[libvirt] [PATCH 3/3] rpc: make virNetDaemonCallInhibit a no-op with no logind

[Ján Tomko]

As a side effect, this also silences the possible:
  internal error: Unable to get DBus system bus connection:
  Failed to connect to socket /run/dbus/system_bus_socket:
  No such file or directory
error, since we check upfront whether dbus is available.

Signed-off-by: Ján Tomko <jtomko at redhat.com>
---
 src/libvirt_private.syms | 1 +
 src/rpc/virnetdaemon.c   | 3 +++
 src/util/virsystemd.c    | 2 +-
 src/util/virsystemd.h    | 2 ++
 4 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 5940342087..ff4ddd1c5c 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -3135,6 +3135,7 @@ virSystemdCanSuspend;
 virSystemdCreateMachine;
 virSystemdGetActivation;
 virSystemdGetMachineNameByPID;
+virSystemdHasLogind;
 virSystemdHasLogindResetCachedValue;
 virSystemdHasMachinedResetCachedValue;
 virSystemdMakeScopeName;
diff --git a/src/rpc/virnetdaemon.c b/src/rpc/virnetdaemon.c
index d098cf4ae9..7b68ddbdf2 100644
--- a/src/rpc/virnetdaemon.c
+++ b/src/rpc/virnetdaemon.c
@@ -508,6 +508,9 @@ virNetDaemonCallInhibit(virNetDaemonPtr dmn,
     VIR_DEBUG("dmn=%p what=%s who=%s why=%s mode=%s",
               dmn, NULLSTR(what), NULLSTR(who), NULLSTR(why), NULLSTR(mode));
 
+    if (virSystemdHasLogind() < 0)
+        return;
+
     if (!(systemBus = virDBusGetSystemBus()))
         return;
 
diff --git a/src/util/virsystemd.c b/src/util/virsystemd.c
index 66d0b7bd53..e75c5b835a 100644
--- a/src/util/virsystemd.c
+++ b/src/util/virsystemd.c
@@ -181,7 +181,7 @@ virSystemdHasMachined(void)
     return ret;
 }
 
-static int
+int
 virSystemdHasLogind(void)
 {
     int ret;
diff --git a/src/util/virsystemd.h b/src/util/virsystemd.h
index 96626f8fff..5f1a4413fe 100644
--- a/src/util/virsystemd.h
+++ b/src/util/virsystemd.h
@@ -57,6 +57,8 @@ int virSystemdTerminateMachine(const char *name);
 
 void virSystemdNotifyStartup(void);
 
+int virSystemdHasLogind(void);
+
 int virSystemdCanSuspend(bool *result);
 
 int virSystemdCanHibernate(bool *result);
-- 
2.19.2