I have a django application which connects to several serial devices on the server.
This application is running on Ubuntu 10.04. The user "chero" is the owner of the webserver processes. chero is a member of the dialout group.
Everything works as expected using the development server, or a python shell (running as user chero).
The webserver is cherokee, with uwsgi (also running as chero). When the webserver tries to open a serial port I get: [error 13] permission denied.
I have verified that the webserver is indeed running as user chero by inserting this in the line before the serial port would be opened: raise ValueError('user: ' + pwd.getpwuid( os.getuid() ).pw_name)
The webserver was able to open the port after I set permissions on /dev/ttyS* to 666, but that is not an ideal solution.
Is there some reason uwsgi or cherokee would prevent chero from being recognized as a member of the dialout group?