Question

I don’t know if this is by design or not, but I cannot seem to create a new Semaphore on Windows 7 as a Standard User, or a Power User for that matter.

SemaphoreSecurity semSec = new SemaphoreSecurity(); 

// have also tried "Power Users", "Everyone", etc. 
SemaphoreAccessRule rule = new SemaphoreAccessRule("Users", SemaphoreRights.FullControl, AccessControlType.Allow);   

semSec.AddAccessRule(rule);

bool createdNew = false;

// throws exception 
sem = new Semaphore(1, 1, SEMAPHORE_ID, out createdNew, semSec);  

return true; 

I am receiving an UnauthorizedAccessException with the message “Access to the port is denied.”

Is this possible?

Answer 1

After some more research and trying things out I finally solved this,

The key is to prepend “Global\” to the semaphore name, ie,

    const string NAME = "Global\\MySemaphore"; 

Thanks.