Directory.SetAccessControl(String, DirectorySecurity) メソッド

定義

DirectorySecurity オブジェクトが示すアクセス制御リスト (ACL: Access Control List) エントリを、指定したディレクトリに適用します。Applies access control list (ACL) entries described by a DirectorySecurity object to the specified directory.

public:
 static void SetAccessControl(System::String ^ path, System::Security::AccessControl::DirectorySecurity ^ directorySecurity);
public static void SetAccessControl (string path, System.Security.AccessControl.DirectorySecurity directorySecurity);
static member SetAccessControl : string * System.Security.AccessControl.DirectorySecurity -> unit
Public Shared Sub SetAccessControl (path As String, directorySecurity As DirectorySecurity)

パラメーター

path
String

アクセス制御リスト (ACL) エントリの追加先または削除元となるディレクトリ。A directory to add or remove access control list (ACL) entries from.

directorySecurity
DirectorySecurity

path パラメーターが示すディレクトリに適用する ACL エントリを表す DirectorySecurity オブジェクト。A DirectorySecurity object that describes an ACL entry to apply to the directory described by the path parameter.

例外

directorySecurity パラメーターが null です。The directorySecurity parameter is null.

ディレクトリが見つかりませんでした。The directory could not be found.

path が正しくありません。The path was invalid.

現在のプロセスには、path で指定されたディレクトリへのアクセス権がありません。The current process does not have access to the directory specified by path.

または-or- 現在のプロセスには、ACL エントリを設定するための十分な特権がありません。The current process does not have sufficient privilege to set the ACL entry.

次の例では、GetAccessControlSetAccessControl メソッドを使用してアクセス制御リスト (ACL) エントリを追加し、ディレクトリから ACL エントリを削除します。The following example uses the GetAccessControl and the SetAccessControl methods to add an access control list (ACL) entry and then remove an ACL entry from a directory. この例を実行するには、有効なユーザーまたはグループ アカウントを指定する必要があります。You must supply a valid user or group account to run this example.

using namespace System;
using namespace System::IO;
using namespace System::Security::AccessControl;

// Adds an ACL entry on the specified directory for the
// specified account.
void AddDirectorySecurity(String^ directoryName, String^ account, 
     FileSystemRights rights, AccessControlType controlType)
{
    // Create a new DirectoryInfo object.
    DirectoryInfo^ dInfo = gcnew DirectoryInfo(directoryName);

    // Get a DirectorySecurity object that represents the
    // current security settings.
    DirectorySecurity^ dSecurity = dInfo->GetAccessControl();

    // Add the FileSystemAccessRule to the security settings.
    dSecurity->AddAccessRule( gcnew FileSystemAccessRule(account,
        rights, controlType));

    // Set the new access settings.
    dInfo->SetAccessControl(dSecurity);
}

// Removes an ACL entry on the specified directory for the
// specified account.
void RemoveDirectorySecurity(String^ directoryName, String^ account,
     FileSystemRights rights, AccessControlType controlType)
{
    // Create a new DirectoryInfo object.
    DirectoryInfo^ dInfo = gcnew DirectoryInfo(directoryName);

    // Get a DirectorySecurity object that represents the
    // current security settings.
    DirectorySecurity^ dSecurity = dInfo->GetAccessControl();

    // Add the FileSystemAccessRule to the security settings.
    dSecurity->RemoveAccessRule(gcnew FileSystemAccessRule(account,
        rights, controlType));

    // Set the new access settings.
    dInfo->SetAccessControl(dSecurity);
}    

int main()
{
    String^ directoryName = "TestDirectory";
    String^ accountName = "MYDOMAIN\\MyAccount";
    if (!Directory::Exists(directoryName))
    {
        Console::WriteLine("The directory {0} could not be found.", 
            directoryName);
        return 0;
    }
    try
    {
        Console::WriteLine("Adding access control entry for {0}",
            directoryName);

        // Add the access control entry to the directory.
        AddDirectorySecurity(directoryName, accountName,
            FileSystemRights::ReadData, AccessControlType::Allow);

        Console::WriteLine("Removing access control entry from {0}",
            directoryName);

        // Remove the access control entry from the directory.
        RemoveDirectorySecurity(directoryName, accountName, 
            FileSystemRights::ReadData, AccessControlType::Allow);

