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f0b236 |
From bf409dbab5f5910de6c2691f978bb8644532728a Mon Sep 17 00:00:00 2001
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f0b236 |
From: Rob Crittenden <rcritten@redhat.com>
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f0b236 |
Date: Mon, 18 May 2020 15:01:02 -0400
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f0b236 |
Subject: [PATCH] Adapt to the new behavior of disconnect in dbus-broker
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f0b236 |
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f0b236 |
The dbus server was replaced in Fedora-29 to use dbus-broker.
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f0b236 |
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f0b236 |
This server does not allow reconnects on a disconnect. certmonger
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f0b236 |
was crashing as a result.
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f0b236 |
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f0b236 |
The only way to directly pass a message between the dbus queue and
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f0b236 |
the main tevent handle is via a signal. So when a disconnect is
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f0b236 |
detected send a SIGTERM to getpid() in order to force a graceful
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f0b236 |
shutdown.
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f0b236 |
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f0b236 |
https://bugzilla.redhat.com/show_bug.cgi?id=1687698
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f0b236 |
---
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f0b236 |
src/tdbus.c | 61 ++++++++++-------------------------------------------
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f0b236 |
1 file changed, 11 insertions(+), 50 deletions(-)
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f0b236 |
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f0b236 |
diff --git a/src/tdbus.c b/src/tdbus.c
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f0b236 |
index a81b534..402022e 100644
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f0b236 |
--- a/src/tdbus.c
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f0b236 |
+++ b/src/tdbus.c
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f0b236 |
@@ -22,6 +22,7 @@
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f0b236 |
#include <stdlib.h>
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f0b236 |
#include <string.h>
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f0b236 |
#include <unistd.h>
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f0b236 |
+#include <signal.h>
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f0b236 |
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f0b236 |
#include <talloc.h>
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f0b236 |
#include <tevent.h>
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f0b236 |
@@ -522,60 +523,24 @@ cm_tdbus_timeout_cleanup(void *data)
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f0b236 |
}
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f0b236 |
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f0b236 |
static void
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f0b236 |
-cm_tdbus_reconnect(struct tevent_context *ec, struct tevent_timer *timer,
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f0b236 |
+cm_tdbus_disconnected(struct tevent_context *ec, struct tevent_timer *timer,
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f0b236 |
struct timeval current_time, void *pvt)
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f0b236 |
{
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f0b236 |
- const char *bus_desc;
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f0b236 |
struct tdbus_connection *tdb;
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f0b236 |
- struct timeval later;
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f0b236 |
- dbus_bool_t exit_on_disconnect = TRUE;
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f0b236 |
+ pid_t pid;
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f0b236 |
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f0b236 |
tdb = pvt;
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f0b236 |
talloc_free(timer);
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f0b236 |
if ((tdb->conn == NULL) ||
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f0b236 |
!dbus_connection_get_is_connected(tdb->conn)) {
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f0b236 |
- /* Close the current connection and open a new one. */
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f0b236 |
+ /* Close the current connection and exit. */
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f0b236 |
if (tdb->conn != NULL) {
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f0b236 |
dbus_connection_unref(tdb->conn);
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f0b236 |
tdb->conn = NULL;
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f0b236 |
}
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f0b236 |
- bus_desc = NULL;
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f0b236 |
- switch (tdb->conn_type) {
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f0b236 |
- case cm_tdbus_system:
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f0b236 |
- cm_log(1, "Attempting to reconnect to system bus.\n");
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f0b236 |
- tdb->conn = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
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f0b236 |
- cm_set_conn_ptr(tdb->data, tdb->conn);
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f0b236 |
- /* Don't exit if we get disconnected. */
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f0b236 |
- exit_on_disconnect = FALSE;
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f0b236 |
- bus_desc = "system";
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f0b236 |
- break;
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f0b236 |
- case cm_tdbus_session:
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f0b236 |
- cm_log(1, "Attempting to reconnect to session bus.\n");
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f0b236 |
- tdb->conn = dbus_bus_get(DBUS_BUS_SESSION, NULL);
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f0b236 |
- cm_set_conn_ptr(tdb->data, tdb->conn);
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f0b236 |
- /* Exit if we get disconnected. */
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f0b236 |
- exit_on_disconnect = TRUE;
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f0b236 |
- bus_desc = "session";
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f0b236 |
- break;
