cmdline/apt-cache.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-cache.cc,v 1.72 2004/04/30 04:34:03 mdz Exp $
   4 /* ######################################################################
   5
   6    apt-cache - Manages the cache files
   7
   8    apt-cache provides some functions fo manipulating the cache files.
   9    It uses the command line interface common to all the APT tools.
  10
  11    Returns 100 on failure, 0 on success.
  12
  13    ##################################################################### */
  14                                                                         /*}}}*/
  15 // Include Files                                                        /*{{{*/
  16 #include<config.h>
  17
  18 #include <apt-pkg/algorithms.h>
  19 #include <apt-pkg/cachefile.h>
  20 #include <apt-pkg/cacheset.h>
  21 #include <apt-pkg/cmndline.h>
  22 #include <apt-pkg/error.h>
  23 #include <apt-pkg/fileutl.h>
  24 #include <apt-pkg/indexfile.h>
  25 #include <apt-pkg/init.h>
  26 #include <apt-pkg/metaindex.h>
  27 #include <apt-pkg/pkgrecords.h>
  28 #include <apt-pkg/pkgsystem.h>
  29 #include <apt-pkg/policy.h>
  30 #include <apt-pkg/progress.h>
  31 #include <apt-pkg/sourcelist.h>
  32 #include <apt-pkg/sptr.h>
  33 #include <apt-pkg/srcrecords.h>
  34 #include <apt-pkg/strutl.h>
  35 #include <apt-pkg/tagfile.h>
  36 #include <apt-pkg/version.h>
  37 #include <apt-pkg/cacheiterators.h>
  38 #include <apt-pkg/configuration.h>
  39 #include <apt-pkg/depcache.h>
  40 #include <apt-pkg/macros.h>
  41 #include <apt-pkg/mmap.h>
  42 #include <apt-pkg/pkgcache.h>
  43
  44 #include <apt-private/private-cacheset.h>
  45 #include <apt-private/private-cmndline.h>
  46 #include <apt-private/private-depends.h>
  47 #include <apt-private/private-show.h>
  48 #include <apt-private/private-search.h>
  49 #include <apt-private/private-unmet.h>
  50 #include <apt-private/private-main.h>
  51
  52 #include <regex.h>
  53 #include <stddef.h>
  54 #include <stdio.h>
  55 #include <stdlib.h>
  56 #include <unistd.h>
  57 #include <algorithm>
  58 #include <cstring>
  59 #include <iomanip>
  60 #include <iostream>
  61 #include <list>
  62 #include <map>
  63 #include <set>
  64 #include <string>
  65 #include <vector>
  66
  67 #include <apti18n.h>
  68                                                                         /*}}}*/
  69
  70 using namespace std;
  71
  72 // DumpPackage - Show a dump of a package record                        /*{{{*/
  73 // ---------------------------------------------------------------------
  74 /* */
  75 static bool DumpPackage(CommandLine &CmdL)
  76 {
  77    pkgCacheFile CacheFile;
  78    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
  79    APT::PackageList pkgset = APT::PackageList::FromCommandLine(CacheFile, CmdL.FileList + 1, helper);
  80
  81    for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
  82    {
  83       cout << "Package: " << Pkg.FullName(true) << endl;
  84       cout << "Versions: " << endl;
  85       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; ++Cur)
  86       {
  87          cout << Cur.VerStr();
  88          for (pkgCache::VerFileIterator Vf = Cur.FileList(); Vf.end() == false; ++Vf)
  89             cout << " (" << Vf.File().FileName() << ")";
  90          cout << endl;
  91          for (pkgCache::DescIterator D = Cur.DescriptionList(); D.end() == false; ++D)
  92          {
  93             cout << " Description Language: " << D.LanguageCode() << endl
  94                  << "                 File: " << D.FileList().File().FileName() << endl
  95                  << "                  MD5: " << D.md5() << endl;
  96          }
  97          cout << endl;
  98       }
  99
 100       cout << endl;
 101
 102       cout << "Reverse Depends: " << endl;
 103       for (pkgCache::DepIterator D = Pkg.RevDependsList(); D.end() != true; ++D)
 104       {
 105          cout << "  " << D.ParentPkg().FullName(true) << ',' << D.TargetPkg().FullName(true);
 106          if (D->Version != 0)
 107             cout << ' ' << DeNull(D.TargetVer()) << endl;
 108          else
 109             cout << endl;
 110       }
 111
 112       cout << "Dependencies: " << endl;
 113       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; ++Cur)
 114       {
 115          cout << Cur.VerStr() << " - ";
 116          for (pkgCache::DepIterator Dep = Cur.DependsList(); Dep.end() != true; ++Dep)
 117             cout << Dep.TargetPkg().FullName(true) << " (" << (int)Dep->CompareOp << " " << DeNull(Dep.TargetVer()) << ") ";
 118          cout << endl;
 119       }
 120
 121       cout << "Provides: " << endl;
 122       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; ++Cur)
 123       {
 124          cout << Cur.VerStr() << " - ";
 125          for (pkgCache::PrvIterator Prv = Cur.ProvidesList(); Prv.end() != true; ++Prv)
 126             cout << Prv.ParentPkg().FullName(true) << " (= " << (Prv->ProvideVersion == 0 ? "" : Prv.ProvideVersion()) << ") ";
 127          cout << endl;
 128       }
 129       cout << "Reverse Provides: " << endl;
 130       for (pkgCache::PrvIterator Prv = Pkg.ProvidesList(); Prv.end() != true; ++Prv)
 131          cout << Prv.OwnerPkg().FullName(true) << " " << Prv.OwnerVer().VerStr()  << " (= " << (Prv->ProvideVersion == 0 ? "" : Prv.ProvideVersion()) << ")"<< endl;
 132    }
 133
 134    return true;
 135 }
 136                                                                         /*}}}*/
 137 // ShowHashTableStats - Show stats about a hashtable                    /*{{{*/
 138 // ---------------------------------------------------------------------
 139 /* */
 140 static map_pointer_t PackageNext(pkgCache::Package const * const P) { return P->NextPackage; }
 141 static map_pointer_t GroupNext(pkgCache::Group const * const G) { return G->Next; }
 142 template<class T>
 143 static void ShowHashTableStats(std::string Type,
 144                                T *StartP,
 145                                map_pointer_t *Hashtable,
