pkgcachegen.h: Hack around unordered_map not existing before C++11

[apt.git] / apt-pkg / acquire-item.cc

diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc
index 100199bc10689afd2417ddcec7b5e2b90fc3b077..7f31d14492b967a649c0cb5bdd2e1f3dadd18dd3 100644 (file)
--- a/apt-pkg/acquire-item.cc
+++ b/apt-pkg/acquire-item.cc
@@ -22,7 +22,6 @@
 #include <apt-pkg/error.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/fileutl.h>

-#include <apt-pkg/sha1.h>

 #include <apt-pkg/tagfile.h>
 #include <apt-pkg/metaindex.h>
 #include <apt-pkg/acquire.h>
 #include <apt-pkg/tagfile.h>
 #include <apt-pkg/metaindex.h>
 #include <apt-pkg/acquire.h>


@@ -33,6 +32,7 @@
 #include <apt-pkg/pkgrecords.h>
 #include <apt-pkg/gpgv.h>
 
 #include <apt-pkg/pkgrecords.h>
 #include <apt-pkg/gpgv.h>
 

+#include <algorithm>

 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stddef.h>
 #include <stdlib.h>
 #include <string.h>


@@ -42,9 +42,9 @@
 #include <unistd.h>
 #include <errno.h>
 #include <string>
 #include <unistd.h>
 #include <errno.h>
 #include <string>

-#include <sstream>

 #include <stdio.h>
 #include <ctime>
 #include <stdio.h>
 #include <ctime>

+#include <sstream>

 
 #include <apti18n.h>
                                                                        /*}}}*/
 
 #include <apti18n.h>
                                                                        /*}}}*/


@@ -80,18 +80,33 @@ static std::string GetFinalFileNameFromURI(std::string const &uri)  /*{{{*/
    return _config->FindDir("Dir::State::lists") + URItoFileName(uri);
 }
                                                                        /*}}}*/
    return _config->FindDir("Dir::State::lists") + URItoFileName(uri);
 }
                                                                        /*}}}*/

-static std::string GetCompressedFileName(std::string const &URI, std::string const &Name, std::string const &Ext) /*{{{*/
+static std::string GetKeepCompressedFileName(std::string file, IndexTarget const &Target)/*{{{*/
+{
+   if (Target.KeepCompressed == false)
+      return file;
+
+   std::string const CompressionTypes = Target.Option(IndexTarget::COMPRESSIONTYPES);
+   if (CompressionTypes.empty() == false)
+   {
+      std::string const ext = CompressionTypes.substr(0, CompressionTypes.find(' '));
+      if (ext != "uncompressed")
+        file.append(".").append(ext);
+   }
+   return file;
+}
+                                                                       /*}}}*/
+static std::string GetCompressedFileName(IndexTarget const &Target, std::string const &Name, std::string const &Ext) /*{{{*/

 {
    if (Ext.empty() || Ext == "uncompressed")
       return Name;
 
    // do not reverify cdrom sources as apt-cdrom may rewrite the Packages
    // file when its doing the indexcopy
 {
    if (Ext.empty() || Ext == "uncompressed")
       return Name;
 
    // do not reverify cdrom sources as apt-cdrom may rewrite the Packages
    // file when its doing the indexcopy

-   if (URI.substr(0,6) == "cdrom:")
+   if (Target.URI.substr(0,6) == "cdrom:")

       return Name;
 
    // adjust DestFile if its compressed on disk
       return Name;
 
    // adjust DestFile if its compressed on disk

-   if (_config->FindB("Acquire::GzipIndexes",false) == true)
+   if (Target.KeepCompressed == true)

       return Name + '.' + Ext;
    return Name;
 }
       return Name + '.' + Ext;
    return Name;
 }


@@ -108,13 +123,66 @@ static std::string GetDiffsPatchFileName(std::string const &Final)        /*{{{*/
    return Final + ".ed";
 }
                                                                        /*}}}*/
    return Final + ".ed";
 }
                                                                        /*}}}*/

+static bool BootstrapPDiffWith(std::string const &PartialFile, std::string const &FinalFile, IndexTarget const &Target)/*{{{*/
+{
+   // patching needs to be bootstrapped with the 'old' version
+   std::vector<std::string> types = VectorizeString(Target.Option(IndexTarget::COMPRESSIONTYPES), ' ');
+   auto typeItr = types.cbegin();
+   for (; typeItr != types.cend(); ++typeItr)
+   {
+      std::string Final = FinalFile;
+      if (*typeItr != "uncompressed")
+        Final.append(".").append(*typeItr);
+      if (RealFileExists(Final) == false)
+        continue;
+      std::string Partial = PartialFile;
+      if (*typeItr != "uncompressed")
+        Partial.append(".").append(*typeItr);
+      if (FileExists(Partial.c_str()) == true)
+        return true;
+      if (symlink(Final.c_str(), Partial.c_str()) != 0)
+        return false;
+      break;
+   }
+   return typeItr != types.cend();
+}
+                                                                       /*}}}*/

 
 

-static bool AllowInsecureRepositories(metaIndex const * const MetaIndexParser, pkgAcqMetaClearSig * const TransactionManager, pkgAcquire::Item * const I) /*{{{*/
+static bool MessageInsecureRepository(bool const isError, std::string const &msg)/*{{{*/

 {
 {

-   if(MetaIndexParser->GetTrusted() == metaIndex::TRI_YES || _config->FindB("Acquire::AllowInsecureRepositories") == true)
+   if (isError)
+   {
+      _error->Error("%s", msg.c_str());
+      _error->Notice("%s", _("Updating from such a repository can't be done securely, and is therefore disabled by default."));
+   }
+   else
+   {
+      _error->Warning("%s", msg.c_str());
+      _error->Notice("%s", _("Data from such a repository can't be authenticated and is therefore potentially dangerous to use."));
+   }
+   _error->Notice("%s", _("See apt-secure(8) manpage for repository creation and user configuration details."));
+   return false;
+}
+static bool MessageInsecureRepository(bool const isError, char const * const msg, std::string const &repo)
+{
+   std::string m;
+   strprintf(m, msg, repo.c_str());
+   return MessageInsecureRepository(isError, m);
+}
+                                                                       /*}}}*/
+static bool AllowInsecureRepositories(char const * const msg, std::string const &repo,/*{{{*/
+      metaIndex const * const MetaIndexParser, pkgAcqMetaClearSig * const TransactionManager, pkgAcquire::Item * const I)
+{
+   if(MetaIndexParser->GetTrusted() == metaIndex::TRI_YES)
+      return true;
+
+   if (_config->FindB("Acquire::AllowInsecureRepositories") == true)
+   {
+      MessageInsecureRepository(false, msg, repo);

       return true;
       return true;

+   }

 
 

-   _error->Error(_("Use --allow-insecure-repositories to force the update"));
+   MessageInsecureRepository(true, msg, repo);

    TransactionManager->AbortTransaction();
    I->Status = pkgAcquire::Item::StatError;
    return false;
    TransactionManager->AbortTransaction();
    I->Status = pkgAcquire::Item::StatError;
    return false;


@@ -145,7 +213,7 @@ APT_CONST bool pkgAcqTransactionItem::HashesRequired() const
       Only repositories without a Release file can (obviously) not have
       hashes – and they are very uncommon and strongly discouraged */
    return TransactionManager->MetaIndexParser != NULL &&
       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_UNSET;
+      TransactionManager->MetaIndexParser->GetLoadedSuccessfully() == metaIndex::TRI_YES;

 }
 HashStringList pkgAcqTransactionItem::GetExpectedHashes() const
 {
 }
 HashStringList pkgAcqTransactionItem::GetExpectedHashes() const
 {


@@ -269,7 +337,7 @@ std::string pkgAcqDiffIndex::GetFinalFilename() const
 std::string pkgAcqIndex::GetFinalFilename() const
 {
    std::string const FinalFile = GetFinalFileNameFromURI(Target.URI);
 std::string pkgAcqIndex::GetFinalFilename() const
 {
    std::string const FinalFile = GetFinalFileNameFromURI(Target.URI);

-   return GetCompressedFileName(Target.URI, FinalFile, CurrentCompressionExtension);
+   return GetCompressedFileName(Target, FinalFile, CurrentCompressionExtension);

 }
 std::string pkgAcqMetaSig::GetFinalFilename() const
 {
 }
 std::string pkgAcqMetaSig::GetFinalFilename() const
 {


@@ -329,7 +397,7 @@ bool pkgAcqTransactionItem::TransactionState(TransactionStates const state)
         } else {
            if(Debug == true)
               std::clog << "rm " << DestFile << " # " << DescURI() << std::endl;
         } else {
            if(Debug == true)
               std::clog << "rm " << DestFile << " # " << DescURI() << std::endl;

-           unlink(DestFile.c_str());
+           RemoveFile("TransactionCommit", DestFile);

         }
         break;
    }
         }
         break;
    }


@@ -355,12 +423,12 @@ bool pkgAcqIndex::TransactionState(TransactionStates const state)
            // keep the compressed file, but drop the decompressed
            EraseFileName.clear();
            if (PartialFile.empty() == false && flExtension(PartialFile) == "decomp")
            // keep the compressed file, but drop the decompressed
            EraseFileName.clear();
            if (PartialFile.empty() == false && flExtension(PartialFile) == "decomp")

-              unlink(PartialFile.c_str());
+              RemoveFile("TransactionAbort", PartialFile);

         }
         break;
       case TransactionCommit:
         if (EraseFileName.empty() == false)
         }
         break;
       case TransactionCommit:
         if (EraseFileName.empty() == false)

