+static HashStringList GetExpectedHashesFromFor(metaIndex * const Parser, std::string const &MetaKey)/*{{{*/
+{
+ if (Parser == NULL)
+ return HashStringList();
+ metaIndex::checkSum * const R = Parser->Lookup(MetaKey);
+ if (R == NULL)
+ return HashStringList();
+ return R->Hashes;
+}
+ /*}}}*/
+
+// all ::HashesRequired and ::GetExpectedHashes implementations /*{{{*/
+/* ::GetExpectedHashes is abstract and has to be implemented by all subclasses.
+ It is best to implement it as broadly as possible, while ::HashesRequired defaults
+ to true and should be as restrictive as possible for false cases. Note that if
+ a hash is returned by ::GetExpectedHashes it must match. Only if it doesn't
+ ::HashesRequired is called to evaluate if its okay to have no hashes. */
+APT_CONST bool pkgAcqTransactionItem::HashesRequired() const
+{
+ /* signed repositories obviously have a parser and good hashes.
+ unsigned repositories, too, as even if we can't trust them for security,
+ we can at least trust them for integrity of the download itself.
+ Only repositories without a Release file can (obviously) not have
+ hashes – and they are very uncommon and strongly discouraged */
+ return TransactionManager->MetaIndexParser != NULL &&
+ TransactionManager->MetaIndexParser->GetLoadedSuccessfully() == metaIndex::TRI_YES;
+}
+HashStringList pkgAcqTransactionItem::GetExpectedHashes() const
+{
+ return GetExpectedHashesFor(GetMetaKey());
+}
+
+APT_CONST bool pkgAcqMetaBase::HashesRequired() const
+{
+ // Release and co have no hashes 'by design'.
+ return false;
+}
+HashStringList pkgAcqMetaBase::GetExpectedHashes() const
+{
+ return HashStringList();
+}
+
+APT_CONST bool pkgAcqIndexDiffs::HashesRequired() const
+{
+ /* We can't check hashes of rred result as we don't know what the
+ hash of the file will be. We just know the hash of the patch(es),
+ the hash of the file they will apply on and the hash of the resulting
+ file. */
+ if (State == StateFetchDiff)
+ return true;
+ return false;
+}
+HashStringList pkgAcqIndexDiffs::GetExpectedHashes() const
+{
+ if (State == StateFetchDiff)
+ return available_patches[0].download_hashes;
+ return HashStringList();
+}
+
+APT_CONST bool pkgAcqIndexMergeDiffs::HashesRequired() const
+{
+ /* @see #pkgAcqIndexDiffs::HashesRequired, with the difference that
+ we can check the rred result after all patches are applied as
+ we know the expected result rather than potentially apply more patches */
+ if (State == StateFetchDiff)
+ return true;
+ return State == StateApplyDiff;
+}
+HashStringList pkgAcqIndexMergeDiffs::GetExpectedHashes() const
+{
+ if (State == StateFetchDiff)
+ return patch.download_hashes;
+ else if (State == StateApplyDiff)
+ return GetExpectedHashesFor(Target.MetaKey);
+ return HashStringList();
+}
+
+APT_CONST bool pkgAcqArchive::HashesRequired() const
+{
+ return LocalSource == false;
+}
+HashStringList pkgAcqArchive::GetExpectedHashes() const
+{
+ // figured out while parsing the records
+ return ExpectedHashes;
+}
+
+APT_CONST bool pkgAcqFile::HashesRequired() const
+{
+ // supplied as parameter at creation time, so the caller decides
+ return ExpectedHashes.usable();
+}
+HashStringList pkgAcqFile::GetExpectedHashes() const
+{
+ return ExpectedHashes;
+}
+ /*}}}*/
+// Acquire::Item::QueueURI and specialisations from child classes /*{{{*/
+bool pkgAcquire::Item::QueueURI(pkgAcquire::ItemDesc &Item)
+{
+ Owner->Enqueue(Item);
+ return true;
+}
+/* The idea here is that an item isn't queued if it exists on disk and the
+ transition manager was a hit as this means that the files it contains
+ the checksums for can't be updated either (or they are and we are asking
+ for a hashsum mismatch to happen which helps nobody) */
+bool pkgAcqTransactionItem::QueueURI(pkgAcquire::ItemDesc &Item)
+{
+ if (TransactionManager->State != TransactionStarted)
+ {
+ if (_config->FindB("Debug::Acquire::Transaction", false))
+ std::clog << "Skip " << Target.URI << " as transaction was already dealt with!" << std::endl;
