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Can not access files under Interix
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 Can not access files under Interix - May 7, '03, 2:52:36 PM
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sharon
Posts: 11
Joined: Sep. 9, '02,
Status: offline
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We have some files that were created by the anonymous ftp account under a directory that was created and used by our application running under Interix. When I try to see these files using the ' ls' command, I get Permission denied errors. So, I tried to ' chown' to my user account but I get Permission denied errors. I also tried the ' cacls' command but get Access is denied. (My user account is a member of the Administrators group. I also added my user account to the Backup Operators just to see if that would help.)
However, from a Windows explorer window, I can take ownership of these files. (I first get the security alert saying that I don' t have permission to view or edit.... but I can take ownership.) Is there anyway to do this via Interix? Occasionally our install scripts run into these same kind of permission problems and, if possible, I would like to be able to take care of them from within a script rather than forcing the installer to first make sure permissions are correct through Windows explorer.
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RE: Can not access files under Interix - May 7, '03, 3:40:03 PM
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markfunk
Posts: 670
Joined: Mar. 31, '03,
Status: online
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did you try the " chown" as a local Administrator ?
You can use " su +Administrator" or " login +Administrator"
mark
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RE: Can not access files under Interix - May 8, '03, 10:00:31 AM
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sharon
Posts: 11
Joined: Sep. 9, '02,
Status: offline
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Yes. I have tried su' ing to Administrator and I get the same error. What confuses me is that I am able to do this through the Windows Explorer as any member or the Adminstrator group.
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RE: Can not access files under Interix - May 8, '03, 10:38:02 AM
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jimraf
Posts: 17
Joined: Apr. 22, '03,
From: Boston, MA
Status: offline
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Sharon,
The " takeown" utility from Microsoft might be of help. It strips the ACL from a file.
I think it' s distributed in the recent (Windows 2000) Resource Kits, and as part of the VC6 samples. A search for " takeown" on msdn.microsoft.com should turn it up.
Jim
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RE: Can not access files under Interix - May 8, '03, 12:19:22 PM
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markfunk
Posts: 670
Joined: Mar. 31, '03,
Status: online
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quote:
ORIGINAL: sharon
Yes. I have tried su' ing to Administrator and I get the same error. What confuses me is that I am able to do this through the Windows Explorer as any member or the Adminstrator group.
==================
Explorer allows you to ' take ownership' .
chown allows you to ' change ownership'
These are not the same thing.
I think the problem is that when anon ftp created a file it created it with a limited number of ACEs. Probably just one ACE that allows access to anon ftp only. This will prevent Interix from displaying any file information (ie " ls -l" ) and chown/chmod currently won' t work.
I would appear that Interix has a bug that doesn' t handle this situation very well (ie. it' s not passing the correct parameters (to ZwCreateFile()?) when opening the file). Interix does try to use the Windows privileges to perform operations for the caller, but in this case its not doing something properly.
Using the Windows ' takeown' utility as Administrator or as a member of Administrators group, could work for you.
Takeown does 2 things: a) changes the owner of the file to " Administrators" and b) removes all ACEs so the file is completely unprotected.
At this point you can use Interix to chown(1) and chmod(1) the file to whatever ownership and permissions you desire.
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