daemon: Remove Manager.Run() dbus method

Use the $cockpit.spawn() channel instead to run commands.

Closes #474
Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>

data/com.redhat.Cockpit.xml

@@ -162,17 +162,6 @@
       <arg name="tz_offset_seconds" type="d" direction="out"/>
     </signal>
 
-    <!--
-        Run:
-
-        Execute a arbitrary shell command as root and return its
-        output.
-    -->
-    <method name="Run">
-      <arg name="command" type="s" direction="in"/>
-      <arg name="output" type="s" direction="out"/>
-    </method>
-
     <!--
         GetAvatarDataURL:
 

src/daemon/manager.c

@@ -828,22 +828,6 @@ handle_cancel_shutdown (CockpitManager *object,
 
 /* ---------------------------------------------------------------------------------------------------- */
 
-static gboolean
-handle_run (CockpitManager *object,
-            GDBusMethodInvocation *invocation,
-            const char *arg_command)
-{
-  if (!auth_check_sender_role (invocation, COCKPIT_ROLE_ADMIN))
-    return TRUE;
-
-  gs_free char *output = NULL;
-  if (run_cmd_for_invocation (invocation, &output, "/bin/sh", "-c", arg_command, NULL))
-    cockpit_manager_complete_run (object, invocation, output);
-  return TRUE;
-}
-
-/* ---------------------------------------------------------------------------------------------------- */
-
 static void
 manager_iface_init (CockpitManagerIface *iface)
 {
@@ -854,6 +838,4 @@ manager_iface_init (CockpitManagerIface *iface)
   iface->handle_get_server_time = handle_get_server_time;
   iface->handle_shutdown = handle_shutdown;
   iface->handle_cancel_shutdown = handle_cancel_shutdown;
-
-  iface->handle_run = handle_run;
 }

src/web/cockpit-docker.js

@@ -1387,10 +1387,13 @@ function DockerClient(machine) {
          * TODO: We need a sane UI for showing that the resources can't be changed
          * Showing unexpected error isn't it.
          */
-        manager.call('Run', command, function (error, output) {
-            if (error)
-                console.warn(error);
-        });
+        var options = {
+            host: cockpit_get_page_param ("machine", "server")
+        };
+        $cockpit.spawn(["/bin/sh", "-c", command], options).
+            fail(function(ex) {
+                console.warn(ex);
+            });
     }
 
     this.change_memory_limit = function change_memory_limit(id, value) {