Merge branch 'ethersphere-feature/logging' into develop

17 files changed, 551 insertions, 506 deletions

diff --git a/.gitignore b/.gitignore
index f816a06a1..de3a847ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,5 +9,6 @@
 *un~
 .DS_Store
 */**/.DS_Store
-./ethereum/ethereum
+ethereum/ethereum
+ethereal/ethereal
 
diff --git a/ethereal/assets/qml/wallet.qml b/ethereal/assets/qml/wallet.qml
index 454d0f3f0..84f8fd5cf 100644
--- a/ethereal/assets/qml/wallet.qml
+++ b/ethereal/assets/qml/wallet.qml
@@ -319,7 +319,7 @@ ApplicationWindow {
 
 					Slider {
 						id: logLevelSlider
-						value: 1
+						value: eth.getLogLevelInt()
 						anchors {
 							right: parent.right
 							top: parent.top
@@ -332,7 +332,7 @@ ApplicationWindow {
 						}
 
 						orientation: Qt.Vertical
-						maximumValue: 3
+						maximumValue: 5
 						stepSize: 1
 
 						onValueChanged: {
diff --git a/ethereal/config.go b/ethereal/config.go
deleted file mode 100644
index 2315d1435..000000000
--- a/ethereal/config.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package main
-
-import (
-	"flag"
-)
-
-var Identifier string
-
-//var StartMining bool
-var StartRpc bool
-var RpcPort int
-var UseUPnP bool
-var OutboundPort string
-var ShowGenesis bool
-var AddPeer string
-var MaxPeer int
-var GenAddr bool
-var UseSeed bool
-var ImportKey string
-var ExportKey bool
-var AssetPath string
-
-var Datadir string
-
-func Init() {
-	flag.StringVar(&Identifier, "id", "", "Custom client identifier")
-	flag.StringVar(&OutboundPort, "port", "30303", "listening port")
-	flag.BoolVar(&UseUPnP, "upnp", false, "enable UPnP support")
-	flag.IntVar(&MaxPeer, "maxpeer", 10, "maximum desired peers")
-	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
-	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
-	flag.StringVar(&AssetPath, "asset_path", "", "absolute path to GUI assets directory")
-
-	flag.BoolVar(&ShowGenesis, "genesis", false, "prints genesis header and exits")
-	flag.BoolVar(&UseSeed, "seed", true, "seed peers")
-	flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
-	flag.BoolVar(&ExportKey, "export", false, "export private key")
-	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
-
-	flag.StringVar(&Datadir, "datadir", ".ethereal", "specifies the datadir to use. Takes precedence over config file.")
-
-	flag.Parse()
-}
diff --git a/ethereal/ethereum.go b/ethereal/ethereum.go
deleted file mode 100644
index 0db1fa4cd..000000000
--- a/ethereal/ethereum.go
+++ /dev/null
@@ -1,142 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"github.com/ethereum/eth-go"
-	"github.com/ethereum/eth-go/ethutil"
-	"github.com/ethereum/go-ethereum/ethereal/ui"
-	"github.com/ethereum/go-ethereum/utils"
-	"github.com/go-qml/qml"
-	"github.com/rakyll/globalconf"
-	"log"
-	"os"
-	"os/signal"
-	"path"
-	"runtime"
-)
-
-const Debug = true
-
-// Register interrupt handlers so we can stop the ethereum
-func RegisterInterupts(s *eth.Ethereum) {
-	// Buffered chan of one is enough
-	c := make(chan os.Signal, 1)
-	// Notify about interrupts for now
-	signal.Notify(c, os.Interrupt)
-	go func() {
-		for sig := range c {
-			fmt.Printf("Shutting down (%v) ... \n", sig)
-
-			s.Stop()
-		}
-	}()
-}
-
-func main() {
-	Init()
-
-	qml.Init(nil)
-
-	runtime.GOMAXPROCS(runtime.NumCPU())
-
-	g, err := globalconf.NewWithOptions(&globalconf.Options{
-		Filename: path.Join(ethutil.ApplicationFolder(Datadir), "conf.ini"),
-	})
-	if err != nil {
-		fmt.Println(err)
-	} else {
-		g.ParseAll()
-	}
-	ethutil.ReadConfig(Datadir, ethutil.LogFile|ethutil.LogStd, g, Identifier)
-
-	// Instantiated a eth stack
-	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
-	if err != nil {
-		log.Println("eth start err:", err)
-		return
-	}
-	ethereum.Port = OutboundPort
-
-	if GenAddr {
-		fmt.Println("This action overwrites your old private key. Are you sure? (y/n)")
-
-		var r string
-		fmt.Scanln(&r)
-		for ; ; fmt.Scanln(&r) {
-			if r == "n" || r == "y" {
-				break
-			} else {
-				fmt.Printf("Yes or no?", r)
-			}
-		}
-
-		if r == "y" {
-			utils.CreateKeyPair(true)
-		}
-		os.Exit(0)
-	} else {
-		if len(ImportKey) > 0 {
-			fmt.Println("This action overwrites your old private key. Are you sure? (y/n)")
-			var r string
-			fmt.Scanln(&r)
-			for ; ; fmt.Scanln(&r) {
-				if r == "n" || r == "y" {
-					break
-				} else {
-					fmt.Printf("Yes or no?", r)
-				}
-			}
-
-			if r == "y" {
-				utils.ImportPrivateKey(ImportKey)
-				os.Exit(0)
-			}
-		}
-	}
-
-	if ExportKey {
-		keyPair := ethutil.GetKeyRing().Get(0)
-		fmt.Printf(`
-Generating new address and keypair.
-Please keep your keys somewhere save.
-
-++++++++++++++++ KeyRing +++++++++++++++++++
-addr: %x
-prvk: %x
-pubk: %x
-++++++++++++++++++++++++++++++++++++++++++++
-save these words so you can restore your account later: %s
-`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)
-
-		os.Exit(0)
-	}
-
-	if ShowGenesis {
-		fmt.Println(ethereum.BlockChain().Genesis())
-		os.Exit(0)
-	}
-
-	/*
-		if StartMining {
-			utils.DoMining(ethereum)
-		}
-	*/
-
-	if StartRpc {
-		utils.DoRpc(ethereum, RpcPort)
-	}
-
