QLockFile::LockError QLockFilePrivate::tryLock_sys()
{
// Assemble data, to write in a single call to write
// (otherwise we'd have to check every write call)
// Use operator% from the fast builder to avoid multiple memory allocations.
QByteArray fileData = QByteArray::number(QCoreApplication::applicationPid()) + '\n'
+ qAppName().toUtf8() + '\n'
+ localHostName().toUtf8() + '\n';
const QByteArray lockFileName = QFile::encodeName(fileName);
const int fd = qt_safe_open(lockFileName.constData(), O_WRONLY | O_CREAT | O_EXCL, 0644);
if (fd < 0) {
switch (errno) {
case EEXIST:
return QLockFile::LockFailedError;
case EACCES:
case EROFS:
return QLockFile::PermissionError;
default:
return QLockFile::UnknownError;
}
}
// Ensure nobody else can delete the file while we have it
if (!setNativeLocks(fd))
qWarning() << "setNativeLocks failed:" << strerror(errno);
// We hold the lock, continue.
fileHandle = fd;
QLockFile::LockError error = QLockFile::NoError;
if (qt_write_loop(fd, fileData.constData(), fileData.size()) < fileData.size())
error = QLockFile::UnknownError; // partition full
return error;
}
bool NetworkDevice::init() {
debugAssert(! initialized);
logPrintf("Network Startup");
logPrintf("Starting WinSock networking.\n");
WSADATA wsda;
WSAStartup(MAKEWORD(G3D_WINSOCK_MAJOR_VERSION, G3D_WINSOCK_MINOR_VERSION), &wsda);
std::string hostname = "localhost";
{
char ac[128];
if (gethostname(ac, sizeof(ac)) == -1) {
logPrintf("Warning: Error while getting local host name\n");
} else {
hostname = gethostbyname(ac)->h_name;
}
}
EthernetAdapter a;
a.hostname = hostname;
a.name = "";
a.ip = NetAddress(hostname, 0).ip();
// TODO: Find subnet on Win32
a.subnet = 0x0000FFFF;
// TODO: Find broadcast on Win32
a.broadcast = 0xFFFFFFFF;
// TODO: find MAC on Win32
addAdapter(a);
std::string machine = localHostName();
std::string addr = NetAddress(machine, 0).ipString();
logPrintf(
"Network:\n"
" Status: %s\n"
" Loaded winsock specification version %d (%d is "
"the highest available)\n"
" %d sockets available\n"
" Largest UDP datagram packet size is %d bytes\n\n",
wsda.szDescription,
wsda.szSystemStatus,
wsda.wVersion,
wsda.wHighVersion,
wsda.iMaxSockets,
wsda.iMaxUdpDg);
// TODO: WSAIoctl for subnet and broadcast addresses
// http://msdn.microsoft.com/en-us/library/ms741621(VS.85).aspx
//
// TODO: SIO_GET_INTERFACE_LIST
initialized = true;
return true;
}
QLockFile::LockError QLockFilePrivate::tryLock_sys()
{
const QFileSystemEntry fileEntry(fileName);
// When writing, allow others to read.
// When reading, QFile will allow others to read and write, all good.
// Adding FILE_SHARE_DELETE would allow forceful deletion of stale files,
// but Windows doesn't allow recreating it while this handle is open anyway,
// so this would only create confusion (can't lock, but no lock file to read from).
const DWORD dwShareMode = FILE_SHARE_READ;
#ifndef Q_OS_WINRT
SECURITY_ATTRIBUTES securityAtts = { sizeof(SECURITY_ATTRIBUTES), NULL, FALSE };
HANDLE fh = CreateFile((const wchar_t*)fileEntry.nativeFilePath().utf16(),
GENERIC_WRITE,
dwShareMode,
&securityAtts,
CREATE_NEW, // error if already exists
FILE_ATTRIBUTE_NORMAL,
NULL);
#else // !Q_OS_WINRT
HANDLE fh = CreateFile2((const wchar_t*)fileEntry.nativeFilePath().utf16(),
GENERIC_WRITE,
dwShareMode,
CREATE_NEW, // error if already exists
NULL);
#endif // Q_OS_WINRT
if (fh == INVALID_HANDLE_VALUE) {
const DWORD lastError = GetLastError();
switch (lastError) {
case ERROR_SHARING_VIOLATION:
case ERROR_ALREADY_EXISTS:
case ERROR_FILE_EXISTS:
case ERROR_ACCESS_DENIED: // readonly file, or file still in use by another process. Assume the latter, since we don't create it readonly.
