Question

我在delphi中有一个Windows服务的服务名称，我也知道如何从中获取句柄。我需要做的是停止服务，如果由于某种原因停止失败，我需要终止与服务相关的进程。问题是我有多个服务从同一个可执行文件运行，所以我不能使用可执行文件名来终止进程。这意味着我需要进程ID来终止正确的关联进程。如何从服务名称或句柄中获取此id或某种方式来终止正确的进程？

Answer 1

QueryServiceStatusEx？

Answer 2

请注意我只接受了这个解决方案，以便接受完整的delphi代码解决方案，所有这一切都归功于Jk，但我指的是正确的路径。

-

好的，我已经能够弄清楚如何使用Jk的答案，并在delphi中提出了这个解决方案。

供参考，这是Jk提供的链接：

QueryServiceStatusEx

我的解决方案：

unit Demo;

interface

uses
  Windows, Forms, SysUtils,
  StdCtrls, WinSvc, Controls, Classes;

type

  //Form for basic demo usage
  TForm6 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  end;

  //Record defined for use as return buffer
  _SERVICE_STATUS_PROCESS = record
    dwServiceType: DWORD;
    dwCurrentState: DWORD;
    dwControlsAccepted: DWORD;
    dwWin32ExitCode: DWORD;
    dwServiceSpecificExitCode: DWORD;
    dwCheckPoint: DWORD;
    dwWaitHint: DWORD;
    dwProcessId: DWORD;
    dwServiceFlags: DWORD;
  end;
  //Function Prototype
  function QueryServiceStatusEx(
  SC_HANDLE: SC_Handle;
  SC_STATUS_TYPE: Cardinal;
  out lpBuffer: _SERVICE_STATUS_PROCESS;
  cbBufSize: DWORD;
  out pcbBytesNeeded: LPDWORD
  ): BOOL; stdcall;


  //internal setup function
  function GetPid(sService: String; sMachine: String = '') : Cardinal;
var
  Form6: TForm6;

implementation

{$R *.dfm}
const
  // windows api library
  advapi32 = 'advapi32.dll';
  //define the api call
  function QueryServiceStatusEx;   external advapi32 name 'QueryServiceStatusEx';

//for demo usage
procedure TForm6.Button1Click(Sender: TObject);
begin
  Memo1.Lines.Add(IntToStr(Integer(GetPid('Service'))))
end;


function GetPid(sService: String; sMachine: String = '') : Cardinal;
var
  schm,
  schs: SC_Handle;
  SC_STATUS_TYPE: Cardinal;
  lpBuffer: _SERVICE_STATUS_PROCESS;
  cbBufSize: DWORD;
  pcbBytesNeeded: LPDWORD;
begin
  //open the service manager  (defined in WinSvc)
  schm := OpenSCManager(PChar(sMachine), nil, SC_MANAGER_CONNECT);
  //set the status type to SC_STATUS_PROCESS_INFO
  //this is currently the only value supported
  SC_STATUS_TYPE := $00000000;
  //set the buffer size to the size of the record
  cbBufSize := sizeof(_SERVICE_STATUS_PROCESS);
  if (schm>0) then
  begin
    //grab the service handle
    schs := OpenService(schm, PChar(sService), SERVICE_QUERY_STATUS);
    if (schs>0) then
    begin
      //call the function
      QueryServiceStatusEx(
      schs,
      SC_STATUS_TYPE,
      lpBuffer,
      cbBufSize,
      pcbBytesNeeded);
      CloseServiceHandle(schs);
    end;
    CloseServiceHandle(schm);
  end;
  Result := lpBuffer.dwProcessId;
end;



end.

请注意，并非包含所有外部命名和其他必需品。

Answer 3

Or use DSiWin32 for many useful functions，包括DSiGetProcessID。此代码由StackOverflow user (and programmer) Gabr.

编写

这是函数，供您自己参考。它会给你你想要的东西：

//Retrieves ID of the specified process. Requires Toolhelp API.
//  @returns False if ID cannot be retrieved. Check GetLastError - if it is 0, process
//       doesn't exist; otherwise it contains the Win32 error code.
//  @author  gabr
//  @since   2004-02-12
//
  function DSiGetProcessID(const processName: string; var processID: DWORD): boolean;
  var
    hSnapshot: THandle;
    procEntry: TProcessEntry32;
  begin
    Result := false;
    hSnapshot := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    if hSnapshot = 0 then
      Exit;
    try
      procEntry.dwSize := Sizeof(procEntry);
      if not Process32First(hSnapshot, procEntry) then
        Exit;
      repeat
        if AnsiSameText(procEntry.szExeFile, processName) then begin
          processID := procEntry.th32ProcessID;
          Result := true;
          break; // repeat
        end;
      until not Process32Next(hSnapshot, procEntry);
    finally DSiCloseHandleAndNull(hSnapshot); end;
  end; { DSiGetProcessID }

如何从Delphi中的服务名称/句柄中找到进程ID？

3 个答案: