MutexAccessRule Konstruktoren

Quelle:

MutexSecurity.cs

Quelle:

MutexSecurity.cs

Quelle:

MutexSecurity.cs

public:
 MutexAccessRule(System::Security::Principal::IdentityReference ^ identity, System::Security::AccessControl::MutexRights eventRights, System::Security::AccessControl::AccessControlType type);

public MutexAccessRule (System.Security.Principal.IdentityReference identity, System.Security.AccessControl.MutexRights eventRights, System.Security.AccessControl.AccessControlType type);

new System.Security.AccessControl.MutexAccessRule : System.Security.Principal.IdentityReference * System.Security.AccessControl.MutexRights * System.Security.AccessControl.AccessControlType -> System.Security.AccessControl.MutexAccessRule

Public Sub New (identity As IdentityReference, eventRights As MutexRights, type As AccessControlType)

Parameter

Ausnahmen

Hinweise

Um auf eine Mutex (durch Aufrufen der WaitOne- WaitAny oder WaitAll -Methode) zu warten, muss ein Benutzer Zugriff haben MutexRights.Synchronize . Um den Mutex loszulassen, muss der Benutzer durch Aufrufen der ReleaseMutex -Methode Zugriff haben MutexRights.Modify .

Quelle:

MutexSecurity.cs

Quelle:

MutexSecurity.cs

Quelle:

MutexSecurity.cs

public:
 MutexAccessRule(System::String ^ identity, System::Security::AccessControl::MutexRights eventRights, System::Security::AccessControl::AccessControlType type);

public MutexAccessRule (string identity, System.Security.AccessControl.MutexRights eventRights, System.Security.AccessControl.AccessControlType type);

new System.Security.AccessControl.MutexAccessRule : string * System.Security.AccessControl.MutexRights * System.Security.AccessControl.AccessControlType -> System.Security.AccessControl.MutexAccessRule

Public Sub New (identity As String, eventRights As MutexRights, type As AccessControlType)

Parameter

Ausnahmen

Beispiele

Im folgenden Codebeispiel wird die Verwendung dieses Konstruktors zum Erstellen MutexAccessRule von Objekten veranschaulicht. Das Beispiel erstellt ein MutexSecurity -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 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.
        MutexSecurity mSec = new MutexSecurity();

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

        // Add a rule that denies the current user the 
        // right to change permissions on the mutex.
        rule = new MutexAccessRule(user, 
            MutexRights.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 mutex. This rule
        // is merged with the existing Allow rule.
        rule = new MutexAccessRule(user, 
            MutexRights.ReadPermissions, 
            AccessControlType.Allow);
        mSec.AddAccessRule(rule);

        ShowSecurity(mSec);
    }

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

        foreach(MutexAccessRule 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.MutexRights);
            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 MutexSecurity()

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

        ' Add a rule that denies the current user the 
        ' right to change permissions on the mutex.
        rule = New MutexAccessRule(user, _
            MutexRights.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 mutex. This rule
        ' is merged with the existing Allow rule.
        rule = New MutexAccessRule(user, _
            MutexRights.ReadPermissions, _
            AccessControlType.Allow)
        mSec.AddAccessRule(rule)

        ShowSecurity(mSec)

    End Sub 

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

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

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

Um auf eine Mutex (durch Aufrufen der WaitOne- WaitAny oder WaitAll -Methode) zu warten, muss ein Benutzer Zugriff haben MutexRights.Synchronize . Um den Mutex freizugeben, muss der Benutzer zugriff habenMutexRights.Modify, indem er die ReleaseMutex -Methoden aufruft.

Dieser Konstruktor entspricht dem Erstellen eines NTAccount Objekts, indem an den NTAccount.NTAccount(String) Konstruktor übergeben identity und das neu erstellte NTAccount Objekt an den MutexAccessRule(IdentityReference, MutexRights, AccessControlType) Konstruktor übergeben wird.