-           unlink(EraseFileName.c_str());
+           RemoveFile("TransactionCommit", EraseFileName);

         break;
    }
    return true;
         break;
    }
    return true;


@@ -376,7 +444,7 @@ bool pkgAcqDiffIndex::TransactionState(TransactionStates const state)
         break;
       case TransactionAbort:
         std::string const Partial = GetPartialFileNameFromURI(Target.URI);
         break;
       case TransactionAbort:
         std::string const Partial = GetPartialFileNameFromURI(Target.URI);

-        unlink(Partial.c_str());
+        RemoveFile("TransactionAbort", Partial);

         break;
    }
 
         break;
    }
 


@@ -391,8 +459,8 @@ class APT_HIDDEN NoActionItem : public pkgAcquire::Item                     /*{{{*/
 {
    IndexTarget const Target;
    public:
 {
    IndexTarget const Target;
    public:

-   virtual std::string DescURI() const {return Target.URI;};
-   virtual HashStringList GetExpectedHashes()  const {return HashStringList();};
+   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)
 
    NoActionItem(pkgAcquire * const Owner, IndexTarget const &Target) :
       pkgAcquire::Item(Owner), Target(Target)


@@ -400,6 +468,12 @@ class APT_HIDDEN NoActionItem : public pkgAcquire::Item                    /*{{{*/
       Status = StatDone;
       DestFile = GetFinalFileNameFromURI(Target.URI);
    }
       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;
+   }

 };
                                                                        /*}}}*/
 
 };
                                                                        /*}}}*/
 


@@ -457,7 +531,6 @@ void pkgAcquire::Item::Failed(string const &Message,pkgAcquire::MethodConfig con
 {
    if(ErrorText.empty())
       ErrorText = LookupTag(Message,"Message");
 {
    if(ErrorText.empty())
       ErrorText = LookupTag(Message,"Message");

-   UsedMirror =  LookupTag(Message,"UsedMirror");

    if (QueueCounter <= 1)
    {
       /* This indicates that the file is not available right now but might
    if (QueueCounter <= 1)
    {
       /* This indicates that the file is not available right now but might


@@ -515,12 +588,28 @@ void pkgAcquire::Item::Start(string const &/*Message*/, unsigned long long const
       FileSize = Size;
 }
                                                                        /*}}}*/
       FileSize = Size;
 }
                                                                        /*}}}*/

+// Acquire::Item::VerifyDone - check if Item was downloaded OK         /*{{{*/
+/* Note that hash-verification is 'hardcoded' in acquire-worker and has
+ * already passed if this method is called. */
+bool pkgAcquire::Item::VerifyDone(std::string const &Message,
+        pkgAcquire::MethodConfig const * const /*Cnf*/)
+{
+   std::string const FileName = LookupTag(Message,"Filename");
+   if (FileName.empty() == true)
+   {
+      Status = StatError;
+      ErrorText = "Method gave a blank filename";
+      return false;
+   }
+
+   return true;
+}
+                                                                       /*}}}*/

 // Acquire::Item::Done - Item downloaded OK                            /*{{{*/
 // Acquire::Item::Done - Item downloaded OK                            /*{{{*/

-void pkgAcquire::Item::Done(string const &Message, HashStringList const &Hashes,
+void pkgAcquire::Item::Done(string const &/*Message*/, HashStringList const &Hashes,

                            pkgAcquire::MethodConfig const * const /*Cnf*/)
 {
    // We just downloaded something..
                            pkgAcquire::MethodConfig const * const /*Cnf*/)
 {
    // We just downloaded something..

-   UsedMirror = LookupTag(Message,"UsedMirror");

    if (FileSize == 0)
    {
       unsigned long long const downloadedSize = Hashes.FileSize();
    if (FileSize == 0)
    {
       unsigned long long const downloadedSize = Hashes.FileSize();


@@ -587,8 +676,8 @@ bool pkgAcquire::Item::RenameOnError(pkgAcquire::Item::RenameOnErrorState const
         Status = StatError;
         break;
       case NotClearsigned:
         Status = StatError;
         break;
       case NotClearsigned:

-        errtext = _("Does not start with a cleartext signature");
-        Status = StatError;
+        strprintf(errtext, _("Clearsigned file isn't valid, got '%s' (does the network require authentication?)"), "NOSPLIT");
+        Status = StatAuthError;

         break;
       case MaximumSizeExceeded:
         // the method is expected to report a good error for this
         break;
       case MaximumSizeExceeded:
         // the method is expected to report a good error for this


@@ -775,7 +864,7 @@ bool pkgAcqMetaBase::CheckStopAuthentication(pkgAcquire::Item * const I, const s
       _error->Warning(_("An error occurred during the signature "
                         "verification. The repository is not updated "
                         "and the previous index files will be used. "
       _error->Warning(_("An error occurred during the signature "
                         "verification. The repository is not updated "
                         "and the previous index files will be used. "

-                        "GPG error: %s: %s\n"),
+                        "GPG error: %s: %s"),

                       Desc.Description.c_str(),
                       LookupTag(Message,"Message").c_str());
       RunScripts("APT::Update::Auth-Failure");
                       Desc.Description.c_str(),
                       LookupTag(Message,"Message").c_str());
       RunScripts("APT::Update::Auth-Failure");


@@ -785,7 +874,7 @@ bool pkgAcqMetaBase::CheckStopAuthentication(pkgAcquire::Item * const I, const s
       _error->Error(_("GPG error: %s: %s"),
                     Desc.Description.c_str(),
                     LookupTag(Message,"Message").c_str());
       _error->Error(_("GPG error: %s: %s"),
                     Desc.Description.c_str(),
                     LookupTag(Message,"Message").c_str());

-      I->Status = StatError;
+      I->Status = StatAuthError;

       return true;
    } else {
       _error->Warning(_("GPG error: %s: %s"),
       return true;
    } else {
       _error->Warning(_("GPG error: %s: %s"),


@@ -808,7 +897,6 @@ string pkgAcqMetaBase::Custom600Headers() const
    Header += MaximumSize;
 
    string const FinalFile = GetFinalFilename();
    Header += MaximumSize;
 
    string const FinalFile = GetFinalFilename();

-

    struct stat Buf;
    if (stat(FinalFile.c_str(),&Buf) == 0)
       Header += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
    struct stat Buf;
    if (stat(FinalFile.c_str(),&Buf) == 0)
       Header += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);


@@ -832,14 +920,7 @@ bool pkgAcqMetaBase::CheckDownloadDone(pkgAcqTransactionItem * const I, const st
    // We have just finished downloading a Release file (it is not
    // verified yet)
 
    // We have just finished downloading a Release file (it is not
    // verified yet)
 

-   string const FileName = LookupTag(Message,"Filename");
-   if (FileName.empty() == true)
-   {
-      I->Status = StatError;
-      I->ErrorText = "Method gave a blank filename";
-      return false;
-   }
-
+   std::string const FileName = LookupTag(Message,"Filename");

    if (FileName != I->DestFile && RealFileExists(I->DestFile) == false)
    {
       I->Local = true;
    if (FileName != I->DestFile && RealFileExists(I->DestFile) == false)
    {
       I->Local = true;


@@ -857,7 +938,7 @@ bool pkgAcqMetaBase::CheckDownloadDone(pkgAcqTransactionItem * const I, const st
       if (RealFileExists(FinalFile) && Hashes.VerifyFile(FinalFile) == true)
       {
         IMSHit = true;
       if (RealFileExists(FinalFile) && Hashes.VerifyFile(FinalFile) == true)
       {
         IMSHit = true;

-        unlink(I->DestFile.c_str());
+        RemoveFile("CheckDownloadDone", I->DestFile);

       }
    }
 
       }
    }
 


@@ -947,11 +1028,25 @@ void pkgAcqMetaBase::QueueIndexes(bool const verify)                     /*{{{*/
    // at this point the real Items are loaded in the fetcher
    ExpectedAdditionalItems = 0;
 
    // at this point the real Items are loaded in the fetcher
    ExpectedAdditionalItems = 0;
 

-   for (std::vector <IndexTarget>::const_iterator Target = IndexTargets.begin();
+  bool metaBaseSupportsByHash = false;
+  if (TransactionManager != NULL && TransactionManager->MetaIndexParser != NULL)
+     metaBaseSupportsByHash = TransactionManager->MetaIndexParser->GetSupportsAcquireByHash();
+
+   for (std::vector <IndexTarget>::iterator Target = IndexTargets.begin();

         Target != IndexTargets.end();
         ++Target)
    {
         Target != IndexTargets.end();
         ++Target)
    {

-      bool trypdiff = _config->FindB("Acquire::PDiffs", true);
+      // all is an implementation detail. Users shouldn't use this as arch
+      // We need this support trickery here as e.g. Debian has binary-all files already,
+      // but arch:all packages are still in the arch:any files, so we would waste precious
+      // download time, bandwidth and diskspace for nothing, BUT Debian doesn't feature all
+      // in the set of supported architectures, so we can filter based on this property rather
+      // than invent an entirely new flag we would need to carry for all of eternity.
+      if (Target->Option(IndexTarget::ARCHITECTURE) == "all" &&
+           TransactionManager->MetaIndexParser->IsArchitectureSupported("all") == false)
+        continue;
+
+      bool trypdiff = Target->OptionBool(IndexTarget::PDIFFS);

       if (verify == true)
       {
         if (TransactionManager->MetaIndexParser->Exists(Target->MetaKey) == false)
       if (verify == true)
       {
         if (TransactionManager->MetaIndexParser->Exists(Target->MetaKey) == false)


