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I'm trying to auto-start a DBus service when my client program starts. I've setup a .service file, but it's not working.

My service name is

org.fandingo.PMP

I register the name with a python server with 

 name = dbus.service.BusName('org.fandingo.PMP', session_bus)
 object = PMPService(session_bus, '/PMPService', PMPProxy())

I can connect to this fine if I manually run the server code with the following from the client

remote = bus.get_object('org.fandingo.PMP', '/PMPService')

So the server and client both work if invoked manually. If I just try the client, I get the following Python exception

dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name org.fandingo.PMP was not provided by any .service files

Here is my .service file 

-rw-r--r--. root root unconfined_u:object_r:usr_t:s0   /usr/share/dbus-1/services/org.fandingo.PMP.service

These permissions and SELinux labels are identical to the other .service files.

The .service file contents

[D-Bus Service]
Name=org.fandingo.PMP
Exec=/home/fandingo/code/python/pmp/src/pmpserver.py
User=fandingo

pmpserver.py is executable and has the correct shebang.

Does anyone see any problems with me configuration?

Thanks,

fandingo
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1 Answers1

2

Finally figured this one out.

I'm not sure exactly how .service files are executed, but they don't get /bin/env set properly.

My shebang was not working properly:

#!/bin/env python

I changed my service file to

[D-Bus Service]
Name=org.fandingo.PMP
Exec=python /home/fandingo/code/python/pmp/src/pmpserver.py

Everything works great now.

ederag
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fandingo
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    The more usual location for env is in /usr/bin. At least on Linux it's there. – Uwe Kleine-König Mar 27 '14 at 09:37
  • To editors: please resist the temptation to fix the original shebang. That would make the comment and the reason why the activation initially failed more obscure. – ederag Jun 06 '23 at 21:09