CODEWITHSUNDEEP
powershell
Ryan Schlagel
Ryan Schlagel

Reputation: 79

Check for Access Denied on UNC Path

Using PowerShell, I'm struggling to locate a mechanism to determine if a path truely doesn't exist or if I don't have permissions to it. For instance, if I use the "Test-Path" commandlet on a path that is valid but I don't have permissions to, the result will be $false. I would prefer to use a try / catch block to try the command and catch an unathorizedAccessException exception or a ItemNotFoundException exception and handle the responses accordingly.

Any assistance would be appreciated.

Upvotes: 0

Views: 4913

Answers (2)

Piyush Soni
Piyush Soni

Reputation: 43

Probably if you are using invoke command and Acces Denied is coming then you need to use Cred-SSP .

For example: 

$UserName='<username>'
$securekey= ConvertTo-SecureString '<secure-key>' -AsPlainText -Force;
$credentialdetail= New-Object System.Management.Automation.PSCredential -ArgumentList $UserName,$securekey;

Invoke-Command -Credentials $credentialdetail -ComputerName '<computername>' -Authentication CredSSP -ScriptBlock { '<...>' }

Upvotes: 1

CB.
CB.

Reputation: 60918

Personally I use this .net code to catch the exception accessing a share or local path:

add this type in powershell

add-type @"
using System;
using System.IO;

public class CheckFolderAccess {

 public static string HasAccessToWrite(string path)
        {
            try
            {
                using  (FileStream fs = File.Create(Path.Combine(path, "Testing.txt"), 1, FileOptions.DeleteOnClose))
                { }
                return "Allowed";
            }
            catch (Exception e)
            {
                return e.Message;
            }
        }

}
"@

use it in this way:

> [checkfolderaccess]::HasAccessToWrite("\\server\c$\system volume information")
Access to path '\\server\c$\system volume information\Testing.txt' denied.


> [checkfolderaccess]::HasAccessToWrite("\\nonexistingserver\nonexistingpath")
Path not found.

Upvotes: 0

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