// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: pkgcachegen.cc,v 1.12 1998/07/21 05:33:19 jgg Exp $
+// $Id: pkgcachegen.cc,v 1.53.2.1 2003/12/24 23:09:17 mdz Exp $
/* ######################################################################
Package Cache Generator - Generator for the cache structure.
#pragma implementation "apt-pkg/pkgcachegen.h"
#endif
+#define APT_COMPATIBILITY 986
+
#include <apt-pkg/pkgcachegen.h>
#include <apt-pkg/error.h>
#include <apt-pkg/version.h>
-#include <strutl.h>
+#include <apt-pkg/progress.h>
+#include <apt-pkg/sourcelist.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/sptr.h>
+#include <apt-pkg/pkgsystem.h>
+
+#include <apti18n.h>
+
+#include <vector>
#include <sys/stat.h>
#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <system.h>
/*}}}*/
+typedef vector<pkgIndexFile *>::iterator FileIterator;
// CacheGenerator::pkgCacheGenerator - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* We set the diry flag and make sure that is written to the disk */
-pkgCacheGenerator::pkgCacheGenerator(DynamicMMap &Map,OpProgress &Prog) :
- Map(Map), Cache(Map), Progress(Prog)
+pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
+ Map(*pMap), Cache(pMap,false), Progress(Prog),
+ FoundFileDeps(0)
{
+ CurrentFile = 0;
+ memset(UniqHash,0,sizeof(UniqHash));
+
if (_error->PendingError() == true)
return;
-
+
if (Map.Size() == 0)
{
+ // Setup the map interface..
+ Cache.HeaderP = (pkgCache::Header *)Map.Data();
Map.RawAllocate(sizeof(pkgCache::Header));
+ Map.UsePools(*Cache.HeaderP->Pools,sizeof(Cache.HeaderP->Pools)/sizeof(Cache.HeaderP->Pools[0]));
+
+ // Starting header
*Cache.HeaderP = pkgCache::Header();
+ Cache.HeaderP->VerSysName = Map.WriteString(_system->VS->Label);
+ Cache.HeaderP->Architecture = Map.WriteString(_config->Find("APT::Architecture"));
+ 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)
+ {
+ _error->Error(_("Cache has an incompatible versioning system"));
+ return;
+ }
+ }
+
Cache.HeaderP->Dirty = true;
Map.Sync(0,sizeof(pkgCache::Header));
- Map.UsePools(*Cache.HeaderP->Pools,sizeof(Cache.HeaderP->Pools)/sizeof(Cache.HeaderP->Pools[0]));
}
/*}}}*/
// CacheGenerator::~pkgCacheGenerator - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* 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)
+bool pkgCacheGenerator::MergeList(ListParser &List,
+ pkgCache::VerIterator *OutVer)
{
List.Owner = this;
+ unsigned int Counter = 0;
while (List.Step() == true)
{
// Get a pointer to the package structure
string PackageName = List.Package();
- pkgCache::PkgIterator Pkg;
- if (NewPackage(Pkg,PackageName) == false)
+ if (PackageName.empty() == true)
return false;
- Progress.Progress(List.Offset());
+ pkgCache::PkgIterator Pkg;
+ if (NewPackage(Pkg,PackageName) == false)
+ return _error->Error(_("Error occured while processing %s (NewPackage)"),PackageName.c_str());
+ Counter++;
+ if (Counter % 100 == 0 && Progress != 0)
+ Progress->Progress(List.Offset());
+
/* Get a pointer to the version structure. We know the list is sorted
so we use that fact in the search. Insertion of new versions is
done with correct sorting */
string Version = List.Version();
if (Version.empty() == true)
{
+ // Find the right version to write the description