+ return false;
+ }
+ std::string const FinalFile = GetFinalFilename();
+ if (TransactionManager != NULL && TransactionManager->IMSHit == true &&
+ FileExists(FinalFile) == true)
+ {
+ PartialFile = DestFile = FinalFile;
+ Status = StatDone;
+ return false;
+ }
+ return pkgAcquire::Item::QueueURI(Item);
+}
+/* The transition manager InRelease itself (or its older sisters-in-law
+ Release & Release.gpg) is always queued as this allows us to rerun gpgv
+ on it to verify that we aren't stalled with old files */
+bool pkgAcqMetaBase::QueueURI(pkgAcquire::ItemDesc &Item)
+{
+ return pkgAcquire::Item::QueueURI(Item);
+}
+/* the Diff/Index needs to queue also the up-to-date complete index file
+ to ensure that the list cleaner isn't eating it */
+bool pkgAcqDiffIndex::QueueURI(pkgAcquire::ItemDesc &Item)
+{
+ if (pkgAcqTransactionItem::QueueURI(Item) == true)
+ return true;
+ QueueOnIMSHit();
+ return false;
+}
+ /*}}}*/
+// Acquire::Item::GetFinalFilename and specialisations for child classes /*{{{*/
+std::string pkgAcquire::Item::GetFinalFilename() const
+{
+ // Beware: Desc.URI is modified by redirections
+ return GetFinalFileNameFromURI(Desc.URI);
+}
+std::string pkgAcqDiffIndex::GetFinalFilename() const
+{
+ return GetFinalFileNameFromURI(GetDiffIndexURI(Target));
+}
+std::string pkgAcqIndex::GetFinalFilename() const
+{
+ std::string const FinalFile = GetFinalFileNameFromURI(Target.URI);
+ return GetKeepCompressedFileName(FinalFile, Target);
+}
+std::string pkgAcqMetaSig::GetFinalFilename() const
+{
+ return GetFinalFileNameFromURI(Target.URI);
+}
+std::string pkgAcqBaseIndex::GetFinalFilename() const
+{
+ return GetFinalFileNameFromURI(Target.URI);
+}
+std::string pkgAcqMetaBase::GetFinalFilename() const
+{
+ return GetFinalFileNameFromURI(Target.URI);
+}
+std::string pkgAcqArchive::GetFinalFilename() const
+{
+ return _config->FindDir("Dir::Cache::Archives") + flNotDir(StoreFilename);
+}
+ /*}}}*/
+// pkgAcqTransactionItem::GetMetaKey and specialisations for child classes /*{{{*/
+std::string pkgAcqTransactionItem::GetMetaKey() const
+{
+ return Target.MetaKey;
+}
+std::string pkgAcqIndex::GetMetaKey() const
+{
+ if (Stage == STAGE_DECOMPRESS_AND_VERIFY || CurrentCompressionExtension == "uncompressed")
+ return Target.MetaKey;
+ return Target.MetaKey + "." + CurrentCompressionExtension;
+}
+std::string pkgAcqDiffIndex::GetMetaKey() const
+{
+ return GetDiffIndexFileName(Target.MetaKey);
+}
+ /*}}}*/
+//pkgAcqTransactionItem::TransactionState and specialisations for child classes /*{{{*/
+bool pkgAcqTransactionItem::TransactionState(TransactionStates const state)
+{
+ bool const Debug = _config->FindB("Debug::Acquire::Transaction", false);
+ switch(state)
+ {
+ case TransactionStarted: _error->Fatal("Item %s changed to invalid transaction start state!", Target.URI.c_str()); break;
+ case TransactionAbort:
+ if(Debug == true)
+ std::clog << " Cancel: " << DestFile << std::endl;
+ if (Status == pkgAcquire::Item::StatIdle)
+ {
+ Status = pkgAcquire::Item::StatDone;
+ Dequeue();
+ }
+ break;
+ case TransactionCommit:
+ if(PartialFile.empty() == false)
+ {
+ bool sameFile = (PartialFile == DestFile);
+ // we use symlinks on IMS-Hit to avoid copies
+ if (RealFileExists(DestFile))
+ {
+ struct stat Buf;
+ if (lstat(PartialFile.c_str(), &Buf) != -1)
+ {
+ if (S_ISLNK(Buf.st_mode) && Buf.st_size > 0)
+ {
+ char partial[Buf.st_size + 1];
+ ssize_t const sp = readlink(PartialFile.c_str(), partial, Buf.st_size);
+ if (sp == -1)
+ _error->Errno("pkgAcqTransactionItem::TransactionState-sp", _("Failed to readlink %s"), PartialFile.c_str());
+ else
+ {
+ partial[sp] = '\0';
+ sameFile = (DestFile == partial);
+ }
+ }
+ }
+ else
+ _error->Errno("pkgAcqTransactionItem::TransactionState-stat", _("Failed to stat %s"), PartialFile.c_str());
+ }
+ if (sameFile == false)
+ {
+ // ensure that even without lists-cleanup all compressions are nuked
+ std::string FinalFile = GetFinalFileNameFromURI(Target.URI);
+ if (FileExists(FinalFile))
+ {