-	log.Printf("Starting Ethereum GUI v%s\n", ethutil.Config.Ver)
-
-	// Set the max peers
-	ethereum.MaxPeers = MaxPeer
-
-	gui := ethui.New(ethereum)
-
-	ethereum.Start(UseSeed)
-
-	gui.Start(AssetPath)
-
-	// Wait for shutdown
-	ethereum.WaitForShutdown()
-}
diff --git a/ethereal/flags.go b/ethereal/flags.go
new file mode 100644
index 000000000..9bed38d9f
--- /dev/null
+++ b/ethereal/flags.go
@@ -0,0 +1,95 @@
+package main
+
+import (
+	"bitbucket.org/kardianos/osext"
+	"flag"
+	"fmt"
+	"github.com/ethereum/eth-go/ethlog"
+	"os"
+	"os/user"
+	"path"
+	"path/filepath"
+	"runtime"
+)
+
+var Identifier string
+var StartRpc bool
+var RpcPort int
+var UseUPnP bool
+var OutboundPort string
+var ShowGenesis bool
+var AddPeer string
+var MaxPeer int
+var GenAddr bool
+var UseSeed bool
+var ImportKey string
+var ExportKey bool
+var NonInteractive bool
+var Datadir string
+var LogFile string
+var ConfigFile string
+var DebugFile string
+var LogLevel int
+
+// flags specific to gui client
+var AssetPath string
+
+func defaultAssetPath() string {
+	var assetPath string
+	// If the current working directory is the go-ethereum dir
+	// assume a debug build and use the source directory as
+	// asset directory.
+	pwd, _ := os.Getwd()
+	if pwd == path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "ethereal") {
+		assetPath = path.Join(pwd, "assets")
+	} else {
+		switch runtime.GOOS {
+		case "darwin":
+			// Get Binary Directory
+			exedir, _ := osext.ExecutableFolder()
+			assetPath = filepath.Join(exedir, "../Resources")
+		case "linux":
+			assetPath = "/usr/share/ethereal"
+		case "window":
+			fallthrough
+		default:
+			assetPath = "."
+		}
+	}
+	return assetPath
+}
+
+func defaultDataDir() string {
+	usr, _ := user.Current()
+	return path.Join(usr.HomeDir, ".ethereal")
+}
+
+var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini")
+
+func Init() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "%s [options] [filename]:\noptions precedence: default < config file < environment variables < command line\n", os.Args[0])
+		flag.PrintDefaults()
+	}
+
+	flag.StringVar(&Identifier, "id", "", "Custom client identifier")
+	flag.StringVar(&OutboundPort, "port", "30303", "listening port")
+	flag.BoolVar(&UseUPnP, "upnp", false, "enable UPnP support")
+	flag.IntVar(&MaxPeer, "maxpeer", 10, "maximum desired peers")
+	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
+	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
+	flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)")
+	flag.BoolVar(&UseSeed, "seed", true, "seed peers")
+	flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
+	flag.BoolVar(&ExportKey, "export", false, "export private key")
+	flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
+	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
+	flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use")
+	flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file")
+	flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)")
+	flag.IntVar(&LogLevel, "loglevel", int(ethlog.InfoLevel), "loglevel: 0-5: silent,error,warn,info,debug,debug detail)")
+
+	flag.StringVar(&AssetPath, "asset_path", defaultAssetPath(), "absolute path to GUI assets directory")
+
+	flag.Parse()
+}
diff --git a/ethereal/main.go b/ethereal/main.go
new file mode 100644
index 000000000..799b50e4b
--- /dev/null
+++ b/ethereal/main.go
@@ -0,0 +1,61 @@
+package main
+
+import (
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/go-ethereum/ethereal/ui"
+	"github.com/ethereum/go-ethereum/utils"
+	"github.com/go-qml/qml"
+	"os"
+	"runtime"
+)
+
+func main() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	qml.Init(nil)
+
+	var interrupted = false
+	utils.RegisterInterrupt(func(os.Signal) {
+		interrupted = true
+	})
+
+	utils.HandleInterrupt()
+
+	// precedence: code-internal flag default < config file < environment variables < command line
+	Init() // parsing command line
+	utils.InitConfig(ConfigFile, Datadir, Identifier, "ETH")
+
+	utils.InitDataDir(Datadir)
+
+	utils.InitLogging(Datadir, LogFile, LogLevel, DebugFile)
+
+	ethereum := utils.NewEthereum(UseUPnP, OutboundPort, MaxPeer)
+
+	// create, import, export keys
+	utils.KeyTasks(GenAddr, ImportKey, ExportKey, NonInteractive)
+
+	if ShowGenesis {
+		utils.ShowGenesis(ethereum)
+	}
+
+	if StartRpc {
+		utils.StartRpc(ethereum, RpcPort)
+	}
+
+	gui := ethui.New(ethereum, LogLevel)
+
+	utils.RegisterInterrupt(func(os.Signal) {
+		gui.Stop()
+	})
+	utils.StartEthereum(ethereum, UseSeed)
+	// gui blocks the main thread
+	gui.Start(AssetPath)
+	// we need to run the interrupt callbacks in case gui is closed
+	// this skips if we got here by actual interrupt stopping the GUI
+	if !interrupted {
+		utils.RunInterruptCallbacks(os.Interrupt)
+	}
+	// this blocks the thread
+	ethereum.WaitForShutdown()
+	ethlog.Flush()
+}
diff --git a/ethereal/ui/gui.go b/ethereal/ui/gui.go
index 7b59e2fbc..be7b395d8 100644
--- a/ethereal/ui/gui.go
+++ b/ethereal/ui/gui.go
@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethdb"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/go-ethereum/utils"
@@ -15,6 +16,8 @@ import (
 	"time"
 )
 
