Dear Rasmus, In message <[email protected]> you wrote: > > > This is not a good idea. The decision whether a variable shall be > > stored permanently or not, or wheter it is readonly or writable, and > > other such properties should never based on their name. > > Sorry, but what other property of the variable could possibly determine > those things, then?
Such properties are stored in the .flags settings, see env/flags.c > There may > > be many good reasons that some .name variable _shall_ be persistent. > > Sure, absolutely. Which is why this is entirely opt-in for those who > know they won't need that, but do have some semi-complicated script that > interacts with various commands that return their output via an > environment variable. This has been discussed several times before (for example in the context of UEFI persistance handling); it should be implemented using the existing .flags mechanism. > Ah, now I see how env_flags_varaccess is actually implemented, > involving a .flags special variable. OK, then I can certainly see why > one would not want that to be excluded from the environment - I just > thought the idea behind "printenv" hiding dot-variables by default was > that those were considered temporary, and not special in this way. Not only that, .flags is exactly the mechanism that should be used to implement what you want. > So, would you accept introducing env_flags_varaccess_temporary, for > which I could then add tmp_.*:st ? Please look up the last discussion of this topic; see the thread "efi_loader: implementing non-volatile UEFI variables" starting here: https://lists.denx.de/pipermail/u-boot/2019-June/373503.html Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: [email protected] Anyone who knows history, particularly the history of Europe, will, I think, recognize that the domination of education or of government by any one particular religious faith is never a happy arrangement for the people. - Eleanor Roosevelt