+ MD5SumValue CurMd5 = List.Description_md5();
+ pkgCache::VerIterator Ver = Pkg.VersionList();
+ map_ptrloc *LastVer = &Pkg->VersionList;
+
+ for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
+ {
+ pkgCache::DescIterator Desc = Ver.DescriptionList();
+ map_ptrloc *LastDesc = &Ver->DescriptionList;
+
+ for (; Desc.end() == false; LastDesc = &Desc->NextDesc, Desc++)
+ if (MD5SumValue(Desc.md5()) == CurMd5) {
+ // Add new description
+ *LastDesc = NewDescription(Desc, List.DescriptionLanguage(), CurMd5, *LastDesc);
+ Desc->ParentPkg = Pkg.Index();
+
+ if (NewFileDesc(Desc,List) == false)
+ return _error->Error(_("Error occured while processing %s (NewFileDesc1)"),PackageName.c_str());
+ break;
+ }
+ }
+
if (List.UsePackage(Pkg,pkgCache::VerIterator(Cache)) == false)
- return false;
+ return _error->Error(_("Error occured while processing %s (UsePackage1)"),
+ PackageName.c_str());
continue;
}
pkgCache::VerIterator Ver = Pkg.VersionList();
- unsigned long *Last = &Pkg->VersionList;
+ map_ptrloc *LastVer = &Pkg->VersionList;
int Res = 1;
- for (; Ver.end() == false; Last = &Ver->NextVer, Ver++)
+ for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
{
- Res = pkgVersionCompare(Version.begin(),Version.end(),Ver.VerStr(),
- Ver.VerStr() + strlen(Ver.VerStr()));
+ Res = Cache.VS->CmpVersion(Version,Ver.VerStr());
if (Res >= 0)
break;
}
/* We already have a version for this item, record that we
saw it */
- if (Res == 0)
+ unsigned long Hash = List.VersionHash();
+ if (Res == 0 && Ver->Hash == Hash)
{
if (List.UsePackage(Pkg,Ver) == false)
- return false;
-
+ return _error->Error(_("Error occured while processing %s (UsePackage2)"),
+ PackageName.c_str());
+
if (NewFileVer(Ver,List) == false)
- return false;
+ return _error->Error(_("Error occured while processing %s (NewFileVer1)"),
+ PackageName.c_str());
+
+ // Read only a single record and return
+ if (OutVer != 0)
+ {
+ *OutVer = Ver;
+ FoundFileDeps |= List.HasFileDeps();
+ return true;
+ }
continue;
}
+ // Skip to the end of the same version set.
+ if (Res == 0)
+ {
+ for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
+ {
+ Res = Cache.VS->CmpVersion(Version,Ver.VerStr());
+ if (Res != 0)
+ break;
+ }
+ }
+
// Add a new version
- *Last = NewVersion(Ver,Version,*Last);
+ *LastVer = NewVersion(Ver,Version,*LastVer);
Ver->ParentPkg = Pkg.Index();
+ Ver->Hash = Hash;
+
if (List.NewVersion(Ver) == false)
- return false;
+ return _error->Error(_("Error occured while processing %s (NewVersion1)"),
+ PackageName.c_str());
if (List.UsePackage(Pkg,Ver) == false)
- return false;
+ return _error->Error(_("Error occured while processing %s (UsePackage3)"),
+ PackageName.c_str());
if (NewFileVer(Ver,List) == false)
+ return _error->Error(_("Error occured while processing %s (NewVersion2)"),
+ PackageName.c_str());
+
+ // Read only a single record and return
+ if (OutVer != 0)
+ {
+ *OutVer = Ver;
+ FoundFileDeps |= List.HasFileDeps();
+ return true;
+ }
+
+ /* Record the Description data. Description data always exist in
+ Packages and Translation-* files. */
+ pkgCache::DescIterator Desc = Ver.DescriptionList();
+ map_ptrloc *LastDesc = &Ver->DescriptionList;
+
+ // Skip to the end of description set