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f0b236 |
- case cm_tdbus_private:
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f0b236 |
- abort();
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f0b236 |
- break;
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f0b236 |
- }
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f0b236 |
- if ((tdb->conn != NULL) &&
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f0b236 |
- dbus_connection_get_is_connected(tdb->conn)) {
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f0b236 |
- /* We're reconnected; reset our handlers. */
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f0b236 |
- cm_log(1, "Reconnected to %s bus.\n", bus_desc);
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f0b236 |
- dbus_connection_set_exit_on_disconnect(tdb->conn,
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f0b236 |
- exit_on_disconnect);
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f0b236 |
- cm_tdbus_setup_public_connection(tdb, tdb->conn,
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f0b236 |
- bus_desc, NULL);
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f0b236 |
- } else {
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f0b236 |
- /* Try reconnecting again later. */
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f0b236 |
- later = tevent_timeval_current_ofs(CM_DBUS_RECONNECT_TIMEOUT, 0),
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f0b236 |
- tevent_add_timer(ec, tdb, later,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- cm_tdbus_reconnect,
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f0b236 |
- tdb);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- }
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
+ pid = getpid();
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
+ cm_log(0, "Disconnected from dbus, exiting with SIGTERM.\n");
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
+ kill(pid, SIGTERM);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
}
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
}
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
@@ -585,12 +550,12 @@ cm_tdbus_filter(DBusConnection *conn, DBusMessage *dmessage, void *data)
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
struct tdbus_connection *tdb = data;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
const char *destination, *unique_name, *path, *interface, *member;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- /* If we're disconnected, queue a reconnect. */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
+ /* If we're disconnected, queue an exit. */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
if ((tdb->conn_type != cm_tdbus_private) &&
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
!dbus_connection_get_is_connected(conn)) {
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
tevent_add_timer(talloc_parent(tdb), tdb,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
tevent_timeval_current(),
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- cm_tdbus_reconnect,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
+ cm_tdbus_disconnected,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
tdb);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
}
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
@@ -745,7 +710,6 @@ cm_tdbus_setup_public(struct tevent_context *ec, enum cm_tdbus_type bus_type,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
DBusError err;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
const char *bus_desc;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
struct tdbus_connection *tdb;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- dbus_bool_t exit_on_disconnect;
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
/* Build our own context. */
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
tdb = talloc_ptrtype(ec, tdb);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
@@ -764,15 +728,11 @@ cm_tdbus_setup_public(struct tevent_context *ec, enum cm_tdbus_type bus_type,
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
case cm_tdbus_system:
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
conn = dbus_bus_get(DBUS_BUS_SYSTEM, error);
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![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
cm_set_conn_ptr(data, conn);
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- /* Don't exit if we get disconnected. */
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|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- exit_on_disconnect = FALSE;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
bus_desc = "system";
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|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
break;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
case cm_tdbus_session:
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|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
conn = dbus_bus_get(DBUS_BUS_SESSION, error);
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|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
cm_set_conn_ptr(data, conn);
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|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- /* Exit if we get disconnected. */
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|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- exit_on_disconnect = TRUE;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
bus_desc = "session";
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
break;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
case cm_tdbus_private:
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
@@ -784,7 +744,8 @@ cm_tdbus_setup_public(struct tevent_context *ec, enum cm_tdbus_type bus_type,
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|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
talloc_free(tdb);
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
return -1;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
}
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
- dbus_connection_set_exit_on_disconnect(conn, exit_on_disconnect);
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
+ /* Exit on disconnect is handled in cm_tdbus_disconnected(). */
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
+ dbus_connection_set_exit_on_disconnect(conn, FALSE);
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
tdb->conn = conn;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
tdb->conn_type = bus_type;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
tdb->data = data;
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
--
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
2.21.1
|
|
![](https://seccdn.libravatar.org/avatar/eca4d0658e293ac828929c05684948cb411ba891fa2ad2130aafa91b664e89ad?s=16&d=retro) |
f0b236 |
|