+ if(Debug == true)
+ std::clog << "rm " << FinalFile << " # " << DescURI() << std::endl;
+ if (RemoveFile("TransactionStates-Cleanup", FinalFile) == false)
+ return false;
+ }
+ for (auto const &ext: APT::Configuration::getCompressorExtensions())
+ {
+ auto const Final = FinalFile + ext;
+ if (FileExists(Final))
+ {
+ if(Debug == true)
+ std::clog << "rm " << Final << " # " << DescURI() << std::endl;
+ if (RemoveFile("TransactionStates-Cleanup", Final) == false)
+ return false;
+ }
+ }
+ if(Debug == true)
+ std::clog << "mv " << PartialFile << " -> "<< DestFile << " # " << DescURI() << std::endl;
+ if (Rename(PartialFile, DestFile) == false)
+ return false;
+ }
+ else if(Debug == true)
+ std::clog << "keep " << PartialFile << " # " << DescURI() << std::endl;
+
+ } else {
+ if(Debug == true)
+ std::clog << "rm " << DestFile << " # " << DescURI() << std::endl;
+ if (RemoveFile("TransItem::TransactionCommit", DestFile) == false)
+ return false;
+ }
+ break;
+ }
+ return true;
+}
+bool pkgAcqMetaBase::TransactionState(TransactionStates const state)
+{
+ // Do not remove InRelease on IMSHit of Release.gpg [yes, this is very edgecasey]
+ if (TransactionManager->IMSHit == false)
+ return pkgAcqTransactionItem::TransactionState(state);
+ return true;
+}
+bool pkgAcqIndex::TransactionState(TransactionStates const state)
+{
+ if (pkgAcqTransactionItem::TransactionState(state) == false)
+ return false;
+
+ switch (state)
+ {
+ case TransactionStarted: _error->Fatal("AcqIndex %s changed to invalid transaction start state!", Target.URI.c_str()); break;
+ case TransactionAbort:
+ if (Stage == STAGE_DECOMPRESS_AND_VERIFY)
+ {
+ // keep the compressed file, but drop the decompressed
+ EraseFileName.clear();
+ if (PartialFile.empty() == false && flExtension(PartialFile) != CurrentCompressionExtension)
+ RemoveFile("TransactionAbort", PartialFile);
+ }
+ break;
+ case TransactionCommit:
+ if (EraseFileName.empty() == false)
+ RemoveFile("AcqIndex::TransactionCommit", EraseFileName);
+ break;
+ }
+ return true;
+}
+bool pkgAcqDiffIndex::TransactionState(TransactionStates const state)
+{
+ if (pkgAcqTransactionItem::TransactionState(state) == false)
+ return false;
+
+ switch (state)
+ {
+ case TransactionStarted: _error->Fatal("Item %s changed to invalid transaction start state!", Target.URI.c_str()); break;
+ case TransactionCommit:
+ break;
+ case TransactionAbort:
+ std::string const Partial = GetPartialFileNameFromURI(Target.URI);
+ RemoveFile("TransactionAbort", Partial);
+ break;
+ }
+
+ return true;
+}
+ /*}}}*/
+
+class APT_HIDDEN NoActionItem : public pkgAcquire::Item /*{{{*/
+/* The sole purpose of this class is having an item which does nothing to
+ reach its done state to prevent cleanup deleting the mentioned file.
+ Handy in cases in which we know we have the file already, like IMS-Hits. */
+{
+ IndexTarget const Target;
+ public:
+ virtual std::string DescURI() const APT_OVERRIDE {return Target.URI;};
+ virtual HashStringList GetExpectedHashes() const APT_OVERRIDE {return HashStringList();};
+
+ NoActionItem(pkgAcquire * const Owner, IndexTarget const &Target) :
+ pkgAcquire::Item(Owner), Target(Target)
+ {
+ Status = StatDone;
+ DestFile = GetFinalFileNameFromURI(Target.URI);
+ }
+ NoActionItem(pkgAcquire * const Owner, IndexTarget const &Target, std::string const &FinalFile) :
+ pkgAcquire::Item(Owner), Target(Target)
+ {
+ Status = StatDone;
+ DestFile = FinalFile;
+ }
+};
+ /*}}}*/
+class APT_HIDDEN CleanupItem : public pkgAcqTransactionItem /*{{{*/
+/* This class ensures that a file which was configured but isn't downloaded
+ for various reasons isn't kept in an old version in the lists directory.
+ In a way its the reverse of NoActionItem as it helps with removing files
+ even if the lists-cleanup is deactivated. */
+{
+ public:
+ virtual std::string DescURI() const APT_OVERRIDE {return Target.URI;};
+ virtual HashStringList GetExpectedHashes() const APT_OVERRIDE {return HashStringList();};
projects / apt.git / blobdiff