Hi,
I want to ensure only the standard handles are inherited.
For Unix this seems to work fine with:
QProcess::UnixProcessParameters params;
params.flags = QProcess::UnixProcessFlag::CloseFileDescriptors;
params.lowestFileDescriptorToClose = 0;
m_process.setUnixProcessParameters(params);
m_process.start(....
For Windows I tried something like:
https://devblogs.microsoft.com/oldnewthing/20111216-00/?p=8873
via: (the UR_ENSURE stuff just checks if return value is sane)
STARTUPINFOEX info;
ZeroMemory(&info, sizeof(info));
m_process.setCreateProcessArgumentsModifier([&info](QProcess::CreateProcessArguments
*args) {
// only keep the handles that we have in args->startupInfo
SIZE_T size = 0;
LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList = NULL;
UR_ENSURE(InitializeProcThreadAttributeList(NULL, 1, 0, &size)
|| (GetLastError() == ERROR_INSUFFICIENT_BUFFER));
UR_ENSURE((lpAttributeList =
reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(HeapAlloc(GetProcessHeap(),
0, size))));
UR_ENSURE(InitializeProcThreadAttributeList(lpAttributeList, 1,
0, &size));
HANDLE handlesToInherit[] = {args->startupInfo->hStdInput,
args->startupInfo->hStdOutput, args->startupInfo->hStdError};
UR_ENSURE(UpdateProcThreadAttribute(lpAttributeList, 0,
PROC_THREAD_ATTRIBUTE_HANDLE_LIST, handlesToInherit,
sizeof(handlesToInherit), NULL, NULL));
info.StartupInfo = *(args->startupInfo);
info.StartupInfo.cb = sizeof(info);
info.lpAttributeList = lpAttributeList;
args->flags |= EXTENDED_STARTUPINFO_PRESENT;
args->startupInfo = &info.StartupInfo;
});
m_process.start(....
But with that I end up without any valid handles that can be used to get
output from the QProcess m_process.
Any pointers how to do that correctly would be very welcome. (or if I
just missed to used the proper Qt API for that)
Greetings
Christoph
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