@@ -960,33 +1055,127 @@ void pkgAcqMetaBase::QueueIndexes(bool const verify)                    /*{{{*/
            if (Target->IsOptional)
               continue;
 
            if (Target->IsOptional)
               continue;
 

+           std::string const &arch = Target->Option(IndexTarget::ARCHITECTURE);
+           if (arch.empty() == false)
+           {
+              if (TransactionManager->MetaIndexParser->IsArchitectureSupported(arch) == false)
+              {
+                 _error->Notice(_("Skipping acquire of configured file '%s' as repository '%s' doesn't support architecture '%s'"),
+                       Target->MetaKey.c_str(), TransactionManager->Target.Description.c_str(), arch.c_str());
+                 continue;
+              }
+              // if the architecture is officially supported but currently no packages for it available,
+              // ignore silently as this is pretty much the same as just shipping an empty file.
+              // if we don't know which architectures are supported, we do NOT ignore it to notify user about this
+              if (TransactionManager->MetaIndexParser->IsArchitectureSupported("*undefined*") == false)
+                 continue;
+           }
+

            Status = StatAuthError;
            strprintf(ErrorText, _("Unable to find expected entry '%s' in Release file (Wrong sources.list entry or malformed file)"), Target->MetaKey.c_str());
            return;
         }
            Status = StatAuthError;
            strprintf(ErrorText, _("Unable to find expected entry '%s' in Release file (Wrong sources.list entry or malformed file)"), Target->MetaKey.c_str());
            return;
         }

+        else
+        {
+           auto const hashes = GetExpectedHashesFor(Target->MetaKey);
+           if (hashes.usable() == false && hashes.empty() == false)
+           {
+              _error->Warning(_("Skipping acquire of configured file '%s' as repository '%s' provides only weak security information for it"),
+                       Target->MetaKey.c_str(), TransactionManager->Target.Description.c_str());
+              continue;
+           }
+        }

 
 

-        if (RealFileExists(GetFinalFileNameFromURI(Target->URI)))
+        // autoselect the compression method
+        std::vector<std::string> types = VectorizeString(Target->Option(IndexTarget::COMPRESSIONTYPES), ' ');
+        types.erase(std::remove_if(types.begin(), types.end(), [&](std::string const &t) {
+           if (t == "uncompressed")
+              return TransactionManager->MetaIndexParser->Exists(Target->MetaKey) == false;
+           std::string const MetaKey = Target->MetaKey + "." + t;
+           return TransactionManager->MetaIndexParser->Exists(MetaKey) == false;
+        }), types.end());
+        if (types.empty() == false)

         {
         {

-           if (TransactionManager->LastMetaIndexParser != NULL)
+           std::ostringstream os;
+           // add the special compressiontype byhash first if supported
+           std::string const useByHashConf = Target->Option(IndexTarget::BY_HASH);
+           bool useByHash = false;
+           if(useByHashConf == "force")
+              useByHash = true;
+           else
+              useByHash = StringToBool(useByHashConf) == true && metaBaseSupportsByHash;
+           if (useByHash == true)
+              os << "by-hash ";
+           std::copy(types.begin(), types.end()-1, std::ostream_iterator<std::string>(os, " "));
+           os << *types.rbegin();
+           Target->Options["COMPRESSIONTYPES"] = os.str();
+        }
+        else
+           Target->Options["COMPRESSIONTYPES"].clear();
+
+        std::string filename = GetFinalFileNameFromURI(Target->URI);
+        if (RealFileExists(filename) == false)
+        {
+           if (Target->KeepCompressed)

            {
            {

+              filename = GetKeepCompressedFileName(filename, *Target);
+              if (RealFileExists(filename) == false)
+                 filename.clear();
+           }
+           else
+              filename.clear();
+        }
+
+        if (filename.empty() == false)
+        {
+           // if the Release file is a hit and we have an index it must be the current one
+           if (TransactionManager->IMSHit == true)
+              ;
+           else if (TransactionManager->LastMetaIndexParser != NULL)
+           {
+              // see if the file changed since the last Release file
+              // we use the uncompressed files as we might compress differently compared to the server,
+              // so the hashes might not match, even if they contain the same data.

               HashStringList const newFile = GetExpectedHashesFromFor(TransactionManager->MetaIndexParser, Target->MetaKey);
               HashStringList const oldFile = GetExpectedHashesFromFor(TransactionManager->LastMetaIndexParser, Target->MetaKey);
               HashStringList const newFile = GetExpectedHashesFromFor(TransactionManager->MetaIndexParser, Target->MetaKey);
               HashStringList const oldFile = GetExpectedHashesFromFor(TransactionManager->LastMetaIndexParser, Target->MetaKey);

-              if (newFile == oldFile)
-              {
-                 // we have the file already, no point in trying to acquire it again
-                 new NoActionItem(Owner, *Target);
-                 continue;
-              }
+              if (newFile != oldFile)
+                 filename.clear();

            }
            }

+           else
+              filename.clear();

         }
         else
            trypdiff = false; // no file to patch
 
         }
         else
            trypdiff = false; // no file to patch
 

+        if (filename.empty() == false)
+        {
+           new NoActionItem(Owner, *Target, filename);
+           std::string const idxfilename = GetFinalFileNameFromURI(Target->URI + ".diff/Index");
+           if (FileExists(idxfilename))
+              new NoActionItem(Owner, *Target, idxfilename);
+           continue;
+        }
+

         // check if we have patches available
         trypdiff &= TransactionManager->MetaIndexParser->Exists(Target->MetaKey + ".diff/Index");
       }
         // check if we have patches available
         trypdiff &= TransactionManager->MetaIndexParser->Exists(Target->MetaKey + ".diff/Index");
       }

-      // if we have no file to patch, no point in trying
-      trypdiff &= RealFileExists(GetFinalFileNameFromURI(Target->URI));
+      else
+      {
+        // if we have no file to patch, no point in trying
+        std::string filename = GetFinalFileNameFromURI(Target->URI);
+        if (RealFileExists(filename) == false)
+        {
+           if (Target->KeepCompressed)
+           {
+              filename = GetKeepCompressedFileName(filename, *Target);
+              if (RealFileExists(filename) == false)
+                 filename.clear();
+           }
+           else
+              filename.clear();
+        }
+        trypdiff &= (filename.empty() == false);
+      }

 
       // no point in patching from local sources
       if (trypdiff)
 
       // no point in patching from local sources
       if (trypdiff)


@@ -1041,8 +1230,8 @@ bool pkgAcqMetaBase::VerifyVendor(string const &Message)          /*{{{*/
       Transformed = "";
    }
 
       Transformed = "";
    }
 

-   if (_config->FindB("Acquire::Check-Valid-Until", true) == true &&
-       TransactionManager->MetaIndexParser->GetValidUntil() > 0) {
+   if (TransactionManager->MetaIndexParser->GetValidUntil() > 0)
+   {

       time_t const invalid_since = time(NULL) - TransactionManager->MetaIndexParser->GetValidUntil();
       if (invalid_since > 0)
       {
       time_t const invalid_since = time(NULL) - TransactionManager->MetaIndexParser->GetValidUntil();
       if (invalid_since > 0)
       {


@@ -1066,7 +1255,7 @@ bool pkgAcqMetaBase::VerifyVendor(string const &Message)          /*{{{*/
         TransactionManager->LastMetaIndexParser->GetDate() > TransactionManager->MetaIndexParser->GetDate())
    {
       TransactionManager->IMSHit = true;
         TransactionManager->LastMetaIndexParser->GetDate() > TransactionManager->MetaIndexParser->GetDate())
    {
       TransactionManager->IMSHit = true;

-      unlink(DestFile.c_str());
+      RemoveFile("VerifyVendor", DestFile);

       PartialFile = DestFile = GetFinalFilename();
       // load the 'old' file in the 'new' one instead of flipping pointers as
       // the new one isn't owned by us, while the old one is so cleanup would be confused.
       PartialFile = DestFile = GetFinalFilename();
       // load the 'old' file in the 'new' one instead of flipping pointers as
       // the new one isn't owned by us, while the old one is so cleanup would be confused.


@@ -1132,9 +1321,24 @@ string pkgAcqMetaClearSig::Custom600Headers() const
 {
    string Header = pkgAcqMetaBase::Custom600Headers();
    Header += "\nFail-Ignore: true";
 {
    string Header = pkgAcqMetaBase::Custom600Headers();
    Header += "\nFail-Ignore: true";

+   std::string const key = TransactionManager->MetaIndexParser->GetSignedBy();
+   if (key.empty() == false)
+      Header += "\nSigned-By: " + key;
+

    return Header;
 }
                                                                        /*}}}*/
    return Header;
 }
                                                                        /*}}}*/

+bool pkgAcqMetaClearSig::VerifyDone(std::string const &Message,                /*{{{*/
+        pkgAcquire::MethodConfig const * const Cnf)
+{
+   Item::VerifyDone(Message, Cnf);
+
+   if (FileExists(DestFile) && !StartsWithGPGClearTextSignature(DestFile))
+      return RenameOnError(NotClearsigned);
+
+   return true;
+}
+                                                                       /*}}}*/

 // pkgAcqMetaClearSig::Done - We got a file                            /*{{{*/
 void pkgAcqMetaClearSig::Done(std::string const &Message,
                               HashStringList const &Hashes,
 // pkgAcqMetaClearSig::Done - We got a file                            /*{{{*/
 void pkgAcqMetaClearSig::Done(std::string const &Message,
                               HashStringList const &Hashes,


@@ -1142,17 +1346,6 @@ void pkgAcqMetaClearSig::Done(std::string const &Message,
 {
    Item::Done(Message, Hashes, Cnf);
 