 146                                unsigned long Size,
 147                                map_pointer_t(*Next)(T const * const))
 148 {
 149    // hashtable stats for the HashTable
 150    unsigned long NumBuckets = Size;
 151    unsigned long UsedBuckets = 0;
 152    unsigned long UnusedBuckets = 0;
 153    unsigned long LongestBucket = 0;
 154    unsigned long ShortestBucket = NumBuckets;
 155    unsigned long Entries = 0;
 156    for (unsigned int i=0; i < NumBuckets; ++i)
 157    {
 158       T *P = StartP + Hashtable[i];
 159       if(P == 0 || P == StartP)
 160       {
 161          ++UnusedBuckets;
 162          continue;
 163       }
 164       ++UsedBuckets;
 165       unsigned long ThisBucketSize = 0;
 166       for (; P != StartP; P = StartP + Next(P))
 167          ++ThisBucketSize;
 168       Entries += ThisBucketSize;
 169       LongestBucket = std::max(ThisBucketSize, LongestBucket);
 170       ShortestBucket = std::min(ThisBucketSize, ShortestBucket);
 171    }
 172    cout << "Total buckets in " << Type << ": " << NumBuckets << std::endl;
 173    cout << "  Unused: " << UnusedBuckets << std::endl;
 174    cout << "  Used: " << UsedBuckets  << std::endl;
 175    cout << "  Average entries: " << Entries/(double)NumBuckets << std::endl;
 176    cout << "  Longest: " << LongestBucket << std::endl;
 177    cout << "  Shortest: " << ShortestBucket << std::endl;
 178 }
 179                                                                         /*}}}*/
 180 // Stats - Dump some nice statistics                                    /*{{{*/
 181 // ---------------------------------------------------------------------
 182 /* */
 183 static bool Stats(CommandLine &CmdL)
 184 {
 185    if (CmdL.FileSize() > 1) {
 186       _error->Error(_("apt-cache stats does not take any arguments"));
 187       return false;
 188    }
 189
 190    pkgCacheFile CacheFile;
 191    pkgCache *Cache = CacheFile.GetPkgCache();
 192
 193    if (unlikely(Cache == NULL))
 194       return false;
 195
 196    cout << _("Total package names: ") << Cache->Head().GroupCount << " (" <<
 197       SizeToStr(Cache->Head().GroupCount*Cache->Head().GroupSz) << ')' << endl
 198         << _("Total package structures: ") << Cache->Head().PackageCount << " (" <<
 199       SizeToStr(Cache->Head().PackageCount*Cache->Head().PackageSz) << ')' << endl;
 200
 201    int Normal = 0;
 202    int Virtual = 0;
 203    int NVirt = 0;
 204    int DVirt = 0;
 205    int Missing = 0;
 206    pkgCache::PkgIterator I = Cache->PkgBegin();
 207    for (;I.end() != true; ++I)
 208    {
 209       if (I->VersionList != 0 && I->ProvidesList == 0)
 210       {
 211          Normal++;
 212          continue;
 213       }
 214
 215       if (I->VersionList != 0 && I->ProvidesList != 0)
 216       {
 217          NVirt++;
 218          continue;
 219       }
 220
 221       if (I->VersionList == 0 && I->ProvidesList != 0)
 222       {
 223          // Only 1 provides
 224          if (I.ProvidesList()->NextProvides == 0)
 225          {
 226             DVirt++;
 227          }
 228          else
 229             Virtual++;
 230          continue;
 231       }
 232       if (I->VersionList == 0 && I->ProvidesList == 0)
 233       {
 234          Missing++;
 235          continue;
 236       }
 237    }
 238    cout << _("  Normal packages: ") << Normal << endl;
 239    cout << _("  Pure virtual packages: ") << Virtual << endl;
 240    cout << _("  Single virtual packages: ") << DVirt << endl;
 241    cout << _("  Mixed virtual packages: ") << NVirt << endl;
 242    cout << _("  Missing: ") << Missing << endl;
 243
 244    cout << _("Total distinct versions: ") << Cache->Head().VersionCount << " (" <<
 245       SizeToStr(Cache->Head().VersionCount*Cache->Head().VersionSz) << ')' << endl;
 246    cout << _("Total distinct descriptions: ") << Cache->Head().DescriptionCount << " (" <<
 247       SizeToStr(Cache->Head().DescriptionCount*Cache->Head().DescriptionSz) << ')' << endl;
 248    cout << _("Total dependencies: ") << Cache->Head().DependsCount << "/" << Cache->Head().DependsDataCount << " (" <<
 249       SizeToStr((Cache->Head().DependsCount*Cache->Head().DependencySz) +
 250             (Cache->Head().DependsDataCount*Cache->Head().DependencyDataSz)) << ')' << endl;
 251    cout << _("Total ver/file relations: ") << Cache->Head().VerFileCount << " (" <<
 252       SizeToStr(Cache->Head().VerFileCount*Cache->Head().VerFileSz) << ')' << endl;
 253    cout << _("Total Desc/File relations: ") << Cache->Head().DescFileCount << " (" <<
 254       SizeToStr(Cache->Head().DescFileCount*Cache->Head().DescFileSz) << ')' << endl;
 255    cout << _("Total Provides mappings: ") << Cache->Head().ProvidesCount << " (" <<
 256       SizeToStr(Cache->Head().ProvidesCount*Cache->Head().ProvidesSz) << ')' << endl;
 257
 258    // String list stats
 259    std::set<map_stringitem_t> stritems;
 260    for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() == false; ++G)
 261       stritems.insert(G->Name);
 262    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
 263    {
 264       stritems.insert(P->Arch);
 265       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V)
 266       {
 267          if (V->VerStr != 0)
 268             stritems.insert(V->VerStr);
 269          if (V->Section != 0)
 270             stritems.insert(V->Section);
 271          stritems.insert(V->SourcePkgName);
 272          stritems.insert(V->SourceVerStr);
 273          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; ++D)
 274          {
 275             if (D->Version != 0)
 276                stritems.insert(D->Version);
 277          }
 278          for (pkgCache::DescIterator D = V.DescriptionList(); D.end() == false; ++D)
 279          {
 280             stritems.insert(D->md5sum);
 281             stritems.insert(D->language_code);
 282          }
 283       }
 284       for (pkgCache::PrvIterator Prv = P.ProvidesList(); Prv.end() == false; ++Prv)
 285       {
 286          if (Prv->ProvideVersion != 0)
 287             stritems.insert(Prv->ProvideVersion);
