Re: POSIX acls

On Fri, 17 Jul 2026, Duncan McEwan wrote:

> First attempt:
>
> % mkdir test
> % getfacl test
> # file: test
> # owner: duncan
> # group: ecs
> user::rwx
> group::r-x
> other::---
> %  setfacl -d -m g::rwx test
> setfacl: test: acl_calc_mask() failed: Invalid argument
> setfacl: test: failed to set ACL mask
> % setfacl -d -m g::rwx,m::rwx test
> setfacl: test: acl_set_file() failed: Invalid argument
> %
>

When you set an initial ACL, you have to specify values for all of them, as the
example in the man-page shows. After that you can change only the bits you want.

So,

```
$ setfacl -d -m u::rwx,g::rx,o::rx,m::rwx test		# or even, u::,g::rwx,o::
$ setfacl -d -m g::rwx test
```

-RVP

PS. Maybe this might need to be stated clearly in the man-page.