diff options
Diffstat (limited to '')
| -rw-r--r-- | apt-pkg/pkgcachegen.cc | 1863 |
1 files changed, 1863 insertions, 0 deletions
diff --git a/apt-pkg/pkgcachegen.cc b/apt-pkg/pkgcachegen.cc new file mode 100644 index 0000000..807f3bf --- /dev/null +++ b/apt-pkg/pkgcachegen.cc @@ -0,0 +1,1863 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + Package Cache Generator - Generator for the cache structure. + + This builds the cache structure from the abstract package list parser. + + ##################################################################### */ + /*}}}*/ +// Include Files /*{{{*/ +#include <config.h> + +#include <apt-pkg/configuration.h> +#include <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/indexfile.h> +#include <apt-pkg/macros.h> +#include <apt-pkg/metaindex.h> +#include <apt-pkg/mmap.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/pkgcachegen.h> +#include <apt-pkg/pkgsystem.h> +#include <apt-pkg/progress.h> +#include <apt-pkg/sourcelist.h> +#include <apt-pkg/version.h> + +#include <algorithm> +#include <iostream> +#include <memory> +#include <string> +#include <vector> +#include <stddef.h> +#include <string.h> +#include <sys/stat.h> +#include <unistd.h> + +#include <apti18n.h> + /*}}}*/ +constexpr auto APT_CACHE_START_DEFAULT = 24 * 1024 * 1024; + +template<class T> using Dynamic = pkgCacheGenerator::Dynamic<T>; +typedef std::vector<pkgIndexFile *>::iterator FileIterator; +template <typename Iter> std::vector<Iter*> pkgCacheGenerator::Dynamic<Iter>::toReMap; + +static bool IsDuplicateDescription(pkgCache &Cache, pkgCache::DescIterator Desc, + APT::StringView CurMd5, std::string const &CurLang); + +using std::string; +using APT::StringView; + +// Convert an offset returned from e.g. DynamicMMap or ptr difference to +// an uint32_t location without data loss. +template <typename T> +static inline uint32_t NarrowOffset(T ptr) +{ + uint32_t res = static_cast<uint32_t>(ptr); + if (unlikely(ptr < 0)) + abort(); + if (unlikely(static_cast<T>(res) != ptr)) + abort(); + return res; +} + +// CacheGenerator::pkgCacheGenerator - Constructor /*{{{*/ +// --------------------------------------------------------------------- +/* We set the dirty flag and make sure that is written to the disk */ +pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) : + Map(*pMap), Cache(pMap,false), Progress(Prog), + CurrentRlsFile(nullptr), CurrentFile(nullptr), d(nullptr) +{ +} +bool pkgCacheGenerator::Start() +{ + if (Map.Size() == 0) + { + // Setup the map interface.. + Cache.HeaderP = (pkgCache::Header *)Map.Data(); + _error->PushToStack(); + Map.RawAllocate(sizeof(pkgCache::Header)); + bool const newError = _error->PendingError(); + _error->MergeWithStack(); + if (newError) + return false; + if (Map.Size() <= 0) + return false; + + Map.UsePools(*Cache.HeaderP->Pools,sizeof(Cache.HeaderP->Pools)/sizeof(Cache.HeaderP->Pools[0])); + + // Starting header + *Cache.HeaderP = pkgCache::Header(); + + // make room for the hashtables for packages and groups + if (Map.RawAllocate(2 * (Cache.HeaderP->GetHashTableSize() * sizeof(map_pointer<void>))) == 0) + return false; + + map_stringitem_t const idxVerSysName = WriteStringInMap(_system->VS->Label); + if (unlikely(idxVerSysName == 0)) + return false; + map_stringitem_t const idxArchitecture = StoreString(MIXED, _config->Find("APT::Architecture")); + if (unlikely(idxArchitecture == 0)) + return false; + map_stringitem_t idxArchitectures; + + std::vector<std::string> archs = APT::Configuration::getArchitectures(); + if (archs.size() > 1) + { + std::vector<std::string>::const_iterator a = archs.begin(); + std::string list = *a; + for (++a; a != archs.end(); ++a) + list.append(",").append(*a); + idxArchitectures = WriteStringInMap(list); + if (unlikely(idxArchitectures == 0)) + return false; + } + else + idxArchitectures = idxArchitecture; + + Cache.HeaderP = (pkgCache::Header *)Map.Data(); + Cache.HeaderP->VerSysName = idxVerSysName; + Cache.HeaderP->Architecture = idxArchitecture; + Cache.HeaderP->SetArchitectures(idxArchitectures); + + // Calculate the hash for the empty map, so ReMap does not fail + Cache.HeaderP->CacheFileSize = Cache.CacheHash(); + Cache.ReMap(); + } + else + { + // Map directly from the existing file + Cache.ReMap(); + Map.UsePools(*Cache.HeaderP->Pools,sizeof(Cache.HeaderP->Pools)/sizeof(Cache.HeaderP->Pools[0])); + if (Cache.VS != _system->VS) + return _error->Error(_("Cache has an incompatible versioning system")); + } + + Cache.HeaderP->Dirty = true; + Map.Sync(0,sizeof(pkgCache::Header)); + return true; +} + /*}}}*/ +// CacheGenerator::~pkgCacheGenerator - Destructor /*{{{*/ +// --------------------------------------------------------------------- +/* We sync the data then unset the dirty flag in two steps so as to + advoid a problem during a crash */ +pkgCacheGenerator::~pkgCacheGenerator() +{ + if (_error->PendingError() == true || Map.validData() == false) + return; + if (Map.Sync() == false) + return; + + Cache.HeaderP->Dirty = false; + Cache.HeaderP->CacheFileSize = Cache.CacheHash(); + + if (_config->FindB("Debug::pkgCacheGen", false)) + std::clog << "Produced cache with hash " << Cache.HeaderP->CacheFileSize << std::endl; + Map.Sync(0,sizeof(pkgCache::Header)); +} + /*}}}*/ +void pkgCacheGenerator::ReMap(void const * const oldMap, void * const newMap, size_t oldSize) {/*{{{*/ + if (oldMap == newMap) + return; + + // Prevent multiple remaps of the same iterator. If seen.insert(iterator) + // returns (something, true) the iterator was not yet seen and we can + // remap it. + std::unordered_set<void *> seen; + + if (_config->FindB("Debug::pkgCacheGen", false)) + std::clog << "Remapping from " << oldMap << " to " << newMap << std::endl; + + Cache.ReMap(false); + + if (CurrentFile != nullptr) + CurrentFile = static_cast<pkgCache::PackageFile *>(newMap) + (CurrentFile - static_cast<pkgCache::PackageFile const *>(oldMap)); + if (CurrentRlsFile != nullptr) + CurrentRlsFile = static_cast<pkgCache::ReleaseFile *>(newMap) + (CurrentRlsFile - static_cast<pkgCache::ReleaseFile const *>(oldMap)); + +#define APT_REMAP(TYPE) \ + for (auto * const i : Dynamic<TYPE>::toReMap) \ + if (seen.insert(i).second) \ + i->ReMap(oldMap, newMap) + APT_REMAP(pkgCache::GrpIterator); + APT_REMAP(pkgCache::PkgIterator); + APT_REMAP(pkgCache::VerIterator); + APT_REMAP(pkgCache::DepIterator); + APT_REMAP(pkgCache::DescIterator); + APT_REMAP(pkgCache::PrvIterator); + APT_REMAP(pkgCache::PkgFileIterator); + APT_REMAP(pkgCache::RlsFileIterator); +#undef APT_REMAP + + for (APT::StringView* ViewP : Dynamic<APT::StringView>::toReMap) { + if (std::get<1>(seen.insert(ViewP)) == false) + continue; + // Ignore views outside of the cache. + if (ViewP->data() < static_cast<const char*>(oldMap) + || ViewP->data() > static_cast<const char*>(oldMap) + oldSize) + continue; + const char *data = ViewP->data() + (static_cast<const char*>(newMap) - static_cast<const char*>(oldMap)); + *ViewP = StringView(data , ViewP->size()); + } +} /*}}}*/ +// CacheGenerator::WriteStringInMap /*{{{*/ +map_stringitem_t pkgCacheGenerator::WriteStringInMap(const char *String, + const unsigned long &Len) { + size_t oldSize = Map.Size(); + void const * const oldMap = Map.Data(); + map_stringitem_t const index{NarrowOffset(Map.WriteString(String, Len))}; + if (index != 0) + ReMap(oldMap, Map.Data(), oldSize); + return index; +} + /*}}}*/ +// CacheGenerator::WriteStringInMap /*{{{*/ +map_stringitem_t pkgCacheGenerator::WriteStringInMap(const char *String) { + size_t oldSize = Map.Size(); + void const * const oldMap = Map.Data(); + map_stringitem_t const index{NarrowOffset(Map.WriteString(String))}; + if (index != 0) + ReMap(oldMap, Map.Data(), oldSize); + return index; +} + /*}}}*/ +uint32_t pkgCacheGenerator::AllocateInMap(const unsigned long &size) {/*{{{*/ + size_t oldSize = Map.Size(); + void