 288       }
 289    }
 290    for (pkgCache::RlsFileIterator F = Cache->RlsFileBegin(); F != Cache->RlsFileEnd(); ++F)
 291    {
 292       stritems.insert(F->FileName);
 293       stritems.insert(F->Archive);
 294       stritems.insert(F->Codename);
 295       stritems.insert(F->Version);
 296       stritems.insert(F->Origin);
 297       stritems.insert(F->Label);
 298       stritems.insert(F->Site);
 299    }
 300    for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F)
 301    {
 302       stritems.insert(F->FileName);
 303       stritems.insert(F->Architecture);
 304       stritems.insert(F->Component);
 305       stritems.insert(F->IndexType);
 306    }
 307
 308    unsigned long Size = 0;
 309    for (std::set<map_stringitem_t>::const_iterator i = stritems.begin(); i != stritems.end(); ++i)
 310       Size += strlen(Cache->StrP + *i) + 1;
 311    cout << _("Total globbed strings: ") << stritems.size() << " (" << SizeToStr(Size) << ')' << endl;
 312    stritems.clear();
 313
 314    unsigned long Slack = 0;
 315    for (int I = 0; I != 7; I++)
 316       Slack += Cache->Head().Pools[I].ItemSize*Cache->Head().Pools[I].Count;
 317    cout << _("Total slack space: ") << SizeToStr(Slack) << endl;
 318
 319    unsigned long Total = 0;
 320 #define APT_CACHESIZE(X,Y) (Cache->Head().X * Cache->Head().Y)
 321    Total = Slack + Size +
 322       APT_CACHESIZE(GroupCount, GroupSz) +
 323       APT_CACHESIZE(PackageCount, PackageSz) +
 324       APT_CACHESIZE(VersionCount, VersionSz) +
 325       APT_CACHESIZE(DescriptionCount, DescriptionSz) +
 326       APT_CACHESIZE(DependsCount, DependencySz) +
 327       APT_CACHESIZE(DependsDataCount, DependencyDataSz) +
 328       APT_CACHESIZE(ReleaseFileCount, ReleaseFileSz) +
 329       APT_CACHESIZE(PackageFileCount, PackageFileSz) +
 330       APT_CACHESIZE(VerFileCount, VerFileSz) +
 331       APT_CACHESIZE(DescFileCount, DescFileSz) +
 332       APT_CACHESIZE(ProvidesCount, ProvidesSz) +
 333       (2 * Cache->Head().GetHashTableSize() * sizeof(map_id_t));
 334    cout << _("Total space accounted for: ") << SizeToStr(Total) << endl;
 335 #undef APT_CACHESIZE
 336
 337    // hashtable stats
 338    ShowHashTableStats<pkgCache::Package>("PkgHashTable", Cache->PkgP, Cache->Head().PkgHashTableP(), Cache->Head().GetHashTableSize(), PackageNext);
 339    ShowHashTableStats<pkgCache::Group>("GrpHashTable", Cache->GrpP, Cache->Head().GrpHashTableP(), Cache->Head().GetHashTableSize(), GroupNext);
 340
 341    return true;
 342 }
 343                                                                         /*}}}*/
 344 // Dump - show everything                                               /*{{{*/
 345 // ---------------------------------------------------------------------
 346 /* This is worthless except fer debugging things */
 347 static bool Dump(CommandLine &)
 348 {
 349    pkgCacheFile CacheFile;
 350    pkgCache *Cache = CacheFile.GetPkgCache();
 351    if (unlikely(Cache == NULL))
 352       return false;
 353
 354    std::cout << "Using Versioning System: " << Cache->VS->Label << std::endl;
 355
 356    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
 357    {
 358       std::cout << "Package: " << P.FullName(true) << std::endl;
 359       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V)
 360       {
 361          std::cout << " Version: " << V.VerStr() << std::endl;
 362          std::cout << "     File: " << V.FileList().File().FileName() << std::endl;
 363          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; ++D)
 364             std::cout << "  Depends: " << D.TargetPkg().FullName(true) << ' ' <<
 365                              DeNull(D.TargetVer()) << std::endl;
 366          for (pkgCache::DescIterator D = V.DescriptionList(); D.end() == false; ++D)
 367          {
 368             std::cout << " Description Language: " << D.LanguageCode() << std::endl
 369                  << "                 File: " << D.FileList().File().FileName() << std::endl
 370                  << "                  MD5: " << D.md5() << std::endl;
 371          }
 372       }
 373    }
 374
 375    for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F.end() == false; ++F)
 376    {
 377       std::cout << "File: " << F.FileName() << std::endl;
 378       std::cout << " Type: " << F.IndexType() << std::endl;
 379       std::cout << " Size: " << F->Size << std::endl;
 380       std::cout << " ID: " << F->ID << std::endl;
 381       std::cout << " Flags: " << F->Flags << std::endl;
 382       std::cout << " Time: " << TimeRFC1123(F->mtime) << std::endl;
 383       std::cout << " Archive: " << DeNull(F.Archive()) << std::endl;
 384       std::cout << " Component: " << DeNull(F.Component()) << std::endl;
 385       std::cout << " Version: " << DeNull(F.Version()) << std::endl;
 386       std::cout << " Origin: " << DeNull(F.Origin()) << std::endl;
 387       std::cout << " Site: " << DeNull(F.Site()) << std::endl;
 388       std::cout << " Label: " << DeNull(F.Label()) << std::endl;
 389       std::cout << " Architecture: " << DeNull(F.Architecture()) << std::endl;
 390    }
 391
 392    return true;
 393 }
 394                                                                         /*}}}*/
 395 // DumpAvail - Print out the available list                             /*{{{*/
 396 // ---------------------------------------------------------------------
 397 /* This is needed to make dpkg --merge happy.. I spent a bit of time to
 398    make this run really fast, perhaps I went a little overboard.. */
 399 static bool DumpAvail(CommandLine &)
 400 {
 401    pkgCacheFile CacheFile;
 402    pkgCache *Cache = CacheFile.GetPkgCache();
 403    if (unlikely(Cache == NULL || CacheFile.BuildPolicy() == false))
 404       return false;
 405
 406    unsigned long Count = Cache->HeaderP->PackageCount+1;
 407    pkgCache::VerFile **VFList = new pkgCache::VerFile *[Count];
 408    memset(VFList,0,sizeof(*VFList)*Count);
 409
 410    // Map versions that we want to write out onto the VerList array.
