src/dispatcher: do not monitor dispatcher scripts

The monitors have been in place since the dispatcher has been introduced.
They need the daemon to do extra work know where the files are supposed to
be. It seems to me the complexity is not worth it.

Let's remove them now, making it easier to modify the dispatcher to look
for scripts in other places.

src/nm-dispatcher.c

@@ -15,7 +15,7 @@
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
- * Copyright (C) 2004 - 2017 Red Hat, Inc.
+ * Copyright (C) 2004 - 2018 Red Hat, Inc.
  * Copyright (C) 2005 - 2008 Novell, Inc.
  */
 
@@ -47,42 +47,6 @@
 static GDBusProxy *dispatcher_proxy;
 static GHashTable *requests = NULL;
 
-typedef struct {
-	GFileMonitor *monitor;
-	const char *const description;
-	const char *const dir;
-	const guint16 dir_len;
-	char has_scripts;
-} Monitor;
-
-enum {
-	MONITOR_INDEX_DEFAULT,
-	MONITOR_INDEX_PRE_UP,
-	MONITOR_INDEX_PRE_DOWN,
-};
-
-static Monitor monitors[3] = {
-#define MONITORS_INIT_SET(INDEX, USE, SCRIPT_DIR)   [INDEX] = { .dir_len = NM_STRLEN (SCRIPT_DIR), .dir = SCRIPT_DIR, .description = ("" USE), .has_scripts = TRUE }
-	MONITORS_INIT_SET (MONITOR_INDEX_DEFAULT,  "default",  NMD_SCRIPT_DIR_DEFAULT),
-	MONITORS_INIT_SET (MONITOR_INDEX_PRE_UP,   "pre-up",   NMD_SCRIPT_DIR_PRE_UP),
-	MONITORS_INIT_SET (MONITOR_INDEX_PRE_DOWN, "pre-down", NMD_SCRIPT_DIR_PRE_DOWN),
-};
-
-static const Monitor*
-_get_monitor_by_action (NMDispatcherAction action)
-{
-	switch (action) {
-	case NM_DISPATCHER_ACTION_PRE_UP:
-	case NM_DISPATCHER_ACTION_VPN_PRE_UP:
-		return &monitors[MONITOR_INDEX_PRE_UP];
-	case NM_DISPATCHER_ACTION_PRE_DOWN:
-	case NM_DISPATCHER_ACTION_VPN_PRE_DOWN:
-		return &monitors[MONITOR_INDEX_PRE_DOWN];
-	default:
-		return &monitors[MONITOR_INDEX_DEFAULT];
-	}
-}
-
 static void
 dump_proxy_to_props (NMProxyConfig *proxy, GVariantBuilder *builder)
 {
@@ -379,7 +343,6 @@ dispatcher_results_process (guint request_id, NMDispatcherAction action, GVarian
 {
 	const char *script, *err;
 	guint32 result;
-	const Monitor *monitor = _get_monitor_by_action (action);
 
 	g_return_if_fail (results != NULL);
 
@@ -389,31 +352,14 @@ dispatcher_results_process (guint request_id, NMDispatcherAction action, GVarian
 	}
 
 	while (g_variant_iter_next (results, "(&su&s)", &script, &result, &err)) {
-		const char *script_validation_msg = "";
-
-		if (!*script) {
-			script_validation_msg = " (path is NULL)";
-			script = "(unknown)";
-		} else if (!strncmp (script, monitor->dir, monitor->dir_len)            /* check: prefixed by script directory */
-		    && script[monitor->dir_len] == '/' && script[monitor->dir_len+1]    /* check: with additional "/?" */
-		    && !strchr (&script[monitor->dir_len+1], '/')) {                    /* check: and no further '/' */
-			/* we expect the script to lie inside monitor->dir. If it does,
-			 * strip the directory name. Otherwise show the full path and a warning. */
-			script += monitor->dir_len + 1;
-		} else
-			script_validation_msg = " (unexpected path)";
-
 		if (result == DISPATCH_RESULT_SUCCESS) {
-			_LOGD ("(%u) %s succeeded%s",
+			_LOGD ("(%u) %s succeeded", request_id, script);
-			       request_id,
-			       script, script_validation_msg);
 		} else {
-			_LOGW ("(%u) %s failed (%s): %s%s",
+			_LOGW ("(%u) %s failed (%s): %s",
 			       request_id,
 			       script,
 			       dispatch_result_to_string (result),
-			       err,
+			       err);
-			       script_validation_msg);
 		}
 	}
 }
@@ -474,18 +420,6 @@ action_to_string (NMDispatcherAction action)
 	return action_table[action];
 }
 
