Hi all,
Trying to create a method to detect if ANY MSI is running and if so halt
bootstrapper...
I am doing this in C++
I get a successful mutex, but it always returns ERROR_SUCCESS, what am I
doing wrong?
thanks
Steve
HANDLE ghMutex = NULL;
LPCWSTR sczVerifyMSIRunningVariableSet = L"0";
LPWSTR sczVerifyMSIRunningVariable = NULL;
LPWSTR sczUnformattedVerifyMSIRunningVariable = NULL;
LPCWSTR sczMutexName = L"Global\\_MSIExecute";
LPWSTR sczName = NULL;
BOOL MutexExist = FALSE;
// get the bootstrapper variable to change
hr = BalGetStringVariable(WIXSTDBA_VARIABLE_IS_ANOTHER_MSI_RUNNING,
&sczUnformattedVerifyMSIRunningVariable);
BalExitOnFailure1(hr, "Failed to get MSI running variable: %ls",
WIXSTDBA_VARIABLE_IS_ANOTHER_MSI_RUNNING);
hr = BalFormatString(sczUnformattedVerifyMSIRunningVariable,
&sczVerifyMSIRunningVariable);
BalExitOnFailure1(hr, "Failed to format get MSI running variable:
%ls", sczUnformattedVerifyMSIRunningVariable);
hr = StrAllocFormatted(&sczName, L"%ls", sczMutexName);
::MessageBoxW(m_hWnd, (LPCWSTR)sczName,
(LPCWSTR)m_pTheme->sczCaption, MB_OK | MB_ICONWARNING);
// check to see if any MSI is running
ghMutex = ::CreateMutex(
NULL, // default security attributes
FALSE, // initially not owned
sczName); // product name
if (ghMutex != NULL)
{
::MessageBoxW(m_hWnd, L"ghMutex was not null",
(LPCWSTR)m_pTheme->sczCaption, MB_OK | MB_ICONWARNING);
switch (GetLastError())
{
case ERROR_SUCCESS:
// Mutex created successfully. There is no instance
running
::MessageBoxW(m_hWnd, L"ghMutex: Mutex created
successfully. There is no instance running FALSE",
(LPCWSTR)m_pTheme->sczCaption, MB_OK | MB_ICONWARNING);
MutexExist = FALSE;
break;
case ERROR_ALREADY_EXISTS:
// Mutex already exists so there is a running instance
::MessageBoxW(m_hWnd, L"ghMutex: Mutex already exists so
there is a running instance TRUE", (LPCWSTR)m_pTheme->sczCaption, MB_OK |
MB_ICONWARNING);
MutexExist = TRUE;
break;
default:
// Failed to create Mutex by unknown reason
::MessageBoxW(m_hWnd, L"ghMutex: Failed to create Mutex
by unknown reason FALSE", (LPCWSTR)m_pTheme->sczCaption, MB_OK |
MB_ICONWARNING);
MutexExist = FALSE;
break;
}
}
if (MutexExist)
{
sczVerifyMSIRunningVariableSet = L"1";
}
// a MSI is installing
hr =
m_pEngine->SetVariableString(LPCWSTR(sczVerifyMSIRunningVariable),
sczVerifyMSIRunningVariableSet);
--
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http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/seeing-if-a-MSI-is-running-using-mutex-tp7599025.html
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