 411    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
 412    {
 413       if (P->VersionList == 0)
 414          continue;
 415
 416       /* Find the proper version to use. If the policy says there are no
 417          possible selections we return the installed version, if available..
 418          This prevents dselect from making it obsolete. */
 419       pkgCache::VerIterator V = CacheFile.GetPolicy()->GetCandidateVer(P);
 420       if (V.end() == true)
 421       {
 422          if (P->CurrentVer == 0)
 423             continue;
 424          V = P.CurrentVer();
 425       }
 426
 427       pkgCache::VerFileIterator VF = V.FileList();
 428       for (; VF.end() == false ; ++VF)
 429          if ((VF.File()->Flags & pkgCache::Flag::NotSource) == 0)
 430             break;
 431
 432       /* Okay, here we have a bit of a problem.. The policy has selected the
 433          currently installed package - however it only exists in the
 434          status file.. We need to write out something or dselect will mark
 435          the package as obsolete! Thus we emit the status file entry, but
 436          below we remove the status line to make it valid for the
 437          available file. However! We only do this if their do exist *any*
 438          non-source versions of the package - that way the dselect obsolete
 439          handling works OK. */
 440       if (VF.end() == true)
 441       {
 442          for (pkgCache::VerIterator Cur = P.VersionList(); Cur.end() != true; ++Cur)
 443          {
 444             for (VF = Cur.FileList(); VF.end() == false; ++VF)
 445             {
 446                if ((VF.File()->Flags & pkgCache::Flag::NotSource) == 0)
 447                {
 448                   VF = V.FileList();
 449                   break;
 450                }
 451             }
 452
 453             if (VF.end() == false)
 454                break;
 455          }
 456       }
 457
 458       VFList[P->ID] = VF;
 459    }
 460
 461    LocalitySort(VFList,Count,sizeof(*VFList));
 462
 463    std::vector<pkgTagSection::Tag> RW;
 464    RW.push_back(pkgTagSection::Tag::Remove("Status"));
 465    RW.push_back(pkgTagSection::Tag::Remove("Config-Version"));
 466    FileFd stdoutfd;
 467    stdoutfd.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, false);
 468
 469    // Iterate over all the package files and write them out.
 470    char *Buffer = new char[Cache->HeaderP->MaxVerFileSize+10];
 471    for (pkgCache::VerFile **J = VFList; *J != 0;)
 472    {
 473       pkgCache::PkgFileIterator File(*Cache,(*J)->File + Cache->PkgFileP);
 474       if (File.IsOk() == false)
 475       {
 476          _error->Error(_("Package file %s is out of sync."),File.FileName());
 477          break;
 478       }
 479
 480       FileFd PkgF(File.FileName(),FileFd::ReadOnly, FileFd::Extension);
 481       if (_error->PendingError() == true)
 482          break;
 483
 484       /* Write all of the records from this package file, since we
 485          already did locality sorting we can now just seek through the
 486          file in read order. We apply 1 more optimization here, since often
 487          there will be < 1 byte gaps between records (for the \n) we read that
 488          into the next buffer and offset a bit.. */
 489       unsigned long Pos = 0;
 490       for (; *J != 0; J++)
 491       {
 492          if ((*J)->File + Cache->PkgFileP != File)
 493             break;
 494
 495          const pkgCache::VerFile &VF = **J;
 496
 497          // Read the record and then write it out again.
 498          unsigned long Jitter = VF.Offset - Pos;
 499          if (Jitter > 8)
 500          {
 501             if (PkgF.Seek(VF.Offset) == false)
 502                break;
 503             Jitter = 0;
 504          }
 505
 506          if (PkgF.Read(Buffer,VF.Size + Jitter) == false)
 507             break;
 508          Buffer[VF.Size + Jitter] = '\n';
 509
 510          // See above..
 511          if ((File->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource)
 512          {
 513             pkgTagSection Tags;
 514             if (Tags.Scan(Buffer+Jitter,VF.Size+1) == false ||
 515                 Tags.Write(stdoutfd, NULL, RW) == false ||
 516                 stdoutfd.Write("\n", 1) == false)
 517             {
 518                _error->Error("Internal Error, Unable to parse a package record");
 519                break;
 520             }
 521          }
 522          else
 523          {
 524             if (stdoutfd.Write(Buffer + Jitter, VF.Size + 1) == false)
 525                break;
 526          }
 527
 528          Pos = VF.Offset + VF.Size;
 529       }
 530
 531       if (_error->PendingError() == true)
 532          break;
 533    }
 534
 535    delete [] Buffer;
 536    delete [] VFList;
 537    return !_error->PendingError();
 538 }
 539                                                                         /*}}}*/
 540 // xvcg - Generate a graph for xvcg                                     /*{{{*/
 541 // ---------------------------------------------------------------------
 542 // Code contributed from Junichi Uekawa <dancer@debian.org> on 20 June 2002.
 543
 544 static bool XVcg(CommandLine &CmdL)
 545 {
 546    pkgCacheFile CacheFile;
 547    pkgCache *Cache = CacheFile.GetPkgCache();
 548    if (unlikely(Cache == NULL))
 549       return false;
 550
 551    bool GivenOnly = _config->FindB("APT::Cache::GivenOnly",false);
 552
 553    /* Normal packages are boxes
 554       Pure Provides are triangles
 555       Mixed are diamonds
 556       rhomb are missing packages*/
 557    const char *Shapes[] = {"ellipse","triangle","box","rhomb"};
 558
 559    /* Initialize the list of packages to show.