        Console::WriteLine("Done.");
    }
    catch (UnauthorizedAccessException^)
    {
        Console::WriteLine("You are not authorised to carry" +
            " out this procedure.");
    }
    catch (System::Security::Principal::
        IdentityNotMappedException^)
    {
        Console::WriteLine("The account {0} could not be found.", accountName);
    }
}

using System;
using System.IO;
using System.Security.AccessControl;

namespace FileSystemExample
{
    class DirectoryExample
    {
        public static void Main()
        {
            try
            {
                string DirectoryName = "TestDirectory";

                Console.WriteLine("Adding access control entry for " + DirectoryName);

                // Add the access control entry to the directory.
                AddDirectorySecurity(DirectoryName, @"MYDOMAIN\MyAccount", FileSystemRights.ReadData, AccessControlType.Allow);

                Console.WriteLine("Removing access control entry from " + DirectoryName);

                // Remove the access control entry from the directory.
                RemoveDirectorySecurity(DirectoryName, @"MYDOMAIN\MyAccount", FileSystemRights.ReadData, AccessControlType.Allow);

                Console.WriteLine("Done.");
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }

            Console.ReadLine();
        }

        // Adds an ACL entry on the specified directory for the specified account.
        public static void AddDirectorySecurity(string FileName, string Account, FileSystemRights Rights, AccessControlType ControlType)
        {
            // Create a new DirectoryInfo object.
            DirectoryInfo dInfo = new DirectoryInfo(FileName);

            // Get a DirectorySecurity object that represents the
            // current security settings.
            DirectorySecurity dSecurity = dInfo.GetAccessControl();

            // Add the FileSystemAccessRule to the security settings.
            dSecurity.AddAccessRule(new FileSystemAccessRule(Account,
                                                            Rights,
                                                            ControlType));

            // Set the new access settings.
            dInfo.SetAccessControl(dSecurity);
        }

        // Removes an ACL entry on the specified directory for the specified account.
        public static void RemoveDirectorySecurity(string FileName, string Account, FileSystemRights Rights, AccessControlType ControlType)
        {
            // Create a new DirectoryInfo object.
            DirectoryInfo dInfo = new DirectoryInfo(FileName);

            // Get a DirectorySecurity object that represents the
            // current security settings.
            DirectorySecurity dSecurity = dInfo.GetAccessControl();

            // Add the FileSystemAccessRule to the security settings.
            dSecurity.RemoveAccessRule(new FileSystemAccessRule(Account,
                                                            Rights,
                                                            ControlType));

            // Set the new access settings.
            dInfo.SetAccessControl(dSecurity);
        }
    }
}

Imports System.IO
Imports System.Security.AccessControl



Module DirectoryExample

    Sub Main()
        Try
            Dim DirectoryName As String = "TestDirectory"

            Console.WriteLine("Adding access control entry for " + DirectoryName)

            ' Add the access control entry to the directory.
            AddDirectorySecurity(DirectoryName, "MYDOMAIN\MyAccount", FileSystemRights.ReadData, AccessControlType.Allow)

            Console.WriteLine("Removing access control entry from " + DirectoryName)

            ' Remove the access control entry from the directory.
            RemoveDirectorySecurity(DirectoryName, "MYDOMAIN\MyAccount", FileSystemRights.ReadData, AccessControlType.Allow)

            Console.WriteLine("Done.")
        Catch e As Exception
            Console.WriteLine(e)
        End Try

        Console.ReadLine()

    End Sub


    ' Adds an ACL entry on the specified directory for the specified account.
    Sub AddDirectorySecurity(ByVal FileName As String, ByVal Account As String, ByVal Rights As FileSystemRights, ByVal ControlType As AccessControlType)
        ' Create a new DirectoryInfoobject.
        Dim dInfo As New DirectoryInfo(FileName)

        ' Get a DirectorySecurity object that represents the 
        ' current security settings.
        Dim dSecurity As DirectorySecurity = dInfo.GetAccessControl()

        ' Add the FileSystemAccessRule to the security settings. 
        dSecurity.AddAccessRule(New FileSystemAccessRule(Account, Rights, ControlType))

        ' Set the new access settings.
        dInfo.SetAccessControl(dSecurity)