 {
    Item::Done(Message, Hashes, Cnf);
 

-   // if we expect a ClearTextSignature (InRelease), ensure that
-   // this is what we get and if not fail to queue a 
-   // Release/Release.gpg, see #346386
-   if (FileExists(DestFile) && !StartsWithGPGClearTextSignature(DestFile))
-   {
-      pkgAcquire::Item::Failed(Message, Cnf);
-      RenameOnError(NotClearsigned);
-      TransactionManager->AbortTransaction();
-      return;
-   }
-

    if(AuthPass == false)
    {
       if(CheckDownloadDone(this, Message, Hashes) == true)
    if(AuthPass == false)
    {
       if(CheckDownloadDone(this, Message, Hashes) == true)


@@ -1183,6 +1376,16 @@ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig c
 
    if (AuthPass == false)
    {
 
    if (AuthPass == false)
    {

+      if (Status == StatAuthError || Status == StatTransientNetworkError)
+      {
+        // if we expected a ClearTextSignature (InRelease) but got a network
+        // error or got a file, but it wasn't valid, we end up here (see VerifyDone).
+        // As these is usually called by web-portals we do not try Release/Release.gpg
+        // as this is gonna fail anyway and instead abort our try (LP#346386)
+        TransactionManager->AbortTransaction();
+        return;
+      }
+

       // Queue the 'old' InRelease file for removal if we try Release.gpg
       // as otherwise the file will stay around and gives a false-auth
       // impression (CVE-2012-0214)
       // Queue the 'old' InRelease file for removal if we try Release.gpg
       // as otherwise the file will stay around and gives a false-auth
       // impression (CVE-2012-0214)


@@ -1196,14 +1399,10 @@ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig c
       if(CheckStopAuthentication(this, Message))
          return;
 
       if(CheckStopAuthentication(this, Message))
          return;
 

-      _error->Warning(_("The data from '%s' is not signed. Packages "
-                        "from that repository can not be authenticated."),
-                      ClearsignedTarget.Description.c_str());
-

       // No Release file was present, or verification failed, so fall
       // back to queueing Packages files without verification
       // No Release file was present, or verification failed, so fall
       // back to queueing Packages files without verification

-      // only allow going further if the users explicitely wants it
-      if(AllowInsecureRepositories(TransactionManager->MetaIndexParser, TransactionManager, this) == true)
+      // only allow going further if the user explicitly wants it
+      if(AllowInsecureRepositories(_("The repository '%s' is not signed."), ClearsignedTarget.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true)

       {
         Status = StatDone;
 
       {
         Status = StatDone;
 


@@ -1298,14 +1497,10 @@ void pkgAcqMetaIndex::Failed(string const &Message,
    pkgAcquire::Item::Failed(Message, Cnf);
    Status = StatDone;
 
    pkgAcquire::Item::Failed(Message, Cnf);
    Status = StatDone;
 

-   _error->Warning(_("The repository '%s' does not have a Release file. "
-                     "This is deprecated, please contact the owner of the "
-                     "repository."), Target.Description.c_str());
-

    // No Release file was present so fall
    // back to queueing Packages files without verification
    // No Release file was present so fall
    // back to queueing Packages files without verification

-   // only allow going further if the users explicitely wants it
-   if(AllowInsecureRepositories(TransactionManager->MetaIndexParser, TransactionManager, this) == true)
+   // only allow going further if the user explicitly wants it
+   if(AllowInsecureRepositories(_("The repository '%s' does not have a Release file."), Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true)

    {
       // ensure old Release files are removed
       TransactionManager->TransactionStageRemoval(this, GetFinalFilename());
    {
       // ensure old Release files are removed
       TransactionManager->TransactionStageRemoval(this, GetFinalFilename());


@@ -1343,7 +1538,7 @@ pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire * const Owner,
    // remove any partial downloaded sig-file in partial/.
    // it may confuse proxies and is too small to warrant a
    // partial download anyway
    // remove any partial downloaded sig-file in partial/.
    // it may confuse proxies and is too small to warrant a
    // partial download anyway

-   unlink(DestFile.c_str());
+   RemoveFile("pkgAcqMetaSig", DestFile);

 
    // set the TransactionManager
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)
 
    // set the TransactionManager
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)


@@ -1372,6 +1567,16 @@ pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire * const Owner,
                                                                        /*}}}*/
 pkgAcqMetaSig::~pkgAcqMetaSig()                                                /*{{{*/
 {
                                                                        /*}}}*/
 pkgAcqMetaSig::~pkgAcqMetaSig()                                                /*{{{*/
 {

+}
+                                                                       /*}}}*/
+// pkgAcqMetaSig::Custom600Headers - Insert custom request headers     /*{{{*/
+std::string pkgAcqMetaSig::Custom600Headers() const
+{
+   std::string Header = pkgAcqTransactionItem::Custom600Headers();
+   std::string const key = TransactionManager->MetaIndexParser->GetSignedBy();
+   if (key.empty() == false)
+      Header += "\nSigned-By: " + key;
+   return Header;

 }
                                                                        /*}}}*/
 // AcqMetaSig::Done - The signature was downloaded/verified            /*{{{*/
 }
                                                                        /*}}}*/
 // AcqMetaSig::Done - The signature was downloaded/verified            /*{{{*/


@@ -1433,7 +1638,7 @@ void pkgAcqMetaSig::Failed(string const &Message,pkgAcquire::MethodConfig const
                            "given to override it."));
          Status = StatDone;
       } else {
                            "given to override it."));
          Status = StatDone;
       } else {

-         _error->Error("%s", downgrade_msg.c_str());
+        MessageInsecureRepository(true, downgrade_msg);

         if (TransactionManager->IMSHit == false)
            Rename(MetaIndex->DestFile, MetaIndex->DestFile + ".FAILED");
         Item::Failed("Message: " + downgrade_msg, Cnf);
         if (TransactionManager->IMSHit == false)
            Rename(MetaIndex->DestFile, MetaIndex->DestFile + ".FAILED");
         Item::Failed("Message: " + downgrade_msg, Cnf);


@@ -1441,16 +1646,12 @@ void pkgAcqMetaSig::Failed(string const &Message,pkgAcquire::MethodConfig const
          return;
       }
    }
          return;
       }
    }

-   else
-      _error->Warning(_("The data from '%s' is not signed. Packages "
-              "from that repository can not be authenticated."),
-           MetaIndex->Target.Description.c_str());

 
    // ensures that a Release.gpg file in the lists/ is removed by the transaction
    TransactionManager->TransactionStageRemoval(this, DestFile);
 
 
    // ensures that a Release.gpg file in the lists/ is removed by the transaction
    TransactionManager->TransactionStageRemoval(this, DestFile);
 

-   // only allow going further if the users explicitely wants it
-   if(AllowInsecureRepositories(TransactionManager->MetaIndexParser, TransactionManager, this) == true)
+   // only allow going further if the user explicitly wants it
+   if (AllowInsecureRepositories(_("The repository '%s' is not signed."), MetaIndex->Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true)

    {
       if (RealFileExists(FinalReleasegpg) || RealFileExists(FinalInRelease))
       {
    {
       if (RealFileExists(FinalReleasegpg) || RealFileExists(FinalInRelease))
       {


@@ -1478,10 +1679,11 @@ void pkgAcqMetaSig::Failed(string const &Message,pkgAcquire::MethodConfig const
 
       // we parse the indexes here because at this point the user wanted
       // a repository that may potentially harm him
 
       // we parse the indexes here because at this point the user wanted
       // a repository that may potentially harm him

-      if (TransactionManager->MetaIndexParser->Load(MetaIndex->DestFile, &ErrorText) == false || MetaIndex->VerifyVendor(Message) == false)
+      bool const GoodLoad = TransactionManager->MetaIndexParser->Load(MetaIndex->DestFile, &ErrorText);
+      if (MetaIndex->VerifyVendor(Message) == false)

         /* expired Release files are still a problem you need extra force for */;
       else
         /* expired Release files are still a problem you need extra force for */;
       else

-        MetaIndex->QueueIndexes(true);
+        MetaIndex->QueueIndexes(GoodLoad);

 
       TransactionManager->TransactionStageCopy(MetaIndex, MetaIndex->DestFile, MetaIndex->GetFinalFilename());
    }
 
       TransactionManager->TransactionStageCopy(MetaIndex, MetaIndex->DestFile, MetaIndex->GetFinalFilename());
    }


@@ -1539,6 +1741,9 @@ pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire * const Owner,
 /* The only header we use is the last-modified header. */
 string pkgAcqDiffIndex::Custom600Headers() const
 {
 /* The only header we use is the last-modified header. */
 string pkgAcqDiffIndex::Custom600Headers() const
 {

+   if (TransactionManager->LastMetaIndexParser != NULL)
+      return "\nIndex-File: true";
+

    string const Final = GetFinalFilename();
 
    if(Debug)
    string const Final = GetFinalFilename();
 
    if(Debug)


@@ -1568,7 +1773,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/
 
    FileFd Fd(IndexDiffFile,FileFd::ReadOnly);
    pkgTagFile TF(&Fd);
 
    FileFd Fd(IndexDiffFile,FileFd::ReadOnly);
    pkgTagFile TF(&Fd);

-   if (_error->PendingError() == true)
+   if (Fd.IsOpen() == false || Fd.Failed())

       return false;
 
    pkgTagSection Tags;
       return false;
 
    pkgTagSection Tags;


