Re: cygwin potentially corrupting permissions?

[Greg Freemyer <greg dot freemyer at gmail dot com>]

On Thu, Sep 24, 2015 at 2:37 PM, Andrey Repin <anrdaemon@yandex.ru> wrote:
> Greetings, Greg Freemyer!
>
>> We seem to travel the same mailing lists.  This is my first time to cygwin's.
>
>> I saved your script as "lsacl.txt".  Then I used "cp lsacl.txt it" to
>> make a copy.
>
>> The copy is permission denied for reading.  Basic ls -l shows no
>> difference (as expected)
>
>> $ ls -l lsacl.sh it
>> ----rwx---+ 1 gaf None 1630 Sep 24 12:05 it
>> ----rwx---+ 1 gaf None 1630 Sep 24 12:00 lsacl.sh
>
> Notice the "+" at the end of basic POSIX access bits.
> And use getfacl (or native icacl(s)) to view real permissions.

I'm using Linda' script that does that, but here's the raw getfacl
output for 2 folders created in C:\    Note they have very different
ACLs.  Why?

$ getfacl /cygdrive/c/Test-dir-created-in-cygwin/
# file: /cygdrive/c/Test-dir-created-in-cygwin/
# owner: GAF
# group: None
user::rwx
group::r-x
group:root:rwx
group:Authenticated Users:rwx
group:SYSTEM:rwx
group:Users:r-x
mask:rwx
other:r-x
default:user::rwx
default:group::r-x
default:group:root:rwx
default:group:Authenticated Users:rwx
default:group:SYSTEM:rwx
default:group:Users:r-x
default:mask:rwx
default:other:r-x



$ getfacl /cygdrive/c/Test-dir-created-in-file-explorer/
# file: /cygdrive/c/Test-dir-created-in-file-explorer/
# owner: GAF
# group: None
user::---
group::---
group:root:rwx
group:Authenticated Users:rwx
group:SYSTEM:rwx
group:Users:r-x
mask:rwx
other:---
default:user::---
default:group::---
default:group:root:rwx
default:group:Authenticated Users:rwx
default:group:SYSTEM:rwx
default:group:Users:r-x
default:mask:rwx
default:other:---

That last one with the directory created via file explorer has truly
bizarre (to me) ACLs.  Normal?  If not, how do I fix it.

Note I have 2 different Win 7 boxes showing this same behavior.

>
>> But your script does show a difference:
>
>> $ ./lsacl.sh lsacl.sh it
>> [u::---,g::---,g:root:rwx,g:Authenticated Users:rwx,g:SYSTEM:rwx,g:Users:r-x,m:rwx,o:---/] lsacl.sh
>> [u::---,g::r-x,g:root:rwx,g:Authenticated Users:rwx,g:SYSTEM:rwx,g:Users:r-x,m:rwx,o:---/] it
>
>> My user id is "gaf".
>
>> fyi: I thought I knew how to read an ACL, but the above makes little
>> sense to me.  Note I can cat out "lsacl.sh", but I can't cat out "it".
>
> Your system seems to be mangled. There should be no "root" user.

hmm..... I think that is a "root" group, not a "root" user.

I seriously doubt I created a root as a group.  Are you sure that
isn't standard with cygwin?

note: I love using cygwin, but I'm not very knowledgeable about user
and group management in cygwin.  On the other hand, I'm pretty good at
it in Linux. (I'm a 30+ year UNIX/Linux user)

> Also, please avoid top posting as per list rules.

If I did, I will try to avoid it in the future.  This e-mail is
interspersed.  I assume that is desired.

Greg

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