FtimeGranularity is the filesystem timestamp granularity for this system.

IsTestBinary returns whether the current binary is a test binary.

MakeReadOnly makes the given path read-only (by bind-mounting it as "ro").

MakeReadWrite undos the effect of MakeReadOnly.

RandomString returns a pseudorandom alphabetical (mixed-case) string.

Unix returns the local Time corresponding to the given Unix time, rounded to the timestamp granularity for this system.