@@ -1623,7 +1828,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/
       LocalHashes = GetExpectedHashesFromFor(TransactionManager->LastMetaIndexParser, Target.MetaKey);
    if (LocalHashes.usable() == false)
    {
       LocalHashes = GetExpectedHashesFromFor(TransactionManager->LastMetaIndexParser, Target.MetaKey);
    if (LocalHashes.usable() == false)
    {

-      FileFd fd(CurrentPackagesFile, FileFd::ReadOnly);
+      FileFd fd(CurrentPackagesFile, FileFd::ReadOnly, FileFd::Auto);

       Hashes LocalHashesCalc(ServerHashes);
       LocalHashesCalc.AddFD(fd);
       LocalHashes = LocalHashesCalc.GetHashStringList();
       Hashes LocalHashesCalc(ServerHashes);
       LocalHashesCalc.AddFD(fd);
       LocalHashes = LocalHashesCalc.GetHashStringList();


@@ -1642,10 +1847,18 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile)       /*{{{*/
       std::clog << "Server-Current: " << ServerHashes.find(NULL)->toStr() << " and we start at "
         << CurrentPackagesFile << " " << LocalHashes.FileSize() << " " << LocalHashes.find(NULL)->toStr() << std::endl;
 
       std::clog << "Server-Current: " << ServerHashes.find(NULL)->toStr() << " and we start at "
         << CurrentPackagesFile << " " << LocalHashes.FileSize() << " " << LocalHashes.find(NULL)->toStr() << std::endl;
 

+   // historically, older hashes have more info than newer ones, so start
+   // collecting with older ones first to avoid implementing complicated
+   // information merging techniques… a failure is after all always
+   // recoverable with a complete file and hashes aren't changed that often.
+   std::vector<char const *> types;
+   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+      types.push_back(*type);
+

    // parse all of (provided) history
    vector<DiffInfo> available_patches;
    bool firstAcceptedHashes = true;
    // parse all of (provided) history
    vector<DiffInfo> available_patches;
    bool firstAcceptedHashes = true;

-   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+   for (auto type = types.crbegin(); type != types.crend(); ++type)

    {
       if (LocalHashes.find(*type) == NULL)
         continue;
    {
       if (LocalHashes.find(*type) == NULL)
         continue;


@@ -1703,7 +1916,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/
       return false;
    }
 
       return false;
    }
 

-   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+   for (auto type = types.crbegin(); type != types.crend(); ++type)

    {
       if (LocalHashes.find(*type) == NULL)
         continue;
    {
       if (LocalHashes.find(*type) == NULL)
         continue;


@@ -1743,7 +1956,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/
       }
    }
 
       }
    }
 

-   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+   for (auto type = types.crbegin(); type != types.crend(); ++type)

    {
       std::string tagname = *type;
       tagname.append("-Download");
    {
       std::string tagname = *type;
       tagname.append("-Download");


@@ -1926,7 +2139,7 @@ pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire * const Owner,
    : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL),
      available_patches(diffs)
 {
    : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL),
      available_patches(diffs)
 {

-   DestFile = GetPartialFileNameFromURI(Target.URI);
+   DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target);

 
    Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
 
 
    Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
 


@@ -1937,20 +2150,15 @@ pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire * const Owner,
    if(available_patches.empty() == true)
    {
       // we are done (yeah!), check hashes against the final file
    if(available_patches.empty() == true)
    {
       // we are done (yeah!), check hashes against the final file

-      DestFile = GetFinalFileNameFromURI(Target.URI);
+      DestFile = GetKeepCompressedFileName(GetFinalFileNameFromURI(Target.URI), Target);

       Finish(true);
    }
    else
    {
       Finish(true);
    }
    else
    {

-      // patching needs to be bootstrapped with the 'old' version
-      std::string const PartialFile = GetPartialFileNameFromURI(Target.URI);
-      if (RealFileExists(PartialFile) == false)
+      if (BootstrapPDiffWith(GetPartialFileNameFromURI(Target.URI), GetFinalFilename(), Target) == false)

       {
       {

-        if (symlink(GetFinalFilename().c_str(), PartialFile.c_str()) != 0)
-        {
-           Failed("Link creation of " + PartialFile + " to " + GetFinalFilename() + " failed", NULL);
-           return;
-        }
+        Failed("Bootstrapping of " + DestFile + " failed", NULL);
+        return;

       }
 
       // get the next diff
       }
 
       // get the next diff


@@ -1964,10 +2172,10 @@ void pkgAcqIndexDiffs::Failed(string const &Message,pkgAcquire::MethodConfig con
    Item::Failed(Message,Cnf);
    Status = StatDone;
 
    Item::Failed(Message,Cnf);
    Status = StatDone;
 

+   DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target);

    if(Debug)
       std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << " with " << Message << std::endl
    if(Debug)
       std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << " with " << Message << std::endl

-               << "Falling back to normal index file acquire" << std::endl;
-   DestFile = GetPartialFileNameFromURI(Target.URI);
+               << "Falling back to normal index file acquire " << std::endl;

    RenameOnError(PDiffError);
    std::string const patchname = GetDiffsPatchFileName(DestFile);
    if (RealFileExists(patchname))
    RenameOnError(PDiffError);
    std::string const patchname = GetDiffsPatchFileName(DestFile);
    if (RealFileExists(patchname))


@@ -1988,7 +2196,14 @@ void pkgAcqIndexDiffs::Finish(bool allDone)
    // the file will be cleaned
    if(allDone)
    {
    // the file will be cleaned
    if(allDone)
    {

-      TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename());
+      std::string Final = GetFinalFilename();
+      if (Target.KeepCompressed)
+      {
+        std::string const ext = flExtension(DestFile);
+        if (ext.empty() == false)
+           Final.append(".").append(ext);
+      }
+      TransactionManager->TransactionStageCopy(this, DestFile, Final);

 
       // this is for the "real" finish
       Complete = true;
 
       // this is for the "real" finish
       Complete = true;


@@ -1998,6 +2213,8 @@ void pkgAcqIndexDiffs::Finish(bool allDone)
         std::clog << "\n\nallDone: " << DestFile << "\n" << std::endl;
       return;
    }
         std::clog << "\n\nallDone: " << DestFile << "\n" << std::endl;
       return;
    }

+   else
+      DestFile.clear();

 
    if(Debug)
       std::clog << "Finishing: " << Desc.URI << std::endl;
 
    if(Debug)
       std::clog << "Finishing: " << Desc.URI << std::endl;


@@ -2010,15 +2227,14 @@ void pkgAcqIndexDiffs::Finish(bool allDone)
 bool pkgAcqIndexDiffs::QueueNextDiff()                                 /*{{{*/
 {
    // calc sha1 of the just patched file
 bool pkgAcqIndexDiffs::QueueNextDiff()                                 /*{{{*/
 {
    // calc sha1 of the just patched file

-   std::string const FinalFile = GetPartialFileNameFromURI(Target.URI);
-
+   std::string const FinalFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target);

    if(!FileExists(FinalFile))
    {
       Failed("Message: No FinalFile " + FinalFile + " available", NULL);
       return false;
    }
 
    if(!FileExists(FinalFile))
    {
       Failed("Message: No FinalFile " + FinalFile + " available", NULL);
       return false;
    }
 

-   FileFd fd(FinalFile, FileFd::ReadOnly);
+   FileFd fd(FinalFile, FileFd::ReadOnly, FileFd::Extension);

    Hashes LocalHashesCalc;
    LocalHashesCalc.AddFD(fd);
    HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList();
    Hashes LocalHashesCalc;
    LocalHashesCalc.AddFD(fd);
    HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList();


@@ -2043,14 +2259,10 @@ bool pkgAcqIndexDiffs::QueueNextDiff()                                  /*{{{*/
 
    // remove all patches until the next matching patch is found
    // this requires the Index file to be ordered
 
    // remove all patches until the next matching patch is found
    // this requires the Index file to be ordered

-   for(vector<DiffInfo>::iterator I = available_patches.begin();
-       available_patches.empty() == false &&
-         I != available_patches.end() &&
-         I->result_hashes != LocalHashes;
-       ++I)
-   {
-      available_patches.erase(I);
-   }
+   available_patches.erase(available_patches.begin(),
+        std::find_if(available_patches.begin(), available_patches.end(), [&](DiffInfo const &I) {
+           return I.result_hashes == LocalHashes;
+           }));

 
    // error checking and falling back if no patch was found
    if(available_patches.empty() == true)
 
    // error checking and falling back if no patch was found
    if(available_patches.empty() == true)


@@ -2062,7 +2274,7 @@ bool pkgAcqIndexDiffs::QueueNextDiff()                                    /*{{{*/
    // queue the right diff
    Desc.URI = Target.URI + ".diff/" + available_patches[0].file + ".gz";
    Desc.Description = Description + " " + available_patches[0].file + string(".pdiff");
    // queue the right diff
    Desc.URI = Target.URI + ".diff/" + available_patches[0].file + ".gz";
    Desc.Description = Description + " " + available_patches[0].file + string(".pdiff");

-   DestFile = GetPartialFileNameFromURI(Target.URI + ".diff/" + available_patches[0].file);
+   DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI + ".diff/" + available_patches[0].file), Target);

 
    if(Debug)
       std::clog << "pkgAcqIndexDiffs::QueueNextDiff(): " << Desc.URI << std::endl;
 
    if(Debug)
       std::clog << "pkgAcqIndexDiffs::QueueNextDiff(): " << Desc.URI << std::endl;


@@ -2080,7 +2292,7 @@ void pkgAcqIndexDiffs::Done(string const &Message, HashStringList const &Hashes,
 
    Item::Done(Message, Hashes, Cnf);
 
 
    Item::Done(Message, Hashes, Cnf);
 