    End Sub


    ' Removes an ACL entry on the specified directory for the specified account.
    Sub RemoveDirectorySecurity(ByVal FileName As String, ByVal Account As String, ByVal Rights As FileSystemRights, ByVal ControlType As AccessControlType)
        ' Create a new DirectoryInfo object.
        Dim dInfo As New DirectoryInfo(FileName)

        ' Get a DirectorySecurity object that represents the 
        ' current security settings.
        Dim dSecurity As DirectorySecurity = dInfo.GetAccessControl()

        ' Add the FileSystemAccessRule to the security settings. 
        dSecurity.RemoveAccessRule(New FileSystemAccessRule(Account, Rights, ControlType))

        ' Set the new access settings.
        dInfo.SetAccessControl(dSecurity)

    End Sub
End Module

注釈

SetAccessControl メソッドは、継承されていない ACL リストを表すファイルにアクセス制御リスト (ACL) エントリを適用します。The SetAccessControl method applies access control list (ACL) entries to a file that represents the noninherited ACL list.

注意事項

directorySecurity パラメーターに指定された ACL は、ディレクトリの既存の ACL を置き換えます。The ACL specified for the directorySecurity parameter replaces the existing ACL for the directory. 新しいユーザーにアクセス許可を追加するには、GetAccessControl メソッドを使用して既存の ACL を取得し、変更します。To add permissions for a new user, use the GetAccessControl method to obtain the existing ACL and modify it.

ACL は、特定のファイルまたはディレクトリに対する特定の操作に対する権限を持っている、または所有していない個人やグループを記述します。An ACL describes individuals and/or groups who have, or do not have, rights to specific actions on the given file or directory. 詳細については、「方法: アクセス制御リスト エントリを追加または削除する」を参照してください。For more information, see How to: Add or Remove Access Control List Entries.

SetAccessControl メソッドは、オブジェクトの作成後に変更された DirectorySecurity オブジェクトのみを保持します。The SetAccessControl method persists only DirectorySecurity objects that have been modified after object creation. DirectorySecurity オブジェクトが変更されていない場合は、ファイルに保存されません。If a DirectorySecurity object has not been modified, it will not be persisted to a file. そのため、1つのファイルから DirectorySecurity オブジェクトを取得し、別のファイルに同じオブジェクトを再適用することはできません。Therefore, it is not possible to retrieve a DirectorySecurity object from one file and reapply the same object to another file.

ACL 情報をあるファイルから別のファイルにコピーするには、次のようにします。To copy ACL information from one file to another:

  1. GetAccessControl メソッドを使用して、ソースファイルから DirectorySecurity オブジェクトを取得します。Use the GetAccessControl method to retrieve the DirectorySecurity object from the source file.

  2. コピー先ファイルの新しい DirectorySecurity オブジェクトを作成します。Create a new DirectorySecurity object for the destination file.

  3. ACL 情報を取得するには、ソース DirectorySecurity オブジェクトの GetSecurityDescriptorBinaryForm または GetSecurityDescriptorSddlForm メソッドを使用します。Use the GetSecurityDescriptorBinaryForm or GetSecurityDescriptorSddlForm method of the source DirectorySecurity object to retrieve the ACL information.

  4. 手順 3. で取得した情報をターゲット DirectorySecurity オブジェクトにコピーするには、SetSecurityDescriptorBinaryForm または SetSecurityDescriptorSddlForm メソッドを使用します。Use the SetSecurityDescriptorBinaryForm or SetSecurityDescriptorSddlForm method to copy the information retrieved in step 3 to the destination DirectorySecurity object.

  5. SetAccessControl メソッドを使用して、変換先の DirectorySecurity オブジェクトを変換先ファイルに設定します。Set the destination DirectorySecurity object to the destination file using the SetAccessControl method.

NTFS 環境では、ユーザーが親フォルダーに対して ListDirectory 権限を持っている場合、ReadAttributesReadExtendedAttributes がユーザーに付与されます。In NTFS environments, ReadAttributes and ReadExtendedAttributes are granted to the user if the user has ListDirectory rights on the parent folder. ReadAttributesReadExtendedAttributesを拒否するには、親ディレクトリの ListDirectory を拒否します。To deny ReadAttributes and ReadExtendedAttributes, deny ListDirectory on the parent directory.

適用対象

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