 560       1 = To Show
 561       2 = To Show no recurse
 562       3 = Emitted no recurse
 563       4 = Emitted
 564       0 = None */
 565    enum States {None=0, ToShow, ToShowNR, DoneNR, Done};
 566    enum TheFlags {ForceNR=(1<<0)};
 567    unsigned char *Show = new unsigned char[Cache->Head().PackageCount];
 568    unsigned char *Flags = new unsigned char[Cache->Head().PackageCount];
 569    unsigned char *ShapeMap = new unsigned char[Cache->Head().PackageCount];
 570
 571    // Show everything if no arguments given
 572    if (CmdL.FileList[1] == 0)
 573       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
 574          Show[I] = ToShow;
 575    else
 576       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
 577          Show[I] = None;
 578    memset(Flags,0,sizeof(*Flags)*Cache->Head().PackageCount);
 579
 580    // Map the shapes
 581    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 582    {
 583       if (Pkg->VersionList == 0)
 584       {
 585          // Missing
 586          if (Pkg->ProvidesList == 0)
 587             ShapeMap[Pkg->ID] = 0;
 588          else
 589             ShapeMap[Pkg->ID] = 1;
 590       }
 591       else
 592       {
 593          // Normal
 594          if (Pkg->ProvidesList == 0)
 595             ShapeMap[Pkg->ID] = 2;
 596          else
 597             ShapeMap[Pkg->ID] = 3;
 598       }
 599    }
 600
 601    // Load the list of packages from the command line into the show list
 602    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
 603    std::list<APT::CacheSetHelper::PkgModifier> mods;
 604    mods.push_back(APT::CacheSetHelper::PkgModifier(0, ",", APT::PackageSet::Modifier::POSTFIX));
 605    mods.push_back(APT::CacheSetHelper::PkgModifier(1, "^", APT::PackageSet::Modifier::POSTFIX));
 606    std::map<unsigned short, APT::PackageSet> pkgsets =
 607                 APT::PackageSet::GroupedFromCommandLine(CacheFile, CmdL.FileList + 1, mods, 0, helper);
 608
 609    for (APT::PackageSet::const_iterator Pkg = pkgsets[0].begin();
 610         Pkg != pkgsets[0].end(); ++Pkg)
 611       Show[Pkg->ID] = ToShow;
 612    for (APT::PackageSet::const_iterator Pkg = pkgsets[1].begin();
 613         Pkg != pkgsets[1].end(); ++Pkg)
 614    {
 615       Show[Pkg->ID] = ToShow;
 616       Flags[Pkg->ID] |= ForceNR;
 617    }
 618
 619    // Little header
 620    cout << "graph: { title: \"packages\"" << endl <<
 621      "xmax: 700 ymax: 700 x: 30 y: 30" << endl <<
 622      "layout_downfactor: 8" << endl;
 623
 624    bool Act = true;
 625    while (Act == true)
 626    {
 627       Act = false;
 628       for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 629       {
 630          // See we need to show this package
 631          if (Show[Pkg->ID] == None || Show[Pkg->ID] >= DoneNR)
 632             continue;
 633
 634          //printf ("node: { title: \"%s\" label: \"%s\" }\n", Pkg.Name(), Pkg.Name());
 635
 636          // Colour as done
 637          if (Show[Pkg->ID] == ToShowNR || (Flags[Pkg->ID] & ForceNR) == ForceNR)
 638          {
 639             // Pure Provides and missing packages have no deps!
 640             if (ShapeMap[Pkg->ID] == 0 || ShapeMap[Pkg->ID] == 1)
 641                Show[Pkg->ID] = Done;
 642             else
 643                Show[Pkg->ID] = DoneNR;
 644          }
 645          else
 646             Show[Pkg->ID] = Done;
 647          Act = true;
 648
 649          // No deps to map out
 650          if (Pkg->VersionList == 0 || Show[Pkg->ID] == DoneNR)
 651             continue;
 652
 653          pkgCache::VerIterator Ver = Pkg.VersionList();
 654          for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; ++D)
 655          {
 656             // See if anything can meet this dep
 657             // Walk along the actual package providing versions
 658             bool Hit = false;
 659             pkgCache::PkgIterator DPkg = D.TargetPkg();
 660             for (pkgCache::VerIterator I = DPkg.VersionList();
 661                       I.end() == false && Hit == false; ++I)
 662             {
 663                if (Cache->VS->CheckDep(I.VerStr(),D->CompareOp,D.TargetVer()) == true)
 664                   Hit = true;
 665             }
 666
 667             // Follow all provides
 668             for (pkgCache::PrvIterator I = DPkg.ProvidesList();
 669                       I.end() == false && Hit == false; ++I)
 670             {
 671                if (Cache->VS->CheckDep(I.ProvideVersion(),D->CompareOp,D.TargetVer()) == false)
 672                   Hit = true;
 673             }
 674
 675
 676             // Only graph critical deps
 677             if (D.IsCritical() == true)
 678             {
 679                printf ("edge: { sourcename: \"%s\" targetname: \"%s\" class: 2 ",Pkg.FullName(true).c_str(), D.TargetPkg().FullName(true).c_str() );
 680
 681                // Colour the node for recursion
 682                if (Show[D.TargetPkg()->ID] <= DoneNR)
 683                {
 684                   /* If a conflicts does not meet anything in the database
 685                      then show the relation but do not recurse */
 686                   if (Hit == false && D.IsNegative() == true)
 687                   {
 688                      if (Show[D.TargetPkg()->ID] == None &&
 689                          Show[D.TargetPkg()->ID] != ToShow)
 690                         Show[D.TargetPkg()->ID] = ToShowNR;
 691                   }
 692                   else
 693                   {
 694                      if (GivenOnly == true && Show[D.TargetPkg()->ID] != ToShow)
 695                         Show[D.TargetPkg()->ID] = ToShowNR;
 696                      else
 697                         Show[D.TargetPkg()->ID] = ToShow;
 698                   }
 699                }
 700