+var logger = ethlog.NewLogger("GUI")
+
 type Gui struct {
 	// The main application window
 	win *qml.Window
@@ -32,11 +35,13 @@ type Gui struct {
 
 	addr []byte
 
-	pub *ethpub.PEthereum
+	pub      *ethpub.PEthereum
+	logLevel ethlog.LogLevel
+	open     bool
 }
 
 // Create GUI, but doesn't start it
-func New(ethereum *eth.Ethereum) *Gui {
+func New(ethereum *eth.Ethereum, logLevel int) *Gui {
 	lib := &EthLib{stateManager: ethereum.StateManager(), blockChain: ethereum.BlockChain(), txPool: ethereum.TxPool()}
 	db, err := ethdb.NewLDBDatabase("tx_database")
 	if err != nil {
@@ -52,7 +57,7 @@ func New(ethereum *eth.Ethereum) *Gui {
 
 	pub := ethpub.NewPEthereum(ethereum)
 
-	return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr, pub: pub}
+	return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr, pub: pub, logLevel: ethlog.LogLevel(logLevel), open: false}
 }
 
 func (gui *Gui) Start(assetPath string) {
@@ -86,25 +91,39 @@ func (gui *Gui) Start(assetPath string) {
 
 	var win *qml.Window
 	var err error
+	var addlog = false
 	if len(data) == 0 {
 		win, err = gui.showKeyImport(context)
 	} else {
 		win, err = gui.showWallet(context)
-
-		ethutil.Config.Log.AddLogSystem(gui)
+		addlog = true
 	}
 	if err != nil {
-		ethutil.Config.Log.Infoln("FATAL: asset not found: you can set an alternative asset path on on the command line using option 'asset_path'", err)
+		logger.Errorln("asset not found: you can set an alternative asset path on the command line using option 'asset_path'", err)
 
 		panic(err)
 	}
 
-	ethutil.Config.Log.Infoln("[GUI] Starting GUI")
-
+	logger.Infoln("Starting GUI")
+	gui.open = true
 	win.Show()
+	// only add the gui logger after window is shown otherwise slider wont be shown
+	if addlog {
+		ethlog.AddLogSystem(gui)
+	}
 	win.Wait()
+	// need to silence gui logger after window closed otherwise logsystem hangs
+	gui.SetLogLevel(ethlog.Silence)
+	gui.open = false
+}
 
-	gui.eth.Stop()
+func (gui *Gui) Stop() {
+	if gui.open {
+		gui.SetLogLevel(ethlog.Silence)
+		gui.open = false
+		gui.win.Hide()
+	}
+	logger.Infoln("Stopped")
 }
 
 func (gui *Gui) ToggleMining() {
@@ -311,22 +330,6 @@ func (gui *Gui) setPeerInfo() {
 	}
 }
 
-// Logging functions that log directly to the GUI interface
-func (gui *Gui) Println(v ...interface{}) {
-	str := strings.TrimRight(fmt.Sprintln(v...), "\n")
-	lines := strings.Split(str, "\n")
-	for _, line := range lines {
-		gui.win.Root().Call("addLog", line)
-	}
-}
-
-func (gui *Gui) Printf(format string, v ...interface{}) {
-	str := strings.TrimRight(fmt.Sprintf(format, v...), "\n")
-	lines := strings.Split(str, "\n")
-	for _, line := range lines {
-		gui.win.Root().Call("addLog", line)
-	}
-}
 func (gui *Gui) RegisterName(name string) {
 	keyPair := ethutil.GetKeyRing().Get(0)
 	name = fmt.Sprintf("\"%s\"\n1", name)
@@ -353,6 +356,34 @@ func (gui *Gui) ClientId() string {
 	return ethutil.Config.Identifier
 }
 