const * const oldMap = Map.Data(); + auto index = Map.Allocate(size); + if (index != 0) + ReMap(oldMap, Map.Data(), oldSize); + if (index != static_cast<uint32_t>(index)) + abort(); // Internal error + return static_cast<uint32_t>(index); +} + /*}}}*/ +// CacheGenerator::MergeList - Merge the package list /*{{{*/ +// --------------------------------------------------------------------- +/* This provides the generation of the entries in the cache. Each loop + goes through a single package record from the underlying parse engine. */ +bool pkgCacheGenerator::MergeList(ListParser &List, + pkgCache::VerIterator *OutVer) +{ + List.Owner = this; + + unsigned int Counter = 0; + while (List.Step() == true) + { + string const PackageName = List.Package(); + if (PackageName.empty() == true) + return false; + + Counter++; + if (Counter % 100 == 0 && Progress != 0) + Progress->Progress(List.Offset()); + + APT::StringView Arch = List.Architecture(); + Dynamic<APT::StringView> DynArch(Arch); + APT::StringView Version = List.Version(); + Dynamic<APT::StringView> DynVersion(Version); + if (Version.empty() == true && Arch.empty() == true) + { + // package descriptions + if (MergeListGroup(List, PackageName) == false) + return false; + continue; + } + + // Get a pointer to the package structure + pkgCache::PkgIterator Pkg; + Dynamic<pkgCache::PkgIterator> DynPkg(Pkg); + if (NewPackage(Pkg, PackageName, Arch) == false) + // TRANSLATOR: The first placeholder is a package name, + // the other two should be copied verbatim as they include debug info + return _error->Error(_("Error occurred while processing %s (%s%d)"), + PackageName.c_str(), "NewPackage", 1); + + + if (Version.empty() == true) + { + if (MergeListPackage(List, Pkg) == false) + return false; + } + else + { + if (MergeListVersion(List, Pkg, Version, OutVer) == false) + return false; + } + + if (OutVer != 0) + return true; + } + + if (Cache.HeaderP->PackageCount >= std::numeric_limits<map_id_t>::max()) + return _error->Error(_("Wow, you exceeded the number of package " + "names this APT is capable of.")); + if (Cache.HeaderP->VersionCount >= std::numeric_limits<map_id_t>::max()) + return _error->Error(_("Wow, you exceeded the number of versions " + "this APT is capable of.")); + if (Cache.HeaderP->DescriptionCount >= std::numeric_limits<map_id_t>::max()) + return _error->Error(_("Wow, you exceeded the number of descriptions " + "this APT is capable of.")); + if (Cache.HeaderP->DependsCount >= std::numeric_limits<map_id_t>::max()) + return _error->Error(_("Wow, you exceeded the number of dependencies " + "this APT is capable of.")); + + return true; +} +// CacheGenerator::MergeListGroup /*{{{*/ +bool pkgCacheGenerator::MergeListGroup(ListParser &List, std::string const &GrpName) +{ + pkgCache::GrpIterator Grp = Cache.FindGrp(GrpName); + // a group has no data on it's own, only packages have it but these + // stanzas like this come from Translation- files to add descriptions, + // but without a version we don't need a description for it… + if (Grp.end() == true) + return true; + Dynamic<pkgCache::GrpIterator> DynGrp(Grp); + + pkgCache::PkgIterator Pkg; + Dynamic<pkgCache::PkgIterator> DynPkg(Pkg); + for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg)) + if (MergeListPackage(List, Pkg) == false) + return false; + + return true; +} + /*}}}*/ +// CacheGenerator::MergeListPackage /*{{{*/ +bool pkgCacheGenerator::MergeListPackage(ListParser &List, pkgCache::PkgIterator &Pkg) +{ + // we first process the package, then the descriptions + // (for deb this package processing is in fact a no-op) + pkgCache::VerIterator Ver(Cache); + Dynamic<pkgCache::VerIterator> DynVer(Ver); + if (List.UsePackage(Pkg, Ver) == false) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "UsePackage", 1); + + // Find the right version to write the description + StringView CurMd5 = List.Description_md5(); + std::vector<std::string> availDesc = List.AvailableDescriptionLanguages(); + for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver) + { + pkgCache::DescIterator VerDesc = Ver.DescriptionList(); + + // a version can only have one md5 describing it + if (VerDesc.end() == true || Cache.ViewString(VerDesc->md5sum) != CurMd5) + continue; + + map_stringitem_t md5idx = VerDesc->md5sum; + for (std::vector<std::string>::const_iterator CurLang = availDesc.begin(); CurLang != availDesc.end(); ++CurLang) + { + // don't add a new description if we have one for the given + // md5 && language + if (IsDuplicateDescription(Cache, VerDesc, CurMd5, *CurLang) == true) + continue; + + AddNewDescription(List, Ver, *CurLang, CurMd5, md5idx); + } + + // we can stop here as all "same" versions will share the description + break; + } + + return true; +} + /*}}}*/ +// CacheGenerator::MergeListVersion /*{{{*/ +bool pkgCacheGenerator::MergeListVersion(ListParser &List, pkgCache::PkgIterator &Pkg, + APT::StringView const &Version, pkgCache::VerIterator* &OutVer) +{ + pkgCache::VerIterator Ver = Pkg.VersionList(); + Dynamic<pkgCache::VerIterator> DynVer(Ver); + map_pointer<pkgCache::Version> *LastVer = &Pkg->VersionList; + void const * oldMap = Map.Data(); + + auto Hash = List.VersionHash(); + if (Ver.end() == false) + { + /* We know the list is sorted so we use that fact in the search. + Insertion of new versions is done with correct sorting */ + int Res = 1; + for (; Ver.end() == false; LastVer = &Ver->NextVer, ++Ver) + { + char const * const VerStr = Ver.VerStr(); + Res = Cache.VS->DoCmpVersion(Version.data(), Version.data() + Version.length(), + VerStr, VerStr + strlen(VerStr)); + // Version is higher as current version - insert here + if (Res > 0) + break; + // Versionstrings are equal - is hash also equal? + if (Res == 0) + { + if (List.SameVersion(Hash, Ver) == true) + break; + // sort (volatile) sources above not-sources like the status file + if (CurrentFile == nullptr || (CurrentFile->Flags & pkgCache::Flag::NotSource) == 0) + { + auto VF = Ver.FileList(); + for (; VF.end() == false; ++VF) + if (VF.File().Flagged(pkgCache::Flag::NotSource) == false) + break; + if (VF.end() == true) + break; + } + } + // proceed with the next till we have either the right + // or we found another version (which will be lower) + } + + /* We already have a version for this item, record that we saw it */ + if (Res == 0 && Ver.end() == false && Ver->Hash == Hash) + { + if (List.UsePackage(Pkg,Ver) == false) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "UsePackage", 2); + + if (NewFileVer(Ver,List) == false) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "NewFileVer", 1); + + // Read only a single record and return + if (OutVer != 0) + { + *OutVer = Ver; + return true; + } + + return true; + } + } + + // Add a new version + map_pointer<pkgCache::Version> const verindex = NewVersion(Ver, Version, Pkg.MapPointer(), Hash, *LastVer); + if (unlikely(verindex == 0)) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "NewVersion", 1); + + if (oldMap != Map.Data()) + LastVer = static_cast<map_pointer<pkgCache::Version> *>(Map.Data()) + (LastVer - static_cast<map_pointer<pkgCache::Version> const *>(oldMap)); + *LastVer = verindex; + + if (unlikely(List.NewVersion(Ver) == false)) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "NewVersion", 2); + + if (unlikely(List.UsePackage(Pkg,Ver) == false)) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "UsePackage", 3); + + if (unlikely(NewFileVer(Ver,List) == false)) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "NewFileVer", 2); + + pkgCache::GrpIterator Grp = Pkg.Group(); + Dynamic<pkgCache::GrpIterator> DynGrp(Grp); + + /* If it is the first version of this package we need to add implicit + Multi-Arch dependencies to all other package versions in the group now - + otherwise we just add them for this new version */ + if (Pkg.VersionList()->NextVer == 0) + { + pkgCache::PkgIterator P = Grp.PackageList(); + Dynamic<pkgCache::PkgIterator> DynP(P); + for (; P.end() != true; P = Grp.NextPkg(P)) + { + if (P->ID == Pkg->ID) + continue; + pkgCache::VerIterator V = P.VersionList(); + Dynamic<pkgCache::VerIterator> DynV(V); + for (; V.end() != true; ++V) + if (unlikely(AddImplicitDepends(V, Pkg) == false)) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "AddImplicitDepends", 1); + } + } + if (unlikely(AddImplicitDepends(Grp, Pkg, Ver) == false)) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Pkg.Name(), "AddImplicitDepends", 2); + + // Read only a single record and return + if (OutVer != 0) + { + *OutVer = Ver; + return true; + } + + /* Record the Description(s) based on their master md5sum */ + StringView CurMd5 = List.Description_md5(); + + /* Before we add a new description we first search in the group for + a version with a description of the same MD5 - if so we reuse this + description group instead of creating our own for this version */ + for (pkgCache::PkgIterator P = Grp.PackageList(); + P.end() == false; P = Grp.NextPkg(P)) + { + for (pkgCache::VerIterator V = P.VersionList(); + V.end() == false; ++V) + { + if (V->DescriptionList == 0 || Cache.ViewString(V.DescriptionList()->md5sum) != CurMd5) + continue; + Ver->DescriptionList = V->DescriptionList; + } + } + + // We haven't found reusable descriptions, so add the first description(s) + map_stringitem_t md5idx = Ver->DescriptionList == 0 ? 0 : Ver.DescriptionList()->md5sum; + std::vector<std::string> availDesc = List.AvailableDescriptionLanguages(); + for (std::vector<std::string>::const_iterator CurLang = availDesc.begin(); CurLang != availDesc.end(); ++CurLang) + if (AddNewDescription(List, Ver, *CurLang, CurMd5, md5idx) == false) + return false; + return true; +} + /*}}}*/ +bool pkgCacheGenerator::AddNewDescription(ListParser &List, pkgCache::VerIterator &Ver, std::string const &lang, APT::StringView CurMd5, map_stringitem_t &md5idx) /*{{{*/ +{ + pkgCache::DescIterator Desc; + Dynamic<pkgCache::DescIterator> DynDesc(Desc); + + map_pointer<pkgCache::Description> const descindex = NewDescription(Desc, lang, CurMd5, md5idx); + if (unlikely(descindex == 0)) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Ver.ParentPkg().Name(), "NewDescription", 1); + + md5idx = Desc->md5sum; + Desc->ParentPkg = Ver.ParentPkg().MapPointer(); + + // we add at the end, so that the start is constant as we need + // that to be able to efficiently share these lists + pkgCache::DescIterator VerDesc = Ver.DescriptionList(); // old value might be invalid after ReMap + for (;VerDesc.end() == false && VerDesc->NextDesc != 0; ++VerDesc); + map_pointer<pkgCache::Description> * const LastNextDesc = (VerDesc.end() == true) ? &Ver->DescriptionList : &VerDesc->NextDesc; + *LastNextDesc = descindex; + + if (NewFileDesc(Desc,List) == false) + return _error->Error(_("Error occurred while processing %s (%s%d)"), + Ver.ParentPkg().Name(), "NewFileDesc", 1); + + return true; +} + /*}}}*/ + /*}}}*/ +// CacheGenerator::NewGroup - Add a new group /*{{{*/ +// --------------------------------------------------------------------- +/* This creates a new group structure and adds it to the hash table */ +bool pkgCacheGenerator::NewGroup(pkgCache::GrpIterator &Grp, StringView Name) +{ + Dynamic<StringView> DName(Name); + Grp = Cache.FindGrp(Name); + if (Grp.end() == false) + return true; + + // Get a structure + auto const Group = AllocateInMap<pkgCache::Group>(); + if (unlikely(Group == 0)) + return false; + + map_stringitem_t const idxName = WriteStringInMap(Name); + if (unlikely(idxName == 0)) + return false; + + Grp = pkgCache::GrpIterator(Cache, Cache.GrpP + Group); + Grp->Name = idxName; + + // Insert it into the hash table + unsigned long const Hash = Cache.Hash(Name); + map_pointer<pkgCache::Group> *insertAt = &Cache.HeaderP->GrpHashTableP()[Hash]; + + while (*insertAt != 0 && StringViewCompareFast(Name, Cache.ViewString((Cache.GrpP + *insertAt)->Name)) > 0) + insertAt = &(Cache.GrpP + *insertAt)->Next; + Grp->Next = *insertAt; + *insertAt = Group; + + Grp->ID = Cache.HeaderP->GroupCount++; + return true; +} + /*}}}*/ +// CacheGenerator::NewPackage - Add a new package /*{{{*/ +// --------------------------------------------------------------------- +/* This creates a new package structure and adds it to the hash table */ +bool pkgCacheGenerator::NewPackage(pkgCache::PkgIterator &Pkg, StringView Name, + StringView Arch) { + pkgCache::GrpIterator Grp; + Dynamic<StringView> DName(Name); + Dynamic<StringView> DArch(Arch); + Dynamic<pkgCache::GrpIterator> DynGrp(Grp); + if (unlikely(NewGroup(Grp, Name) == false)) + return false; + + Pkg = Grp.FindPkg(Arch); + if (Pkg.end() == false) + return true; + + // Get a structure + auto const Package = AllocateInMap<pkgCache::Package>(); + if (unlikely(Package == 0)) + return false; + Pkg = pkgCache::PkgIterator(Cache,Cache.PkgP + Package); + + // Set the name, arch and the ID + Pkg->Group = Grp.MapPointer(); + // all is mapped to the native architecture + map_stringitem_t const idxArch = (Arch == "all") ? Cache.HeaderP->Architecture : StoreString(MIXED, Arch); + if (unlikely(idxArch == 0)) + return false; + Pkg->Arch = idxArch; + Pkg->ID = Cache.HeaderP->PackageCount++; + + // Insert the package into our package list + if (Grp->FirstPackage == 0) // the group is new + { + Grp->FirstPackage = Package; + // Insert it into the hash table + map_id_t const Hash = Cache.Hash(Name); + map_pointer<pkgCache::Package> *insertAt = &Cache.HeaderP->PkgHashTableP()[Hash]; + while (*insertAt != 0 && StringViewCompareFast(Name, Cache.ViewString((Cache.GrpP + (Cache.PkgP + *insertAt)->Group)->Name)) > 0) + insertAt = &(Cache.PkgP + *insertAt)->NextPackage; + Pkg->NextPackage = *insertAt; + *insertAt = Package; + } + else // Group the Packages together + { + // if sibling is provided by another package, this one is too + { + pkgCache::PkgIterator const M = Grp.FindPreferredPkg(false); // native or any foreign pkg will do + if (M.end() == false) { + pkgCache::PrvIterator Prv; + pkgCache::VerIterator Ver; + Dynamic<pkgCache::PrvIterator> DynPrv(Prv); + Dynamic<pkgCache::VerIterator> DynVer(Ver); + for (Prv = M.ProvidesList(); Prv.end() == false; ++Prv) + { + if ((Prv->Flags & pkgCache::Flag::ArchSpecific) != 0) + continue; + Ver = Prv.OwnerVer(); + if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign && + (Prv->Flags & pkgCache::Flag::MultiArchImplicit) == 0) + { + if (APT::Configuration::checkArchitecture(Ver.ParentPkg().Arch()) == false) + continue; + if (NewProvides(Ver, Pkg, Prv->ProvideVersion, Prv->Flags) == false) + return false; + } + } + } + } + // let M-A:foreign package siblings provide this package + { + pkgCache::PkgIterator P; + pkgCache::VerIterator Ver; + Dynamic<pkgCache::PkgIterator> DynP(P); + Dynamic<pkgCache::VerIterator> DynVer(Ver); + + for (P = Grp.PackageList(); P.end() == false; P = Grp.NextPkg(P)) + { + if (APT::Configuration::checkArchitecture(P.Arch()) == false) + continue; + for (Ver = P.VersionList(); Ver.end() == false; ++Ver) + if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign) + if (NewProvides(Ver, Pkg, Ver->VerStr, pkgCache::Flag::MultiArchImplicit) == false) + return false; + } + } + // and negative dependencies, don't forget negative dependencies + { + pkgCache::PkgIterator const M = Grp.FindPreferredPkg(false); + if (M.end() == false) { + pkgCache::DepIterator Dep; + Dynamic<pkgCache::DepIterator> DynDep(Dep); + for (Dep = M.RevDependsList(); Dep.end() == false; ++Dep) + { + if ((Dep->CompareOp & (pkgCache::Dep::ArchSpecific | pkgCache::Dep::MultiArchImplicit)) != 0) + continue; + if (Dep->Type != pkgCache::Dep::DpkgBreaks && Dep->Type != pkgCache::Dep::Conflicts && + Dep->Type != pkgCache::Dep::Replaces) + continue; + pkgCache::VerIterator