Using systemd tmpfiles

As part of my regular duties at my day job, I provide some community support on the HTCondor users’ mailing list. At the beginning of the week, someone came to the list with Fedora RPM troubles. I was able to track it down to the fact that the RPM didn’t correctly create some temporary directories.

But why not? It’s been a while since I did any RPM building, but at first glance, the spec file looked fine. The systemd tmpfiles configuration looked good, too. Then someone else found the cause of the problem: according to the Fedora packaging guidelines, a package should write the config file andcreate the directory. It turns out that tmpfiles.d is only processed at boot time (or when manually invoked), so a package that needs a file/directory to exist needs to create it at install time (or require a restart).

I was going to file an RFE, but I found a related one marked as CLOSED->WONTFIX. I understand the reasoning here, so I won’t reopen it to argue. It’s just a surprising behavior if it’s not something you regularly deal with.

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