-func (gui *Gui) SetLogLevel(level int) {
-	ethutil.Config.Log.SetLevel(level)
+// functions that allow Gui to implement interface ethlog.LogSystem
+func (gui *Gui) SetLogLevel(level ethlog.LogLevel) {
+	gui.logLevel = level
+}
+
+func (gui *Gui) GetLogLevel() ethlog.LogLevel {
+	return gui.logLevel
+}
+
+// this extra function needed to give int typecast value to gui widget
+// that sets initial loglevel to default
+func (gui *Gui) GetLogLevelInt() int {
+	return int(gui.logLevel)
+}
+
+func (gui *Gui) Println(v ...interface{}) {
+	gui.printLog(fmt.Sprintln(v...))
+}
+
+func (gui *Gui) Printf(format string, v ...interface{}) {
+	gui.printLog(fmt.Sprintf(format, v...))
+}
+
+// Print function that logs directly to the GUI
+func (gui *Gui) printLog(s string) {
+	str := strings.TrimRight(s, "\n")
+	lines := strings.Split(str, "\n")
+	for _, line := range lines {
+		gui.win.Root().Call("addLog", line)
+	}
 }
diff --git a/ethereal/ui/html_container.go b/ethereal/ui/html_container.go
index 3867c0353..d7dc80af7 100644
--- a/ethereal/ui/html_container.go
+++ b/ethereal/ui/html_container.go
@@ -96,11 +96,11 @@ func (app *HtmlApplication) NewWatcher(quitChan chan bool) {
 				app.watcher.Close()
 				break out
 			case <-app.watcher.Event:
-				//ethutil.Config.Log.Debugln("Got event:", ev)
+				//logger.Debugln("Got event:", ev)
 				app.webView.Call("reload")
 			case err := <-app.watcher.Error:
 				// TODO: Do something here
-				ethutil.Config.Log.Infoln("Watcher error:", err)
+				logger.Infoln("Watcher error:", err)
 			}
 		}
 	}()
diff --git a/ethereal/ui/qml_app.go b/ethereal/ui/qml_app.go
index d47751616..39ab7f922 100644
--- a/ethereal/ui/qml_app.go
+++ b/ethereal/ui/qml_app.go
@@ -22,7 +22,7 @@ func NewQmlApplication(path string, lib *UiLib) *QmlApplication {
 func (app *QmlApplication) Create() error {
 	component, err := app.engine.LoadFile(app.path)
 	if err != nil {
-		ethutil.Config.Log.Debugln(err)
+		logger.Warnln(err)
 	}
 	app.win = component.CreateWindow(nil)
 
diff --git a/ethereal/ui/ui_lib.go b/ethereal/ui/ui_lib.go
index 908497be3..ddc955176 100644
--- a/ethereal/ui/ui_lib.go
+++ b/ethereal/ui/ui_lib.go
@@ -1,14 +1,10 @@
 package ethui
 
 import (
-	"bitbucket.org/kardianos/osext"
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/go-qml/qml"
-	"os"
 	"path"
-	"path/filepath"
-	"runtime"
 )
 
 type memAddr struct {
@@ -29,9 +25,6 @@ type UiLib struct {
 }
 
 func NewUiLib(engine *qml.Engine, eth *eth.Ethereum, assetPath string) *UiLib {
-	if assetPath == "" {
-		assetPath = DefaultAssetPath()
-	}
 	return &UiLib{engine: engine, eth: eth, assetPath: assetPath}
 }
 
@@ -52,7 +45,7 @@ func (ui *UiLib) OpenHtml(path string) {
 func (ui *UiLib) Muted(content string) {
 	component, err := ui.engine.LoadFile(ui.AssetPath("qml/muted.qml"))
 	if err != nil {
-		ethutil.Config.Log.Debugln(err)
+		logger.Debugln(err)
 
 		return
 	}
@@ -81,6 +74,7 @@ func (ui *UiLib) ConnectToPeer(addr string) {
 func (ui *UiLib) AssetPath(p string) string {
 	return path.Join(ui.assetPath, p)
 }
+
 func (self *UiLib) StartDbWithContractAndData(contractHash, data string) {
 	dbWindow := NewDebuggerWindow(self)
 	object := self.eth.StateManager().CurrentState().GetStateObject(ethutil.FromHex(contractHash))
@@ -104,29 +98,3 @@ func (self *UiLib) StartDebugger() {
 