return QLockFile::LockFailedError;
default:
qWarning() << "Got unexpected locking error" << lastError;
return QLockFile::UnknownError;
}
}
// We hold the lock, continue.
fileHandle = fh;
// Assemble data, to write in a single call to write
// (otherwise we'd have to check every write call)
QByteArray fileData;
fileData += QByteArray::number(QCoreApplication::applicationPid());
fileData += '\n';
fileData += qAppName().toUtf8();
fileData += '\n';
fileData += localHostName();
fileData += '\n';
DWORD bytesWritten = 0;
QLockFile::LockError error = QLockFile::NoError;
if (!WriteFile(fh, fileData.constData(), fileData.size(), &bytesWritten, NULL) || !FlushFileBuffers(fh))
error = QLockFile::UnknownError; // partition full
return error;
}
bool QLockFilePrivate::isApparentlyStale() const
{
qint64 pid;
QString hostname, appname;
if (!getLockInfo(&pid, &hostname, &appname))
return false;
if (hostname.isEmpty() || hostname == localHostName()) {
if (::kill(pid, 0) == -1 && errno == ESRCH)
return true; // PID doesn't exist anymore
}
const qint64 age = QFileInfo(fileName).lastModified().secsTo(QDateTime::currentDateTime()) * 1000;
return staleLockTime > 0 && age > staleLockTime;
}
static const QString getCacheFilePath()
{
QFile machineIdFile("/var/lib/dbus/machine-id");
QString machineId;
if (machineIdFile.exists()) {
if (machineIdFile.open(QIODevice::ReadOnly))
machineId = QString::fromLatin1(machineIdFile.readAll().trimmed());
}
if (machineId.isEmpty())
machineId = localHostName();
const QString dirPath = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation);
if (QSysInfo::ByteOrder == QSysInfo::BigEndian)
return dirPath + QLatin1String("/qt_compose_cache_big_endian_") + machineId;
return dirPath + QLatin1String("/qt_compose_cache_little_endian_") + machineId;
}
QLockFile::LockError QLockFilePrivate::tryLock_sys()
{
// Assemble data, to write in a single call to write
// (otherwise we'd have to check every write call)
// Use operator% from the fast builder to avoid multiple memory allocations.
QByteArray fileData = QByteArray::number(QCoreApplication::applicationPid()) % '\n'
% QCoreApplication::applicationName().toUtf8() % '\n'
% localHostName() % '\n';
const QByteArray lockFileName = QFile::encodeName(fileName);
const int fd = qt_safe_open(lockFileName.constData(), O_WRONLY | O_CREAT | O_EXCL, 0644);
if (fd < 0) {
switch (errno) {
case EEXIST:
return QLockFile::LockFailedError;
case EACCES:
case EROFS:
return QLockFile::PermissionError;
default:
return QLockFile::UnknownError;
}
}
// Ensure nobody else can delete the file while we have it
if (!setNativeLocks(fileName, fd)) {
const int errnoSaved = errno;
qWarning() << "setNativeLocks failed:" << qt_error_string(errnoSaved);
}
if (qt_write_loop(fd, fileData.constData(), fileData.size()) < fileData.size()) {
close(fd);
if (!QFile::remove(fileName))
qWarning("QLockFile: Could not remove our own lock file %s.", qPrintable(fileName));
return QLockFile::UnknownError; // partition full
}
// We hold the lock, continue.
fileHandle = fd;
// Sync to disk if possible. Ignore errors (e.g. not supported).
