I am creating an appcation on Vista,which include a service and a Console application .Both running in same user account
In service i am creating an event and waits for that event.In console application i am opening the same event (problem starts here) and calling SetEvent function. I can not open the event (getting error 5,Access is denied) in the console application.I searched in the net and saw something about integrity level (I am not sure that the problem is related to integrity level).Its telling that service and applicaation got differnt integrity levels.
here is the part of the code,where IPC occures
service
DWORD
WINAPI IpcThread(LPVOID lpParam)
{
HANDLE ghRequestEvent = NULL ;
ghRequestEvent = CreateEvent(NULL, FALSE,
FALSE, "Global\\Event1") ; //creating the event
if(NULL == ghRequestEvent)
{
//error
}
while(1)
{
WaitForSingleObject(ghRequestEvent, INFINITE) //waiting for the event
//here some action related to event
}
}
Console Application
Here in application ,opening the event and seting the event
unsigned int
event_notification()
{
HANDLE ghRequestEvent = NULL ;
ghRequestEvent = OpenEvent(SYNCHRONIZE|EVENT_MODIFY_STATE, FALSE, "Global\\Event1") ;
if(NULL == ghRequestEvent)
{
//error
}
SetEvent(ghRequestEvent) ;
}
I am running both application (serivce and console application) with administrative privilege (i logged in as Administraor and running the console application by right clicking and using the option "run as administrator") .
The error i am getting in console application (where i am opening the event) is error no 5(Access is denied. ) .
So it will be very helpfull if you tell how to do the IPC between a service and an application in Vista
Thanks in advance
Navaneeth
Best Answer
Are the service and the application running as the same user with different integrity levels, or are they running as different users?
If it is the former, then this article from MSDN which talks about integrity levels might help. They have some sample code for lowering the integrity level of a file. I'm not sure that this could be relevant for an event though.
If it is the latter you might look at this link which suggests creating a NULL ACL and associating it with the object (in the example it is a named pipe, but the approach is similar for an event I'm sure: