d6b008b01e
There's finally quota on tmpfs, hence let's use it to make it harder for users to DoS the system by consuming all disk space in /tmp/ and /dev/shm/. This enforces a default limit of 80% quota of the backing fs for these two dirs for users, but this can be overriden in the user record, if desired. This also adds two other interesting features: 1. mount units gain GracefulOptions= which takes optional mount options that are added only if supported by the kernel. (this is used to enable usrquota on /tmp/, if available.) 2. The PAM logic in service management now supports reading passwords from service credentials and via the askpw logic. This used for make testing easy (so that we can run0 into a homed user which strictly requires a password).
System and Service Manager
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