properly shutdown of clients

src/dumm/dumm.c

@@ -24,6 +24,7 @@ typedef struct private_dumm_t private_dumm_t;
 struct private_dumm_t {
 	dumm_t public;
 	linked_list_t *guests;
+	bool destroying;
 };
 
 static guest_t* create_guest(private_dumm_t *this, char *name, char *master, int mem)
@@ -48,6 +49,11 @@ static iterator_t* create_guest_iterator(private_dumm_t *this)
  */
 static void sigchild_handler(private_dumm_t *this, siginfo_t *info)
 {
+	if (this->destroying)
+	{
+		return;
+	}
+
 	switch (info->si_code)
 	{
 		case CLD_EXITED:
@@ -77,6 +83,17 @@ static void sigchild_handler(private_dumm_t *this, siginfo_t *info)
 
 static void destroy(private_dumm_t *this)
 {
+	iterator_t *iterator;
+	guest_t *guest;
+
+	iterator = this->guests->create_iterator(this->guests, TRUE);
+	while (iterator->iterate(iterator, (void**)&guest))
+	{
+		guest->stop(guest);
+	}
+	iterator->destroy(iterator);
+	
+	this->destroying = TRUE;
 	this->guests->destroy_offset(this->guests, offsetof(guest_t, destroy));
 	free(this);
 }
@@ -110,6 +127,7 @@ dumm_t *dumm_create()
 		return NULL;
 	}
 	
+	this->destroying = FALSE;
 	this->guests = linked_list_create();
 	return &this->public;
 }

src/dumm/guest.c

@@ -227,10 +227,10 @@ static void stop(private_guest_t *this)
 {
 	if (this->state != GUEST_STOPPED)
 	{
+		this->state = GUEST_STOPPING;
 		this->ifaces->destroy_offset(this->ifaces, offsetof(iface_t, destroy));
 		this->ifaces = linked_list_create();
 		kill(this->pid, SIGINT);
-		this->state = GUEST_STOPPING;
 		while (this->state == GUEST_STOPPING)
 		{
 			sched_yield();
@@ -243,6 +243,8 @@ static void stop(private_guest_t *this)
  */
 static void sigchild(private_guest_t *this)
 {
+	DESTROY_IF(this->mconsole);
+	this->mconsole = NULL;
 	this->state = GUEST_STOPPED;
 	this->pid = 0;
 }
@@ -341,7 +343,6 @@ static void destroy(private_guest_t *this)
 {
 	stop(this);
 	umount_unionfs(this->name);
-	DESTROY_IF(this->mconsole);
 	free(this->name);
 	free(this->master);
 	free(this);

src/dumm/main.c

@@ -395,10 +395,7 @@ void signal_action(int sig, siginfo_t *info, void *ucontext)
 	}
 	else
 	{
-		dumm->destroy(dumm);
-		clear_history();
-		printf("\n");
-		exit(0);
+		printf("\nuse 'quit'\ndumm# ");
 	}
 }