[libvirt] PATCH: Fix DBus thread safety

[Daniel P. Berrange]

We are using DBus from multiple threads in libvirtd. We are not calling
dbus_threads_init_default().  Very bad things result. Happy-crashy-daemon

This patch fixes that, and also stops DBus messing around with SIGPIPE and
also stops it calling exit() when the bus disconnects, so we can actually
see the error & continue with life.

Daniel

diff -rup libvirt-0.6.0.orig/qemud/qemud.c libvirt-0.6.0.new/qemud/qemud.c
--- libvirt-0.6.0.orig/qemud/qemud.c	2009-02-18 10:56:34.000000000 +0000
+++ libvirt-0.6.0.new/qemud/qemud.c	2009-02-18 12:52:18.000000000 +0000
@@ -860,6 +860,10 @@ static struct qemud_server *qemudNetwork
     if (auth_unix_rw == REMOTE_AUTH_POLKIT ||
         auth_unix_ro == REMOTE_AUTH_POLKIT) {
         DBusError derr;
+
+        dbus_connection_set_change_sigpipe(FALSE);
+        dbus_threads_init_default();
+
         dbus_error_init(&derr);
         server->sysbus = dbus_bus_get(DBUS_BUS_SYSTEM, &derr);
         if (!(server->sysbus)) {
@@ -868,6 +872,7 @@ static struct qemud_server *qemudNetwork
             dbus_error_free(&derr);
             goto cleanup;
         }
+        dbus_connection_set_exit_on_disconnect(server->sysbus, FALSE);
     }
 #endif
 
diff -rup libvirt-0.6.0.orig/src/node_device_hal.c libvirt-0.6.0.new/src/node_device_hal.c
--- libvirt-0.6.0.orig/src/node_device_hal.c	2009-01-16 12:44:22.000000000 +0000
+++ libvirt-0.6.0.new/src/node_device_hal.c	2009-02-18 12:52:48.000000000 +0000
@@ -685,6 +685,9 @@ static int halDeviceMonitorStartup(void)
     nodeDeviceLock(driverState);
 
     /* Allocate and initialize a new HAL context */
+    dbus_connection_set_change_sigpipe(FALSE);
+    dbus_threads_init_default();
+
     dbus_error_init(&err);
     hal_ctx = libhal_ctx_new();
     if (hal_ctx == NULL) {
@@ -696,6 +699,8 @@ static int halDeviceMonitorStartup(void)
         fprintf(stderr, "%s: dbus_bus_get failed\n", __FUNCTION__);
         goto failure;
     }
+    dbus_connection_set_exit_on_disconnect(dbus_conn, FALSE);
+
     if (!libhal_ctx_set_dbus_connection(hal_ctx, dbus_conn)) {
         fprintf(stderr, "%s: libhal_ctx_set_dbus_connection failed\n",
                 __FUNCTION__);


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