Επεξεργασία

Κοινή χρήση μέσω

Get-ExecutionPolicy

  • Reference
Module:
Microsoft.PowerShell.Security

Gets the execution policies for the current session.

Syntax

Get-ExecutionPolicy
   [[-Scope] <ExecutionPolicyScope>]
   [-List]
   [<CommonParameters>]

Description

To display the execution policies for each scope in the order of precedence, use Get-ExecutionPolicy -List. To see the effective execution policy for your PowerShell session use Get-ExecutionPolicy with no parameters.

The effective execution policy is determined by execution policies that are set by Set-ExecutionPolicy and Group Policy settings.

For more information, see about_Execution_Policies.

Examples

Example 1: Get all execution policies

This command displays the execution policies for each scope in the order of precedence.

Get-ExecutionPolicy -List

Scope          ExecutionPolicy
-----          ---------------
MachinePolicy  Undefined
UserPolicy     Undefined
Process        Undefined
CurrentUser    AllSigned
LocalMachine   Undefined

The Get-ExecutionPolicy cmdlet uses the List parameter to display each scope's execution policy.

Example 2: Set an execution policy

This example shows how to set an execution policy for the local computer.

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope LocalMachine
Get-ExecutionPolicy -List

Scope ExecutionPolicy
        ----- ---------------
MachinePolicy       Undefined
   UserPolicy       Undefined
      Process       Undefined
  CurrentUser       AllSigned
 LocalMachine    RemoteSigned

The Set-ExecutionPolicy cmdlet uses the ExecutionPolicy parameter to specify the RemoteSigned policy. The Scope parameter specifies the default scope value, LocalMachine. To view the execution policy settings, use the Get-ExecutionPolicy cmdlet with the List parameter.

Example 3: Get the effective execution policy

This example shows how to display the effective execution policy for a PowerShell session.

PS> Get-ExecutionPolicy -List

        Scope ExecutionPolicy
        ----- ---------------
MachinePolicy       Undefined
   UserPolicy       Undefined
      Process       Undefined
  CurrentUser       AllSigned
 LocalMachine    RemoteSigned

PS> Get-ExecutionPolicy

AllSigned

The Get-ExecutionPolicy cmdlet uses the List parameter to display each scope's execution policy. The Get-ExecutionPolicy cmdlet is run without a parameter to display the effective execution policy, AllSigned.

Example 4: Unblock a script to run it without changing the execution policy

This example shows how the RemoteSigned execution policy prevents you from running unsigned scripts.

A best practice is to read the script's code and verify it's safe before using the Unblock-File cmdlet. The Unblock-File cmdlet unblocks scripts so they can run, but doesn't change the execution policy.

PS> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope LocalMachine

PS> Get-ExecutionPolicy

RemoteSigned

PS> .\Start-ActivityTracker.ps1

.\Start-ActivityTracker.ps1 : File .\Start-ActivityTracker.ps1 cannot be loaded.
The file .\Start-ActivityTracker.ps1 is not digitally signed.
The script will not execute on the system.
For more information, see about_Execution_Policies at https://go.microsoft.com/fwlink/?LinkID=135170.
At line:1 char:1
+ .\Start-ActivityTracker.ps1
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:) [], PSSecurityException
+ FullyQualifiedErrorId : UnauthorizedAccess

PS> Unblock-File -Path .\Start-ActivityTracker.ps1

PS> Get-ExecutionPolicy

RemoteSigned

PS> .\Start-ActivityTracker.ps1

Task 1:

The Set-ExecutionPolicy uses the ExecutionPolicy parameter to specify the RemoteSigned policy. The policy is set for the default scope, LocalMachine.

The Get-ExecutionPolicy cmdlet shows that RemoteSigned is the effective execution policy for the current PowerShell session.

The Start-ActivityTracker.ps1 script is executed from the current directory. The script is blocked by RemoteSigned because the script isn't digitally signed.

For this example, the script's code was reviewed and verified as safe to run. The Unblock-File cmdlet uses the Path parameter to unblock the script.

To verify that Unblock-File didn't change the execution policy, Get-ExecutionPolicy displays the effective execution policy, RemoteSigned.

The script, Start-ActivityTracker.ps1 is executed from the current directory. The script begins to run because it was unblocked by the Unblock-File cmdlet.

Parameters

-List

Gets all execution policy values for the session. By default, Get-ExecutionPolicy gets only the effective execution policy.

Type:SwitchParameter
Position:Named
Default value:None
Required:False
Accept pipeline input:False
Accept wildcard characters:False

-Scope

Specifies the scope that is affected by an execution policy.

The effective execution policy is determined by the order of precedence as follows:

  • MachinePolicy. Set by a Group Policy for all users of the computer.
  • UserPolicy. Set by a Group Policy for the current user of the computer.
  • Process. Affects only the current PowerShell session.
  • LocalMachine. Default scope that affects all users of the computer.
  • CurrentUser. Affects only the current user.
Type:ExecutionPolicyScope
Accepted values:CurrentUser, LocalMachine, MachinePolicy, Process, UserPolicy
Position:0
Default value:Effective execution policy
Required:False
Accept pipeline input:True
Accept wildcard characters:False

Inputs

None

You can't pipe objects to this cmdlet.

Outputs

ExecutionPolicy

The cmdlet always returns Unrestricted on Linux and macOS platforms. On Windows platforms it returns the current execution policy.

Notes

An execution policy is part of the PowerShell security strategy. Execution policies determine whether you can load configuration files, such as your PowerShell profile, or run scripts. And, whether scripts must be digitally signed before they are run.