Reframe fails to perform actions when no configuration is passed

[teojgo]

The error thrown is:
failed to load configuration: [Errno 6] No such device or address

It is easy to reproduce with a docker container using the following Dockerfile:

FROM python

RUN git clone https://github.com/eth-cscs/reframe.git && \
    cd reframe && pip install -r requirements.txt

ENTRYPOINT ["/reframe/bin/reframe"]

CMD ["-l"]

To build the above run docker build --tag=reframe .

And to run: docker run reframe

[teojgo]

After some investigation, the problem comes from the os.getlogin() called in:
https://github.com/eth-cscs/reframe/blob/6fb8596f89fb5addbf79787389311a632d406ea3/reframe/core/config.py#L554

After some searching, the os.getlogin() can be replaced with pwd.getpwuid(os.getuid()).pw_name which works.