+ for (; Desc.end() == false; LastDesc = &Desc->NextDesc, Desc++);
+
+ // Add new description
+ *LastDesc = NewDescription(Desc, List.DescriptionLanguage(), List.Description_md5(), *LastDesc);
+ Desc->ParentPkg = Pkg.Index();
+
+ if (NewFileDesc(Desc,List) == false)
+ return _error->Error(_("Error occured while processing %s (NewFileDesc2)"),PackageName.c_str());
+ }
+
+ FoundFileDeps |= List.HasFileDeps();
+
+ if (Cache.HeaderP->PackageCount >= (1ULL<<sizeof(Cache.PkgP->ID)*8)-1)
+ return _error->Error(_("Wow, you exceeded the number of package "
+ "names this APT is capable of."));
+ if (Cache.HeaderP->VersionCount >= (1ULL<<(sizeof(Cache.VerP->ID)*8))-1)
+ return _error->Error(_("Wow, you exceeded the number of versions "
+ "this APT is capable of."));
+ if (Cache.HeaderP->DescriptionCount >= (1ULL<<(sizeof(Cache.DescP->ID)*8))-1)
+ return _error->Error(_("Wow, you exceeded the number of descriptions "
+ "this APT is capable of."));
+ if (Cache.HeaderP->DependsCount >= (1ULL<<(sizeof(Cache.DepP->ID)*8))-1ULL)
+ return _error->Error(_("Wow, you exceeded the number of dependencies "
+ "this APT is capable of."));
+ return true;
+}
+ /*}}}*/
+// CacheGenerator::MergeFileProvides - Merge file provides /*{{{*/
+// ---------------------------------------------------------------------
+/* If we found any file depends while parsing the main list we need to
+ resolve them. Since it is undesired to load the entire list of files
+ into the cache as virtual packages we do a two stage effort. MergeList
+ identifies the file depends and this creates Provdies for them by
+ re-parsing all the indexs. */
+bool pkgCacheGenerator::MergeFileProvides(ListParser &List)
+{
+ List.Owner = this;
+
+ unsigned int Counter = 0;
+ while (List.Step() == true)
+ {
+ string PackageName = List.Package();
+ if (PackageName.empty() == true)
return false;
+ string Version = List.Version();
+ if (Version.empty() == true)
+ continue;
+
+ pkgCache::PkgIterator Pkg = Cache.FindPkg(PackageName);
+ if (Pkg.end() == true)
+ return _error->Error(_("Error occured while processing %s (FindPkg)"),
+ PackageName.c_str());
+ Counter++;
+ if (Counter % 100 == 0 && Progress != 0)
+ Progress->Progress(List.Offset());
+
+ unsigned long Hash = List.VersionHash();
+ pkgCache::VerIterator Ver = Pkg.VersionList();
+ for (; Ver.end() == false; Ver++)
+ {
+ if (Ver->Hash == Hash && Version.c_str() == Ver.VerStr())
+ {
+ if (List.CollectFileProvides(Cache,Ver) == false)
+ return _error->Error(_("Error occured while processing %s (CollectFileProvides)"),PackageName.c_str());
+ break;
+ }
+ }
+
+ if (Ver.end() == true)
+ _error->Warning(_("Package %s %s was not found while processing file dependencies"),PackageName.c_str(),Version.c_str());
}
return true;
Pkg = Cache.FindPkg(Name);
if (Pkg.end() == false)
return true;
-
+
// Get a structure
unsigned long Package = Map.Allocate(sizeof(pkgCache::Package));
if (Package == 0)
bool pkgCacheGenerator::NewFileVer(pkgCache::VerIterator &Ver,
ListParser &List)
{
+ if (CurrentFile == 0)
+ return true;
+
// Get a structure
unsigned long VerFile = Map.Allocate(sizeof(pkgCache::VerFile));
if (VerFile == 0)
pkgCache::VerFileIterator VF(Cache,Cache.VerFileP + VerFile);