 701                // Edge colour
 702                switch(D->Type)
 703                {
 704                   case pkgCache::Dep::Conflicts:
 705                     printf("label: \"conflicts\" color: lightgreen }\n");
 706                     break;
 707                   case pkgCache::Dep::DpkgBreaks:
 708                     printf("label: \"breaks\" color: lightgreen }\n");
 709                     break;
 710                   case pkgCache::Dep::Obsoletes:
 711                     printf("label: \"obsoletes\" color: lightgreen }\n");
 712                     break;
 713
 714                   case pkgCache::Dep::PreDepends:
 715                     printf("label: \"predepends\" color: blue }\n");
 716                     break;
 717
 718                   default:
 719                     printf("}\n");
 720                   break;
 721                }
 722             }
 723          }
 724       }
 725    }
 726
 727    /* Draw the box colours after the fact since we can not tell what colour
 728       they should be until everything is finished drawing */
 729    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 730    {
 731       if (Show[Pkg->ID] < DoneNR)
 732          continue;
 733
 734       if (Show[Pkg->ID] == DoneNR)
 735          printf("node: { title: \"%s\" label: \"%s\" color: orange shape: %s }\n", Pkg.FullName(true).c_str(), Pkg.FullName(true).c_str(),
 736                 Shapes[ShapeMap[Pkg->ID]]);
 737       else
 738         printf("node: { title: \"%s\" label: \"%s\" shape: %s }\n", Pkg.FullName(true).c_str(), Pkg.FullName(true).c_str(),
 739                 Shapes[ShapeMap[Pkg->ID]]);
 740
 741    }
 742
 743    delete[] Show;
 744    delete[] Flags;
 745    delete[] ShapeMap;
 746
 747    printf("}\n");
 748    return true;
 749 }
 750                                                                         /*}}}*/
 751 // Dotty - Generate a graph for Dotty                                   /*{{{*/
 752 // ---------------------------------------------------------------------
 753 /* Dotty is the graphvis program for generating graphs. It is a fairly
 754    simple queuing algorithm that just writes dependencies and nodes.
 755    http://www.research.att.com/sw/tools/graphviz/ */
 756 static bool Dotty(CommandLine &CmdL)
 757 {
 758    pkgCacheFile CacheFile;
 759    pkgCache *Cache = CacheFile.GetPkgCache();
 760    if (unlikely(Cache == NULL))
 761       return false;
 762
 763    bool GivenOnly = _config->FindB("APT::Cache::GivenOnly",false);
 764
 765    /* Normal packages are boxes
 766       Pure Provides are triangles
 767       Mixed are diamonds
 768       Hexagons are missing packages*/
 769    const char *Shapes[] = {"hexagon","triangle","box","diamond"};
 770
 771    /* Initialize the list of packages to show.
 772       1 = To Show
 773       2 = To Show no recurse
 774       3 = Emitted no recurse
 775       4 = Emitted
 776       0 = None */
 777    enum States {None=0, ToShow, ToShowNR, DoneNR, Done};
 778    enum TheFlags {ForceNR=(1<<0)};
 779    unsigned char *Show = new unsigned char[Cache->Head().PackageCount];
 780    unsigned char *Flags = new unsigned char[Cache->Head().PackageCount];
 781    unsigned char *ShapeMap = new unsigned char[Cache->Head().PackageCount];
 782
 783    // Show everything if no arguments given
 784    if (CmdL.FileList[1] == 0)
 785       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
 786          Show[I] = ToShow;
 787    else
 788       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
 789          Show[I] = None;
 790    memset(Flags,0,sizeof(*Flags)*Cache->Head().PackageCount);
 791
 792    // Map the shapes
 793    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 794    {
 795       if (Pkg->VersionList == 0)
 796       {
 797          // Missing
 798          if (Pkg->ProvidesList == 0)
 799             ShapeMap[Pkg->ID] = 0;
 800          else
 801             ShapeMap[Pkg->ID] = 1;
 802       }
 803       else
 804       {
 805          // Normal
 806          if (Pkg->ProvidesList == 0)
 807             ShapeMap[Pkg->ID] = 2;
 808          else
 809             ShapeMap[Pkg->ID] = 3;
 810       }
 811    }
 812
 813    // Load the list of packages from the command line into the show list
 814    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
 815    std::list<APT::CacheSetHelper::PkgModifier> mods;
 816    mods.push_back(APT::CacheSetHelper::PkgModifier(0, ",", APT::PackageSet::Modifier::POSTFIX));
 817    mods.push_back(APT::CacheSetHelper::PkgModifier(1, "^", APT::PackageSet::Modifier::POSTFIX));
 818    std::map<unsigned short, APT::PackageSet> pkgsets =
 819                 APT::PackageSet::GroupedFromCommandLine(CacheFile, CmdL.FileList + 1, mods, 0, helper);
 820
 821    for (APT::PackageSet::const_iterator Pkg = pkgsets[0].begin();
 822         Pkg != pkgsets[0].end(); ++Pkg)
 823       Show[Pkg->ID] = ToShow;
 824    for (APT::PackageSet::const_iterator Pkg = pkgsets[1].begin();
 825         Pkg != pkgsets[1].end(); ++Pkg)
 826    {
 827       Show[Pkg->ID] = ToShow;
 828       Flags[Pkg->ID] |= ForceNR;
 829    }
 830
 831    // Little header
 832    printf("digraph packages {\n");
 833    printf("concentrate=true;\n");
 834    printf("size=\"30,40\";\n");
 835
 836    bool Act = true;
 837    while (Act == true)
 838    {
 839       Act = false;
 840       for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 841       {
 842          // See we need to show this package
 843          if (Show[Pkg->ID] == None || Show[Pkg->ID] >= DoneNR)
 844             continue;
 845
 846          // Colour as done
 847          if (Show[Pkg->ID] == ToShowNR || (Flags[Pkg->ID] & ForceNR) == ForceNR)
 848          {
 849             // Pure Provides and missing packages have no deps!
