MutexSecurity.RemoveAccessRuleAll(MutexAccessRule) Método
Definição
Pesquisa por todas as regras de controle de acesso com o mesmo usuário e AccessControlType (permitir ou negar) como a regra especificada e, se encontradas, remove-as.Searches for all access control rules with the same user and AccessControlType (allow or deny) as the specified rule and, if found, removes them.
public:
void RemoveAccessRuleAll(System::Security::AccessControl::MutexAccessRule ^ rule);
public void RemoveAccessRuleAll (System.Security.AccessControl.MutexAccessRule rule);
override this.RemoveAccessRuleAll : System.Security.AccessControl.MutexAccessRule -> unit
Public Sub RemoveAccessRuleAll (rule As MutexAccessRule)
Parâmetros
- rule
- MutexAccessRule
Um MutexAccessRule que especifica o usuário e o AccessControlType pelos quais pesquisar.A MutexAccessRule that specifies the user and AccessControlType to search for. Todos os direitos especificados por essa regra são ignorados.Any rights specified by this rule are ignored.
Exceções
rule é null.rule is null.
Exemplos
O exemplo de código a seguir mostra que o RemoveAccessRuleAll método remove todas as regras que correspondem ao usuário e AccessControlType , ignorando os direitos.The following code example shows that the RemoveAccessRuleAll method removes all rules that match user and AccessControlType, ignoring rights.
O exemplo cria um MutexSecurity objeto, adiciona regras que permitem e negam vários direitos para o usuário atual e, em seguida, mescla direitos adicionais à Allow regra.The example creates a MutexSecurity object, adds rules that allow and deny various rights for the current user, and then merges additional rights into the Allow rule. Em seguida, o exemplo cria uma nova regra que permite que o usuário atual assuma a propriedade e usa essa regra para remover a Allow regra do MutexSecurity objeto.The example then creates a new rule that allows the current user to take ownership, and uses that rule to remove the Allow rule from the MutexSecurity object.
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);
// Create a rule that allows the current user to
// change the owner of the mutex, and use that rule
// to remove the existing allow access rule from
// the MutexSecurity object, showing that the user
// and access type must match, while the rights are
// ignored.
Console.WriteLine("Use RemoveAccessRuleAll to remove the Allow rule.");
rule = new MutexAccessRule(user,
MutexRights.TakeOwnership,
AccessControlType.Allow);
mSec.RemoveAccessRuleAll(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
Use RemoveAccessRuleAll to remove the Allow rule.
Current access rules:
User: TestDomain\TestUser
Type: Deny
Rights: ChangePermissions
*/
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)
' Create a rule that allows the current user to
' change the owner of the mutex, and use that rule
' to remove the existing allow access rule from
' the MutexSecurity object, showing that the user
' and access type must match, while the rights are
' ignored.
Console.WriteLine("Use RemoveAccessRuleAll to remove the Allow rule.")
rule = New MutexAccessRule(user, _
MutexRights.TakeOwnership, _
AccessControlType.Allow)
mSec.RemoveAccessRuleAll(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
'
'Use RemoveAccessRuleAll to remove the Allow rule.
'
'Current access rules:
'
' User: TestDomain\TestUser
' Type: Deny
' Rights: ChangePermissions
Comentários
O MutexSecurity objeto atual é procurado por regras que têm o mesmo usuário e o mesmo AccessControlType valor de rule .The current MutexSecurity object is searched for rules that have the same user and the same AccessControlType value as rule. Todos os direitos especificados por rule são ignorados durante a execução dessa pesquisa.Any rights specified by rule are ignored when performing this search. Se nenhuma regra de correspondência for encontrada, nenhuma ação será executada.If no matching rules are found, no action is taken.