add getBridgeMembers(), Fix Vnet on by default

cmd/utils.go

@@ -228,7 +228,7 @@ CreateBootEnv no
     "type": "jail",
     "used": "readonly",
     "vmemoryuse": "off",
-    "vnet": 0,
+    "vnet": 1,
     "vnet0_mac": "none",
     "vnet1_mac": "none",
     "vnet2_mac": "none",
@@ -751,6 +751,30 @@ func executeScript(script string) (string, error) {
 	return string(out), err
 }
 
+/*****************************************************************************
+ *
+ * Network related operations
+ *
+ *****************************************************************************/
+func getBridgeMembers(bridge string) ([]string, error) {
+	var members []string
+	cmd := fmt.Sprintf("/sbin/ifconfig %s", bridge)
+	out, err := executeCommand(cmd)
+	if err != nil {
+		return members, errors.New(fmt.Sprintf("%v; command returned \"%s\"", err, out))
+	}
+
+	for _, line := range strings.Split(out, "\n") {
+		if strings.HasPrefix(strings.TrimLeft(line, " \t"), "member:") {
+			m := strings.Split(strings.TrimLeft(strings.Split(line, ":")[1], " "), " ")[0]
+			log.Debugf("%s is member of %s\n", m, bridge)
+			members = append(members, m)
+		}
+	}
+	return members, nil
+}
+
+
 /*****************************************************************************
 *
 * ZFS datasets/pools operations
@@ -1033,6 +1057,7 @@ func addRcKeyValue(rcconfpath string, key string, value string) error {
 	}
 	return nil
 }
+
 /*****************************************************************************
 * Parse an fstab file, returning an array of Mount
 *****************************************************************************/