[systemd-devel] systemd service not connecting to session dbus

[Jérémy Rosen]

There are two types of systemd instances
* system instance (PID1) which controls the machine as a whole
* user instances that are started when the user logs in.

You seem to have a system service (started by the system session). A 
system service can't (easily) access the user bus.
The session bus is started by the user instance when the user login. If 
the user hasn't logged in yet, the bus isn't started.
Moreover, the user bus is found via an environment variable, which is 
not set for system services (even when User= is used)

What are you trying to do exactly ? should your service be a session 
service ?

Regards
Jeremy


On 13/08/2018 09:17, Deepan Muthusamy wrote:
> I have an application which has to communicate with session dbus. If I start my application binary manually or start using Init.d, it is connecting to session d-bus.
>
> But if I start my application through systemd, it is failing to start.  I tried to start using systemctl start my-service-name, this time also it is failing.
>
>
> And also I go through the answer given by keithel in https://serverfault.com/questions/892465/starting-systemd-services-sharing-a-session-d-bus-on-headless-system .
>
> Still Iam facing the same error.
>
>
> The .service fail is as follows:
>
>
> [Unit]
> Requires= dbus.socket
> After= dbus.socket
>
> [Service]
> Type=dbus
> BusName=org.client
> ExecStart=/usr/local/bin/myExe
> TimeoutSec=300
> WatchdogSec=20
>
> [Install]
> WantedBy=basic.target
>
>
> Operating system:
> Ubuntu 16.04 (64-bit)
>
>
>
>
>
>
>
>
>
> DEEPAN MUTHUSAMY,
> TATA CONSULTANCY SERVICE,
> mobile no: +91 8012309210
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