-   std::string const FinalFile = GetPartialFileNameFromURI(Target.URI);
+   std::string const FinalFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target);

    std::string const PatchFile = GetDiffsPatchFileName(FinalFile);
 
    // success in downloading a diff, enter ApplyDiff state
    std::string const PatchFile = GetDiffsPatchFileName(FinalFile);
 
    // success in downloading a diff, enter ApplyDiff state


@@ -2104,7 +2316,7 @@ void pkgAcqIndexDiffs::Done(string const &Message, HashStringList const &Hashes,
    {
       // remove the just applied patch
       available_patches.erase(available_patches.begin());
    {
       // remove the just applied patch
       available_patches.erase(available_patches.begin());

-      unlink(PatchFile.c_str());
+      RemoveFile("pkgAcqIndexDiffs::Done", PatchFile);

 
       // move into place
       if(Debug)
 
       // move into place
       if(Debug)


@@ -2159,7 +2371,7 @@ pkgAcqIndexMergeDiffs::pkgAcqIndexMergeDiffs(pkgAcquire * const Owner,
    Desc.URI = Target.URI + ".diff/" + patch.file + ".gz";
    Desc.Description = Description + " " + patch.file + string(".pdiff");
 
    Desc.URI = Target.URI + ".diff/" + patch.file + ".gz";
    Desc.Description = Description + " " + patch.file + string(".pdiff");
 

-   DestFile = GetPartialFileNameFromURI(Target.URI + ".diff/" + patch.file);
+   DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI + ".diff/" + patch.file), Target);

 
    if(Debug)
       std::clog << "pkgAcqIndexMergeDiffs: " << Desc.URI << std::endl;
 
    if(Debug)
       std::clog << "pkgAcqIndexMergeDiffs: " << Desc.URI << std::endl;


@@ -2186,12 +2398,13 @@ void pkgAcqIndexMergeDiffs::Failed(string const &Message,pkgAcquire::MethodConfi
    State = StateErrorDiff;
    if (Debug)
       std::clog << "Falling back to normal index file acquire" << std::endl;
    State = StateErrorDiff;
    if (Debug)
       std::clog << "Falling back to normal index file acquire" << std::endl;

-   DestFile = GetPartialFileNameFromURI(Target.URI);
+   DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target);

    RenameOnError(PDiffError);
    std::string const patchname = GetMergeDiffsPatchFileName(DestFile, patch.file);
    if (RealFileExists(patchname))
       rename(patchname.c_str(), std::string(patchname + ".FAILED").c_str());
    new pkgAcqIndex(Owner, TransactionManager, Target);
    RenameOnError(PDiffError);
    std::string const patchname = GetMergeDiffsPatchFileName(DestFile, patch.file);
    if (RealFileExists(patchname))
       rename(patchname.c_str(), std::string(patchname + ".FAILED").c_str());
    new pkgAcqIndex(Owner, TransactionManager, Target);

+   DestFile.clear();

 }
                                                                        /*}}}*/
 void pkgAcqIndexMergeDiffs::Done(string const &Message, HashStringList const &Hashes,  /*{{{*/
 }
                                                                        /*}}}*/
 void pkgAcqIndexMergeDiffs::Done(string const &Message, HashStringList const &Hashes,  /*{{{*/


@@ -2202,7 +2415,8 @@ void pkgAcqIndexMergeDiffs::Done(string const &Message, HashStringList const &Ha
 
    Item::Done(Message, Hashes, Cnf);
 
 
    Item::Done(Message, Hashes, Cnf);
 

-   string const FinalFile = GetPartialFileNameFromURI(Target.URI);
+   std::string const UncompressedFinalFile = GetPartialFileNameFromURI(Target.URI);
+   std::string const FinalFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target);

    if (State == StateFetchDiff)
    {
       Rename(DestFile, GetMergeDiffsPatchFileName(FinalFile, patch.file));
    if (State == StateFetchDiff)
    {
       Rename(DestFile, GetMergeDiffsPatchFileName(FinalFile, patch.file));


@@ -2221,10 +2435,9 @@ void pkgAcqIndexMergeDiffs::Done(string const &Message, HashStringList const &Ha
       // this is the last completed diff, so we are ready to apply now
       State = StateApplyDiff;
 
       // this is the last completed diff, so we are ready to apply now
       State = StateApplyDiff;
 

-      // patching needs to be bootstrapped with the 'old' version
-      if (symlink(GetFinalFilename().c_str(), FinalFile.c_str()) != 0)
+      if (BootstrapPDiffWith(UncompressedFinalFile, GetFinalFilename(), Target) == false)

       {
       {

-        Failed("Link creation of " + FinalFile + " to " + GetFinalFilename() + " failed", NULL);
+        Failed("Bootstrapping of " + DestFile + " failed", NULL);

         return;
       }
 
         return;
       }
 


@@ -2241,7 +2454,7 @@ void pkgAcqIndexMergeDiffs::Done(string const &Message, HashStringList const &Ha
    else if (State == StateApplyDiff)
    {
       // move the result into place
    else if (State == StateApplyDiff)
    {
       // move the result into place

-      std::string const Final = GetFinalFilename();
+      std::string const Final = GetKeepCompressedFileName(GetFinalFilename(), Target);

       if(Debug)
         std::clog << "Queue patched file in place: " << std::endl
                   << DestFile << " -> " << Final << std::endl;
       if(Debug)
         std::clog << "Queue patched file in place: " << std::endl
                   << DestFile << " -> " << Final << std::endl;


@@ -2253,11 +2466,11 @@ void pkgAcqIndexMergeDiffs::Done(string const &Message, HashStringList const &Ha
       for (std::vector<pkgAcqIndexMergeDiffs *>::const_iterator I = allPatches->begin();
            I != allPatches->end(); ++I)
       {
       for (std::vector<pkgAcqIndexMergeDiffs *>::const_iterator I = allPatches->begin();
            I != allPatches->end(); ++I)
       {

-        std::string const PartialFile = GetPartialFileNameFromURI(Target.URI);
+        std::string const PartialFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target);

         std::string const patch = GetMergeDiffsPatchFileName(PartialFile, (*I)->patch.file);
         std::string const patch = GetMergeDiffsPatchFileName(PartialFile, (*I)->patch.file);

-        unlink(patch.c_str());
+        RemoveFile("pkgAcqIndexMergeDiffs::Done", patch);

       }
       }

-      unlink(FinalFile.c_str());
+      RemoveFile("pkgAcqIndexMergeDiffs::Done", FinalFile);

 
       // all set and done
       Complete = true;
 
       // all set and done
       Complete = true;


@@ -2290,10 +2503,9 @@ pkgAcqIndexMergeDiffs::~pkgAcqIndexMergeDiffs() {}
 pkgAcqIndex::pkgAcqIndex(pkgAcquire * const Owner,
                          pkgAcqMetaClearSig * const TransactionManager,
                          IndexTarget const &Target)
 pkgAcqIndex::pkgAcqIndex(pkgAcquire * const Owner,
                          pkgAcqMetaClearSig * const TransactionManager,
                          IndexTarget const &Target)

-   : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), Stage(STAGE_DOWNLOAD)
+   : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), Stage(STAGE_DOWNLOAD),
+   CompressionExtensions(Target.Option(IndexTarget::COMPRESSIONTYPES))

 {
 {

-   // autoselect the compression method
-   AutoSelectCompression();

    Init(Target.URI, Target.Description, Target.ShortDesc);
 
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)
    Init(Target.URI, Target.Description, Target.ShortDesc);
 
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)


@@ -2301,54 +2513,58 @@ pkgAcqIndex::pkgAcqIndex(pkgAcquire * const Owner,
                 << TransactionManager << std::endl;
 }
                                                                        /*}}}*/
                 << TransactionManager << std::endl;
 }
                                                                        /*}}}*/

-// AcqIndex::AutoSelectCompression - Select compression                        /*{{{*/
-void pkgAcqIndex::AutoSelectCompression()
+// AcqIndex::Init - defered Constructor                                        /*{{{*/
+static void NextCompressionExtension(std::string &CurrentCompressionExtension, std::string &CompressionExtensions, bool const preview)

 {
 {

-   std::vector<std::string> types = APT::Configuration::getCompressionTypes();
-   CompressionExtensions = "";
-   if (TransactionManager->MetaIndexParser != NULL && TransactionManager->MetaIndexParser->Exists(Target.MetaKey))
+   size_t const nextExt = CompressionExtensions.find(' ');
+   if (nextExt == std::string::npos)

    {
    {

-      for (std::vector<std::string>::const_iterator t = types.begin();
-           t != types.end(); ++t)
-      {
-         std::string CompressedMetaKey = string(Target.MetaKey).append(".").append(*t);
-         if (*t == "uncompressed" ||
-             TransactionManager->MetaIndexParser->Exists(CompressedMetaKey) == true)
-            CompressionExtensions.append(*t).append(" ");
-      }
+      CurrentCompressionExtension = CompressionExtensions;
+      if (preview == false)
+        CompressionExtensions.clear();

    }
    else
    {
    }
    else
    {

-      for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t)
-        CompressionExtensions.append(*t).append(" ");
+      CurrentCompressionExtension = CompressionExtensions.substr(0, nextExt);
+      if (preview == false)
+        CompressionExtensions = CompressionExtensions.substr(nextExt+1);

    }
    }

-   if (CompressionExtensions.empty() == false)
-      CompressionExtensions.erase(CompressionExtensions.end()-1);

 }
 }

-                                                                       /*}}}*/
-// AcqIndex::Init - defered Constructor                                        /*{{{*/

 void pkgAcqIndex::Init(string const &URI, string const &URIDesc,
                        string const &ShortDesc)
 {
    Stage = STAGE_DOWNLOAD;
 
