this post was submitted on 13 May 2024
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facls are the shizzle. Seriously. I'm really not sure why people use chmod at all anymore. It's fewer characters, maybe?
For OP, a tool like
fd
can turn a script into a very short one-liner; and unlikefind
, it runs execs in parallel by default:will do the thing in parallel; the first line, for all the files; the second, for all the directories.
As others have said, if you're needing to do this a lot, it's best to fix whatever is setting the perms in the first place, or as @ricecake and others have said, set the perms/facls to be sticky so they get inherited.
facls are far more expressive than base perms, and are supported by every major, current, Linux filesystem. Not FAT, but ACLs on FAT FSes are all f'ed up anyway.
My guess is that it's not "the standard" for managing file ownership stuff, since it doesn't manage ownership. As a result, they're shown less often in tutorials and tool output.
The ownership semantics still needs to exist and get managed, and so a lot of less sophisticated software will just check ownership, not it's actual ability to access.
Tools and capabilities come quick, but the ecosystem as a whole moves glacially slow. Often that's good, because it means user land APIs and programs don't often just fail for no good reason, which creates the stability that makes it popular and useful. It also makes it painful to get "new stuff" into widespread use, where "new" means less than 30 years old.
You see the same thing with selinux. It's fine now! But it's still scary. And we'll finally have btrfs as the standard in 2040 I'll wager.