SemaphoreRights 枚举

定义

命名空间:

System.Security.AccessControl

程序集:

System.Threading.AccessControl.dll

包:

System.Threading.AccessControl v8.0.0

Source:

SemaphoreSecurity.cs

指定可应用于命名的系统信号量对象的访问控制权限。

此枚举支持其成员值的按位组合。

public enum class SemaphoreRights

[System.Flags]
public enum SemaphoreRights

[<System.Flags>]
type SemaphoreRights = 

Public Enum SemaphoreRights

继承

Object

ValueType

Enum

SemaphoreRights

属性

FlagsAttribute

字段

ChangePermissions	262144	更改与某个命名的信号量关联的安全性和审核规则的权限。
Delete	65536	删除命名的信号量的权限。
FullControl	2031619	对某个命名的信号量进行完全控制以及修改其访问规则和审核规则的权限。
Modify	2	释放命名的信号量的权限。
ReadPermissions	131072	打开并复制命名的信号量的访问规则和审核规则的权限。
Synchronize	1048576	在命名的信号量上进行等待的权限。
TakeOwnership	524288	更改命名的信号量的所有者的权限。

示例

下面的代码示例演示如何在创建和使用 对象时使用SemaphoreRightsSemaphoreAccessRule值。 该示例创建 一个 SemaphoreSecurity 对象，添加允许和拒绝当前用户的各种权限的规则，并显示生成的规则对。 然后，该示例允许当前用户的新权限并显示结果，显示新权限与现有 AccessControlType.Allow 规则合并。

注意

此示例不将安全对象附加到 对象 Semaphore ;请参阅 SemaphoreSecurity、 Semaphore.GetAccessControl 方法和 Semaphore.SetAccessControl。

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

注解

创建 SemaphoreSecurity 对象时，SemaphoreRights使用 枚举指定访问控制权限。 若要将访问权限应用于命名的系统信号灯，请将 对象与 构造函数和 Semaphore.SetAccessControl 方法一SemaphoreSecurity起使用Semaphore.Semaphore(Int32, Int32, String, Boolean, SemaphoreSecurity)。

有关基础 Windows 访问权限的数值，请参阅 同步对象安全和访问权限 (Windows) 。

另请参阅

• SemaphoreAccessRule
• SemaphoreSecurity