dbus: Terminate cleanly on messagebus shutdown
By default, dbus_connection_dispatch() will call _exit() if the bus connection has been closed. This caused wpa_supplicant to terminate without properly cleaning up after itself. To ensure that we terminate cleanly when the messagebus terminates, override the exit_on_disconnect behavior and install a filter to handle libdbus's "Disconnected" signal. [Bug 474] Signed-hostap: Daniel Gnoutcheff <daniel@gnoutcheff.name>
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1 changed files with 24 additions and 1 deletions
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@ -17,6 +17,7 @@
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#include "dbus_common_i.h"
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#include "dbus_common_i.h"
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#include "dbus_new.h"
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#include "dbus_new.h"
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#include "dbus_old.h"
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#include "dbus_old.h"
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#include "../wpa_supplicant_i.h"
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#ifndef SIGPOLL
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#ifndef SIGPOLL
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@ -257,6 +258,22 @@ static int integrate_with_eloop(struct wpas_dbus_priv *priv)
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}
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}
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static DBusHandlerResult disconnect_filter(DBusConnection *conn,
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DBusMessage *message, void *data)
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{
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struct wpas_dbus_priv *priv = data;
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if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL,
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"Disconnected")) {
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wpa_printf(MSG_DEBUG, "dbus: bus disconnected, terminating");
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dbus_connection_set_exit_on_disconnect(conn, FALSE);
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wpa_supplicant_terminate_proc(priv->global);
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return DBUS_HANDLER_RESULT_HANDLED;
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} else
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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static int wpas_dbus_init_common(struct wpas_dbus_priv *priv)
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static int wpas_dbus_init_common(struct wpas_dbus_priv *priv)
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{
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{
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DBusError error;
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DBusError error;
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@ -265,7 +282,10 @@ static int wpas_dbus_init_common(struct wpas_dbus_priv *priv)
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/* Get a reference to the system bus */
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/* Get a reference to the system bus */
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dbus_error_init(&error);
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dbus_error_init(&error);
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priv->con = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
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priv->con = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
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if (!priv->con) {
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if (priv->con) {
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dbus_connection_add_filter(priv->con, disconnect_filter, priv,
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NULL);
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} else {
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wpa_printf(MSG_ERROR, "dbus: Could not acquire the system "
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wpa_printf(MSG_ERROR, "dbus: Could not acquire the system "
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"bus: %s - %s", error.name, error.message);
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"bus: %s - %s", error.name, error.message);
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ret = -1;
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ret = -1;
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@ -304,6 +324,9 @@ static void wpas_dbus_deinit_common(struct wpas_dbus_priv *priv)
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NULL, NULL, NULL);
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NULL, NULL, NULL);
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dbus_connection_set_timeout_functions(priv->con, NULL, NULL,
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dbus_connection_set_timeout_functions(priv->con, NULL, NULL,
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NULL, NULL, NULL);
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NULL, NULL, NULL);
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dbus_connection_remove_filter(priv->con, disconnect_filter,
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priv);
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dbus_connection_unref(priv->con);
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dbus_connection_unref(priv->con);
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}
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}
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