Re: Executing command without flashing shell window

[Attila <ejjeliorjarat@...>]

On Thu, 15 Apr 2010 20:04:04 +0300, T T <t34www@googlemail.com> wrote:

> 2010/4/15 Enrico Colombini <erix@erix.it>:
...
> This won't help, you will get to console windows: one for the start
> command and another one (minimized) for "started" cmd.  There is no
> way to get rid of the flashing window effect other than to pass the
> appropriate flags to CreateProcess API (either DETACHED_PROCESS or
> CREATE_NO_WINDOW in creation flags or SW_HIDE in startup info).
>
> Anyway, the OP should use io.popen instead of os.execute to get the  
> output.
>
> Cheers,
>
> Tomek

ntlua.start use that exactly, and if I am correct, I managed to do it  
months ago, but don't remember, how.
ntlua.start definition is:

static int ntlua_start(lua_State * L)
{
  char *command_line = get_string(L, "start", 1);
  int wait = luaL_optinteger(L, 2, 0);
  if (!utlStartProcess(command_line, wait))
    print_error(L, "start: can not start process.");
  return 0;
}

From process.c:

int utlStartProcess(char* command_line, int wait)
{
  WORD flags = NORMAL_PRIORITY_CLASS;
  STARTUPINFO si ;
  PROCESS_INFORMATION*  pi = (PROCESS_INFORMATION*)  
malloc(sizeof(PROCESS_INFORMATION));
  BOOL pr;

  ZeroMemory(&si , sizeof(STARTUPINFO)) ;
  si.cb = sizeof(STARTUPINFO) ;
	
  pr=CreateProcess(NULL, command_line, NULL, NULL, TRUE, flags, NULL,  
NULL, &si, pi);

  if (wait && pr)
    WaitForSingleObject(pi->hProcess, (DWORD)(-1L)); // from dospawn.c
//    WaitForInputIdle(pi->hProcess, INFINITE);

	CloseHandle(pi->hThread);
	CloseHandle(pi->hProcess);
  free(pi);

  if (!pr)
	  return 0;

  return 1;
}

With these, is that possible?