Ver = Dep.ParentVer(); + Dynamic<pkgCache::VerIterator> DynVer(Ver); + map_pointer<pkgCache::Dependency> * unused = NULL; + if (NewDepends(Pkg, Ver, Dep->Version, Dep->CompareOp, Dep->Type, unused) == false) + return false; + } + } + } + + // this package is the new last package + pkgCache::PkgIterator LastPkg(Cache, Cache.PkgP + Grp->LastPackage); + Pkg->NextPackage = LastPkg->NextPackage; + LastPkg->NextPackage = Package; + } + Grp->LastPackage = Package; + + // lazy-create foo (of amd64) provides foo:amd64 at the time we first need it + if (Arch == "any") + { + size_t const found = Name.rfind(':'); + StringView ArchA = Name.substr(found + 1); + if (ArchA != "any") + { + // ArchA is used inside the loop which might remap (NameA is not used) + Dynamic<StringView> DynArchA(ArchA); + StringView NameA = Name.substr(0, found); + pkgCache::PkgIterator PkgA = Cache.FindPkg(NameA, ArchA); + Dynamic<pkgCache::PkgIterator> DynPkgA(PkgA); + if (PkgA.end()) + { + Dynamic<StringView> DynNameA(NameA); + if (NewPackage(PkgA, NameA, ArchA) == false) + return false; + } + if (unlikely(PkgA.end())) + return _error->Fatal("NewPackage was successful for %s:%s," + "but the package doesn't exist anyhow!", + NameA.to_string().c_str(), ArchA.to_string().c_str()); + else + { + pkgCache::PrvIterator Prv = PkgA.ProvidesList(); + for (; Prv.end() == false; ++Prv) + { + if (Prv.IsMultiArchImplicit()) + continue; + pkgCache::VerIterator V = Prv.OwnerVer(); + if (ArchA != V.ParentPkg().Arch()) + continue; + if (NewProvides(V, Pkg, V->VerStr, pkgCache::Flag::MultiArchImplicit | pkgCache::Flag::ArchSpecific) == false) + return false; + } + pkgCache::VerIterator V = PkgA.VersionList(); + Dynamic<pkgCache::VerIterator> DynV(V); + for (; V.end() == false; ++V) + { + if (NewProvides(V, Pkg, V->VerStr, pkgCache::Flag::MultiArchImplicit | pkgCache::Flag::ArchSpecific) == false) + return false; + } + } + } + } + return true; +} + /*}}}*/ +// CacheGenerator::AddImplicitDepends /*{{{*/ +bool pkgCacheGenerator::AddImplicitDepends(pkgCache::GrpIterator &G, + pkgCache::PkgIterator &P, + pkgCache::VerIterator &V) +{ + APT::StringView Arch = P.Arch() == NULL ? "" : P.Arch(); + Dynamic<APT::StringView> DynArch(Arch); + map_pointer<pkgCache::Dependency> *OldDepLast = NULL; + /* MultiArch handling introduces a lot of implicit Dependencies: + - MultiArch: same → Co-Installable if they have the same version + - All others conflict with all other group members */ + bool const coInstall = ((V->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same); + pkgCache::PkgIterator D = G.PackageList(); + Dynamic<pkgCache::PkgIterator> DynD(D); + map_stringitem_t const VerStrIdx = V->VerStr; + for (; D.end() != true; D = G.NextPkg(D)) + { + if (Arch == D.Arch() || D->VersionList == 0) + continue; + /* We allow only one installed arch at the time + per group, therefore each group member conflicts + with all other group members */ + if (coInstall == true) + { + // Replaces: ${self}:other ( << ${binary:Version}) + NewDepends(D, V, VerStrIdx, + pkgCache::Dep::Less | pkgCache::Dep::MultiArchImplicit, pkgCache::Dep::Replaces, + OldDepLast); + // Breaks: ${self}:other (!= ${binary:Version}) + NewDepends(D, V, VerStrIdx, + pkgCache::Dep::NotEquals | pkgCache::Dep::MultiArchImplicit, pkgCache::Dep::DpkgBreaks, + OldDepLast); + } else { + // Conflicts: ${self}:other + NewDepends(D, V, 0, + pkgCache::Dep::NoOp | pkgCache::Dep::MultiArchImplicit, pkgCache::Dep::Conflicts, + OldDepLast); + } + } + return true; +} +bool pkgCacheGenerator::AddImplicitDepends(pkgCache::VerIterator &V, + pkgCache::PkgIterator &D) +{ + /* MultiArch handling introduces a lot of implicit Dependencies: + - MultiArch: same → Co-Installable if they have the same version + - All others conflict with all other group members */ + map_pointer<pkgCache::Dependency> *OldDepLast = NULL; + bool const coInstall = ((V->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same); + if (coInstall == true) + { + map_stringitem_t const VerStrIdx = V->VerStr; + // Replaces: ${self}:other ( << ${binary:Version}) + NewDepends(D, V, VerStrIdx, + pkgCache::Dep::Less | pkgCache::Dep::MultiArchImplicit, pkgCache::Dep::Replaces, + OldDepLast); + // Breaks: ${self}:other (!= ${binary:Version}) + NewDepends(D, V, VerStrIdx, + pkgCache::Dep::NotEquals | pkgCache::Dep::MultiArchImplicit, pkgCache::Dep::DpkgBreaks, + OldDepLast); + } else { + // Conflicts: ${self}:other + NewDepends(D, V, 0, + pkgCache::Dep::NoOp | pkgCache::Dep::MultiArchImplicit, pkgCache::Dep::Conflicts, + OldDepLast); + } + return true; +} + + /*}}}*/ +// CacheGenerator::NewFileVer - Create a new File<->Version association /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool pkgCacheGenerator::NewFileVer(pkgCache::VerIterator &Ver, + ListParser &List) +{ + if (CurrentFile == nullptr) + return true; + + // Get a structure + auto const VerFile = AllocateInMap<pkgCache::VerFile>(); + if (VerFile == 0) + return false; + + pkgCache::VerFileIterator VF(Cache,Cache.VerFileP + VerFile); + VF->File = map_pointer<pkgCache::PackageFile>{NarrowOffset(CurrentFile - Cache.PkgFileP)}; + + // Link it to the end of the list + map_pointer<pkgCache::VerFile> *Last = &Ver->FileList; + for (pkgCache::VerFileIterator V = Ver.FileList(); V.end() == false; ++V) + Last = &V->NextFile; + VF->NextFile = *Last; + *Last = VF.MapPointer(); + + VF->Offset = List.Offset(); + VF->Size = List.Size(); + if (Cache.HeaderP->MaxVerFileSize < VF->Size) + Cache.HeaderP->MaxVerFileSize = VF->Size; + Cache.HeaderP->VerFileCount++; + + return true; +} + /*}}}*/ +// CacheGenerator::NewVersion - Create a new Version /*{{{*/ +// --------------------------------------------------------------------- +/* This puts a version structure in the linked list */ +map_pointer<pkgCache::Version> pkgCacheGenerator::NewVersion(pkgCache::VerIterator &Ver, + APT::StringView const &VerStr, + map_pointer<pkgCache::Package> const ParentPkg, + uint32_t Hash, + map_pointer<pkgCache::Version> const Next) +{ + // Get a structure + auto const Version = AllocateInMap<pkgCache::Version>(); + if (Version == 0) + return 0; + + // Fill it in + Ver = pkgCache::VerIterator(Cache,Cache.VerP + Version); + auto d = AllocateInMap<pkgCache::Version::Extra>(); // sequence point so Ver can be moved if needed + Ver->d = d; + if (not Ver.PhasedUpdatePercentage(100)) + abort(); + + //Dynamic<pkgCache::VerIterator> DynV(Ver); // caller MergeListVersion already takes care of it + Ver->NextVer = Next; + Ver->ParentPkg = ParentPkg; + Ver->Hash = Hash; + Ver->ID = Cache.HeaderP->VersionCount++; + + // try to find the version string in the group for reuse + pkgCache::PkgIterator Pkg = Ver.ParentPkg(); + pkgCache::GrpIterator Grp = Pkg.Group(); + if (Pkg.end() == false && Grp.end() == false) + { + for (pkgCache::PkgIterator P = Grp.PackageList(); P.end() == false; P = Grp.NextPkg(P)) + { + if (Pkg == P) + continue; + for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V) + { + int const cmp = strncmp(V.VerStr(), VerStr.data(), VerStr.length()); + if (cmp == 0 && V.VerStr()[VerStr.length()] == '\0') + { + Ver->VerStr = V->VerStr; + return Version; + } + else if (cmp < 0) + break; + } + } + } + // haven't found the version string, so create + map_stringitem_t const idxVerStr = StoreString(VERSIONNUMBER, VerStr); + if (unlikely(idxVerStr == 0)) + return 0; + Ver->VerStr = idxVerStr; + return Version; +} + /*}}}*/ +// CacheGenerator::NewFileDesc - Create a new File<->Desc association /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool pkgCacheGenerator::NewFileDesc(pkgCache::DescIterator &Desc, + ListParser &List) +{ + if (CurrentFile == nullptr) + return true; + + // Get a structure + auto const DescFile = AllocateInMap<pkgCache::DescFile>(); + if (DescFile == 0) + return false; + + pkgCache::DescFileIterator DF(Cache,Cache.DescFileP + DescFile); + DF->File = map_pointer<pkgCache::PackageFile>{NarrowOffset(CurrentFile - Cache.PkgFileP)}; + + // Link it to the end of the list + map_pointer<pkgCache::DescFile> *Last = &Desc->FileList; + for (pkgCache::DescFileIterator D = Desc.FileList(); D.end() == false; ++D) + Last = &D->NextFile; + + DF->NextFile = *Last; + *Last = DF.MapPointer(); + + DF->Offset = List.Offset(); + DF->Size = List.Size(); + if (Cache.HeaderP->MaxDescFileSize < DF->Size) + Cache.HeaderP->MaxDescFileSize = DF->Size; + Cache.HeaderP->DescFileCount++; + + return true; +} + /*}}}*/ +// CacheGenerator::NewDescription - Create a new Description /*{{{*/ +// --------------------------------------------------------------------- +/* This puts a description structure in the linked list */ +map_pointer<pkgCache::Description> pkgCacheGenerator::NewDescription(pkgCache::DescIterator &Desc, + const string &Lang, + APT::StringView md5sum, + map_stringitem_t const idxmd5str) +{ + // Get a structure + auto const Description = AllocateInMap<pkgCache::Description>(); + if (Description == 0) + return 0; + + // Fill it in + Desc = pkgCache::DescIterator(Cache,Cache.DescP + Description); + Desc->ID = Cache.HeaderP->DescriptionCount++; + map_stringitem_t const idxlanguage_code = StoreString(MIXED, Lang); + if (unlikely(idxlanguage_code == 0)) + return 0; + Desc->language_code = idxlanguage_code; + + if (idxmd5str != 0) + Desc->md5sum = idxmd5str; + else + { + map_stringitem_t const idxmd5sum = WriteStringInMap(md5sum); + if (unlikely(idxmd5sum == 0)) + return 0; + Desc->md5sum = idxmd5sum; + } + + return Description; +} + /*}}}*/ +// CacheGenerator::NewDepends - Create a dependency element /*{{{*/ +// --------------------------------------------------------------------- +/* This creates a dependency element in the tree. It is linked to the + version and to the package that it is pointing to. */ +bool pkgCacheGenerator::NewDepends(pkgCache::PkgIterator &Pkg, + pkgCache::VerIterator &Ver, + map_stringitem_t const Version, + uint8_t const Op, + uint8_t const Type, + map_pointer<pkgCache::Dependency> * &OldDepLast) +{ + void const * const oldMap = Map.Data(); + // Get a structure + auto const Dependency = AllocateInMap<pkgCache::Dependency>(); + if (unlikely(Dependency == 0)) + return false; + + bool isDuplicate = false; + map_pointer<pkgCache::DependencyData> DependencyData = 0; + map_pointer<pkgCache::DependencyData> PreviousData = 0; + if (Pkg->RevDepends != 0) + { + pkgCache::Dependency const * const L = Cache.DepP + Pkg->RevDepends; + DependencyData = L->DependencyData; + do { + pkgCache::DependencyData const * const D = Cache.DepDataP + DependencyData; + if (Version > D->Version) + break; + if (D->Version == Version && D->Type == Type && D->CompareOp == Op) + { + isDuplicate = true; + break; + } + PreviousData = DependencyData; + DependencyData = D->NextData; + } while (DependencyData != 0); + } + + if (isDuplicate == false) + { + DependencyData = AllocateInMap<pkgCache::DependencyData>(); + if (unlikely(DependencyData == 0)) + return false; + } + + pkgCache::Dependency * Link = Cache.DepP + Dependency; + Link->ParentVer = Ver.MapPointer(); + Link->DependencyData = DependencyData; + Link->ID = Cache.HeaderP->DependsCount++; + + pkgCache::DepIterator Dep(Cache, Link); + if (isDuplicate == false) + { + Dep->Type = Type; + Dep->CompareOp = Op; + Dep->Version = Version; + Dep->Package = Pkg.MapPointer(); + ++Cache.HeaderP->DependsDataCount; + if (PreviousData != 0) + { + pkgCache::DependencyData * const D = Cache.DepDataP + PreviousData; + Dep->NextData = D->NextData; + D->NextData = DependencyData; + } + else if (Pkg->RevDepends != 0) + { + pkgCache::Dependency const * const D = Cache.DepP + Pkg->RevDepends; + Dep->NextData = D->DependencyData; + } + } + + if (isDuplicate == true || PreviousData != 0) + { + pkgCache::Dependency * const L = Cache.DepP + Pkg->RevDepends; + Link->NextRevDepends = L->NextRevDepends; + L->NextRevDepends = Dependency; + } + else + { + Link->NextRevDepends = Pkg->RevDepends; + Pkg->RevDepends = Dependency; + } + + + // Do we know where to link the Dependency to? + if (OldDepLast == NULL) + { + OldDepLast = &Ver->DependsList; + for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; ++D) + OldDepLast = &D->NextDepends; + } else if (oldMap != Map.Data()) + OldDepLast = static_cast<map_pointer<pkgCache::Dependency> *>(Map.Data()) + (OldDepLast - static_cast<map_pointer<pkgCache::Dependency> const *>(oldMap)); + + Dep->NextDepends = *OldDepLast; + *OldDepLast = Dependency; + OldDepLast = &Dep->NextDepends; + return true; +} + /*}}}*/ +// ListParser::NewDepends - Create the environment for a new dependency /*{{{*/ +// --------------------------------------------------------------------- +/* This creates a Group and the Package to link this dependency to if + needed and handles also the caching of the old endpoint */ +bool pkgCacheListParser::NewDepends(pkgCache::VerIterator &Ver, + StringView PackageName, + StringView Arch, + StringView Version, + uint8_t const Op, + uint8_t const Type) +{ + pkgCache::GrpIterator Grp; + Dynamic<pkgCache::GrpIterator> DynGrp(Grp); + Dynamic<StringView> DynPackageName(PackageName); + Dynamic<StringView> DynArch(Arch); + Dynamic<StringView> DynVersion(Version); + if (unlikely(Owner->NewGroup(Grp, PackageName) == false)) + return false; + + map_stringitem_t idxVersion = 0; + if (Version.empty() == false) + { + int const CmpOp = Op & 0x0F; + // =-deps are used (79:1) for lockstep on same-source packages (e.g. data-packages) + if (CmpOp == pkgCache::Dep::Equals && Version == Ver.VerStr()) + idxVersion = Ver->VerStr; + + if (idxVersion == 0) + { + idxVersion = StoreString(pkgCacheGenerator::VERSIONNUMBER, Version); + if (unlikely(idxVersion == 0)) + return false; + } + } + + bool const isNegative = (Type == pkgCache::Dep::DpkgBreaks || + Type == pkgCache::Dep::Conflicts || + Type == pkgCache::Dep::Replaces); + + pkgCache::PkgIterator Pkg; + Dynamic<pkgCache::PkgIterator> DynPkg(Pkg); + if (isNegative == false || (Op & pkgCache::Dep::ArchSpecific) == pkgCache::Dep::ArchSpecific || Grp->FirstPackage == 0) + { + // Locate the target package + Pkg = Grp.FindPkg(Arch); + if (Pkg.end() == true) { + if (unlikely(Owner->NewPackage(Pkg, PackageName, Arch) == false)) + return false; + } + + /* Caching the old end point speeds up generation substantially */ + if (OldDepVer != Ver) { + OldDepLast = NULL; + OldDepVer = Ver; + } + + return Owner->NewDepends(Pkg, Ver, idxVersion, Op, Type, OldDepLast); + } + else + { + /* Caching the old end point speeds up generation substantially */ + if (OldDepVer != Ver) { + OldDepLast = NULL; + OldDepVer = Ver; + } + + for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg)) + { + if (Owner->NewDepends(Pkg, Ver, idxVersion, Op, Type, OldDepLast) == false) + return false; + } + } + return true; +} + /*}}}*/ +// ListParser::NewProvides - Create a Provides element /*{{{*/ +bool pkgCacheListParser::NewProvides(pkgCache::VerIterator &Ver, + StringView PkgName, + StringView PkgArch, + StringView Version, + uint8_t const Flags) +{ + pkgCache const &Cache = Owner->Cache; + Dynamic<StringView> DynPkgName(PkgName); + Dynamic<StringView> DynArch(PkgArch); + Dynamic<StringView> DynVersion(Version); + + // We do not add self referencing provides + if (Ver.ParentPkg().Name() == PkgName && (PkgArch == Ver.ParentPkg().Arch() || + (PkgArch == "all" && strcmp((Cache.StrP + Cache.HeaderP->Architecture), Ver.ParentPkg().Arch()) == 0)) && + (Version.empty() || Version == Ver.VerStr())) + return true; + + // Locate the target package + pkgCache::PkgIterator Pkg; + Dynamic<pkgCache::PkgIterator> DynPkg(Pkg); + if (unlikely(Owner->NewPackage(Pkg,PkgName, PkgArch) == false)) + return false; + + map_stringitem_t idxProvideVersion = 0; + if (Version.empty() == false) { + idxProvideVersion = StoreString(pkgCacheGenerator::VERSIONNUMBER, Version); + if (unlikely(idxProvideVersion == 0)) + return false; + } + return Owner->NewProvides(Ver, Pkg, idxProvideVersion, Flags); +} +bool pkgCacheGenerator::NewProvides(pkgCache::VerIterator &Ver, + pkgCache::PkgIterator &Pkg, + map_stringitem_t const ProvideVersion, + uint8_t const Flags) +{ + // Get a structure + auto const Provides = AllocateInMap<pkgCache::Provides>(); + if (unlikely(Provides == 0)) + return false; + ++Cache.HeaderP->ProvidesCount; + + // Fill it in + pkgCache::PrvIterator Prv(Cache,Cache.ProvideP + Provides,Cache.PkgP); + Prv->Version = Ver.MapPointer(); + Prv->ProvideVersion = ProvideVersion; + Prv->Flags = Flags; + Prv->NextPkgProv = Ver->ProvidesList; + Ver->ProvidesList = Prv.MapPointer(); + + // Link it to the package + Prv->ParentPkg = Pkg.MapPointer(); + Prv->NextProvides = Pkg->ProvidesList; + Pkg->ProvidesList = Prv.MapPointer(); + return true; +} + /*}}}*/ +// ListParser::NewProvidesAllArch - add provides for all architectures /*{{{*/ +bool pkgCacheListParser::NewProvidesAllArch(pkgCache::VerIterator &Ver, StringView Package, + StringView Version, uint8_t const Flags) { + pkgCache &Cache = Owner->Cache; + pkgCache::GrpIterator Grp = Cache.FindGrp(Package); + Dynamic<pkgCache::GrpIterator> DynGrp(Grp); + Dynamic<StringView> DynPackage(Package); + Dynamic<StringView> DynVersion(Version); + + if (Grp.end() == true || Grp->FirstPackage == 0) + return NewProvides(Ver, Package, Cache.NativeArch(), Version, Flags); + else + { + map_stringitem_t idxProvideVersion = 0; + if (Version.empty() == false) { + idxProvideVersion = StoreString(pkgCacheGenerator::VERSIONNUMBER, Version); + if (unlikely(idxProvideVersion == 0)) + return false; + } + + bool const isImplicit = (Flags & pkgCache::Flag::MultiArchImplicit) == pkgCache::Flag::MultiArchImplicit; + bool const isArchSpecific = (Flags & pkgCache::Flag::ArchSpecific) == pkgCache::Flag::ArchSpecific; + pkgCache::PkgIterator OwnerPkg = Ver.ParentPkg(); + Dynamic<pkgCache::PkgIterator> DynOwnerPkg(OwnerPkg); + pkgCache::PkgIterator Pkg; + Dynamic<pkgCache::PkgIterator> DynPkg(Pkg); + for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg)) + { + if (isImplicit && OwnerPkg == Pkg) + continue; + if (isArchSpecific == false && APT::Configuration::checkArchitecture(OwnerPkg.Arch()) == false) + continue; + if (Owner->NewProvides(Ver, Pkg, idxProvideVersion, Flags) == false) + return false; + } + } + return true; +} + /*}}}*/ +bool pkgCacheListParser::SameVersion(uint32_t Hash, /*{{{*/ + pkgCache::VerIterator const &Ver) +{ + return Hash == Ver->Hash; +} + /*}}}*/ +// CacheGenerator::SelectReleaseFile - Select the current release file the indexes belong to /*{{{*/ +bool pkgCacheGenerator::SelectReleaseFile(const string &File,const string &Site, + unsigned long Flags) +{ + CurrentRlsFile = nullptr; + if (File.empty() && Site.empty()) + return true; + + // Get some space for the structure + auto const idxFile = AllocateInMap<pkgCache::ReleaseFile>(); + if (unlikely(idxFile == 0)) + return false; + CurrentRlsFile = Cache.RlsFileP + idxFile; + + // Fill it in + map_stringitem_t const idxFileName = WriteStringInMap(File); + map_stringitem_t const idxSite = StoreString(MIXED, Site); + if (unlikely(idxFileName == 0 || idxSite == 0)) + return false; + CurrentRlsFile->FileName = idxFileName; + CurrentRlsFile->Site = idxSite; + CurrentRlsFile->NextFile = Cache.HeaderP->RlsFileList; + CurrentRlsFile->Flags = Flags; + CurrentRlsFile->ID = Cache.HeaderP->ReleaseFileCount; + RlsFileName = File; + Cache.HeaderP->RlsFileList = map_pointer<pkgCache::ReleaseFile>{NarrowOffset(CurrentRlsFile - Cache.RlsFileP)}; + Cache.HeaderP->ReleaseFileCount++; + + return true; +} + /*}}}*/ +// CacheGenerator::SelectFile - Select the current file being parsed /*{{{*/ +// --------------------------------------------------------------------- +/* This is used to select which file is to be associated with all newly + added versions. The caller is responsible for setting the IMS fields. */ +bool pkgCacheGenerator::SelectFile(std::string const &File, + pkgIndexFile const &Index, + std::string const &Architecture, + std::string const &Component, + unsigned long const Flags) +{ + CurrentFile = nullptr; + // Get some space for the structure + auto const idxFile = AllocateInMap<pkgCache::PackageFile>(); + if (unlikely(idxFile == 0)) + return false; + CurrentFile = Cache.PkgFileP + idxFile; + + // Fill it in + map_stringitem_t const idxFileName = WriteStringInMap(File); + if (unlikely(idxFileName == 0)) + return false; + CurrentFile->FileName = idxFileName; + CurrentFile->NextFile = Cache.HeaderP->FileList; + CurrentFile->ID = Cache.HeaderP->PackageFileCount; + map_stringitem_t const idxIndexType = StoreString(MIXED, Index.GetType()->Label); + if (unlikely(idxIndexType == 0)) + return false; + CurrentFile->IndexType = idxIndexType; + if (Architecture.empty()) + CurrentFile->Architecture = 0; + else + { + map_stringitem_t const arch = StoreString(pkgCacheGenerator::MIXED, Architecture); + if (unlikely(arch == 0)) + return false; + CurrentFile->Architecture = arch; + } + map_stringitem_t const component = StoreString(pkgCacheGenerator::MIXED, Component); + if (unlikely(component == 0)) + return false; + CurrentFile->Component = component; + CurrentFile->Flags = Flags; + if (CurrentRlsFile != nullptr) + CurrentFile->Release = map_pointer<pkgCache::ReleaseFile>{NarrowOffset(CurrentRlsFile - Cache.RlsFileP)}; + else + CurrentFile->Release = 0; + PkgFileName = File; + Cache.HeaderP->FileList = map_pointer<pkgCache::PackageFile>{NarrowOffset(CurrentFile - Cache.PkgFileP)}; + Cache.HeaderP->PackageFileCount++; + + if (Progress != 0) + Progress->SubProgress(Index.Size()); + return true; +} + /*}}}*/ +// CacheGenerator::WriteUniqueString - Insert a unique string /*{{{*/ +// --------------------------------------------------------------------- +/* This is used to create handles to strings. Given the same text it + always returns the same number */ +map_stringitem_t pkgCacheGenerator::StoreString(enum StringType const type, const char *S, + unsigned int Size) +{ + auto strings = &strMixed; + switch(type) { + case MIXED: strings = &strMixed; break; + case VERSIONNUMBER: strings = &strVersions; break; + case SECTION: strings = &strSections; break; + default: _error->Fatal("Unknown enum type used for string storage of '%.*s'", Size, S); return 0; + } + + auto const item = strings->find({S, Size, nullptr, 0}); + if (item != strings->end()) + return item->item; + + map_stringitem_t const idxString = WriteStringInMap(S,Size); + strings->insert({nullptr, Size, this, idxString}); + return idxString; +} + /*}}}*/ +// CheckValidity - Check that a cache is up-to-date /*{{{*/ +// --------------------------------------------------------------------- +/* This just verifies that each file in the list of index files exists, + has matching attributes with the cache and the cache does not have + any extra files. */ +class APT_HIDDEN ScopedErrorRevert { +public: + ScopedErrorRevert() { _error->PushToStack(); } + ~ScopedErrorRevert() { _error->RevertToStack(); } +}; + +static bool CheckValidity(FileFd &CacheFile, std::string const &CacheFileName, + pkgSourceList &List, + FileIterator const Start, + FileIterator const End, + MMap **OutMap = 0, + pkgCache **OutCache = 0) +{ + if (CacheFileName.empty()) + return false; + ScopedErrorRevert ser; + + bool const Debug = _config->FindB("Debug::pkgCacheGen", false); + // No file, certainly invalid + if (CacheFile.Open(CacheFileName, FileFd::ReadOnly, FileFd::None) == false) + { + if (Debug == true) + std::clog << "CacheFile " << CacheFileName << " doesn't exist" << std::endl; + return false; + } + + if (_config->FindI("APT::Cache-Start", 0) == 0) + { + auto const size = CacheFile.FileSize(); + if (std::numeric_limits<int>::max() >= size && size > APT_CACHE_START_DEFAULT) + _config->Set("APT::Cache-Start", size); + } + + if (List.GetLastModifiedTime() > CacheFile.ModificationTime()) + { + if (Debug == true) + std::clog << "sources.list is newer than the cache" << std::endl; + return false; + } + + // Map it + std::unique_ptr<MMap> Map(new MMap(CacheFile,0)); + if (unlikely(Map->validData()) == false) + return false; + std::unique_ptr<pkgCache> CacheP(new pkgCache(Map.get())); + pkgCache &Cache = *CacheP.get(); + if (_error->PendingError() || Map->Size() == 0) + { + if (Debug == true) + std::clog << "Errors are pending or Map is empty() for " << CacheFileName << std::endl; + return false; + } + + std::unique_ptr<bool[]> RlsVisited(new bool[Cache.HeaderP->ReleaseFileCount]); + memset(RlsVisited.get(),0,sizeof(RlsVisited[0])*Cache.HeaderP->ReleaseFileCount); + std::vector<pkgIndexFile *> Files; + for (pkgSourceList::const_iterator i = List.begin(); i != List.end(); ++i) + { + if (Debug == true) + std::clog << "Checking RlsFile " << (*i)->Describe() << ": "; + pkgCache::RlsFileIterator const RlsFile = (*i)->FindInCache(Cache, true); + if (RlsFile.end() == true) + { + if (Debug == true) + std::clog << "FindInCache returned end-Pointer" << std::endl; + return false; + } + + RlsVisited[RlsFile->ID] = true; + if (Debug == true) + std::clog << "with ID " << RlsFile->ID << " is valid" << std::endl; + + std::vector <pkgIndexFile *> const * const Indexes = (*i)->GetIndexFiles(); + std::copy_if(Indexes->begin(), Indexes->end(), std::back_inserter(Files), + [](pkgIndexFile const * const I) { return I->HasPackages(); }); + } + for (unsigned I = 0; I != Cache.HeaderP->ReleaseFileCount; ++I) + if (RlsVisited[I] == false) + { + if (Debug == true) + std::clog << "RlsFile with ID" << I << " wasn't visited" << std::endl; + return false; + } + + std::copy(Start, End, std::back_inserter(Files)); + + /* Now we check every index file, see if it is in the cache, + verify the IMS data and check that it is on the disk too.. */ + std::unique_ptr<bool[]> Visited(new bool[Cache.HeaderP->PackageFileCount]); + memset(Visited.get(),0,sizeof(Visited[0])*Cache.HeaderP->PackageFileCount); + for (std::vector<pkgIndexFile *>::const_reverse_iterator PkgFile = Files.rbegin(); PkgFile != Files.rend(); ++PkgFile) + { + if (Debug == true) + std::clog << "Checking PkgFile " << (*PkgFile)->Describe() << ": "; + if ((*PkgFile)->Exists() == false) + { + if (Debug == true) + std::clog << "file doesn't exist" << std::endl; + continue; + } + + // FindInCache is also expected to do an IMS check. + pkgCache::PkgFileIterator File = (*PkgFile)->FindInCache(Cache); + if (File.end() == true) + { + if (Debug == true) + std::clog << "FindInCache returned end-Pointer" << std::endl; + return false; + } + + Visited[File->ID] = true; + if (Debug == true) + std::clog << "with ID " << File->ID << " is valid" << std::endl; + } + + for (unsigned I = 0; I != Cache.HeaderP->PackageFileCount; I++) + if (Visited[I] == false) + { + if (Debug == true) + std::clog << "PkgFile with ID" << I << " wasn't visited" << std::endl; + return false; + } + + if (_error->PendingError() == true) + { + if (Debug == true) + { + std::clog << "Validity failed because of pending errors:" << std::endl; + _error->DumpErrors(std::clog, GlobalError::DEBUG, false); + } + return false; + } + + if (OutMap != 0) + *OutMap = Map.release(); + if (OutCache != 0) + *OutCache = CacheP.release(); + return true; +} + /*}}}*/ +// ComputeSize - Compute the total size of a bunch of files /*{{{*/ +// --------------------------------------------------------------------- +/* Size is kind of an abstract notion that is only used for the progress + meter */ +static map_filesize_t ComputeSize(pkgSourceList const * const List, FileIterator Start,FileIterator End) +{ + map_filesize_t TotalSize = 0; + if (List != NULL) + { + for (pkgSourceList::const_iterator i = List->begin(); i != List->end(); ++i) + { + std::vector <pkgIndexFile *> *Indexes = (*i)->GetIndexFiles(); + for (std::vector<pkgIndexFile *>::const_iterator j = Indexes->begin(); j != Indexes->end(); ++j) + if ((*j)->HasPackages() == true) + TotalSize += (*j)->Size(); + } + } + + for (; Start < End; ++Start) + { + if ((*Start)->HasPackages() == false) + continue; + TotalSize += (*Start)->Size(); + } + return TotalSize; +} + /*}}}*/ +// BuildCache - Merge the list of index files into the cache /*{{{*/ +static bool BuildCache(pkgCacheGenerator &Gen, + OpProgress * const Progress, + map_filesize_t &CurrentSize,map_filesize_t TotalSize, + pkgSourceList const * const List, + FileIterator const Start, FileIterator const End) +{ + bool mergeFailure = false; + + auto const indexFileMerge = [&](pkgIndexFile * const I) { + if (I->HasPackages() == false || mergeFailure) + return; + + if (I->Exists() == false) + return; + + if (I->FindInCache(Gen.GetCache()).end() == false) + { + _error->Warning("Duplicate sources.list entry %s", + I->Describe().c_str()); + return; + } + + map_filesize_t const Size = I->Size(); + if (Progress != NULL) + Progress->OverallProgress(CurrentSize, TotalSize, Size, _("Reading package lists")); + CurrentSize += Size; + + if (I->Merge(Gen,Progress) == false) + mergeFailure = true; + }; + + if (List != NULL) + { + for (pkgSourceList::const_iterator i = List->begin(); i != List->end(); ++i) + { + if ((*i)->FindInCache(Gen.GetCache(), false).end() == false) + { + _error->Warning("Duplicate sources.list entry %s", + (*i)->Describe().c_str()); + continue; + } + + if ((*i)->Merge(Gen, Progress) == false) + return false; + + std::vector <pkgIndexFile *> *Indexes = (*i)->GetIndexFiles(); + if (Indexes != NULL) + std::for_each(Indexes->begin(), Indexes->end(), indexFileMerge); + if (mergeFailure) + return false; + } + } + + if (Start != End) + { + Gen.SelectReleaseFile("", ""); + std::for_each(Start, End, indexFileMerge); + if (mergeFailure) + return false; + } + return true; +} + /*}}}*/ +// CacheGenerator::MakeStatusCache - Construct the status cache /*{{{*/ +// --------------------------------------------------------------------- +/* This makes sure that the status cache (the cache that has all + index files from the sources list and all local ones) is ready + to be mmaped. If OutMap is not zero then a MMap object representing + the cache will be stored there. This is pretty much mandatory if you + are using AllowMem. AllowMem lets the function be run as non-root + where it builds the cache 'fast' into a memory buffer. */ +static DynamicMMap* CreateDynamicMMap(FileFd * const CacheF, unsigned long Flags) +{ + map_filesize_t const MapStart = _config->FindI("APT::Cache-Start", APT_CACHE_START_DEFAULT); + map_filesize_t const MapGrow = _config->FindI("APT::Cache-Grow", 1*1024*1024); + map_filesize_t const MapLimit = _config->FindI("APT::Cache-Limit", 0); + Flags |= MMap::Moveable; + if (_config->FindB("APT::Cache-Fallback", false) == true) + Flags |= MMap::Fallback; + if (CacheF != NULL) + return new DynamicMMap(*CacheF, Flags, MapStart, MapGrow, MapLimit); + else + return new DynamicMMap(Flags, MapStart, MapGrow, MapLimit); +} +static bool writeBackMMapToFile(pkgCacheGenerator * const Gen, DynamicMMap * const Map, + std::string const &FileName) +{ + FileFd SCacheF(FileName, FileFd::WriteAtomic); + if (SCacheF.IsOpen() == false || SCacheF.Failed()) + return false; + + fchmod(SCacheF.Fd(),0644); + + // Write out the main data + if (SCacheF.Write(Map->Data(),Map->Size()) == false) + return _error->Error(_("IO Error saving source cache")); + + // Write out the proper header + Gen->GetCache().HeaderP->Dirty = false; + Gen->GetCache().HeaderP->CacheFileSize = Gen->GetCache().CacheHash(); + if (SCacheF.Seek(0) == false || + SCacheF.Write(Map->Data(),sizeof(*Gen->GetCache().HeaderP)) == false) + return _error->Error(_("IO Error saving