Determine what access level you have in a network drive

Hi,

I'm trying to figure out what access level i have in a particular folder (do i have read access? do i have write access? or is access denied?)

i tried

fileattrib('\\ACGFS01.mw.na.cat.com\SharesAC\6Sigma988')

but that doesn't work....the results it gives me aren't accurate

ans =

            Name: '\\ACGFS01.mw.na.cat.com\SharesAC'
         archive: 0
          system: 0
          hidden: 0
       directory: 1
        UserRead: 1
       UserWrite: 1
     UserExecute: 1

for this case, it should tell me that i don't have read or write access...but it tells me i have both

Answer 1

[Walter Roberson]

Unfortunately this information is not certain to be available over NFS (Networked File System, originally for Sun's Unix), nor in connection to any networked file system which implements Access Control Lists.

[Darin McCoy]

so its just not possible? Is the root problem with the windows OS? or the design of NFS? or....?

[Walter Roberson]

It is a design limitation that applies to many networked file systems, having to do with the fact that most networked access requests do not really involve logging you on to the remote system, with a network process acting on your behalf. Authenticating that it is "really" you is a technical challenge. There are some file systems such as Kerebos (from MIT) that were designed to be able to securely work with access credentials through a network, but most networked file systems do not have that ability.

There is also a problem between Unix systems and Windows systems, in that there is a difference in semantics in some of the permission bits between the two, if I recall correctly.

Answer 2

[Campbell]

A work-around for the incompatibility of Window and Linux operating systems that I have used is to attempt to open a file in the directory of the NFS server, e.g.

f1 = fopen(fullfile(nfsDir, 'existingFile.txt', 'r');
readPermission = f1 > 0;
if readPermission, fclose(f1); end
f1 = fopen(fullfile(nfsDir, 'newFile.txt', 'w');
writePermission = f1 > 0;
if writePermission, fclose(f1); end