cmd commands in ShellExecute

Question

I am trying in execute netsh winsock reset catalog command in command prompt from an elevated(has admin privileage) c++ application.

HINSTANCE retVal = ShellExecute(NULL, "open", "cmd", "\c netsh winsock reset catalog > CUninstall.log", NULL, SW_NORMAL);

It just opens the command prompt and nothing else happens. I have tried

HINSTANCE retVal = ShellExecute(NULL, "runas", "cmd", "\c netsh winsock reset catalog > CUninstall.log", NULL, SW_NORMAL);

and

HINSTANCE retVal = ShellExecute(NULL, "open", "cmd", " netsh winsock reset catalog > CUninstall.log", NULL, SW_NORMAL);

@JonathanPotter: The `"runas"` argument to `ShellExecute` runs the new process with elevated privileges. `CreateProcess` can't do that in any documented way. There is however a lower level COM interface that's used internally by `ShellExecute`. In essense with their inept design and implementation of security, Microsoft, among other idiocies (it was so bad that a great many people *paid* to downgrade from Vista to XP), turned upside down which function is basic and which is a wrapper. — Cheers and hth. - Alf, Jan 25 '18 at 07:55

score 2 · Accepted Answer · answered Jan 25 '18 at 09:34

Switch character was causing the problem. It worked when switch character changed from \c to /c.

Form

HINSTANCE retVal = ShellExecute(NULL, "open", "cmd", "\c netsh winsock reset catalog > CUninstall.log", NULL, SW_NORMAL);

to

HINSTANCE retVal = ShellExecute(NULL, "open", "cmd", "/c netsh winsock reset catalog > CUninstall.log", NULL, SW_NORMAL);

score 1 · Answer 2 · answered Aug 01 '19 at 14:09

It took some trial and error to find the optimal way, so I would like to share my solution. Put aside my recomendation to use Asynchronized calls, here is my DoRun() function:

BOOL DoRun(WCHAR *command)
{
    BOOL Result = FALSE;
    DWORD retSize;
    LPTSTR pTemp = NULL;
    TCHAR Command[BUFSIZE] = L"";
    if (!(DeleteFile(RESULTS_FILE)))
    {
        //return L"Can't delete previous results";
    }
    _tcscpy_s(Command, L"/C ");
    _tcscat_s(Command, command);
    _tcscat_s(Command, L" >");
    _tcscat_s(Command, RESULTS_FILE);
    wprintf(L"Calling:\n%s\n", Command);
    Result = (BOOL) ShellExecute(GetActiveWindow(), L"OPEN", L"cmd", Command, NULL, 0L);
    if(!Result)
    {
        retSize = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
            FORMAT_MESSAGE_FROM_SYSTEM |
            FORMAT_MESSAGE_ARGUMENT_ARRAY,
            NULL,
            GetLastError(),
            LANG_NEUTRAL,
            (LPTSTR)&pTemp,
            0,
            NULL);
        MessageBox(NULL,pTemp,L"Error",MB_OK);
    }
    return Result;
}

user20059141 · Answer 3 · 2022-09-22T07:32:55.110

func runElevated(interName, stateName string, isAdmin bool) {
    /*
        禁用无线网卡：netsh interface set interface WLAN disabled
        启用无线网卡：netsh interface set interface WLAN enabled
        禁用有线网卡：netsh interface set interface 以太网 disabled
        启用有线网卡：netsh interface set interface 以太网 enabled
    */
    var verb string
    if isAdmin {
        verb = "open"
    } else {
        verb = "runas"
    }
    exe := "C:\\Windows\\system32\\cmd.exe" // or "cmd"
    cwd, _ := os.Getwd()
    var cmdList = make([]string, 0)
    var cmdMap = map[string]string{"WLAN": "以太网", "enable": "disable", "以太网": "WLAN", "disable": "enable"}
    cmdList = append(cmdList, fmt.Sprintf("/c netsh interface set interface %s %s", interName, stateName))
    cmdList = append(cmdList, fmt.Sprintf("/c netsh interface set interface %s %s", cmdMap[interName], cmdMap[stateName]))

    verbPtr, _ := syscall.UTF16PtrFromString(verb)
    exePtr, _ := syscall.UTF16PtrFromString(exe)
    cwdPtr, _ := syscall.UTF16PtrFromString(cwd)
    for _, k := range cmdList {
        argPtr, _ := syscall.UTF16PtrFromString(k)
        err := windows.ShellExecute(0, verbPtr, exePtr, argPtr, cwdPtr, windows.SW_HIDE)
        if err != nil {
            log.Fatalf("execute error, detail %s", err)
        }
    }
    log.Fatal("execute success...")
}

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cmd commands in ShellExecute

3 Answers3