aTrain snap building - problems (mainly multiprocessing)

[ogra]

Does this help ?

Python multiprocessing sem_open blocked in strict mode

I’m trying to snap an app that uses Python’s multiprocessing module but it’s getting blocked by AppArmour when accessing /dev/shm/<randomName>. I traced the problem to the SemLock implementation in multiprocessing, specifically sem_open call, and changed the name format so that it creates a semaphore at /dev/shm/sem.snap.<snapName>.<randomName> since that path is allowed in the AppArmour profile. But that didn’t work. I then ran strace on the app and saw that sem_open() first issues an open() a…