#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
fdatasync(fileHandle);
#else
fsync(fileHandle);
#endif
return QLockFile::NoError;
}
bool QLockFilePrivate::isApparentlyStale() const
{
qint64 pid;
QString hostname, appname;
if (getLockInfo(&pid, &hostname, &appname)) {
if (hostname.isEmpty() || hostname == QString::fromLocal8Bit(localHostName())) {
if (::kill(pid, 0) == -1 && errno == ESRCH)
return true; // PID doesn't exist anymore
const QString processName = processNameByPid(pid);
if (!processName.isEmpty()) {
QFileInfo fi(appname);
if (fi.isSymLink())
fi.setFile(fi.symLinkTarget());
if (processName != fi.fileName())
return true; // PID got reused by a different application.
}
}
}
const qint64 age = QFileInfo(fileName).lastModified().msecsTo(QDateTime::currentDateTime());
return staleLockTime > 0 && age > staleLockTime;
}
bool QLockFilePrivate::isApparentlyStale() const
{
qint64 pid;
QString hostname, appname;
if (!getLockInfo(&pid, &hostname, &appname))
return false;
// On WinRT there seems to be no way of obtaining information about other
// processes due to sandboxing
#ifndef Q_OS_WINRT
if (hostname == QString::fromLocal8Bit(localHostName())) {
HANDLE procHandle = ::OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
if (!procHandle)
return true;
// We got a handle but check if process is still alive
DWORD dwR = ::WaitForSingleObject(procHandle, 0);
::CloseHandle(procHandle);
if (dwR == WAIT_TIMEOUT)
return true;
}
#endif // !Q_OS_WINRT
const qint64 age = QFileInfo(fileName).lastModified().msecsTo(QDateTime::currentDateTime());
return staleLockTime > 0 && age > staleLockTime;
}
bool NetworkDevice::init(G3D::Log* _log) {
debugAssert(!initialized);
debugLog = _log;
#ifdef G3D_WIN32
if (debugLog) {
debugLog->section("Network Startup");
debugLog->println("Starting WinSock networking.\n");
}
WSADATA wsda;
WSAStartup(MAKEWORD(G3D_WINSOCK_MAJOR_VERSION, G3D_WINSOCK_MINOR_VERSION), &wsda);
if (debugLog) {
std::string machine = localHostName();
std::string addr = NetAddress(machine, 0).ipString();
debugLog->printf(
"Network:\n"
" localhost = %s (%s)\n"
" %s\n"
" Status: %s\n"
" Loaded winsock specification version %d (%d is "
"the highest available)\n"
" %d sockets available\n"
" Largest UDP datagram packet size is %d bytes\n\n",
machine.c_str(), addr.c_str(),
wsda.szDescription,
wsda.szSystemStatus,
wsda.wVersion,
wsda.wHighVersion,
wsda.iMaxSockets,
wsda.iMaxUdpDg);
}
#endif
if (debugLog) {debugLog->section("Testing Network");}
SOCKET sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (debugLog) {debugLog->print("Open Socket ");}
if (sock == SOCKET_ERROR) {
if (debugLog) {
debugLog->println("FAIL");
debugLog->println(socketErrorCode());
}
return false;
}
if (debugLog) { debugLog->println("Ok"); }
int TR = true;
int ret = setsockopt(sock, SOL_SOCKET, SO_BROADCAST,
(const char*)&TR, sizeof(TR));
if (debugLog) {debugLog->print("Enable UDP Broadcast ");}
if (ret != 0) {
if (debugLog) {
debugLog->println("FAIL");
debugLog->println(socketErrorCode());
}
return false;
}
if (debugLog) {debugLog->println("Ok");}
if (debugLog) {debugLog->print("Testing UDP Broadcast ");}
SOCKADDR_IN addr;
int32 x;
addr = NetAddress(0xFFFFFFFF, 23).addr;
ret = sendto(sock, (const char*)&x, sizeof(x), 0,
(struct sockaddr *) &addr, sizeof(addr));
if (ret == SOCKET_ERROR) {
if (debugLog) {
debugLog->println("FAIL");
debugLog->println(socketErrorCode());
}
return false;
}
if (debugLog) {debugLog->println("Ok");}
if (debugLog) {debugLog->section("");}
initialized = true;
return true;
}
