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Java Native Access Platform
/* Copyright (c) 2010 EugineLev, All Rights Reserved
*
* The contents of this file is dual-licensed under 2
* alternative Open Source/Free licenses: LGPL 2.1 or later and
* Apache License 2.0. (starting with JNA version 4.0.0).
*
* You can freely decide which license you want to apply to
* the project.
*
* You may obtain a copy of the LGPL License at:
*
* http://www.gnu.org/licenses/licenses.html
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "LGPL2.1".
*
* You may obtain a copy of the Apache License at:
*
* http://www.apache.org/licenses/
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "AL2.0".
*/
package com.sun.jna.platform.win32;
import com.sun.jna.Memory;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.platform.win32.Winsvc.ENUM_SERVICE_STATUS_PROCESS;
import com.sun.jna.platform.win32.Winsvc.SC_HANDLE;
import com.sun.jna.ptr.IntByReference;
import java.io.Closeable;
/**
* Win32 Service Manager wrapper
* @author EugineLev
*/
public class W32ServiceManager implements Closeable {
SC_HANDLE _handle = null;
String _machineName = null;
String _databaseName = null;
/**
* Instantiate a W32ServiceManager for the local computer and the
* SERVICES_ACTIVE_DATABASE ("ServicesActive") database.
*
*
* The connection is not established until {@link #open(int)} is called.
*/
public W32ServiceManager() {
}
/**
* Instantiate a W32ServiceManager for the local computer and the
* SERVICES_ACTIVE_DATABASE ("ServicesActive") database.
*
*
* A connection is opened directly with the requested permissions.
*
* @param permissions requested permissions for access
*/
public W32ServiceManager(int permissions) {
open(permissions);
}
/**
* Instantiate a W32ServiceManager.
*
* @param machineName The name of the target computer. If the pointer is
* NULL or points to an empty string, the function
* connects to the service control manager on the local
* computer.
* @param databaseName The name of the service control manager database.
* This parameter should be set to "ServicesActive". If
* it is NULL, the "ServicesActive"
* (SERVICES_ACTIVE_DATABASE) database is opened by
* default.
*
* The connection is not established until {@link #open(int)} is called.
*/
public W32ServiceManager(String machineName, String databaseName) {
_machineName = machineName;
_databaseName = databaseName;
}
/**
* Instantiate a W32ServiceManager.
*
*
* A connection is opened directly with the requested permissions.
*
* @param machineName The name of the target computer. If the pointer is
* NULL or points to an empty string, the function
* connects to the service control manager on the local
* computer.
* @param databaseName The name of the service control manager database.
* This parameter should be set to "ServicesActive". If
* it is NULL, the "ServicesActive"
* (SERVICES_ACTIVE_DATABASE) database is opened by
* default.
* @param permissions requested permissions for access
*/
public W32ServiceManager(String machineName, String databaseName, int permissions) {
_machineName = machineName;
_databaseName = databaseName;
open(permissions);
}
/**
* (Re-)Opens the Service Manager with the supplied permissions.
*
* @param permissions Permissions.
*/
public void open(int permissions) {
close();
_handle = Advapi32.INSTANCE.OpenSCManager(
_machineName, _databaseName, permissions);
if (_handle == null) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
}
/**
* Closes the previously opened Service Manager.
*/
@Override
public void close() {
if (_handle != null) {
if (!Advapi32.INSTANCE.CloseServiceHandle(_handle)) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
_handle = null;
}
}
/**
* Opens a Service.
*
* @param serviceName Service name.
* @param permissions Permissions.
*
* @return Returns an opened service.
*/
public W32Service openService(String serviceName, int permissions) {
SC_HANDLE serviceHandle = Advapi32.INSTANCE.OpenService(
_handle, serviceName, permissions);
if (serviceHandle == null) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
return new W32Service(serviceHandle);
}
/**
* Gets the service manager handle.
*
* @return Returns the service manager handle.
*/
public SC_HANDLE getHandle() {
return _handle;
}
/**
* Enumerates services in the specified service control manager database.
* The name and status of each service are provided, along with additional
* data based on the specified information level.
*
* @param dwServiceType The type of services to be enumerated. This
* parameter can be one or more of the following
* values.
*
*
* Value Meaning {@link WinNT#SERVICE_DRIVER} Services of type
* {@link WinNT#SERVICE_KERNEL_DRIVER} and
* {@link WinNT#SERVICE_FILE_SYSTEM_DRIVER}. {@link WinNT#SERVICE_FILE_SYSTEM_DRIVER} File system
* driver services. {@link WinNT#SERVICE_KERNEL_DRIVER} Driver
* services. {@link WinNT#SERVICE_WIN32} Services of type
* {@link WinNT#SERVICE_WIN32_OWN_PROCESS} and
* {@link WinNT#SERVICE_WIN32_SHARE_PROCESS}. {@link WinNT#SERVICE_WIN32_OWN_PROCESS} Services that run
* in their own processes. {@link WinNT#SERVICE_WIN32_SHARE_PROCESS} Services that
* share a process with one or more other services. For more information,
* see Service Programs.
*
* @param dwServiceState The state of the services to be enumerated. This
* parameter can be one of the following values.
*
* Value Meaning {@link Winsvc#SERVICE_ACTIVE} Enumerates services that
* are in the following states:
* {@link Winsvc#SERVICE_START_PENDING}, {@link Winsvc#SERVICE_STOP_PENDING}, {@link Winsvc#SERVICE_RUNNING}, {@link Winsvc#SERVICE_CONTINUE_PENDING}, {@link Winsvc#SERVICE_PAUSE_PENDING},
* and {@link Winsvc#SERVICE_PAUSED}. {@link Winsvc#SERVICE_INACTIVE} Enumerates services that
* are in the {@link Winsvc#SERVICE_STOPPED} state. {@link Winsvc#SERVICE_STATE_ALL} Combines the following
* states: {@link Winsvc#SERVICE_ACTIVE} and
* {@link Winsvc#SERVICE_INACTIVE}.
* @param groupName The load-order group name. If this parameter is a
* string, the only services enumerated are those that
* belong to the group that has the name specified by
* the string. If this parameter is an empty string,
* only services that do not belong to any group are
* enumerated. If this parameter is NULL, group
* membership is ignored and all services are
* enumerated.
*
* @return array of ENUM_SERVICE_STATUS_PROCESS structures.
*/
public ENUM_SERVICE_STATUS_PROCESS[] enumServicesStatusExProcess(int dwServiceType, int dwServiceState, String groupName) {
IntByReference pcbBytesNeeded = new IntByReference(0);
IntByReference lpServicesReturned = new IntByReference(0);
IntByReference lpResumeHandle = new IntByReference(0);
Advapi32.INSTANCE.EnumServicesStatusEx(_handle, Winsvc.SC_ENUM_PROCESS_INFO, dwServiceType, dwServiceState, Pointer.NULL, 0, pcbBytesNeeded, lpServicesReturned, lpResumeHandle, groupName);
int lastError = Kernel32.INSTANCE.GetLastError();
if (lastError != WinError.ERROR_MORE_DATA) {
throw new Win32Exception(lastError);
}
Memory buffer = new Memory(pcbBytesNeeded.getValue());
boolean result = Advapi32.INSTANCE.EnumServicesStatusEx(_handle, Winsvc.SC_ENUM_PROCESS_INFO, dwServiceType, dwServiceState, buffer, (int) buffer.size(), pcbBytesNeeded, lpServicesReturned, lpResumeHandle, groupName);
if (!result) {
throw new Win32Exception(Kernel32.INSTANCE.GetLastError());
}
if (lpServicesReturned.getValue() == 0) {
return new Winsvc.ENUM_SERVICE_STATUS_PROCESS[0];
}
ENUM_SERVICE_STATUS_PROCESS status = Structure.newInstance(ENUM_SERVICE_STATUS_PROCESS.class, buffer);
status.read();
return (ENUM_SERVICE_STATUS_PROCESS[]) status.toArray(lpServicesReturned.getValue());
}
}