UNIX for Dummies Questions & Answers

I have 2 Linux servers and 1 windows server. One Linux server has an NSF share which points to the windows server. The other Linux server rsyncs any data to the other Linux server containing the windows share. My issue is that everytime the Linux administrator rsync data to the linux server containing the NSF share, The ownership of the data on the windows side changes and I want the data to inherit the permission from the windows parent folder.

We removed the rsync switch -p but the ownership and permission still changes on the windows side affecting clients to allow mapping and copying.

Thank you for any advice or help u can give me.

Lace0047

Hi Lace0047,
I'm not sure I have a definitive answer for you but I'll throw my thoughts out here and see if it helps.

First, I just want to confirm you are using the "Windows Services for Unix" NFS sharing function on your Windows server. If you are not, please let us know what you are using as it might affect the outcome. Do you also have any sort of mapping between Windows and Linux users or are they independent of each other?
The simplest answer may be to run chown, chmod, or chgrp after the rsync completes in order for the permissions to match the parent folder. This would be pretty straight forward if there are not other files in the destination folder.
If there are files in the destination folder that were not put there by rsync, you could work around this by creating a staging area and doing the following:Is it possible for you to post the full rsync command being used. Rsync has a ton of switches and it may just take some time to figure out which combo of switches accomplish what you are trying to do. There is even a --chmod switch on rsync but the outcome varies depending on what other switches you are using.

Thanks,
Tony

Thank you for your reply.

I am using the Services for Network File System.

For the mapping, under the General Settings, I have Active Directory domain name checked with our domain listed. Always the same domain ownership shows up when files gets rsynced. I'm not too sure where it is defined to always use that domain account as its owner on Windows. Do you know where it would be defined? In the NFS shared setting in Windows, I have the Linux IP which mounts the Windows to have R/W and Root Allowed.

I thought about changing the files and folders permissions to its parent folder after the rsync ompletes but there are just too many files and folders to perform it under the whole volume in Windows.

The rsync command run by the 2nd Linux server to the Linux NFS server is

Code:

rsync --rsync-path=/usr/bin/rsync -av -l -z -e \"ssh -i /home/test/.ssh/newid\"

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Thank You.

The UNIX and Linux Forums

If your NFS client (windows machine) is mounting linux NFS resources you can modify the registry on windows to map anon gid and uid to a certain user on windows (which is at least present on linux server).

That way any user on windows machine will have permission as user you defined on your linux NFS server (passwd and group files) and windows client (registry).
Matching numbers of course

Search this on google :

Code:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ClientForNFS\CurrentVersion\Default

This is the most simple way to configure it.

More advanced ways would include actually using DC (krb, ldap etc.)
But that is a matter for some other topic.

Hope that helps a bit
Regards
Peasant.

Thank you for your reply.

My Windows server is the Server for NFS and the client is the Linux1 which has the Windows share mounted. Your instructions relates if the Windows server is the client. Can it still be done as a Windows being the NFS server?

---------- Post updated at 03:48 PM ---------- Previous update was at 03:38 PM ----------

Browsing the registry in Windows, I found the
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ServerforNFS\CurrentVersion\Exports\0

Changing the RestrictChown from value 0 to 1 may do the trick. It will restrict any changes to the ownership but allowing changes to the NFS share. I'll need to reboot the server and see if it works.

I also had the problem that the rsync not only caused the change of ownership but wiped the permissions completely. It may fix that problem as well.

Hello Lace0047,

As you haven't mentioned too many details about windows server which you have but trying to give you a suggestion on same, if you are having cygwin system. The option to ignore NTFS permissions has changed in Cygwin version 1.7. This might be what's causing the problem.
Try adding the 'noacl' flag to your Cygwin mounts in C:\cygwin\etc\fstab, for example:
none /cygdrive cygdrive user,noacl,posix=0 0 0

To run from target server:

Code:

 rsync -vrulpt --stats --rsh=ssh singh_user@server1:source_path target_path >> /target_path_logs 2>&1

Also if you see man page for rsync then you will find out the -p option is to preserve permissions as follows.

Thanks,
R. Singh