elput: Add API function to switch to a given vt

This patch adds a new API function to Elput that can be used to switch
to a given VT. This allows drm2 or enlightenment to switch to a given
virtual terminal in response to keybindings.

@feature

Signed-off-by: Chris Michael <cpmichael@osg.samsung.com>

src/lib/elput/Elput.h

@@ -205,6 +205,19 @@ EAPI int elput_manager_open(Elput_Manager *manager, const char *path, int flags)
  */
 EAPI void elput_manager_close(Elput_Manager *manager, int fd);
 
+/**
+ * Request to switch to a given vt
+ *
+ * @param manager
+ * @param vt
+ *
+ * @return EINA_TRUE on success, EINA_FALSE otherwise
+ *
+ * @ingroup Elput_Manager_Group
+ * @since 1.18
+ */
+EAPI Eina_Bool elput_manager_vt_set(Elput_Manager *manager, int vt);
+
 /**
  * @defgroup Elput_Input_Group Elput input functions
  *

src/lib/elput/elput_logind.c

@@ -574,12 +574,62 @@ _logind_close(Elput_Manager *em, int fd)
    _logind_device_release(em, major(st.st_rdev), minor(st.st_rdev));
 }
 
+static Eina_Bool
+_logind_vt_set(Elput_Manager *em, int vt)
+{
+   Eldbus_Object *obj;
+   Eldbus_Proxy *proxy;
+   Eldbus_Message *msg;
+   char self[PATH_MAX];
+
+   snprintf(self, sizeof(self), "/org/freedesktop/login1/seat/self");
+
+   obj = eldbus_object_get(em->dbus.conn, "org.freedesktop.login1", self);
+   if (!obj)
+     {
+        ERR("Could not get dbus object");
+        goto obj_err;
+     }
+
+   proxy = eldbus_proxy_get(obj, "org.freedesktop.login1.Seat");
+   if (!proxy)
+     {
+        ERR("Could not get dbus proxy");
+        goto proxy_err;
+     }
+
+   msg = eldbus_proxy_method_call_new(proxy, "SwitchTo");
+   if (!msg)
+     {
+        ERR("Could not create method call for proxy");
+        goto msg_err;
+     }
+
+   eldbus_message_arguments_append(msg, "u", &vt);
+
+   eldbus_proxy_send(proxy, msg, NULL, NULL, -1);
+
+   eldbus_message_unref(msg);
+   eldbus_proxy_unref(proxy);
+   eldbus_object_unref(obj);
+
+   return EINA_TRUE;
+
+msg_err:
+   eldbus_proxy_unref(proxy);
+proxy_err:
+   eldbus_object_unref(obj);
+obj_err:
+   return EINA_FALSE;
+}
+
 Elput_Interface _logind_interface =
 {
    _logind_connect,
    _logind_disconnect,
    _logind_open,
    _logind_close,
+   _logind_vt_set,
 };
 
 #endif

src/lib/elput/elput_manager.c

@@ -62,3 +62,16 @@ elput_manager_close(Elput_Manager *manager, int fd)
    if (manager->interface->close)
      manager->interface->close(manager, fd);
 }
+
+EAPI Eina_Bool
+elput_manager_vt_set(Elput_Manager *manager, int vt)
+{
+   EINA_SAFETY_ON_NULL_RETURN_VAL(manager, EINA_FALSE);
+   EINA_SAFETY_ON_NULL_RETURN_VAL(manager->interface, EINA_FALSE);
+   EINA_SAFETY_ON_TRUE_RETURN_VAL((vt < 0), EINA_FALSE);
+
+   if (manager->interface->vt_set)
+     return manager->interface->vt_set(manager, vt);
+
+   return EINA_FALSE;
+}

src/lib/elput/elput_private.h

@@ -72,6 +72,7 @@ typedef struct _Elput_Interface
    void (*disconnect)(Elput_Manager *manager);
    int (*open)(Elput_Manager *manager, const char *path, int flags);
    void (*close)(Elput_Manager *manager, int fd);
+   Eina_Bool (*vt_set)(Elput_Manager *manager, int vt);
 } Elput_Interface;
 
 typedef struct _Elput_Input