 	dbWindow.Show()
 }
-
-func DefaultAssetPath() string {
-	var base string
-	// If the current working directory is the go-ethereum dir
-	// assume a debug build and use the source directory as
-	// asset directory.
-	pwd, _ := os.Getwd()
-	if pwd == path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "ethereal") {
-		base = path.Join(pwd, "assets")
-	} else {
-		switch runtime.GOOS {
-		case "darwin":
-			// Get Binary Directory
-			exedir, _ := osext.ExecutableFolder()
-			base = filepath.Join(exedir, "../Resources")
-		case "linux":
-			base = "/usr/share/ethereal"
-		case "window":
-			fallthrough
-		default:
-			base = "."
-		}
-	}
-
-	return base
-}
diff --git a/ethereum/cmd.go b/ethereum/cmd.go
new file mode 100644
index 000000000..08147824d
--- /dev/null
+++ b/ethereum/cmd.go
@@ -0,0 +1,32 @@
+package main
+
+import (
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/go-ethereum/utils"
+	"io/ioutil"
+	"os"
+)
+
+func InitJsConsole(ethereum *eth.Ethereum) {
+	repl := NewJSRepl(ethereum)
+	go repl.Start()
+	utils.RegisterInterrupt(func(os.Signal) {
+		repl.Stop()
+	})
+}
+
+func ExecJsFile(ethereum *eth.Ethereum, InputFile string) {
+	file, err := os.Open(InputFile)
+	if err != nil {
+		logger.Fatalln(err)
+	}
+	content, err := ioutil.ReadAll(file)
+	if err != nil {
+		logger.Fatalln(err)
+	}
+	re := NewJSRE(ethereum)
+	utils.RegisterInterrupt(func(os.Signal) {
+		re.Stop()
+	})
+	re.Run(string(content))
+}
diff --git a/ethereum/ethereum.go b/ethereum/ethereum.go
deleted file mode 100644
index 8812e0a60..000000000
--- a/ethereum/ethereum.go
+++ /dev/null
@@ -1,193 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"github.com/ethereum/eth-go"
-	"github.com/ethereum/eth-go/ethutil"
-	"github.com/ethereum/go-ethereum/utils"
-	"github.com/rakyll/globalconf"
-	"io/ioutil"
-	"log"
-	"os"
-	"os/signal"
-	"path"
-	"runtime"
-	"strings"
-)
-
-const Debug = true
-
-func RegisterInterrupt(cb func(os.Signal)) {
-	go func() {
-		// Buffered chan of one is enough
-		c := make(chan os.Signal, 1)
-		// Notify about interrupts for now
-		signal.Notify(c, os.Interrupt)
-
-		for sig := range c {
-			cb(sig)
-		}
-	}()
-}
-
-func confirm(message string) bool {
-	fmt.Println(message, "Are you sure? (y/n)")
-	var r string
-	fmt.Scanln(&r)
-	for ; ; fmt.Scanln(&r) {
-		if r == "n" || r == "y" {
-			break
-		} else {
-			fmt.Printf("Yes or no?", r)
-		}
-	}
-	return r == "y"
-}
-
-func main() {
-	Init()
-
-	runtime.GOMAXPROCS(runtime.NumCPU())
-
-	// set logger
-	var logSys *log.Logger
-	flags := log.LstdFlags
-
-	var lt ethutil.LoggerType
-	if StartJsConsole || len(InputFile) > 0 {
-		lt = ethutil.LogFile
-	} else {
-		lt = ethutil.LogFile | ethutil.LogStd
-	}
-
-	g, err := globalconf.NewWithOptions(&globalconf.Options{
-		Filename: path.Join(ethutil.ApplicationFolder(Datadir), "conf.ini"),
-	})
-	if err != nil {
-		fmt.Println(err)
-	} else {
-		g.ParseAll()
-	}
-	ethutil.ReadConfig(Datadir, lt, g, Identifier)
-
-	logger := ethutil.Config.Log
-
-	if LogFile != "" {
-		logfile, err := os.OpenFile(LogFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
-		if err != nil {
-			panic(fmt.Sprintf("error opening log file '%s': %v", LogFile, err))
-		}
-		defer logfile.Close()
-		log.SetOutput(logfile)
-		logSys = log.New(logfile, "", flags)
-		logger.AddLogSystem(logSys)
-	} else {
-		logSys = log.New(os.Stdout, "", flags)
-	}
-
-	// Instantiated a eth stack
-	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
-	if err != nil {
-		log.Println("eth start err:", err)
-		return
-	}
-	ethereum.Port = OutboundPort
-
-	// bookkeeping tasks
-	switch {
-	case GenAddr:
-		if NonInteractive || confirm("This action overwrites your old private key.") {
-			utils.CreateKeyPair(true)
-		}
-		os.Exit(0)
-	case len(ImportKey) > 0:
-		if NonInteractive || confirm("This action overwrites your old private key.") {
-			mnemonic := strings.Split(ImportKey, " ")
-			if len(mnemonic) == 24 {
-				logSys.Println("Got mnemonic key, importing.")
-				key := ethutil.MnemonicDecode(mnemonic)
-				utils.ImportPrivateKey(key)
-			} else if len(mnemonic) == 1 {
-				logSys.Println("Got hex key, importing.")
-				utils.ImportPrivateKey(ImportKey)
-			} else {
-				logSys.Println("Did not recognise format, exiting.")
-			}
-		}
-		os.Exit(0)
-	case ExportKey:
-		keyPair := ethutil.GetKeyRing().Get(0)
-		fmt.Printf(`
-Generating new address and keypair.
-Please keep your keys somewhere save.
-
-++++++++++++++++ KeyRing +++++++++++++++++++
-addr: %x
-prvk: %x
-pubk: %x
-++++++++++++++++++++++++++++++++++++++++++++
-save these words so you can restore your account later: %s
-`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)
-
-		os.Exit(0)
-	case ShowGenesis:
-		logSys.Println(ethereum.BlockChain().Genesis())
-		os.Exit(0)
-	default:
-		// Creates a keypair if non exists
-		utils.CreateKeyPair(false)
-	}
-
-	// client
-	logger.Infoln(fmt.Sprintf("Starting Ethereum v%s", ethutil.Config.Ver))
-
-	// Set the max peers
-	ethereum.MaxPeers = MaxPeer
-
-	// Set Mining status
-	ethereum.Mining = StartMining
-
-	if StartMining {
-		utils.DoMining(ethereum)
-	}
-
-	if StartJsConsole {
-		repl := NewJSRepl(ethereum)
-
-		go repl.Start()
-
-		RegisterInterrupt(func(os.Signal) {
-			repl.Stop()
-		})
-	} else if len(InputFile) > 0 {
-		file, err := os.Open(InputFile)
-		if err != nil {
-			ethutil.Config.Log.Fatal(err)
-		}
-
-		content, err := ioutil.ReadAll(file)
-		if err != nil {
-			ethutil.Config.Log.Fatal(err)
-		}
-
-		re := NewJSRE(ethereum)
-		RegisterInterrupt(func(os.Signal) {
-			re.Stop()
-		})
-		re.Run(string(content))
-	}
-
-	if StartRpc {
-		utils.DoRpc(ethereum, RpcPort)
-	}
-
-	RegisterInterrupt(func(sig os.Signal) {
-		fmt.Printf("Shutting down (%v) ... \n", sig)
-		ethereum.Stop()
-	})
-
-	ethereum.Start(UseSeed)
-
-	// Wait for shutdown
-	ethereum.WaitForShutdown()
-}
diff --git a/ethereum/config.go b/ethereum/flags.go
index a80b47a8e..8fb87cf34 100644
--- a/ethereum/config.go
+++ b/ethereum/flags.go
@@ -3,11 +3,13 @@ package main
 import (
 	"flag"
 	"fmt"
+	"github.com/ethereum/eth-go/ethlog"
 	"os"
+	"os/user"
+	"path"
 )
 