VF->File = CurrentFile - Cache.PkgFileP;
- VF->NextFile = Ver->FileList;
- Ver->FileList = VF.Index();
+
+ // Link it to the end of the list
+ map_ptrloc *Last = &Ver->FileList;
+ for (pkgCache::VerFileIterator V = Ver.FileList(); V.end() == false; V++)
+ Last = &V->NextFile;
+ VF->NextFile = *Last;
+ *Last = VF.Index();
+
VF->Offset = List.Offset();
VF->Size = List.Size();
if (Cache.HeaderP->MaxVerFileSize < VF->Size)
Cache.HeaderP->MaxVerFileSize = VF->Size;
+ Cache.HeaderP->VerFileCount++;
+
return true;
}
/*}}}*/
return Version;
}
/*}}}*/
+// CacheGenerator::NewFileDesc - Create a new File<->Desc association /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool pkgCacheGenerator::NewFileDesc(pkgCache::DescIterator &Desc,
+ ListParser &List)
+{
+ if (CurrentFile == 0)
+ return true;
+
+ // Get a structure
+ unsigned long DescFile = Map.Allocate(sizeof(pkgCache::DescFile));
+ if (DescFile == 0)
+ return 0;
+
+ pkgCache::DescFileIterator DF(Cache,Cache.DescFileP + DescFile);
+ DF->File = CurrentFile - Cache.PkgFileP;
+
+ // Link it to the end of the list
+ map_ptrloc *Last = &Desc->FileList;
+ for (pkgCache::DescFileIterator D = Desc.FileList(); D.end() == false; D++)
+ Last = &D->NextFile;
+ DF->NextFile = *Last;
+ *Last = DF.Index();
+
+ 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_ptrloc pkgCacheGenerator::NewDescription(pkgCache::DescIterator &Desc,
+ const string &Lang, const MD5SumValue &md5sum,
+ map_ptrloc Next)
+{
+ // Get a structure
+ map_ptrloc Description = Map.Allocate(sizeof(pkgCache::Description));
+ if (Description == 0)
+ return 0;
+
+ // Fill it in
+ Desc = pkgCache::DescIterator(Cache,Cache.DescP + Description);
+ Desc->NextDesc = Next;
+ Desc->ID = Cache.HeaderP->DescriptionCount++;
+ Desc->language_code = Map.WriteString(Lang);
+ Desc->md5sum = Map.WriteString(md5sum.Value());
+
+ return Description;
+}
+ /*}}}*/
// ListParser::NewDepends - Create a dependency element /*{{{*/
// ---------------------------------------------------------------------
/* This creates a dependency element in the tree. It is linked to the
// Probe the reverse dependency list for a version string that matches
if (Version.empty() == false)
{
- for (pkgCache::DepIterator I = Pkg.RevDependsList(); I.end() == false; I++)
+/* for (pkgCache::DepIterator I = Pkg.RevDependsList(); I.end() == false; I++)
if (I->Version != 0 && I.TargetVer() == Version)
- Dep->Version = I->Version;
+ Dep->Version = I->Version;*/
if (Dep->Version == 0)
if ((Dep->Version = WriteString(Version)) == 0)
return false;
}
-
+
// Link it to the package
Dep->Package = Pkg.Index();
Dep->NextRevDepends = Pkg->RevDepends;
Pkg->RevDepends = Dep.Index();
- // Link it to the version (at the end of the list)
- unsigned long *Last = &Ver->DependsList;
- for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; D++)
- Last = &D->NextDepends;
- Dep->NextDepends = *Last;
- *Last = Dep.Index();
+ /* Link it to the version (at the end of the list)
+ Caching the old end point speeds up generation substantially */
+ if (OldDepVer != Ver)
+ {
+ OldDepLast = &Ver->DependsList;
+ for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; D++)
+ OldDepLast = &D->NextDepends;
+ OldDepVer = Ver;
+ }
+
+ // Is it a file dependency?
