MutexRights Enumeration
Assembly: mscorlib (in mscorlib.dll)
| Member name | Description | |
|---|---|---|
| ChangePermissions | The right to change the security and audit rules associated with a named mutex. | |
| Delete | The right to delete a named mutex. | |
| FullControl | The right to exert full control over a named mutex, and to modify its access rules and audit rules. | |
| Modify | The right to release a named mutex. | |
| ReadPermissions | The right to open and copy the access rules and audit rules for a named mutex. | |
| Synchronize | The right to wait on a named mutex. | |
| TakeOwnership | The right to change the owner of a named mutex. |
Use the MutexRights enumeration to specify access control rights when you create MutexSecurity objects. To apply access rights to a named system mutex, use MutexSecurity objects with the Mutex constructor and the Mutex.SetAccessControl method.
Note: |
|---|
| Security on synchronization objects is not supported for Windows 98 or Windows Millennium Edition. |
The following code example demonstrates the use of MutexRights values when creating and using MutexAccessRule objects. The example creates an MutexSecurity object, adds rules that allow and deny various rights for the current user, and displays the resulting pair of rules. The example then allows new rights for the current user and displays the result, showing that the new rights are merged with the existing AccessControlType.Allow rule.
Note: |
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| This example does not attach the security object to a Mutex object; see MutexSecurity, Mutex.GetAccessControl method, 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 */
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.
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