 var Identifier string
-var StartMining bool
 var StartRpc bool
 var RpcPort int
 var UseUPnP bool
@@ -19,16 +21,28 @@ var GenAddr bool
 var UseSeed bool
 var ImportKey string
 var ExportKey bool
-var LogFile string
 var NonInteractive bool
+var Datadir string
+var LogFile string
+var ConfigFile string
+var DebugFile string
+var LogLevel int
+
+// flags specific to cli client
+var StartMining bool
 var StartJsConsole bool
 var InputFile string
 
-var Datadir string
+func defaultDataDir() string {
+	usr, _ := user.Current()
+	return path.Join(usr.HomeDir, ".ethereum")
+}
+
+var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini")
 
 func Init() {
 	flag.Usage = func() {
-		fmt.Fprintf(os.Stderr, "%s [options] [filename]:\n", os.Args[0])
+		fmt.Fprintf(os.Stderr, "%s [options] [filename]:\noptions precedence: default < config file < environment variables < command line\n", os.Args[0])
 		flag.PrintDefaults()
 	}
 
@@ -38,17 +52,19 @@ func Init() {
 	flag.IntVar(&MaxPeer, "maxpeer", 10, "maximum desired peers")
 	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
 	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
-	flag.BoolVar(&StartJsConsole, "js", false, "exp")
-
-	flag.BoolVar(&StartMining, "mine", false, "start dagger mining")
 	flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)")
 	flag.BoolVar(&UseSeed, "seed", true, "seed peers")
 	flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
 	flag.BoolVar(&ExportKey, "export", false, "export private key")
 	flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
 	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
+	flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use")
+	flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file")
+	flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)")
+	flag.IntVar(&LogLevel, "loglevel", int(ethlog.InfoLevel), "loglevel: 0-5: silent,error,warn,info,debug,debug detail)")
 
-	flag.StringVar(&Datadir, "datadir", ".ethereum", "specifies the datadir to use. Takes precedence over config file.")
+	flag.BoolVar(&StartMining, "mine", false, "start dagger mining")
+	flag.BoolVar(&StartJsConsole, "js", false, "launches javascript console")
 
 	flag.Parse()
 
diff --git a/ethereum/javascript_runtime.go b/ethereum/javascript_runtime.go
index a9b12629a..0dfe07a54 100644
--- a/ethereum/javascript_runtime.go
+++ b/ethereum/javascript_runtime.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/go-ethereum/utils"
@@ -14,6 +15,8 @@ import (
 	"path/filepath"
 )
 
+var jsrelogger = ethlog.NewLogger("JSRE")
+
 type JSRE struct {
 	ethereum *eth.Ethereum
 	vm       *otto.Otto
@@ -31,7 +34,7 @@ func (jsre *JSRE) LoadExtFile(path string) {
 	if err == nil {
 		jsre.vm.Run(result)
 	} else {
-		ethutil.Config.Log.Debugln("Could not load file:", path)
+		jsrelogger.Debugln("Could not load file:", path)
 	}
 }
 
@@ -65,6 +68,8 @@ func NewJSRE(ethereum *eth.Ethereum) *JSRE {
 
 	re.initStdFuncs()
 
+	jsrelogger.Infoln("started")
+
 	return re
 }
 
@@ -99,6 +104,7 @@ func (self *JSRE) Stop() {
 	close(self.blockChan)
 	close(self.quitChan)
 	close(self.changeChan)
+	jsrelogger.Infoln("stopped")
 }
 
 func (self *JSRE) mainLoop() {
diff --git a/ethereum/main.go b/ethereum/main.go
new file mode 100644
index 000000000..6b1995eec
--- /dev/null
+++ b/ethereum/main.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/go-ethereum/utils"
+	"runtime"
+)
+
+var logger = ethlog.NewLogger("CLI")
+
+func main() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	utils.HandleInterrupt()
+
+	// precedence: code-internal flag default < config file < environment variables < command line
+	Init() // parsing command line
+	utils.InitConfig(ConfigFile, Datadir, Identifier, "ETH")
+
+	utils.InitDataDir(Datadir)
+
+	utils.InitLogging(Datadir, LogFile, LogLevel, DebugFile)
+
+	ethereum := utils.NewEthereum(UseUPnP, OutboundPort, MaxPeer)
+
+	// create, import, export keys
+	utils.KeyTasks(GenAddr, ImportKey, ExportKey, NonInteractive)
+
+	if ShowGenesis {
+		utils.ShowGenesis(ethereum)
+	}
+
+	if StartMining {
+		utils.StartMining(ethereum)
+	}
+
+	// better reworked as cases
+	if StartJsConsole {
+		InitJsConsole(ethereum)
+	} else if len(InputFile) > 0 {
+		ExecJsFile(ethereum, InputFile)
+	}
+
+	if StartRpc {
+		utils.StartRpc(ethereum, RpcPort)
+	}
+
+	utils.StartEthereum(ethereum, UseSeed)
+
+	// this blocks the thread
+	ethereum.WaitForShutdown()
+	ethlog.Flush()
+}
diff --git a/ethereum/repl.go b/ethereum/repl.go
index dd8d08179..34380a06f 100644
--- a/ethereum/repl.go
+++ b/ethereum/repl.go
@@ -23,6 +23,8 @@ type JSRepl struct {
 	prompt string
 
