new: -silent and -debug are now mapped to log.silent and log.debug that can be set at runtime (fixes #50).

session/environment.go

@@ -9,11 +9,15 @@ import (
 	"github.com/evilsocket/bettercap-ng/core"
 )
 
+type SetCallback func(newValue string)
+
 type Environment struct {
 	sync.Mutex
 
 	Padding int               `json:"-"`
 	Storage map[string]string `json:"storage"`
+
+	cbs  map[string]SetCallback
 	sess *Session
 }
 
@@ -22,6 +26,7 @@ func NewEnvironment(s *Session) *Environment {
 		Padding: 0,
 		Storage: make(map[string]string),
 		sess:    s,
+		cbs:     make(map[string]SetCallback),
 	}
 
 	return env
@@ -36,6 +41,18 @@ func (env *Environment) Has(name string) bool {
 	return found
 }
 
+func (env *Environment) SetCallback(name string, cb SetCallback) {
+	env.Lock()
+	defer env.Unlock()
+	env.cbs[name] = cb
+}
+
+func (env *Environment) WithCallback(name, value string, cb SetCallback) string {
+	ret := env.Set(name, value)
+	env.SetCallback(name, cb)
+	return ret
+}
+
 func (env *Environment) Set(name, value string) string {
 	env.Lock()
 	defer env.Unlock()
@@ -43,6 +60,10 @@ func (env *Environment) Set(name, value string) string {
 	old, _ := env.Storage[name]
 	env.Storage[name] = value
 
+	if cb, hasCallback := env.cbs[name]; hasCallback == true {
+		cb(value)
+	}
+
 	env.sess.Events.Log(core.DEBUG, "env.change: %s -> '%s'", name, value)
 
 	width := len(name)

session/events.go

@@ -54,6 +54,18 @@ func NewEventPool(debug bool, silent bool) *EventPool {
 	}
 }
 
+func (p *EventPool) SetSilent(s bool) {
+	p.Lock()
+	defer p.Unlock()
+	p.silent = s
+}
+
+func (p *EventPool) SetDebug(d bool) {
+	p.Lock()
+	defer p.Unlock()
+	p.debug = d
+}
+
 func (p *EventPool) Add(tag string, data interface{}) {
 	p.Lock()
 	defer p.Unlock()

session/session.go

@@ -272,6 +272,30 @@ func (s *Session) setupEnv() {
 	s.Env.Set("iface.mac", s.Interface.HwAddress)
 	s.Env.Set("gateway.address", s.Gateway.IpAddress)
 	s.Env.Set("gateway.mac", s.Gateway.HwAddress)
+
+	dbg := "false"
+	if *s.Options.Debug {
+		dbg = "true"
+	}
+	s.Env.WithCallback("log.debug", dbg, func(newValue string) {
+		newDbg := false
+		if newValue == "true" {
+			newDbg = true
+		}
+		s.Events.SetDebug(newDbg)
+	})
+
+	silent := "false"
+	if *s.Options.Silent {
+		silent = "true"
+	}
+	s.Env.WithCallback("log.silent", silent, func(newValue string) {
+		newSilent := false
+		if newValue == "true" {
+			newSilent = true
+		}
+		s.Events.SetSilent(newSilent)
+	})
 }
 
 func (s *Session) Start() error {