+ if (PackageName[0] == '/')
+ FoundFileDeps = true;
+ Dep->NextDepends = *OldDepLast;
+ *OldDepLast = Dep.Index();
+ OldDepLast = &Dep->NextDepends;
+
return true;
}
/*}}}*/
unsigned long Provides = Owner->Map.Allocate(sizeof(pkgCache::Provides));
if (Provides == 0)
return false;
+ Cache.HeaderP->ProvidesCount++;
// Fill it in
pkgCache::PrvIterator Prv(Cache,Cache.ProvideP + Provides,Cache.PkgP);
Prv->Version = Ver.Index();
Prv->NextPkgProv = Ver->ProvidesList;
Ver->ProvidesList = Prv.Index();
- if (Version.empty() == false && (Prv->Version = WriteString(Version)) == 0)
+ if (Version.empty() == false && (Prv->ProvideVersion = WriteString(Version)) == 0)
return false;
// Locate the target package
// CacheGenerator::SelectFile - Select the current file being parsed /*{{{*/
// ---------------------------------------------------------------------
/* This is used to select which file is to be associated with all newly
- added versions. */
-bool pkgCacheGenerator::SelectFile(string File,unsigned long Flags)
+ added versions. The caller is responsible for setting the IMS fields. */
+bool pkgCacheGenerator::SelectFile(string File,string Site,
+ const pkgIndexFile &Index,
+ unsigned long Flags)
{
- struct stat Buf;
- if (stat(File.c_str(),&Buf) == -1)
- return _error->Errno("stat","Couldn't stat ",File.c_str());
-
// Get some space for the structure
CurrentFile = Cache.PkgFileP + Map.Allocate(sizeof(*CurrentFile));
if (CurrentFile == Cache.PkgFileP)
// Fill it in
CurrentFile->FileName = Map.WriteString(File);
- CurrentFile->Size = Buf.st_size;
- CurrentFile->mtime = Buf.st_mtime;
+ CurrentFile->Site = WriteUniqString(Site);
CurrentFile->NextFile = Cache.HeaderP->FileList;
CurrentFile->Flags = Flags;
+ CurrentFile->ID = Cache.HeaderP->PackageFileCount;
+ CurrentFile->IndexType = WriteUniqString(Index.GetType()->Label);
PkgFileName = File;
Cache.HeaderP->FileList = CurrentFile - Cache.PkgFileP;
-
+ Cache.HeaderP->PackageFileCount++;
+
if (CurrentFile->FileName == 0)
return false;
- Progress.SubProgress(Buf.st_size,File);
+ if (Progress != 0)
+ Progress->SubProgress(Index.Size());
return true;
}
/*}}}*/
unsigned long pkgCacheGenerator::WriteUniqString(const char *S,
unsigned int Size)
{
+ /* We use a very small transient hash table here, this speeds up generation
+ by a fair amount on slower machines */
+ pkgCache::StringItem *&Bucket = UniqHash[(S[0]*5 + S[1]) % _count(UniqHash)];
+ if (Bucket != 0 &&
+ stringcmp(S,S+Size,Cache.StrP + Bucket->String) == 0)
+ return Bucket->String;
+
// Search for an insertion point
pkgCache::StringItem *I = Cache.StringItemP + Cache.HeaderP->StringList;
int Res = 1;
- unsigned long *Last = &Cache.HeaderP->StringList;
+ map_ptrloc *Last = &Cache.HeaderP->StringList;
for (; I != Cache.StringItemP; Last = &I->NextItem,
I = Cache.StringItemP + I->NextItem)
{
// Match
if (Res == 0)
+ {
+ Bucket = I;
return I->String;
+ }
// Get a structure
unsigned long Item = Map.Allocate(sizeof(pkgCache::StringItem));
if (ItemP->String == 0)
return 0;
+ Bucket = ItemP;
return ItemP->String;
}
/*}}}*/
+
+// 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. */
+static bool CheckValidity(string CacheFile, FileIterator Start,
+ FileIterator End,MMap **OutMap = 0)
+{
+ // No file, certainly invalid
+ if (CacheFile.empty() == true || FileExists(CacheFile) == false)
+ return false;
+
+ // Map it
+ FileFd CacheF(CacheFile,FileFd::ReadOnly);
+ SPtr<MMap> Map = new MMap(CacheF,MMap::Public | MMap::ReadOnly);
+ pkgCache Cache(Map);
+ if (_error->PendingError() == true || Map->Size() == 0)
+ {
+ _error->Discard();
+ return false;
+ }
+
+ /* 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.. */
+ SPtrArray<bool> Visited = new bool[Cache.HeaderP->PackageFileCount];
+ memset(Visited,0,sizeof(*Visited)*Cache.HeaderP->PackageFileCount);
+ for (; Start != End; Start++)
+ {
+ if ((*Start)->HasPackages() == false)
+ continue;
+
+ if ((*Start)->Exists() == false)
+ {
+ _error->WarningE("stat",_("Couldn't stat source package list %s"),
+ (*Start)->Describe().c_str());
+ continue;
+ }
+
+ // FindInCache is also expected to do an IMS check.