 	history *os.File
+
+	running bool
 }
 
 func NewJSRepl(ethereum *eth.Ethereum) *JSRepl {
@@ -35,24 +37,32 @@ func NewJSRepl(ethereum *eth.Ethereum) *JSRepl {
 }
 
 func (self *JSRepl) Start() {
-	reader := bufio.NewReader(self.history)
-	for {
-		line, err := reader.ReadString('\n')
-		if err != nil && err == io.EOF {
-			break
-		} else if err != nil {
-			fmt.Println("error reading history", err)
-			break
+	if !self.running {
+		self.running = true
+		logger.Infoln("init JS Console")
+		reader := bufio.NewReader(self.history)
+		for {
+			line, err := reader.ReadString('\n')
+			if err != nil && err == io.EOF {
+				break
+			} else if err != nil {
+				fmt.Println("error reading history", err)
+				break
+			}
+
+			addHistory(line[:len(line)-1])
 		}
-
-		addHistory(line[:len(line)-1])
+		self.read()
 	}
-	self.read()
 }
 
 func (self *JSRepl) Stop() {
-	self.re.Stop()
-	self.history.Close()
+	if self.running {
+		self.running = false
+		self.re.Stop()
+		logger.Infoln("exit JS Console")
+		self.history.Close()
+	}
 }
 
 func (self *JSRepl) parseInput(code string) {
diff --git a/utils/cmd.go b/utils/cmd.go
index 368f2381e..c084542b4 100644
--- a/utils/cmd.go
+++ b/utils/cmd.go
@@ -3,76 +3,226 @@ package utils
 import (
 	"fmt"
 	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethminer"
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethrpc"
 	"github.com/ethereum/eth-go/ethutil"
+	"io"
+	"log"
+	"os"
+	"os/signal"
+	"path"
+	"strings"
 	"time"
 )
 
-func DoRpc(ethereum *eth.Ethereum, RpcPort int) {
-	var err error
-	ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
-	if err != nil {
-		ethutil.Config.Log.Infoln("Could not start RPC interface:", err)
-	} else {
-		go ethereum.RpcServer.Start()
-	}
+var logger = ethlog.NewLogger("CLI")
+var interruptCallbacks = []func(os.Signal){}
+
+// Register interrupt handlers callbacks
+func RegisterInterrupt(cb func(os.Signal)) {
+	interruptCallbacks = append(interruptCallbacks, cb)
 }
 
-var miner ethminer.Miner
+// go routine that call interrupt handlers in order of registering
+func HandleInterrupt() {
+	c := make(chan os.Signal, 1)
+	go func() {
+		signal.Notify(c, os.Interrupt)
+		for sig := range c {
+			logger.Errorf("Shutting down (%v) ... \n", sig)
+			RunInterruptCallbacks(sig)
+		}
+	}()
+}
 
-func DoMining(ethereum *eth.Ethereum) {
-	// Set Mining status
-	ethereum.Mining = true
+func RunInterruptCallbacks(sig os.Signal) {
+	for _, cb := range interruptCallbacks {
+		cb(sig)
+	}
+}
 
-	if ethutil.GetKeyRing().Len() == 0 {
-		ethutil.Config.Log.Infoln("No address found, can't start mining")
-		return
+func AbsolutePath(Datadir string, filename string) string {
+	if path.IsAbs(filename) {
+		return filename
 	}
-	keyPair := ethutil.GetKeyRing().Get(0)
-	addr := keyPair.Address()
+	return path.Join(Datadir, filename)
+}
 
-	go func() {
-		miner = ethminer.NewDefaultMiner(addr, ethereum)
+func openLogFile(Datadir string, filename string) *os.File {
+	path := AbsolutePath(Datadir, filename)
+	file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
+	if err != nil {
+		panic(fmt.Sprintf("error opening log file '%s': %v", filename, err))
+	}
+	return file
+}
 
-		// Give it some time to connect with peers
-		time.Sleep(3 * time.Second)
+func confirm(message string) bool {
+	fmt.Println(message, "Are you sure? (y/n)")
+	var r string
+	fmt.Scanln(&r)
+	for ; ; fmt.Scanln(&r) {
+		if r == "n" || r == "y" {
+			break
+		} else {
+			fmt.Printf("Yes or no?", r)
+		}
+	}
+	return r == "y"
+}
 
-		/*
-			for ethereum.IsUpToDate() == false {
-				time.Sleep(5 * time.Second)
-			}
-		*/
+func InitDataDir(Datadir string) {
+	_, err := os.Stat(Datadir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			fmt.Printf("Debug logging directory '%s' doesn't exist, creating it\n", Datadir)
+			os.Mkdir(Datadir, 0777)
+		}
+	}
+}
 
