Over in Arch Linux, I am trying to move some packages over from using post-install scripts to using tpmfiles.d/sysusers.d for any applicable behavior. Occasionally, default files need to be created with the contents of some specifier, for example %H.
I don't think /usr/share/factory is appropriate for this, but it shouldn't be overwritten with "F" type either. So "f" seems most appropriate. But re-running systemd-tmpfiles repeatedly appends the argument to the file, which doesn't seem right. I cannot offhand think of a situation where I would want that utility, anyways. The manpage unclear on the intended behavior, so I'm not even sure if this is a bug. "Create a file if it does not exist yet. If the argument parameter is given, it will be written to the file." I wouldn't describe the current behavior as "written", but rather "appended". And there appears to be no way to do what I want. OTOH, it also updates the file owner/mode for existing files, which seems to be in theme for this appending behavior, but which is also undocumented behavior. Contrast this with the "d" type, which explicitly states "The mode and ownership will be adjusted if specified and the directory already exists." So either the behavior or the documentation seems to be flawed here. I guess since "f" consistently behaves like "F" except without the initial truncation, it is probably the documentation that is flawed, in which case I think "write" should be replaced with "append", or the description for "F" should thematically match "D" by stating "Similar to f, but in addition if the file exists it will be truncated before checking for and writing any argument parameter". Also, how do I use a specifier in an argument here? Should I use "F" mode to write a file to /usr/share/factory and then on the next line use "C" to copy it over? That's not very simple IMHO. -- Eli Schwartz Bug Wrangler and Trusted User
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