 850             if (ShapeMap[Pkg->ID] == 0 || ShapeMap[Pkg->ID] == 1)
 851                Show[Pkg->ID] = Done;
 852             else
 853                Show[Pkg->ID] = DoneNR;
 854          }
 855          else
 856             Show[Pkg->ID] = Done;
 857          Act = true;
 858
 859          // No deps to map out
 860          if (Pkg->VersionList == 0 || Show[Pkg->ID] == DoneNR)
 861             continue;
 862
 863          pkgCache::VerIterator Ver = Pkg.VersionList();
 864          for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; ++D)
 865          {
 866             // See if anything can meet this dep
 867             // Walk along the actual package providing versions
 868             bool Hit = false;
 869             pkgCache::PkgIterator DPkg = D.TargetPkg();
 870             for (pkgCache::VerIterator I = DPkg.VersionList();
 871                       I.end() == false && Hit == false; ++I)
 872             {
 873                if (Cache->VS->CheckDep(I.VerStr(),D->CompareOp,D.TargetVer()) == true)
 874                   Hit = true;
 875             }
 876
 877             // Follow all provides
 878             for (pkgCache::PrvIterator I = DPkg.ProvidesList();
 879                       I.end() == false && Hit == false; ++I)
 880             {
 881                if (Cache->VS->CheckDep(I.ProvideVersion(),D->CompareOp,D.TargetVer()) == false)
 882                   Hit = true;
 883             }
 884
 885             // Only graph critical deps
 886             if (D.IsCritical() == true)
 887             {
 888                printf("\"%s\" -> \"%s\"",Pkg.FullName(true).c_str(),D.TargetPkg().FullName(true).c_str());
 889
 890                // Colour the node for recursion
 891                if (Show[D.TargetPkg()->ID] <= DoneNR)
 892                {
 893                   /* If a conflicts does not meet anything in the database
 894                      then show the relation but do not recurse */
 895                   if (Hit == false && D.IsNegative() == true)
 896                   {
 897                      if (Show[D.TargetPkg()->ID] == None &&
 898                          Show[D.TargetPkg()->ID] != ToShow)
 899                         Show[D.TargetPkg()->ID] = ToShowNR;
 900                   }
 901                   else
 902                   {
 903                      if (GivenOnly == true && Show[D.TargetPkg()->ID] != ToShow)
 904                         Show[D.TargetPkg()->ID] = ToShowNR;
 905                      else
 906                         Show[D.TargetPkg()->ID] = ToShow;
 907                   }
 908                }
 909
 910                // Edge colour
 911                switch(D->Type)
 912                {
 913                   case pkgCache::Dep::Conflicts:
 914                   case pkgCache::Dep::Obsoletes:
 915                   case pkgCache::Dep::DpkgBreaks:
 916                   printf("[color=springgreen];\n");
 917                   break;
 918
 919                   case pkgCache::Dep::PreDepends:
 920                   printf("[color=blue];\n");
 921                   break;
 922
 923                   default:
 924                   printf(";\n");
 925                   break;
 926                }
 927             }
 928          }
 929       }
 930    }
 931
 932    /* Draw the box colours after the fact since we can not tell what colour
 933       they should be until everything is finished drawing */
 934    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 935    {
 936       if (Show[Pkg->ID] < DoneNR)
 937          continue;
 938
 939       // Orange box for early recursion stoppage
 940       if (Show[Pkg->ID] == DoneNR)
 941          printf("\"%s\" [color=orange,shape=%s];\n",Pkg.FullName(true).c_str(),
 942                 Shapes[ShapeMap[Pkg->ID]]);
 943       else
 944          printf("\"%s\" [shape=%s];\n",Pkg.FullName(true).c_str(),
 945                 Shapes[ShapeMap[Pkg->ID]]);
 946    }
 947
 948    printf("}\n");
 949    delete[] Show;
 950    delete[] Flags;
 951    delete[] ShapeMap;
 952    return true;
 953 }
 954                                                                         /*}}}*/
 955 /* ShowAuto - show automatically installed packages (sorted)            {{{*/
 956 static bool ShowAuto(CommandLine &)
 957 {
 958    pkgCacheFile CacheFile;
 959    pkgCache *Cache = CacheFile.GetPkgCache();
 960    pkgDepCache *DepCache = CacheFile.GetDepCache();
 961    if (unlikely(Cache == NULL || DepCache == NULL))
 962       return false;
 963
 964    std::vector<string> packages;
 965    packages.reserve(Cache->HeaderP->PackageCount / 3);
 966
 967    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
 968       if ((*DepCache)[P].Flags & pkgCache::Flag::Auto)
 969          packages.push_back(P.Name());
 970
 971     std::sort(packages.begin(), packages.end());
 972
 973     for (vector<string>::iterator I = packages.begin(); I != packages.end(); ++I)
 974             cout << *I << "\n";
 975
 976    _error->Notice(_("This command is deprecated. Please use 'apt-mark showauto' instead."));
 977    return true;
 978 }
 979                                                                         /*}}}*/
 980 // ShowPkgNames - Show package names                                    /*{{{*/
 981 // ---------------------------------------------------------------------
 982 /* This does a prefix match on the first argument */
 983 static bool ShowPkgNames(CommandLine &CmdL)
 984 {
 985    pkgCacheFile CacheFile;
 986    if (unlikely(CacheFile.BuildCaches(NULL, false) == false))
 987       return false;
 988    pkgCache::GrpIterator I = CacheFile.GetPkgCache()->GrpBegin();
 989    bool const All = _config->FindB("APT::Cache::AllNames","false");
 990
 991    if (CmdL.FileList[1] != 0)
 992    {
 993       for (;I.end() != true; ++I)
 994       {
 995          if (All == false && I->FirstPackage == 0)
 996             continue;
 997          if (I.FindPkg("any")->VersionList == 0)
 998             continue;
 999          if (strncmp(I.Name(),CmdL.FileList[1],strlen(CmdL.FileList[1])) == 0)
1000             cout << I.Name() << endl;
1001       }
1002
1003       return true;
1004    }
1005
1006    // Show all pkgs
1007    for (;I.end() != true; ++I)
1008    {
1009       if (All == false && I->FirstPackage == 0)
1010          continue;
1011       if (I.FindPkg("any")->VersionList == 0)
1012          continue;
1013       cout << I.Name() << endl;
1014    }
1015
1016    return true;
1017 }
