SemaphoreRights Enumeration

Definition

public enum class SemaphoreRights

[System.Flags]
public enum SemaphoreRights

[System.Flags]
[System.Security.SecurityCritical]
public enum SemaphoreRights

[System.Flags]
[System.Runtime.InteropServices.ComVisible(false)]
public enum SemaphoreRights

[<System.Flags>]
type SemaphoreRights = 

[<System.Flags>]
[<System.Security.SecurityCritical>]
type SemaphoreRights = 

[<System.Flags>]
[<System.Runtime.InteropServices.ComVisible(false)>]
type SemaphoreRights = 

Public Enum SemaphoreRights

Vererbung

Object

ValueType

Enum

SemaphoreRights

Attribute

FlagsAttribute SecurityCriticalAttribute ComVisibleAttribute

Felder

Beispiele

Im folgenden Codebeispiel wird die Verwendung von Werten beim Erstellen und Verwenden von SemaphoreRightsSemaphoreAccessRule -Objekten veranschaulicht. Das Beispiel erstellt ein SemaphoreSecurity -Objekt, fügt Regeln hinzu, die verschiedene Rechte für den aktuellen Benutzer zulassen und verweigern, und zeigt das resultierende Regelpaar an. Das Beispiel lässt dann neue Rechte für den aktuellen Benutzer zu und zeigt das Ergebnis an, das zeigt, dass die neuen Rechte mit der vorhandenen AccessControlType.Allow Regel zusammengeführt werden.

using System;
using System.Threading;
using System.Security.AccessControl;
using System.Security.Principal;

public class Example
{
    public static void Main()
    {
        // Create a string representing the current user.
        string user = Environment.UserDomainName + "\\" + 
            Environment.UserName;

        // Create a security object that grants no access.
        SemaphoreSecurity mSec = new SemaphoreSecurity();

        // Add a rule that grants the current user the 
        // right to enter or release the semaphore.
        SemaphoreAccessRule rule = new SemaphoreAccessRule(user, 
            SemaphoreRights.Synchronize | SemaphoreRights.Modify, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        // Add a rule that denies the current user the 
        // right to change permissions on the semaphore.
        rule = new SemaphoreAccessRule(user, 
            SemaphoreRights.ChangePermissions, 
            AccessControlType.Deny);
        mSec.AddAccessRule(rule);

        // Display the rules in the security object.
        ShowSecurity(mSec);

        // Add a rule that allows the current user the 
        // right to read permissions on the semaphore. This rule
        // is merged with the existing Allow rule.
        rule = new SemaphoreAccessRule(user, 
            SemaphoreRights.ReadPermissions, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        ShowSecurity(mSec);
    }

    private static void ShowSecurity(SemaphoreSecurity security)
    {
        Console.WriteLine("\r\nCurrent access rules:\r\n");

        foreach(SemaphoreAccessRule ar in 
            security.GetAccessRules(true, true, typeof(NTAccount)))
        {
            Console.WriteLine("        User: {0}", ar.IdentityReference);
            Console.WriteLine("        Type: {0}", ar.AccessControlType);
            Console.WriteLine("      Rights: {0}", ar.SemaphoreRights);
            Console.WriteLine();
        }
    }
}

/*This code example produces output similar to following:

Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: ChangePermissions

        User: TestDomain\TestUser
        Type: Allow
      Rights: Modify, Synchronize


Current access rules:

        User: TestDomain\TestUser
        Type: Deny
      Rights: ChangePermissions

        User: TestDomain\TestUser
        Type: Allow
      Rights: Modify, ReadPermissions, Synchronize
 */

Imports System.Threading
Imports System.Security.AccessControl
Imports System.Security.Principal

Public Class Example

    Public Shared Sub Main()

        ' Create a string representing the current user.
        Dim user As String = Environment.UserDomainName _ 
            & "\" & Environment.UserName

        ' Create a security object that grants no access.
        Dim mSec As New SemaphoreSecurity()

        ' Add a rule that grants the current user the 
        ' right to enter or release the semaphore.
        Dim rule As New SemaphoreAccessRule(user, _
            SemaphoreRights.Synchronize _
            Or SemaphoreRights.Modify, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ' Add a rule that denies the current user the 
        ' right to change permissions on the semaphore.
        rule = New SemaphoreAccessRule(user, _
            SemaphoreRights.ChangePermissions, _
            AccessControlType.Deny)
        mSec.AddAccessRule(rule)

        ' Display the rules in the security object.
        ShowSecurity(mSec)

        ' Add a rule that allows the current user the 
        ' right to read permissions on the semaphore. This 
        ' rule is merged with the existing Allow rule.
        rule = New SemaphoreAccessRule(user, _
            SemaphoreRights.ReadPermissions, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ShowSecurity(mSec)

    End Sub 

    Private Shared Sub ShowSecurity(ByVal security As SemaphoreSecurity)
        Console.WriteLine(vbCrLf & "Current access rules:" & vbCrLf)

        For Each ar As SemaphoreAccessRule In _
            security.GetAccessRules(True, True, GetType(NTAccount))

            Console.WriteLine("        User: {0}", ar.IdentityReference)
            Console.WriteLine("        Type: {0}", ar.AccessControlType)
            Console.WriteLine("      Rights: {0}", ar.SemaphoreRights)
            Console.WriteLine()
        Next

    End Sub
End Class 

'This code example produces output similar to following:
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: ChangePermissions
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: Modify, Synchronize
'
'
'Current access rules:
'
'        User: TestDomain\TestUser
'        Type: Deny
'      Rights: ChangePermissions
'
'        User: TestDomain\TestUser
'        Type: Allow
'      Rights: Modify, ReadPermissions, Synchronize

Hinweise

Verwenden Sie die SemaphoreRights -Enumeration, um Beim Erstellen von SemaphoreSecurity Objekten Zugriffssteuerungsrechte anzugeben. Um Zugriffsrechte auf einen benannten Systemsemaphor anzuwenden, verwenden Sie SemaphoreSecurity -Objekte mit dem Semaphore.Semaphore(Int32, Int32, String, Boolean, SemaphoreSecurity) Konstruktor und der Semaphore.SetAccessControl -Methode.

Die numerischen Werte der zugrunde liegenden Windows-Zugriffsrechte finden Sie unter Synchronization Object Security and Access Rights (Windows).

Gilt für:

Weitere Informationen

• SemaphoreAccessRule
• SemaphoreSecurity