cygwin permissions problem on a network drive

[Markus Leuthold]

On Jul  5 10:59, Corinna Vinschen wrote:
> On Jul  5 12:21, Bill Metzenthen wrote:
> > What should I ask the system administrator to change so that cygwin
> > will once again work on this drive? Perhaps there is some new setting
> > (or an old one which has somehow changed) for cygwin that I have
> > failed to notice?
>
> If you want to discuss this with your admin, the problem is this:  When
> Cygwin 1.7.9 tries to create a file on a filesystem which supports ACLs,
> it requests WRITE_DAC permissions in the open call.  WRITE_DAC is the
> access right you need to create the permission bits in the file's ACL,
> what you see in Explorer under the Security tab.
>
> Now, in some environments, the settings of the shares are so, that this
> right is apparently not granted, even for the creator of the file.
> But, as far as earlier reports go, there seem to be no indication of
> this in the ACL.  As I mentioned above, I experimented with this
> myself, but I have never managed to reproduce this setting on the 
server.
> So I neither know how this setting looks like, nor if there's a way
> to recognize such a share.
>
>Btw, if you're going to discuss this with your admin, and if you figure
>out what server setting is the culprit, I would be glad if you could
>share the information with us.  It might be a great help in developing
>Cygwin further.
>
>
>Thanks,
>Corinna


Hello Corinna

I've run into the same problem on a DFS filesystem, and I asked our 
admins about the settings. Please find a screenshot here: 
http://titlis.org/serversettings.png

The reason why "change permission" (=WRITE_DAC) was disabled: Our admins 
don't want to allow "take ownership" to everybody, since in the past users 
managed to set the rights such that even the admins couldn't access the 
file anymore. Since "take ownership" automatically enables "change 
permissions", WRITE_DAC is thus disabled too.

hope that helps

best regards, Kusi

PS: your workaround works fine, too



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