MutexAccessRule.MutexRights Propriedade
Definição
Obtém os direitos permitidos ou negados pela regra de acesso.Gets the rights allowed or denied by the access rule.
public:
property System::Security::AccessControl::MutexRights MutexRights { System::Security::AccessControl::MutexRights get(); };
public System.Security.AccessControl.MutexRights MutexRights { get; }
member this.MutexRights : System.Security.AccessControl.MutexRights
Public ReadOnly Property MutexRights As MutexRights
Valor da propriedade
Uma combinação bit a bit de valores MutexRights que indicam os direitos permitidos ou negados pela regra de acesso.A bitwise combination of MutexRights values indicating the rights allowed or denied by the access rule.
Exemplos
O exemplo de código a seguir demonstra o uso da MutexRights propriedade para exibir os direitos no conjunto de regras contidas em um MutexSecurity objeto.The following code example demonstrates the use of the MutexRights property to display the rights in the set of rules contained in a MutexSecurity object. O exemplo cria um MutexSecurity objeto, adiciona regras que permitem e negam vários direitos para o usuário atual e exibe o par de regras resultante.The example creates a MutexSecurity object, adds rules that allow and deny various rights for the current user, and displays the resulting pair of rules. Em seguida, o exemplo permite novos direitos para o usuário atual e exibe o resultado, mostrando que os novos direitos são mesclados com a Allow regra existente.The example then allows new rights for the current user and displays the result, showing that the new rights are merged with the existing Allow rule.
Observação
Este exemplo não anexa o objeto de segurança a um Mutex objeto.This example does not attach the security object to a Mutex object. Exemplos que anexam objetos de segurança podem ser encontrados em Mutex.GetAccessControl e Mutex.SetAccessControl .Examples that attach security objects can be found in Mutex.GetAccessControl and Mutex.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.
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
Comentários
MutexAccessRule os objetos são imutáveis.MutexAccessRule objects are immutable. Você pode criar uma nova regra de acesso que represente um usuário diferente, direitos diferentes ou um diferente AccessControlType , mas não pode modificar uma regra de acesso existente.You can create a new access rule representing a different user, different rights, or a different AccessControlType, but you cannot modify an existing access rule.