(err.Error())
+		log.Warning(err.Error())
-		os.Exit(1)
+		return []byte{}
 	}
+
+	return buf
+}
+
+func readConfig() {
+	buf := _readConfig(configDefaultPath)
+
 	FirewallConfig = FirewallConfigs{
 		LogLevel:        "NOTICE",
 		LoggingLevel:    logging.NOTICE,
@@ -50,10 +55,12 @@ func readConfig() {
 		DefaultActionId: 1,
 	}
 
+	if len(buf) > 0 {
 		if err := toml.Unmarshal(buf, &FirewallConfig); err != nil {
 			log.Error(err.Error())
 			os.Exit(1)
 		}
+	}
 	FirewallConfig.LoggingLevel, _ = logging.LogLevel(FirewallConfig.LogLevel)
 	FirewallConfig.DefaultActionId = valueScope(FirewallConfig.DefaultAction)
 }
@@ -62,10 +69,19 @@ func writeConfig() {
 	FirewallConfig.LogLevel = FirewallConfig.LoggingLevel.String()
 	FirewallConfig.DefaultAction = printScope(FirewallConfig.DefaultActionId)
 
+	if _, err := os.Stat(path.Dir(configDefaultPath)); err != nil && os.IsNotExist(err) {
+		if err := os.MkdirAll(path.Dir(configDefaultPath), 0755); err != nil {
+			log.Error(err.Error())
+			//os.Exit(1)
+			return
+		}
+	}
+
 	f, err := os.Create(configDefaultPath)
 	if err != nil {
 		log.Error(err.Error())
-		os.Exit(1)
+		//os.Exit(1)
+		return
 	}
 	defer f.Close()
 
@@ -73,7 +89,8 @@ func writeConfig() {
 	cw := toml.NewEncoder(w)
 	if err := cw.Encode(FirewallConfig); err != nil {
 		log.Error(err.Error())
-		os.Exit(1)
+		//os.Exit(1)
+		return
 	}
 	w.Flush()
 }