source cache")); + Gen->GetCache().HeaderP->Dirty = true; + return true; +} +static bool loadBackMMapFromFile(std::unique_ptr<pkgCacheGenerator> &Gen, + std::unique_ptr<DynamicMMap> &Map, OpProgress * const Progress, FileFd &CacheF) +{ + Map.reset(CreateDynamicMMap(NULL, 0)); + if (unlikely(Map->validData()) == false) + return false; + if (CacheF.IsOpen() == false || CacheF.Seek(0) == false || CacheF.Failed()) + return false; + _error->PushToStack(); + uint32_t const alloc = Map->RawAllocate(CacheF.Size()); + bool const newError = _error->PendingError(); + _error->MergeWithStack(); + if (alloc == 0 && newError) + return false; + if (CacheF.Read((unsigned char *)Map->Data() + alloc, CacheF.Size()) == false) + return false; + Gen.reset(new pkgCacheGenerator(Map.get(),Progress)); + return Gen->Start(); +} +bool pkgCacheGenerator::MakeStatusCache(pkgSourceList &List,OpProgress *Progress, + MMap **OutMap,bool) +{ + return pkgCacheGenerator::MakeStatusCache(List, Progress, OutMap, nullptr, true); +} +bool pkgCacheGenerator::MakeStatusCache(pkgSourceList &List,OpProgress *Progress, + MMap **OutMap,pkgCache **OutCache, bool) +{ + // FIXME: deprecate the ignored AllowMem parameter + bool const Debug = _config->FindB("Debug::pkgCacheGen", false); + + std::vector<pkgIndexFile *> Files; + if (_system->AddStatusFiles(Files) == false) + return false; + + // Decide if we can write to the files.. + string const CacheFileName = _config->FindFile("Dir::Cache::pkgcache"); + string const SrcCacheFileName = _config->FindFile("Dir::Cache::srcpkgcache"); + + // ensure the cache directory exists + if (CacheFileName.empty() == false || SrcCacheFileName.empty() == false) + { + string dir = _config->FindDir("Dir::Cache"); + size_t const len = dir.size(); + if (len > 5 && dir.find("/apt/", len - 6, 5) == len - 5) + dir = dir.substr(0, len - 5); + if (CacheFileName.empty() == false) + CreateDirectory(dir, flNotFile(CacheFileName)); + if (SrcCacheFileName.empty() == false) + CreateDirectory(dir, flNotFile(SrcCacheFileName)); + } + + if (Progress != NULL) + Progress->OverallProgress(0,1,1,_("Reading package lists")); + + bool pkgcache_fine = false; + bool srcpkgcache_fine = false; + bool volatile_fine = List.GetVolatileFiles().empty(); + FileFd CacheFile; + if (CheckValidity(CacheFile, CacheFileName, List, Files.begin(), Files.end(), volatile_fine ? OutMap : NULL, + volatile_fine ? OutCache : NULL) == true) + { + if (Debug == true) + std::clog << "pkgcache.bin is valid - no need to build any cache" << std::endl; + pkgcache_fine = true; + srcpkgcache_fine = true; + } + + FileFd SrcCacheFile; + if (pkgcache_fine == false) + { + if (CheckValidity(SrcCacheFile, SrcCacheFileName, List, Files.end(), Files.end()) == true) + { + if (Debug == true) + std::clog << "srcpkgcache.bin is valid - it can be reused" << std::endl; + srcpkgcache_fine = true; + } + } + + if (volatile_fine == true && srcpkgcache_fine == true && pkgcache_fine == true) + { + if (Progress != NULL) + Progress->OverallProgress(1,1,1,_("Reading package lists")); + return true; + } + + bool Writeable = false; + if (srcpkgcache_fine == false || pkgcache_fine == false) + { + if (CacheFileName.empty() == false) + Writeable = access(flNotFile(CacheFileName).c_str(),W_OK) == 0; + else if (SrcCacheFileName.empty() == false) + Writeable = access(flNotFile(SrcCacheFileName).c_str(),W_OK) == 0; + + if (Debug == true) + std::clog << "Do we have write-access to the cache files? " << (Writeable ? "YES" : "NO") << std::endl; + } + + // At this point we know we need to construct something, so get storage ready + std::unique_ptr<DynamicMMap> Map(CreateDynamicMMap(NULL, 0)); + if (unlikely(Map->validData()) == false) + return false; + if (Debug == true) + std::clog << "Open memory Map (not filebased)" << std::endl; + + std::unique_ptr<pkgCacheGenerator> Gen{nullptr}; + map_filesize_t CurrentSize = 0; + std::vector<pkgIndexFile*> VolatileFiles = List.GetVolatileFiles(); + map_filesize_t TotalSize = ComputeSize(NULL, VolatileFiles.begin(), VolatileFiles.end()); + if (srcpkgcache_fine == true && pkgcache_fine == false) + { + if (Debug == true) + std::clog << "srcpkgcache.bin was valid - populate MMap with it" << std::endl; + if (loadBackMMapFromFile(Gen, Map, Progress, SrcCacheFile) == false) + return false; + srcpkgcache_fine = true; + TotalSize += ComputeSize(NULL, Files.begin(), Files.end()); + } + else if (srcpkgcache_fine == false) + { + if (Debug == true) + std::clog << "srcpkgcache.bin is NOT valid - rebuild" << std::endl; + Gen.reset(new pkgCacheGenerator(Map.get(),Progress)); + if (Gen->Start() == false) + return false; + + TotalSize += ComputeSize(&List, Files.begin(),Files.end()); + if (BuildCache(*Gen, Progress, CurrentSize, TotalSize, &List, + Files.end(),Files.end()) == false) + return false; + + if (Writeable == true && SrcCacheFileName.empty() == false) + if (writeBackMMapToFile(Gen.get(), Map.get(), SrcCacheFileName) == false) + return false; + } + + if (pkgcache_fine == false) + { + if (Debug == true) + std::clog << "Building status cache in pkgcache.bin now" << std::endl; + if (BuildCache(*Gen, Progress, CurrentSize, TotalSize, NULL, + Files.begin(), Files.end()) == false) + return false; + + if (Writeable == true && CacheFileName.empty() == false) + if (writeBackMMapToFile(Gen.get(), Map.get(), CacheFileName) == false) + return false; + } + + if (Debug == true) + std::clog << "Caches done. " << (volatile_fine ? "No volatile files, so we are done here." : "Now bring in the volatile files") << std::endl; + + if (volatile_fine == false) + { + if (Gen == nullptr) + { + if (Debug == true) + std::clog << "Populate new MMap with cachefile contents" << std::endl; + if (loadBackMMapFromFile(Gen, Map, Progress, CacheFile) == false) + return false; + } + + Files = List.GetVolatileFiles(); + if (BuildCache(*Gen, Progress, CurrentSize, TotalSize, NULL, + Files.begin(), Files.end()) == false) + return false; + } + + if (OutMap != nullptr) + *OutMap = Map.release(); + + if (Debug == true) + std::clog << "Everything is ready for shipping" << std::endl; + return true; +} + /*}}}*/ +// CacheGenerator::MakeOnlyStatusCache - Build only a status files cache/*{{{*/ +class APT_HIDDEN ScopedErrorMerge { +public: + ScopedErrorMerge() { _error->PushToStack(); } + ~ScopedErrorMerge() { _error->MergeWithStack(); } +}; +bool pkgCacheGenerator::MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap) +{ + std::vector<pkgIndexFile *> Files; + if (_system->AddStatusFiles(Files) == false) + return false; + + ScopedErrorMerge sem; + std::unique_ptr<DynamicMMap> Map(CreateDynamicMMap(NULL, 0)); + if (unlikely(Map->validData()) == false) + return false; + map_filesize_t CurrentSize = 0; + map_filesize_t TotalSize = 0; + TotalSize = ComputeSize(NULL, Files.begin(), Files.end()); + + // Build the status cache + if (Progress != NULL) + Progress->OverallProgress(0,1,1,_("Reading package lists")); + pkgCacheGenerator Gen(Map.get(),Progress); + if (Gen.Start() == false || _error->PendingError() == true) + return false; + if (BuildCache(Gen,Progress,CurrentSize,TotalSize, NULL, + Files.begin(), Files.end()) == false) + return false; + + if (_error->PendingError() == true) + return false; + *OutMap = Map.release(); + + return true; +} + /*}}}*/ +// IsDuplicateDescription /*{{{*/ +static bool IsDuplicateDescription(pkgCache &Cache, pkgCache::DescIterator Desc, + APT::StringView CurMd5, std::string const &CurLang) +{ + // Descriptions in the same link-list have all the same md5 + if (Desc.end() == true || Cache.ViewString(Desc->md5sum) != CurMd5) + return false; + for (; Desc.end() == false; ++Desc) + if (Desc.LanguageCode() == CurLang) + return true; + return false; +} + /*}}}*/ + +pkgCacheListParser::pkgCacheListParser() : Owner(NULL), OldDepLast(NULL), d(NULL) {} +pkgCacheListParser::~pkgCacheListParser() {} |