+ pkgCache::PkgFileIterator File = (*Start)->FindInCache(Cache);
+ if (File.end() == true)
+ return false;
+
+ Visited[File->ID] = true;
+ }
+
+ for (unsigned I = 0; I != Cache.HeaderP->PackageFileCount; I++)
+ if (Visited[I] == false)
+ return false;
+
+ if (_error->PendingError() == true)
+ {
+ _error->Discard();
+ return false;
+ }
+
+ if (OutMap != 0)
+ *OutMap = Map.UnGuard();
+ 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 unsigned long ComputeSize(FileIterator Start,FileIterator End)
+{
+ unsigned long TotalSize = 0;
+ 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 &Progress,
+ unsigned long &CurrentSize,unsigned long TotalSize,
+ FileIterator Start, FileIterator End)
+{
+ FileIterator I;
+ for (I = Start; I != End; I++)
+ {
+ if ((*I)->HasPackages() == false)
+ continue;
+
+ if ((*I)->Exists() == false)
+ continue;
+
+ if ((*I)->FindInCache(Gen.GetCache()).end() == false)
+ {
+ _error->Warning("Duplicate sources.list entry %s",
+ (*I)->Describe().c_str());
+ continue;
+ }
+
+ unsigned long Size = (*I)->Size();
+ Progress.OverallProgress(CurrentSize,TotalSize,Size,_("Reading Package Lists"));
+ CurrentSize += Size;
+
+ if ((*I)->Merge(Gen,Progress) == false)
+ return false;
+ }
+
+ if (Gen.HasFileDeps() == true)
+ {
+ Progress.Done();
+ TotalSize = ComputeSize(Start, End);
+ CurrentSize = 0;
+ for (I = Start; I != End; I++)
+ {
+ unsigned long Size = (*I)->Size();
+ Progress.OverallProgress(CurrentSize,TotalSize,Size,_("Collecting File Provides"));
+ CurrentSize += Size;
+ if ((*I)->MergeFileProvides(Gen,Progress) == false)
+ return false;
+ }
+ }
+
+ return true;
+}
+ /*}}}*/
+// 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 mandetory if you
+ are using AllowMem. AllowMem lets the function be run as non-root
+ where it builds the cache 'fast' into a memory buffer. */
+bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
+ MMap **OutMap,bool AllowMem)
+{
+ unsigned long MapSize = _config->FindI("APT::Cache-Limit",12*1024*1024);
+
+ vector<pkgIndexFile *> Files;
+ for (vector<metaIndex *>::const_iterator i = List.begin();
+ i != List.end();
+ i++)
+ {
+ vector <pkgIndexFile *> *Indexes = (*i)->GetIndexFiles();
+ for (vector<pkgIndexFile *>::const_iterator j = Indexes->begin();
+ j != Indexes->end();
+ j++)
+ Files.push_back (*j);
+ }
+
+ unsigned long EndOfSource = Files.size();
+ if (_system->AddStatusFiles(Files) == false)
+ return false;
+
+ // Decide if we can write to the files..
+ string CacheFile = _config->FindFile("Dir::Cache::pkgcache");
+ string SrcCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
+
+ // Decide if we can write to the cache
+ bool Writeable = false;
+ if (CacheFile.empty() == false)
+ Writeable = access(flNotFile(CacheFile).c_str(),W_OK) == 0;
+ else
+ if (SrcCacheFile.empty() == false)
+ Writeable = access(flNotFile(SrcCacheFile).c_str(),W_OK) == 0;
+
+ if (Writeable == false && AllowMem == false && CacheFile.empty() == false)
+ return _error->Error(_("Unable to write to %s"),flNotFile(CacheFile).c_str());
+
+ Progress.OverallProgress(0,1,1,_("Reading Package Lists"));
+
+ // Cache is OK, Fin.