    DestFile = GetPartialFileNameFromURI(URI);
 void pkgAcqIndex::Init(string const &URI, string const &URIDesc,
                        string const &ShortDesc)
 {
    Stage = STAGE_DOWNLOAD;
 
    DestFile = GetPartialFileNameFromURI(URI);

+   NextCompressionExtension(CurrentCompressionExtension, CompressionExtensions, false);

 
 

-   size_t const nextExt = CompressionExtensions.find(' ');
-   if (nextExt == std::string::npos)
+   if (CurrentCompressionExtension == "uncompressed")

    {
    {

-      CurrentCompressionExtension = CompressionExtensions;
-      CompressionExtensions.clear();
+      Desc.URI = URI;

    }
    }

-   else
+   else if (CurrentCompressionExtension == "by-hash")

    {
    {

-      CurrentCompressionExtension = CompressionExtensions.substr(0, nextExt);
-      CompressionExtensions = CompressionExtensions.substr(nextExt+1);
-   }
+      NextCompressionExtension(CurrentCompressionExtension, CompressionExtensions, true);
+      if(unlikely(TransactionManager->MetaIndexParser == NULL || CurrentCompressionExtension.empty()))
+        return;
+      if (CurrentCompressionExtension != "uncompressed")
+      {
+        Desc.URI = URI + '.' + CurrentCompressionExtension;
+        DestFile = DestFile + '.' + CurrentCompressionExtension;
+      }

 
 

-   if (CurrentCompressionExtension == "uncompressed")
-   {
-      Desc.URI = URI;
+      HashStringList const Hashes = GetExpectedHashes();
+      HashString const * const TargetHash = Hashes.find(NULL);
+      if (unlikely(TargetHash == nullptr))
+        return;
+      std::string const ByHash = "/by-hash/" + TargetHash->HashType() + "/" + TargetHash->HashValue();
+      size_t const trailing_slash = Desc.URI.find_last_of("/");
+      if (unlikely(trailing_slash == std::string::npos))
+        return;
+      Desc.URI = Desc.URI.replace(
+           trailing_slash,
+           Desc.URI.substr(trailing_slash+1).size()+1,
+           ByHash);

    }
    else if (unlikely(CurrentCompressionExtension.empty()))
       return;
    }
    else if (unlikely(CurrentCompressionExtension.empty()))
       return;


@@ -2358,8 +2574,6 @@ void pkgAcqIndex::Init(string const &URI, string const &URIDesc,
       DestFile = DestFile + '.' + CurrentCompressionExtension;
    }
 
       DestFile = DestFile + '.' + CurrentCompressionExtension;
    }
 

-   if(TransactionManager->MetaIndexParser != NULL)
-      InitByHashIfNeeded();

 
    Desc.Description = URIDesc;
    Desc.Owner = this;
 
    Desc.Description = URIDesc;
    Desc.Owner = this;


@@ -2368,47 +2582,22 @@ void pkgAcqIndex::Init(string const &URI, string const &URIDesc,
    QueueURI(Desc);
 }
                                                                        /*}}}*/
    QueueURI(Desc);
 }
                                                                        /*}}}*/

-// AcqIndex::AdjustForByHash - modify URI for by-hash support          /*{{{*/
-void pkgAcqIndex::InitByHashIfNeeded()
-{
-   // TODO:
-   //  - (maybe?) add support for by-hash into the sources.list as flag
-   //  - make apt-ftparchive generate the hashes (and expire?)
-   std::string HostKnob = "APT::Acquire::" + ::URI(Desc.URI).Host + "::By-Hash";
-   if(_config->FindB("APT::Acquire::By-Hash", false) == true ||
-      _config->FindB(HostKnob, false) == true ||
-      TransactionManager->MetaIndexParser->GetSupportsAcquireByHash())
-   {
-      HashStringList const Hashes = GetExpectedHashes();
-      if(Hashes.usable())
-      {
-         // FIXME: should we really use the best hash here? or a fixed one?
-         HashString const * const TargetHash = Hashes.find("");
-         std::string const ByHash = "/by-hash/" + TargetHash->HashType() + "/" + TargetHash->HashValue();
-         size_t const trailing_slash = Desc.URI.find_last_of("/");
-         Desc.URI = Desc.URI.replace(
-            trailing_slash,
-            Desc.URI.substr(trailing_slash+1).size()+1,
-            ByHash);
-      } else {
-         _error->Warning(
-            "Fetching ByHash requested but can not find record for %s",
-            GetMetaKey().c_str());
-      }
-   }
-}
-                                                                       /*}}}*/

 // AcqIndex::Custom600Headers - Insert custom request headers          /*{{{*/
 // ---------------------------------------------------------------------
 /* The only header we use is the last-modified header. */
 string pkgAcqIndex::Custom600Headers() const
 {
 // AcqIndex::Custom600Headers - Insert custom request headers          /*{{{*/
 // ---------------------------------------------------------------------
 /* The only header we use is the last-modified header. */
 string pkgAcqIndex::Custom600Headers() const
 {

-   string Final = GetFinalFilename();

 
    string msg = "\nIndex-File: true";
 
    string msg = "\nIndex-File: true";

-   struct stat Buf;
-   if (stat(Final.c_str(),&Buf) == 0)
-      msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
+
+   if (TransactionManager->LastMetaIndexParser == NULL)
+   {
+      std::string const Final = GetFinalFilename();
+
+      struct stat Buf;
+      if (stat(Final.c_str(),&Buf) == 0)
+        msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
+   }

 
    if(Target.IsOptional)
       msg += "\nFail-Ignore: true";
 
    if(Target.IsOptional)
       msg += "\nFail-Ignore: true";


@@ -2443,7 +2632,7 @@ void pkgAcqIndex::ReverifyAfterIMS()
 {
    // update destfile to *not* include the compression extension when doing
    // a reverify (as its uncompressed on disk already)
 {
    // update destfile to *not* include the compression extension when doing
    // a reverify (as its uncompressed on disk already)

-   DestFile = GetCompressedFileName(Target.URI, GetPartialFileNameFromURI(Target.URI), CurrentCompressionExtension);
+   DestFile = GetCompressedFileName(Target, GetPartialFileNameFromURI(Target.URI), CurrentCompressionExtension);

 
    // copy FinalFile into partial/ so that we check the hash again
    string FinalFile = GetFinalFilename();
 
    // copy FinalFile into partial/ so that we check the hash again
    string FinalFile = GetFinalFilename();


@@ -2483,7 +2672,7 @@ void pkgAcqIndex::StageDownloadDone(string const &Message, HashStringList const
    Complete = true;
 
    // Handle the unzipd case
    Complete = true;
 
    // Handle the unzipd case

-   string FileName = LookupTag(Message,"Alt-Filename");
+   std::string FileName = LookupTag(Message,"Alt-Filename");

    if (FileName.empty() == false)
    {
       Stage = STAGE_DECOMPRESS_AND_VERIFY;
    if (FileName.empty() == false)
    {
       Stage = STAGE_DECOMPRESS_AND_VERIFY;


@@ -2494,18 +2683,23 @@ void pkgAcqIndex::StageDownloadDone(string const &Message, HashStringList const
       SetActiveSubprocess("copy");
       return;
    }
       SetActiveSubprocess("copy");
       return;
    }

-

    FileName = LookupTag(Message,"Filename");
    FileName = LookupTag(Message,"Filename");

-   if (FileName.empty() == true)
-   {
-      Status = StatError;
-      ErrorText = "Method gave a blank filename";
-   }

 
    // Methods like e.g. "file:" will give us a (compressed) FileName that is
    // not the "DestFile" we set, in this case we uncompress from the local file
    if (FileName != DestFile && RealFileExists(DestFile) == false)
 
    // Methods like e.g. "file:" will give us a (compressed) FileName that is
    // not the "DestFile" we set, in this case we uncompress from the local file
    if (FileName != DestFile && RealFileExists(DestFile) == false)

+   {

       Local = true;
       Local = true;

+      if (Target.KeepCompressed == true)
+      {
+        // but if we don't keep the uncompress we copy the compressed file first
+        Stage = STAGE_DOWNLOAD;
+        Desc.URI = "copy:" + FileName;
+        QueueURI(Desc);
+        SetActiveSubprocess("copy");
+        return;
+      }
+   }

    else
       EraseFileName = FileName;
 
    else
       EraseFileName = FileName;
 


@@ -2519,18 +2713,6 @@ void pkgAcqIndex::StageDownloadDone(string const &Message, HashStringList const
       return;
    }
 
       return;
    }
 

-   // If we have compressed indexes enabled, queue for hash verification
-   if (_config->FindB("Acquire::GzipIndexes",false))
-   {
-      DestFile = GetPartialFileNameFromURI(Target.URI + '.' + CurrentCompressionExtension);
-      EraseFileName = "";
-      Stage = STAGE_DECOMPRESS_AND_VERIFY;
-      Desc.URI = "copy:" + FileName;
-      QueueURI(Desc);
-      SetActiveSubprocess("copy");
-      return;
-    }
-

    // get the binary name for your used compression type
    string decompProg;
    if(CurrentCompressionExtension == "uncompressed")
    // get the binary name for your used compression type
    string decompProg;
    if(CurrentCompressionExtension == "uncompressed")


@@ -2543,9 +2725,16 @@ void pkgAcqIndex::StageDownloadDone(string const &Message, HashStringList const
       return;
    }
 
       return;
    }
 

+   if (Target.KeepCompressed == true)
+   {
+      DestFile = "/dev/null";
+      EraseFileName.clear();
+   }
+   else
+      DestFile += ".decomp";
+

