On 2020-05-12 18:43, Chris Wagner wrote:
> On 2020-05-12 3:45 pm, David wrote:
>> The groups command in the cmd window on Windows 10 shows None as my first
>> group.
>> When I use the dir command to create a file, the security display
>> shows no error.
>> When I use the touch command to create a file, I get "The permissions
>> on ... are incorrectly ordered [NULL if first]
>
> Hi David. The first thing to realize is that POSIX permissions and Windows
> ACLs
> are almost impossible to reconcile. Best to pick one and ignore the other.
>
> https://cygwin.com/cygwin-ug-net/ntsec.html has additional information.
>
> To set your group you should do it in /etc/passwd.
> If you don't have one, do: mkpasswd > /etc/passwd
>
> Then edit the file and change the 4th field on the line with your username to
> the group Id for Users.
>
> david:*:123456:197153:
> ->
> david:*:123456:545:
>
> Then restart ALL Cygwin processes and id should show Users as your primary
> group. Any files created by a Windows process however will still put None as
> the group.
>
> Hope that helps.
Instead of groups, use id, which shows both ids and names by default, in a form
where you can easily distinguish names.
Cygwin can use AD DC and SAM entries, so it's better *NOT* to create /etc/passwd
and /etc/group files, and make tweaks in /etc/nsswitch.conf if required.
For user settings, you can change your primary group in Cygwin for a local SAM
account using e.g.:
$ net user $USER /Comment:"<cygwin group=\"Users\">"
among other options; see the *Note* below *The desc schema*:
https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-nsswitch-desc
for full details.
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in IEC units and prefixes, physical quantities in SI.]
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