+ if (CheckValidity(CacheFile,Files.begin(),Files.end(),OutMap) == true)
+ {
+ Progress.OverallProgress(1,1,1,_("Reading Package Lists"));
+ return true;
+ }
+
+ /* At this point we know we need to reconstruct the package cache,
+ begin. */
+ SPtr<FileFd> CacheF;
+ SPtr<DynamicMMap> Map;
+ if (Writeable == true && CacheFile.empty() == false)
+ {
+ unlink(CacheFile.c_str());
+ CacheF = new FileFd(CacheFile,FileFd::WriteEmpty);
+ fchmod(CacheF->Fd(),0644);
+ Map = new DynamicMMap(*CacheF,MMap::Public,MapSize);
+ if (_error->PendingError() == true)
+ return false;
+ }
+ else
+ {
+ // Just build it in memory..
+ Map = new DynamicMMap(MMap::Public,MapSize);
+ }
+
+ // Lets try the source cache.
+ unsigned long CurrentSize = 0;
+ unsigned long TotalSize = 0;
+ if (CheckValidity(SrcCacheFile,Files.begin(),
+ Files.begin()+EndOfSource) == true)
+ {
+ // Preload the map with the source cache
+ FileFd SCacheF(SrcCacheFile,FileFd::ReadOnly);
+ if (SCacheF.Read((unsigned char *)Map->Data() + Map->RawAllocate(SCacheF.Size()),
+ SCacheF.Size()) == false)
+ return false;
+
+ TotalSize = ComputeSize(Files.begin()+EndOfSource,Files.end());
+
+ // Build the status cache
+ pkgCacheGenerator Gen(Map.Get(),&Progress);
+ if (_error->PendingError() == true)
+ return false;
+ if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
+ Files.begin()+EndOfSource,Files.end()) == false)
+ return false;
+ }
+ else
+ {
+ TotalSize = ComputeSize(Files.begin(),Files.end());
+
+ // Build the source cache
+ pkgCacheGenerator Gen(Map.Get(),&Progress);
+ if (_error->PendingError() == true)
+ return false;
+ if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
+ Files.begin(),Files.begin()+EndOfSource) == false)
+ return false;
+
+ // Write it back
+ if (Writeable == true && SrcCacheFile.empty() == false)
+ {
+ FileFd SCacheF(SrcCacheFile,FileFd::WriteEmpty);
+ if (_error->PendingError() == true)
+ 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"));
+ SCacheF.Sync();
+
+ // Write out the proper header
+ Gen.GetCache().HeaderP->Dirty = false;
+ 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;
+ SCacheF.Sync();
+ }
+
+ // Build the status cache
+ if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
+ Files.begin()+EndOfSource,Files.end()) == false)
+ return false;
+ }
+
+ if (_error->PendingError() == true)
+ return false;
+ if (OutMap != 0)
+ {
+ if (CacheF != 0)
+ {
+ delete Map.UnGuard();
+ *OutMap = new MMap(*CacheF,MMap::Public | MMap::ReadOnly);
+ }
+ else
+ {
+ *OutMap = Map.UnGuard();
+ }
+ }
+
+ return true;
+}
+ /*}}}*/
+// MakeOnlyStatusCache - Build a cache with just the status files /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap)
+{
+ unsigned long MapSize = _config->FindI("APT::Cache-Limit",8*1024*1024);
+ vector<pkgIndexFile *> Files;
+ unsigned long EndOfSource = Files.size();
+ if (_system->AddStatusFiles(Files) == false)
+ return false;
+
+ SPtr<DynamicMMap> Map;
+ Map = new DynamicMMap(MMap::Public,MapSize);
+ unsigned long CurrentSize = 0;
+ unsigned long TotalSize = 0;
+
+ TotalSize = ComputeSize(Files.begin()+EndOfSource,Files.end());
+
+ // Build the status cache
+ Progress.OverallProgress(0,1,1,_("Reading Package Lists"));
+ pkgCacheGenerator Gen(Map.Get(),&Progress);
+ if (_error->PendingError() == true)
+ return false;
+ if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
+ Files.begin()+EndOfSource,Files.end()) == false)
+ return false;
+
+ if (_error->PendingError() == true)
+ return false;
+ *OutMap = Map.UnGuard();
+
+ return true;
+}
+ /*}}}*/
projects / apt.git / blobdiff