    // queue uri for the next stage
    Stage = STAGE_DECOMPRESS_AND_VERIFY;
    // queue uri for the next stage
    Stage = STAGE_DECOMPRESS_AND_VERIFY;

-   DestFile += ".decomp";

    Desc.URI = decompProg + ":" + FileName;
    QueueURI(Desc);
    SetActiveSubprocess(decompProg);
    Desc.URI = decompProg + ":" + FileName;
    QueueURI(Desc);
    SetActiveSubprocess(decompProg);


@@ -2556,6 +2745,9 @@ void pkgAcqIndex::StageDecompressDone(string const &,
                                       HashStringList const &,
                                       pkgAcquire::MethodConfig const * const)
 {
                                       HashStringList const &,
                                       pkgAcquire::MethodConfig const * const)
 {

+   if (Target.KeepCompressed == true && DestFile == "/dev/null")
+      DestFile = GetPartialFileNameFromURI(Target.URI + '.' + CurrentCompressionExtension);
+

    // Done, queue for rename on transaction finished
    TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename());
    return;
    // Done, queue for rename on transaction finished
    TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename());
    return;


@@ -2710,7 +2902,7 @@ bool pkgAcqArchive::QueueNext()
         
         /* Hmm, we have a file and its size does not match, this means it is
            an old style mismatched arch */
         
         /* Hmm, we have a file and its size does not match, this means it is
            an old style mismatched arch */

-        unlink(FinalFile.c_str());
+        RemoveFile("pkgAcqArchive::QueueNext", FinalFile);

       }
 
       // Check it again using the new style output filenames
       }
 
       // Check it again using the new style output filenames


@@ -2729,7 +2921,7 @@ bool pkgAcqArchive::QueueNext()
         
         /* Hmm, we have a file and its size does not match, this shouldn't
            happen.. */
         
         /* Hmm, we have a file and its size does not match, this shouldn't
            happen.. */

-        unlink(FinalFile.c_str());
+        RemoveFile("pkgAcqArchive::QueueNext", FinalFile);

       }
 
       DestFile = _config->FindDir("Dir::Cache::Archives") + "partial/" + flNotDir(StoreFilename);
       }
 
       DestFile = _config->FindDir("Dir::Cache::Archives") + "partial/" + flNotDir(StoreFilename);


@@ -2739,7 +2931,7 @@ bool pkgAcqArchive::QueueNext()
       {
         // Hmm, the partial file is too big, erase it
         if ((unsigned long long)Buf.st_size > Version->Size)
       {
         // Hmm, the partial file is too big, erase it
         if ((unsigned long long)Buf.st_size > Version->Size)

-           unlink(DestFile.c_str());
+           RemoveFile("pkgAcqArchive::QueueNext", DestFile);

         else
            PartialSize = Buf.st_size;
       }
         else
            PartialSize = Buf.st_size;
       }


@@ -2774,15 +2966,7 @@ void pkgAcqArchive::Done(string const &Message, HashStringList const &Hashes,
    Item::Done(Message, Hashes, Cfg);
 
    // Grab the output filename
    Item::Done(Message, Hashes, Cfg);
 
    // Grab the output filename

-   string FileName = LookupTag(Message,"Filename");
-   if (FileName.empty() == true)
-   {
-      Status = StatError;
-      ErrorText = "Method gave a blank filename";
-      return;
-   }
-
-   // Reference filename
+   std::string const FileName = LookupTag(Message,"Filename");

    if (DestFile !=  FileName && RealFileExists(DestFile) == false)
    {
       StoreFilename = DestFile = FileName;
    if (DestFile !=  FileName && RealFileExists(DestFile) == false)
    {
       StoreFilename = DestFile = FileName;


@@ -2904,7 +3088,8 @@ void pkgAcqChangelog::Init(std::string const &DestDir, std::string const &DestFi
 
    if (DestDir.empty())
    {
 
    if (DestDir.empty())
    {

-      std::string const systemTemp = GetTempDir();
+      std::string const SandboxUser = _config->Find("APT::Sandbox::User");
+      std::string const systemTemp = GetTempDir(SandboxUser);

       char tmpname[100];
       snprintf(tmpname, sizeof(tmpname), "%s/apt-changelog-XXXXXX", systemTemp.c_str());
       if (NULL == mkdtemp(tmpname))
       char tmpname[100];
       snprintf(tmpname, sizeof(tmpname), "%s/apt-changelog-XXXXXX", systemTemp.c_str());
       if (NULL == mkdtemp(tmpname))


@@ -2914,6 +3099,9 @@ void pkgAcqChangelog::Init(std::string const &DestDir, std::string const &DestFi
         return;
       }
       DestFile = TemporaryDirectory = tmpname;
         return;
       }
       DestFile = TemporaryDirectory = tmpname;

+
+      ChangeOwnerAndPermissionOfFile("Item::QueueURI", DestFile.c_str(),
+                                     SandboxUser.c_str(), "root", 0700);

    }
    else
       DestFile = DestDir;
    }
    else
       DestFile = DestDir;


@@ -3008,7 +3196,7 @@ std::string pkgAcqChangelog::URI(std::string const &Template,
         char const * const Component, char const * const SrcName,
         char const * const SrcVersion)
 {
         char const * const Component, char const * const SrcName,
         char const * const SrcVersion)
 {

-   if (Template.find("CHANGEPATH") == std::string::npos)
+   if (Template.find("@CHANGEPATH@") == std::string::npos)

       return "";
 
    // the path is: COMPONENT/SRC/SRCNAME/SRCNAME_SRCVER, e.g. main/a/apt/1.1 or contrib/liba/libapt/2.0
       return "";
 
    // the path is: COMPONENT/SRC/SRCNAME/SRCNAME_SRCVER, e.g. main/a/apt/1.1 or contrib/liba/libapt/2.0


@@ -3020,7 +3208,7 @@ std::string pkgAcqChangelog::URI(std::string const &Template,
    if (Component != NULL && strlen(Component) != 0)
       path = std::string(Component) + "/" + path;
 
    if (Component != NULL && strlen(Component) != 0)
       path = std::string(Component) + "/" + path;
 

-   return SubstVar(Template, "CHANGEPATH", path);
+   return SubstVar(Template, "@CHANGEPATH@", path);

 }
                                                                        /*}}}*/
 // AcqChangelog::Failed - Failure handler                              /*{{{*/
 }
                                                                        /*}}}*/
 // AcqChangelog::Failed - Failure handler                              /*{{{*/


@@ -3053,7 +3241,7 @@ pkgAcqChangelog::~pkgAcqChangelog()                                       /*{{{*/
 {
    if (TemporaryDirectory.empty() == false)
    {
 {
    if (TemporaryDirectory.empty() == false)
    {

-      unlink(DestFile.c_str());
+      RemoveFile("~pkgAcqChangelog", DestFile);

       rmdir(TemporaryDirectory.c_str());
    }
 }
       rmdir(TemporaryDirectory.c_str());
    }
 }


@@ -3090,7 +3278,7 @@ pkgAcqFile::pkgAcqFile(pkgAcquire * const Owner,string const &URI, HashStringLis
    {
       // Hmm, the partial file is too big, erase it
       if ((Size > 0) && (unsigned long long)Buf.st_size > Size)
    {
       // Hmm, the partial file is too big, erase it
       if ((Size > 0) && (unsigned long long)Buf.st_size > Size)

-        unlink(DestFile.c_str());
+        RemoveFile("pkgAcqFile", DestFile);

       else
         PartialSize = Buf.st_size;
    }
       else
         PartialSize = Buf.st_size;
    }


@@ -3104,14 +3292,7 @@ void pkgAcqFile::Done(string const &Message,HashStringList const &CalcHashes,
 {
    Item::Done(Message,CalcHashes,Cnf);
 
 {
    Item::Done(Message,CalcHashes,Cnf);
 

-   string FileName = LookupTag(Message,"Filename");
-   if (FileName.empty() == true)
-   {
-      Status = StatError;
-      ErrorText = "Method gave a blank filename";
-      return;
-   }
-
+   std::string const FileName = LookupTag(Message,"Filename");

    Complete = true;
 
    // The files timestamp matches
    Complete = true;
 
    // The files timestamp matches


@@ -3135,7 +3316,7 @@ void pkgAcqFile::Done(string const &Message,HashStringList const &CalcHashes,
       if (lstat(DestFile.c_str(),&St) == 0)
       {
         if (S_ISLNK(St.st_mode) != 0)
       if (lstat(DestFile.c_str(),&St) == 0)
       {
         if (S_ISLNK(St.st_mode) != 0)

-           unlink(DestFile.c_str());
+           RemoveFile("pkgAcqFile::Done", DestFile);

       }
 
       // Symlink the file
       }
 
       // Symlink the file


@@ -3144,7 +3325,7 @@ void pkgAcqFile::Done(string const &Message,HashStringList const &CalcHashes,
         _error->PushToStack();
         _error->Errno("pkgAcqFile::Done", "Symlinking file %s failed", DestFile.c_str());
         std::stringstream msg;
         _error->PushToStack();
         _error->Errno("pkgAcqFile::Done", "Symlinking file %s failed", DestFile.c_str());
         std::stringstream msg;

-        _error->DumpErrors(msg);
+        _error->DumpErrors(msg, GlobalError::DEBUG, false);

         _error->RevertToStack();
         ErrorText = msg.str();
         Status = StatError;
         _error->RevertToStack();
         ErrorText = msg.str();
         Status = StatError;