1018                                                                         /*}}}*/
1019 // Madison - Look a bit like katie's madison                            /*{{{*/
1020 // ---------------------------------------------------------------------
1021 /* */
1022 static bool Madison(CommandLine &CmdL)
1023 {
1024    pkgCacheFile CacheFile;
1025    pkgSourceList *SrcList = CacheFile.GetSourceList();
1026
1027    if (SrcList == 0)
1028       return false;
1029
1030    // Create the src text record parsers and ignore errors about missing
1031    // deb-src lines that are generated from pkgSrcRecords::pkgSrcRecords
1032    pkgSrcRecords SrcRecs(*SrcList);
1033    if (_error->PendingError() == true)
1034       _error->Discard();
1035
1036    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
1037    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
1038    {
1039       _error->PushToStack();
1040       APT::PackageList pkgset = APT::PackageList::FromString(CacheFile, *I, helper);
1041       for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
1042       {
1043          for (pkgCache::VerIterator V = Pkg.VersionList(); V.end() == false; ++V)
1044          {
1045             for (pkgCache::VerFileIterator VF = V.FileList(); VF.end() == false; ++VF)
1046             {
1047 // This might be nice, but wouldn't uniquely identify the source -mdz
1048 //                if (VF.File().Archive() != 0)
1049 //                {
1050 //                   cout << setw(10) << Pkg.Name() << " | " << setw(10) << V.VerStr() << " | "
1051 //                        << VF.File().Archive() << endl;
1052 //                }
1053
1054                // Locate the associated index files so we can derive a description
1055                for (pkgSourceList::const_iterator S = SrcList->begin(); S != SrcList->end(); ++S)
1056                {
1057                     vector<pkgIndexFile *> *Indexes = (*S)->GetIndexFiles();
1058                     for (vector<pkgIndexFile *>::const_iterator IF = Indexes->begin();
1059                          IF != Indexes->end(); ++IF)
1060                     {
1061                          if ((*IF)->FindInCache(*(VF.File().Cache())) == VF.File())
1062                          {
1063                                    cout << setw(10) << Pkg.FullName(true) << " | " << setw(10) << V.VerStr() << " | "
1064                                         << (*IF)->Describe(true) << endl;
1065                          }
1066                     }
1067                }
1068             }
1069          }
1070       }
1071
1072       SrcRecs.Restart();
1073       pkgSrcRecords::Parser *SrcParser;
1074       bool foundSomething = false;
1075       while ((SrcParser = SrcRecs.Find(*I, false)) != 0)
1076       {
1077          foundSomething = true;
1078          // Maybe support Release info here too eventually
1079          cout << setw(10) << SrcParser->Package() << " | "
1080               << setw(10) << SrcParser->Version() << " | "
1081               << SrcParser->Index().Describe(true) << endl;
1082       }
1083       if (foundSomething == true)
1084          _error->RevertToStack();
1085       else
1086          _error->MergeWithStack();
1087    }
1088
1089    return true;
1090 }
1091                                                                         /*}}}*/
1092 // GenCaches - Call the main cache generator                            /*{{{*/
1093 // ---------------------------------------------------------------------
1094 /* */
1095 static bool GenCaches(CommandLine &)
1096 {
1097    OpTextProgress Progress(*_config);
1098
1099    pkgCacheFile CacheFile;
1100    return CacheFile.BuildCaches(&Progress, true);
1101 }
1102                                                                         /*}}}*/
1103 static bool ShowHelp(CommandLine &)                                     /*{{{*/
1104 {
1105    std::cout <<
1106     _("Usage: apt-cache [options] command\n"
1107       "       apt-cache [options] show pkg1 [pkg2 ...]\n"
1108       "\n"
1109       "apt-cache queries and displays available information about installed\n"
1110       "and installable packages. It works exclusively on the data acquired\n"
1111       "into the local cache via the 'update' command of e.g. apt-get. The\n"
1112       "displayed information may therefore be outdated if the last update was\n"
1113       "too long ago, but in exchange apt-cache works independently of the\n"
1114       "availability of the configured sources (e.g. offline).\n");
1115    return true;
1116 }
1117                                                                         /*}}}*/
1118 static std::vector<aptDispatchWithHelp> GetCommands()                   /*{{{*/
1119 {
1120    return {
1121       {"gencaches",&GenCaches, nullptr},
1122       {"showsrc",&ShowSrcPackage, _("Show source records")},
1123       {"showpkg",&DumpPackage, nullptr},
1124       {"stats",&Stats, nullptr},
1125       {"dump",&Dump, nullptr},
1126       {"dumpavail",&DumpAvail, nullptr},
1127       {"unmet",&UnMet, nullptr},
1128       {"search",&DoSearch, _("Search the package list for a regex pattern")},
1129       {"depends",&Depends, _("Show raw dependency information for a package")},
1130       {"rdepends",&RDepends, _("Show reverse dependency information for a package")},
1131       {"dotty",&Dotty, nullptr},
1132       {"xvcg",&XVcg, nullptr},
1133       {"show",&ShowPackage, _("Show a readable record for the package")},
1134       {"pkgnames",&ShowPkgNames, _("List the names of all packages in the system")},
1135       {"showauto",&ShowAuto, nullptr},
1136       {"policy",&Policy, _("Show policy settings")},
1137       {"madison",&Madison, nullptr},
1138       {nullptr, nullptr, nullptr}
1139    };
1140 }
1141                                                                         /*}}}*/
1142 int main(int argc,const char *argv[])                                   /*{{{*/
1143 {
1144    InitLocale();
1145
1146    // Parse the command line and initialize the package library
1147    CommandLine CmdL;
1148    auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_CACHE, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
1149
1150    InitOutput();
1151
1152    if (_config->Exists("APT::Cache::Generate") == true)
1153       _config->Set("pkgCacheFile::Generate", _config->FindB("APT::Cache::Generate", true));
1154
1155    return DispatchCommandLine(CmdL, Cmds);
1156 }
1157                                                                         /*}}}*/