The OpenService function opens a handle to an existing service.
SC_HANDLE OpenService(
SC_HANDLE hSCManager, |
// handle to service control manager database |
LPCTSTR lpServiceName, |
// pointer to name of service to start |
DWORD dwDesiredAccess |
// type of access to service |
); |
The STANDARD_RIGHTS_REQUIRED constant enables the following service object access types:
Standard rights |
Description |
DELETE |
Enables calling of the DeleteService function to delete the service. |
READ_CONTROL |
Enables calling of the QueryServiceObjectSecurity function to query the security descriptor of the service object. |
WRITE_DAC|WRITE_OWNER |
Enables calling of the SetServiceObjectSecurity function to modify the security descriptor of the service object. |
You can specify any or all of the following service object access types:
Access |
Description |
SERVICE_ALL_ACCESS |
Includes STANDARD_RIGHTS_REQUIRED in addition to all of the access types listed in this table. |
SERVICE_CHANGE_CONFIG |
Enables calling of the ChangeServiceConfig function to change the service configuration. |
SERVICE_ENUMERATE_DEPENDENTS |
Enables calling of the EnumDependentServices function to enumerate all the services dependent on the service. |
SERVICE_INTERROGATE |
Enables calling of the ControlService function to ask the service to report its status immediately. |
SERVICE_PAUSE_CONTINUE |
Enables calling of the ControlService function to pause or continue the service. |
SERVICE_QUERY_CONFIG |
Enables calling of the QueryServiceConfig function to query the service configuration. |
SERVICE_QUERY_STATUS |
Enables calling of the QueryServiceStatus function to ask the service control manager about the status of the service. |
SERVICE_START |
Enables calling of the StartService function to start the service. |
SERVICE_STOP |
Enables calling of the ControlService function to stop the service. |
SERVICE_USER_DEFINED_CONTROL |
Enables calling of the ControlService function to specify a user-defined control code. |
You can specify any of the following generic access types:
Generic access |
Service access |
GENERIC_READ |
Combines the following access types: STANDARD_RIGHTS_READ, SERVICE_QUERY_CONFIG, SERVICE_QUERY_STATUS, and SERVICE_ENUMERATE_DEPENDENTS. |
GENERIC_WRITE |
Combines the following access types: STANDARD_RIGHTS_WRITE and SERVICE_CHANGE_CONFIG. |
GENERIC_EXECUTE |
Combines the following access types: STANDARD_RIGHTS_EXECUTE, SERVICE_START, SERVICE_STOP, SERVICE_PAUSE_CONTINUE, SERVICE_INTERROGATE, and SERVICE_USER_DEFINED_CONTROL. |
If the function succeeds, the return value is a handle to the service.
If the function fails, the return value is NULL. To get extended error information, call GetLastError.
The following error codes can be set by the service control manager. Others can be set by the registry functions that are called by the service control manager.
Error code |
Meaning |
ERROR_ACCESS_DENIED |
The specified service control manager database handle does not have access to the service. |
ERROR_INVALID_HANDLE |
The specified handle is invalid. |
ERROR_INVALID_NAME |
The specified service name is invalid. |
ERROR_SERVICE_DOES_NOT_EXIST |
The specified service does not exist. |
The returned handle is only valid for the process that called OpenService. It can be closed by calling the CloseServiceHandle function.
ChangeServiceConfig, ControlService, CreateService, DeleteService, EnumDependentServices, OpenSCManager, QueryServiceConfig, QueryServiceObjectSecurity, QueryServiceStatus, SetServiceObjectSecurity, StartService
file: /Techref/os/win/api/win32/func/src/f66_10.htm, 9KB, , updated: 2000/4/7 11:19, local time: 2024/11/23 20:58,
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