QPair<QString, KLockFile::Ptr> allocateRepository() {
KLockFile::Ptr lock;
QString repoPath;
KComponentData component("item repositories temp", QByteArray(), KComponentData::SkipMainComponentRegistration);
QString xdgCacheDir = QProcessEnvironment::systemEnvironment().value("XDG_CACHE_HOME", QDir::homePath() + "/.cache") + "/kdevduchain";
QString baseDir = QProcessEnvironment::systemEnvironment().value("KDEV_DUCHAIN_DIR", xdgCacheDir);
KStandardDirs::makeDir(baseDir);
Q_ASSERT( ICore::self() );
Q_ASSERT( ICore::self()->activeSession() );
baseDir += '/' + ICore::self()->activeSession()->id().toString();
//Since each instance of kdevelop needs an own directory, iterate until we find a not-yet-used one
for(int a = 0; a < 100; ++a) {
QString specificDir = baseDir + QString("/%1").arg(a);
KStandardDirs::makeDir(specificDir);
lock = new KLockFile(specificDir + "/lock", component);
KLockFile::LockResult result = lock->lock(KLockFile::NoBlockFlag | KLockFile::ForceFlag);
bool useDir = false;
if(result != KLockFile::LockOK) {
int pid;
QString hostname, appname;
if(lock->getLockInfo(pid, hostname, appname)) {
if(!processExists(pid)) {
kDebug() << "The process holding" << specificDir << "with pid" << pid << "does not exists any more. Re-using the directory.";
QFile::remove(specificDir + "/lock");
useDir = true;
if(lock->lock(KLockFile::NoBlockFlag | KLockFile::ForceFlag) != KLockFile::LockOK) {
kWarning() << "Failed to re-establish the lock in" << specificDir;
continue;
}
}
}
}else {
useDir = true;
}
if(useDir) {
repoPath = specificDir;
if(result == KLockFile::LockStale) {
kWarning() << "stale lock detected:" << specificDir + "/lock";
}
break;
}
}
if(repoPath.isEmpty()) {
kError() << "could not create a directory for the duchain data";
}else{
kDebug() << "picked duchain directory" << repoPath;
}
return qMakePair(repoPath, lock);
}
void KConfigINIBackEnd::sync(bool bMerge)
{
// write-sync is only necessary if there are dirty entries
if(!pConfig->isDirty())
return;
bool bEntriesLeft = true;
// find out the file to write to (most specific writable file)
// try local app-specific file first
if(!mfileName.isEmpty())
{
// Create the containing dir if needed
if((resType != "config") && !QDir::isRelativePath(mLocalFileName))
{
KURL path;
path.setPath(mLocalFileName);
QString dir = path.directory();
KStandardDirs::makeDir(dir);
}
// Can we allow the write? We can, if the program
// doesn't run SUID. But if it runs SUID, we must
// check if the user would be allowed to write if
// it wasn't SUID.
if(checkAccess(mLocalFileName, W_OK))
{
// File is writable
KLockFile::Ptr lf;
bool mergeLocalFile = bMerge;
// Check if the file has been updated since.
if(mergeLocalFile)
{
lf = lockFile(false); // Lock file for local file
if(lf && lf->isLocked())
lf = 0; // Already locked, we don't need to lock/unlock again
if(lf)
{
lf->lock(KLockFile::LockForce);
// But what if the locking failed? Ignore it for now...
}
QFileInfo info(mLocalFileName);
if((d->localLastSize == info.size()) && (d->localLastModified == info.lastModified()))
{
// Not changed, don't merge.
mergeLocalFile = false;
}
else
{
// Changed...
d->localLastModified = QDateTime();
d->localLastSize = 0;
}
}
bEntriesLeft = writeConfigFile(mLocalFileName, false, mergeLocalFile);
// Only if we didn't have to merge anything can we use our in-memory state
// the next time around. Otherwise the config-file may contain entries
// that are different from our in-memory state which means we will have to
// do a merge from then on.
// We do not automatically update the in-memory state with the on-disk
// state when writing the config to disk. We only do so when
// KCOnfig::reparseConfiguration() is called.
// For KDE 4.0 we may wish to reconsider that.
if(!mergeLocalFile)
{
QFileInfo info(mLocalFileName);
d->localLastModified = info.lastModified();
d->localLastSize = info.size();
}
if(lf)
lf->unlock();
}
}
// only write out entries to the kdeglobals file if there are any
// entries marked global (indicated by bEntriesLeft) and
// the useKDEGlobals flag is set.
if(bEntriesLeft && useKDEGlobals)
{
// can we allow the write? (see above)
if(checkAccess(mGlobalFileName, W_OK))
{
KLockFile::Ptr lf = lockFile(true); // Lock file for global file
if(lf && lf->isLocked())
lf = 0; // Already locked, we don't need to lock/unlock again
if(lf)
{
lf->lock(KLockFile::LockForce);
// But what if the locking failed? Ignore it for now...
}
writeConfigFile(mGlobalFileName, true, bMerge); // Always merge
if(lf)
lf->unlock();
}
}
}