-		ethutil.Config.Log.Infoln("Miner started")
+func InitLogging(Datadir string, LogFile string, LogLevel int, DebugFile string) {
+	var writer io.Writer
+	if LogFile == "" {
+		writer = os.Stdout
+	} else {
+		writer = openLogFile(Datadir, LogFile)
+	}
+	ethlog.AddLogSystem(ethlog.NewStdLogSystem(writer, log.LstdFlags, ethlog.LogLevel(LogLevel)))
+	if DebugFile != "" {
+		writer = openLogFile(Datadir, DebugFile)
+		ethlog.AddLogSystem(ethlog.NewStdLogSystem(writer, log.LstdFlags, ethlog.DebugLevel))
+	}
+}
 
-		miner := ethminer.NewDefaultMiner(addr, ethereum)
-		miner.Start()
-	}()
+func InitConfig(ConfigFile string, Datadir string, Identifier string, EnvPrefix string) {
+	InitDataDir(Datadir)
+	ethutil.ReadConfig(ConfigFile, Datadir, Identifier, EnvPrefix)
+	ethutil.Config.Set("rpcport", "700")
 }
 
-func StopMining(ethereum *eth.Ethereum) bool {
-	if ethereum.Mining {
-		miner.Stop()
+func exit(status int) {
+	ethlog.Flush()
+	os.Exit(status)
+}
 
-		ethutil.Config.Log.Infoln("Miner stopped")
+func NewEthereum(UseUPnP bool, OutboundPort string, MaxPeer int) *eth.Ethereum {
+	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
+	if err != nil {
+		logger.Fatalln("eth start err:", err)
+	}
+	ethereum.Port = OutboundPort
+	ethereum.MaxPeers = MaxPeer
+	return ethereum
+}
 
-		ethereum.Mining = false
+func StartEthereum(ethereum *eth.Ethereum, UseSeed bool) {
+	logger.Infof("Starting Ethereum v%s", ethutil.Config.Ver)
+	ethereum.Start(UseSeed)
+	RegisterInterrupt(func(sig os.Signal) {
+		ethereum.Stop()
+		ethlog.Flush()
+	})
+}
 
-		return true
+func ShowGenesis(ethereum *eth.Ethereum) {
+	logger.Infoln(ethereum.BlockChain().Genesis())
+	exit(0)
+}
+
+func KeyTasks(GenAddr bool, ImportKey string, ExportKey bool, NonInteractive bool) {
+	switch {
+	case GenAddr:
+		if NonInteractive || confirm("This action overwrites your old private key.") {
+			CreateKeyPair(true)
+		}
+		exit(0)
+	case len(ImportKey) > 0:
+		if NonInteractive || confirm("This action overwrites your old private key.") {
+			// import should be from file
+			mnemonic := strings.Split(ImportKey, " ")
+			if len(mnemonic) == 24 {
+				logger.Infoln("Got mnemonic key, importing.")
+				key := ethutil.MnemonicDecode(mnemonic)
+				ImportPrivateKey(key)
+			} else if len(mnemonic) == 1 {
+				logger.Infoln("Got hex key, importing.")
+				ImportPrivateKey(ImportKey)
+			} else {
+				logger.Errorln("Did not recognise format, exiting.")
+			}
+		}
+		exit(0)
+	case ExportKey: // this should be exporting to a filename
+		keyPair := ethutil.GetKeyRing().Get(0)
+		fmt.Printf(`
+Generating new address and keypair.
+Please keep your keys somewhere save.
+
+++++++++++++++++ KeyRing +++++++++++++++++++
+addr: %x
+prvk: %x
+pubk: %x
+++++++++++++++++++++++++++++++++++++++++++++
+save these words so you can restore your account later: %s
+`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)
+
+		exit(0)
+	default:
+		// Creates a keypair if none exists
+		CreateKeyPair(false)
 	}
+}
 
-	return false
+func StartRpc(ethereum *eth.Ethereum, RpcPort int) {
+	var err error
+	ethereum.RpcServer, err = ethrpc.NewJsonRpcServer(ethpub.NewPEthereum(ethereum), RpcPort)
+	if err != nil {
+		logger.Errorf("Could not start RPC interface (port %v): %v", RpcPort, err)
+	} else {
+		go ethereum.RpcServer.Start()
+	}
 }
 
+var miner ethminer.Miner
+
 func StartMining(ethereum *eth.Ethereum) bool {
 	if !ethereum.Mining {
-		DoMining(ethereum)
-
+		ethereum.Mining = true
+
+		if ethutil.GetKeyRing().Len() == 0 {
+			logger.Errorln("No address found, can't start mining")
+			ethereum.Mining = false
+			return true //????
+		}
+		keyPair := ethutil.GetKeyRing().Get(0)
+		addr := keyPair.Address()
+
+		go func() {
+			miner = ethminer.NewDefaultMiner(addr, ethereum)
+			// Give it some time to connect with peers
+			time.Sleep(3 * time.Second)
+			logger.Infoln("Miner started")
+			miner := ethminer.NewDefaultMiner(addr, ethereum)
+			miner.Start()
+		}()
+		RegisterInterrupt(func(os.Signal) {
+			StopMining(ethereum)
+		})
 		return true
 	}
+	return false
+}
 
+func StopMining(ethereum *eth.Ethereum) bool {
+	if ethereum.Mining {
+		miner.Stop()
+		logger.Infoln("Miner stopped")
+		ethereum.Mining = false
+		return true
+	}
 	return false
 }