-static gboolean
-dispatcher_idle_cb (gpointer user_data)
-{
-	DispatchInfo *info = user_data;
-
-	info->idle_id = 0;
-	if (info->callback)
-		info->callback (info->request_id, info->user_data);
-	dispatcher_info_cleanup (info);
-	return G_SOURCE_REMOVE;
-}
-
 static gboolean
 _dispatcher_call (NMDispatcherAction action,
                   gboolean blocking,
@@ -551,21 +485,6 @@ _dispatcher_call (NMDispatcherAction action,
 		           : (callback ? " (with callback)" : ""));
 	}
 
-	if (!_get_monitor_by_action(action)->has_scripts) {
-		if (blocking == FALSE && (out_call_id || callback)) {
-			info = g_malloc0 (sizeof (*info));
-			info->action = action;
-			info->request_id = reqid;
-			info->callback = callback;
-			info->user_data = user_data;
-			info->idle_id = g_idle_add (dispatcher_idle_cb, info);
-			_LOGD ("(%u) simulate request; no scripts in %s",  reqid, _get_monitor_by_action(action)->dir);
-		} else
-			_LOGD ("(%u) ignoring request; no scripts in %s", reqid, _get_monitor_by_action(action)->dir);
-		success = TRUE;
-		goto done;
-	}
-
 	if (applied_connection)
 		connection_dict = nm_connection_to_dbus (applied_connection, NM_CONNECTION_SERIALIZE_NO_SECRETS);
 	else
@@ -698,7 +617,6 @@ _dispatcher_call (NMDispatcherAction action,
 	g_variant_unref (device_dhcp4_props);
 	g_variant_unref (device_dhcp6_props);
 
-done:
 	if (success && info) {
 		/* Track the request in case of cancelation */
 		g_hash_table_insert (requests, GUINT_TO_POINTER (info->request_id), info);
@@ -931,70 +849,11 @@ nm_dispatcher_call_cancel (guint call_id)
 	}
 }
 
-static void
-dispatcher_dir_changed (GFileMonitor *monitor,
-                        GFile *file,
-                        GFile *other_file,
-                        GFileMonitorEvent event_type,
-                        Monitor *item)
-{
-	const char *name;
-	char *full_name;
-	GDir *dir;
-	GError *error = NULL;
-
-	dir = g_dir_open (item->dir, 0, &error);
-	if (dir) {
-		int errsv = 0;
-
-		item->has_scripts = FALSE;
-		errno = 0;
-		while (!item->has_scripts
-		    && (name = g_dir_read_name (dir))) {
-			full_name = g_build_filename (item->dir, name, NULL);
-			item->has_scripts = g_file_test (full_name, G_FILE_TEST_IS_EXECUTABLE);
-			g_free (full_name);
-		}
-		errsv = errno;
-		g_dir_close (dir);
-		if (item->has_scripts)
-			_LOGD ("%s script directory '%s' has scripts", item->description, item->dir);
-		else if (errsv == 0)
-			_LOGD ("%s script directory '%s' has no scripts", item->description, item->dir);
-		else {
-			_LOGD ("%s script directory '%s' error reading (%s)", item->description, item->dir, nm_strerror_native (errsv));
-			item->has_scripts = TRUE;
-		}
-	} else {
-		if (g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT)) {
-			_LOGD ("%s script directory '%s' does not exist", item->description, item->dir);
-			item->has_scripts = FALSE;
-		} else {
-			_LOGD ("%s script directory '%s' error (%s)", item->description, item->dir, error->message);
-			item->has_scripts = TRUE;
-		}
-		g_error_free (error);
-	}
-
-}
-
 void
 nm_dispatcher_init (void)
 {
-	GFile *file;
-	guint i;
 	GError *error = NULL;
 
-	for (i = 0; i < G_N_ELEMENTS (monitors); i++) {
-		file = g_file_new_for_path (monitors[i].dir);
-		monitors[i].monitor = g_file_monitor_directory (file, G_FILE_MONITOR_NONE, NULL, NULL);
-		if (monitors[i].monitor) {
-			g_signal_connect (monitors[i].monitor, "changed", G_CALLBACK (dispatcher_dir_changed), &monitors[i]);
-			dispatcher_dir_changed (monitors[i].monitor, file, NULL, 0, &monitors[i]);
-		}
-		g_object_unref (file);
-	}
-
 	dispatcher_proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
 	                                                  G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES |
 	                                                      G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS,