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/*
 * Copyright (c) 2006-2008 Hyperic, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.hyperic.sigar.win32;

import java.io.PrintStream;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;

import org.hyperic.sigar.Sigar;

public class Service extends Win32 {
    // Service State
    public static final int SERVICE_STOPPED          = 0x00000001;
    public static final int SERVICE_START_PENDING    = 0x00000002;
    public static final int SERVICE_STOP_PENDING     = 0x00000003;
    public static final int SERVICE_RUNNING          = 0x00000004;
    public static final int SERVICE_CONTINUE_PENDING = 0x00000005;
    public static final int SERVICE_PAUSE_PENDING    = 0x00000006;
    public static final int SERVICE_PAUSED           = 0x00000007;

    private static final String[] STATUS = {
        "Unknown",
        "Stopped",
        "Start Pending",
        "Stop Pending",
        "Running",
        "Continue Pending",
        "Pause Pending",
        "Paused"
    };
    
    // Service Controls
    private static final int CONTROL_START  = 0x00000000;
    private static final int CONTROL_STOP   = 0x00000001;
    private static final int CONTROL_PAUSE  = 0x00000002;
    private static final int CONTROL_RESUME = 0x00000003;

    // Service Control Manager object specific access types
    private static final int STANDARD_RIGHTS_REQUIRED = (int)0x000F0000L;

    private static final int SC_MANAGER_CONNECT            = 0x0001;
    private static final int SC_MANAGER_CREATE_SERVICE     = 0x0002;
    private static final int SC_MANAGER_ENUMERATE_SERVICE  = 0x0004;
    private static final int SC_MANAGER_LOCK               = 0x0008;
    private static final int SC_MANAGER_QUERY_LOCK_STATUS  = 0x0010;
    private static final int SC_MANAGER_MODIFY_BOOT_CONFIG = 0x0020;

    private static final int SC_MANAGER_ALL_ACCESS = 
        (STANDARD_RIGHTS_REQUIRED |
         SC_MANAGER_CONNECT             |
         SC_MANAGER_CREATE_SERVICE      |
         SC_MANAGER_ENUMERATE_SERVICE   |
         SC_MANAGER_LOCK                |
         SC_MANAGER_QUERY_LOCK_STATUS   |
         SC_MANAGER_MODIFY_BOOT_CONFIG);

    // Service object specific access type
    private static final int SERVICE_QUERY_CONFIG         = 0x0001;
    private static final int SERVICE_CHANGE_CONFIG        = 0x0002;
    private static final int SERVICE_QUERY_STATUS         = 0x0004;
    private static final int SERVICE_ENUMERATE_DEPENDENTS = 0x0008;
    private static final int SERVICE_START                = 0x0010;
    private static final int SERVICE_STOP                 = 0x0020;
    private static final int SERVICE_PAUSE_CONTINUE       = 0x0040;
    private static final int SERVICE_INTERROGATE          = 0x0080;
    private static final int SERVICE_USER_DEFINED_CONTROL = 0x0100;

    private static final int SERVICE_ALL_ACCESS =
        (STANDARD_RIGHTS_REQUIRED |
         SERVICE_QUERY_CONFIG           |
         SERVICE_CHANGE_CONFIG          |
         SERVICE_QUERY_STATUS           |
         SERVICE_ENUMERATE_DEPENDENTS   |
         SERVICE_START                  |
         SERVICE_STOP                   |
         SERVICE_PAUSE_CONTINUE         |
         SERVICE_INTERROGATE            |
         SERVICE_USER_DEFINED_CONTROL);
    
    private long manager;
    private long service;
    private String name;

    private Service() throws Win32Exception
    {
        this.manager = OpenSCManager("", SC_MANAGER_ALL_ACCESS);
    }

    public static native List getServiceNames(Sigar sigar, String ptql)
        throws Win32Exception;

    public static List getServiceNames() throws Win32Exception {
        return getServiceNames(null, null);
    }

    public static List getServiceConfigs(Sigar sigar, String exe)
        throws Win32Exception {

        List services = new ArrayList();
        List names = Service.getServiceNames(sigar,
                                             "Service.Exe.Ieq=" + exe);

        for (int i=0; i