How to mount network drives in the Delphi service?

Question

I am new to Delphi, but I need to fix the Delphi code so that the network drives are mounted at the start of "Service start". By default, when my application runs through the Windows Service, network drives are not accessible to the application, so the solution is to insert the UNC mapping script into my service. Can you help me in this matter?

thanks a lot.

unit ALFTSASvcUnit;


interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, SvcMgr, Dialogs, ShellAPI, TLHelp32, StrUtils;

type
  TALFTSAService = class(TService)
    procedure ServiceStart(Sender: TService; var Started: Boolean);
    procedure ServiceStop(Sender: TService; var Stopped: Boolean);
    procedure ServiceExecute(Sender: TService);
  private
    { Private declarations }
    function CountSAAProcs(ProcName : string) : integer;
  public
    function GetServiceController: TServiceController; override;
    { Public declarations }
  end;

var
  ALFTSAService: TALFTSAService;
  ALLIANCE : string;
  ARCH : string;

implementation

{$R *.DFM}

function TALFTSAService.CountSAAProcs(ProcName : string) : integer;
var
  MyHandle : THandle;
  Struct: TProcessEntry32;
begin
  Result := 0;
  MyHandle:=CreateToolHelp32SnapShot(TH32CS_SNAPPROCESS, 0);
  Struct.dwSize:=Sizeof(TProcessEntry32);
  if Process32First(MyHandle, Struct) then
  begin
    if AnsiStartsText(ProcName, Struct.szExeFile) then
      inc(Result);
    while Process32Next(MyHandle, Struct) do
      if AnsiStartsText(ProcName, Struct.szExeFile) then
        inc(Result);
  end;
  CloseHandle(MyHandle);
//  LogMessage('Number of BS_ processes = ' + IntToStr(Result), EVENTLOG_INFORMATION_TYPE);
end;

procedure ServiceController(CtrlCode: DWord); stdcall;
begin
  ALFTSAService.Controller(CtrlCode);
end;

function TALFTSAService.GetServiceController: TServiceController;
begin
  Result := ServiceController;
end;

procedure TALFTSAService.ServiceStart(Sender: TService;
  var Started: Boolean);
begin
  ALLIANCE := 'C:\Alliance\Access';
  ARCH := 'win32';

  if (ALLIANCE <> '') and (ARCH <> '') then
  begin
    ShellExecute(0, 'open', PChar(ALLIANCE + '\BSS\BIN\' + ARCH + '\alestart.exe'), '', nil, SW_SHOWNORMAL) ;
    while (CountSAAProcs('bs_') < 5) do
      Sleep(10000);
    while (CountSAAProcs('mxs_') < 8) do
      Sleep(10000);
  end
  else
  begin
    LogMessage('Unable to find SWIFTAlliance environment variables %ALLIANCE%, %ARCH%');
    Status:=csStopped;
  end;
end;

procedure TALFTSAService.ServiceStop(Sender: TService; var Stopped: Boolean);
begin
  ShellExecute(0, 'open', PChar(ALLIANCE + '\BSS\BIN\' + ARCH + '\alestop.exe'), '', nil, SW_SHOWNORMAL) ;
  while (CountSAAProcs('bs_') > 0) do
    Sleep(10000);
  Sleep (10000);
  while (CountSAAProcs('aleempty') > 0) do
    Sleep(5000);
  Sleep(5000);
end;

procedure TALFTSAService.ServiceExecute(Sender: TService);
const
  SecBetweenRuns = 60;
var
  Count: Integer;
begin
  Count := 0;
  while not Terminated do
  begin
    Inc(Count);
    if Count >= SecBetweenRuns then
    begin
      Count := 0;
      if (CountSAAProcs('bs_') < 4) then
      begin
        Status:=csStopped;
        Break;
      end;
    end;
    Sleep(1000);
    ServiceThread.ProcessRequests(False);
  end;
end;

end.

Answer 1

It seems like this is not a Delphi problem assuming ShellExecute that is not working (not clear).

In this case, it may be a problem with access rights to the [network], and I suggest you choose one of two different solutions:

• ( ) // . , "system" , , .
• ShellExecute , "alestart.exe" ( , "alestart". exe '. , API CreateProcessWithLogonW. SeImpersonatePrivilege.

.