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
  47 #include <regex.h>
  48 #include <stddef.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <unistd.h>
  52 #include <algorithm>
  53 #include <cstring>
  54 #include <iomanip>
  55 #include <iostream>
  56 #include <list>
  57 #include <map>
  58 #include <set>
  59 #include <string>
  60 #include <vector>
  61
  62 #include <apti18n.h>
  63                                                                         /*}}}*/
  64
  65 using namespace std;
  66
  67 // LocalitySort - Sort a version list by package file locality          /*{{{*/
  68 // ---------------------------------------------------------------------
  69 /* */
  70 static int LocalityCompare(const void *a, const void *b)
  71 {
  72    pkgCache::VerFile *A = *(pkgCache::VerFile **)a;
  73    pkgCache::VerFile *B = *(pkgCache::VerFile **)b;
  74
  75    if (A == 0 && B == 0)
  76       return 0;
  77    if (A == 0)
  78       return 1;
  79    if (B == 0)
  80       return -1;
  81
  82    if (A->File == B->File)
  83       return A->Offset - B->Offset;
  84    return A->File - B->File;
  85 }
  86
  87 static void LocalitySort(pkgCache::VerFile **begin,
  88                   unsigned long Count,size_t Size)
  89 {
  90    qsort(begin,Count,Size,LocalityCompare);
  91 }
  92
  93 static void LocalitySort(pkgCache::DescFile **begin,
  94                   unsigned long Count,size_t Size)
  95 {
  96    qsort(begin,Count,Size,LocalityCompare);
  97 }
  98                                                                         /*}}}*/
  99 // UnMet - Show unmet dependencies                                      /*{{{*/
 100 // ---------------------------------------------------------------------
 101 /* */
 102 static bool ShowUnMet(pkgCache::VerIterator const &V, bool const Important)
 103 {
 104          bool Header = false;
 105          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false;)
 106          {
 107             // Collect or groups
 108             pkgCache::DepIterator Start;
 109             pkgCache::DepIterator End;
 110             D.GlobOr(Start,End);
 111
 112             // Important deps only
 113             if (Important == true)
 114                if (End->Type != pkgCache::Dep::PreDepends &&
 115                    End->Type != pkgCache::Dep::Depends)
 116                   continue;
 117
 118             // Skip conflicts and replaces
 119             if (End.IsNegative() == true || End->Type == pkgCache::Dep::Replaces)
 120                continue;
 121
 122             // Verify the or group
 123             bool OK = false;
 124             pkgCache::DepIterator RealStart = Start;
 125             do
 126             {
 127                // See if this dep is Ok
 128                pkgCache::Version **VList = Start.AllTargets();
 129                if (*VList != 0)
 130                {
 131                   OK = true;
 132                   delete [] VList;
 133                   break;
 134                }
 135                delete [] VList;
 136
 137                if (Start == End)
 138                   break;
 139                ++Start;
 140             }
 141             while (1);
 142
 143             // The group is OK
 144             if (OK == true)
 145                continue;
 146
 147             // Oops, it failed..
 148             if (Header == false)
 149                ioprintf(cout,_("Package %s version %s has an unmet dep:\n"),
 150                         V.ParentPkg().FullName(true).c_str(),V.VerStr());
 151             Header = true;
 152
 153             // Print out the dep type
 154             cout << " " << End.DepType() << ": ";
 155
 156             // Show the group
 157             Start = RealStart;
 158             do
 159             {
 160                cout << Start.TargetPkg().FullName(true);
 161                if (Start.TargetVer() != 0)
 162                   cout << " (" << Start.CompType() << " " << Start.TargetVer() <<
 163                   ")";
 164                if (Start == End)
 165                   break;
 166                cout << " | ";
 167                ++Start;
 168             }
 169             while (1);
 170
 171             cout << endl;
 172          }
 173    return true;
 174 }
 175 static bool UnMet(CommandLine &CmdL)
 176 {
 177    bool const Important = _config->FindB("APT::Cache::Important",false);
 178
 179    pkgCacheFile CacheFile;
 180    if (unlikely(CacheFile.GetPkgCache() == NULL))
 181       return false;
 182
 183    if (CmdL.FileSize() <= 1)
 184    {
 185       for (pkgCache::PkgIterator P = CacheFile.GetPkgCache()->PkgBegin(); P.end() == false; ++P)
 186          for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V)
 187             if (ShowUnMet(V, Important) == false)
 188                return false;
 189    }
 190    else
 191    {
 192       CacheSetHelperVirtuals helper(true, GlobalError::NOTICE);
 193       APT::VersionList verset = APT::VersionList::FromCommandLine(CacheFile, CmdL.FileList + 1,
 194                                 APT::CacheSetHelper::CANDIDATE, helper);
 195       for (APT::VersionList::iterator V = verset.begin(); V != verset.end(); ++V)
 196          if (ShowUnMet(V, Important) == false)
 197             return false;
 198    }
 199    return true;
 200 }
 201                                                                         /*}}}*/
 202 // DumpPackage - Show a dump of a package record                        /*{{{*/
 203 // ---------------------------------------------------------------------
 204 /* */
 205 static bool DumpPackage(CommandLine &CmdL)
 206 {
 207    pkgCacheFile CacheFile;
 208    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
 209    APT::PackageList pkgset = APT::PackageList::FromCommandLine(CacheFile, CmdL.FileList + 1, helper);
 210
 211    for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
 212    {
 213       cout << "Package: " << Pkg.FullName(true) << endl;
 214       cout << "Versions: " << endl;
 215       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; ++Cur)
 216       {
 217          cout << Cur.VerStr();
 218          for (pkgCache::VerFileIterator Vf = Cur.FileList(); Vf.end() == false; ++Vf)
 219             cout << " (" << Vf.File().FileName() << ")";
 220          cout << endl;
 221          for (pkgCache::DescIterator D = Cur.DescriptionList(); D.end() == false; ++D)
 222          {
 223             cout << " Description Language: " << D.LanguageCode() << endl
 224                  << "                 File: " << D.FileList().File().FileName() << endl
 225                  << "                  MD5: " << D.md5() << endl;
 226          }
 227          cout << endl;
 228       }
 229
 230       cout << endl;
 231
 232       cout << "Reverse Depends: " << endl;
 233       for (pkgCache::DepIterator D = Pkg.RevDependsList(); D.end() != true; ++D)
 234       {
 235          cout << "  " << D.ParentPkg().FullName(true) << ',' << D.TargetPkg().FullName(true);
 236          if (D->Version != 0)
 237             cout << ' ' << DeNull(D.TargetVer()) << endl;
 238          else
 239             cout << endl;
 240       }
 241
 242       cout << "Dependencies: " << endl;
 243       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; ++Cur)
 244       {
 245          cout << Cur.VerStr() << " - ";
 246          for (pkgCache::DepIterator Dep = Cur.DependsList(); Dep.end() != true; ++Dep)
 247             cout << Dep.TargetPkg().FullName(true) << " (" << (int)Dep->CompareOp << " " << DeNull(Dep.TargetVer()) << ") ";
 248          cout << endl;
 249       }
 250
 251       cout << "Provides: " << endl;
 252       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; ++Cur)
 253       {
 254          cout << Cur.VerStr() << " - ";
 255          for (pkgCache::PrvIterator Prv = Cur.ProvidesList(); Prv.end() != true; ++Prv)
 256             cout << Prv.ParentPkg().FullName(true) << " ";
 257          cout << endl;
 258       }
 259       cout << "Reverse Provides: " << endl;
 260       for (pkgCache::PrvIterator Prv = Pkg.ProvidesList(); Prv.end() != true; ++Prv)
 261          cout << Prv.OwnerPkg().FullName(true) << " " << Prv.OwnerVer().VerStr() << endl;
 262    }
 263
 264    return true;
 265 }
 266                                                                         /*}}}*/
 267 // ShowHashTableStats - Show stats about a hashtable                    /*{{{*/
 268 // ---------------------------------------------------------------------
 269 /* */
 270 static map_pointer_t PackageNext(pkgCache::Package const * const P) { return P->NextPackage; }
 271 static map_pointer_t GroupNext(pkgCache::Group const * const G) { return G->Next; }
 272 template<class T>
 273 static void ShowHashTableStats(std::string Type,
 274                                T *StartP,
 275                                map_pointer_t *Hashtable,
 276                                unsigned long Size,
 277                                map_pointer_t(*Next)(T const * const))
 278 {
 279    // hashtable stats for the HashTable
 280    unsigned long NumBuckets = Size;
 281    unsigned long UsedBuckets = 0;
 282    unsigned long UnusedBuckets = 0;
 283    unsigned long LongestBucket = 0;
 284    unsigned long ShortestBucket = NumBuckets;
 285    unsigned long Entries = 0;
 286    for (unsigned int i=0; i < NumBuckets; ++i)
 287    {
 288       T *P = StartP + Hashtable[i];
 289       if(P == 0 || P == StartP)
 290       {
 291          ++UnusedBuckets;
 292          continue;
 293       }
 294       ++UsedBuckets;
 295       unsigned long ThisBucketSize = 0;
 296       for (; P != StartP; P = StartP + Next(P))
 297          ++ThisBucketSize;
 298       Entries += ThisBucketSize;
 299       LongestBucket = std::max(ThisBucketSize, LongestBucket);
 300       ShortestBucket = std::min(ThisBucketSize, ShortestBucket);
 301    }
 302    cout << "Total buckets in " << Type << ": " << NumBuckets << std::endl;
 303    cout << "  Unused: " << UnusedBuckets << std::endl;
 304    cout << "  Used: " << UsedBuckets  << std::endl;
 305    cout << "  Average entries: " << Entries/(double)NumBuckets << std::endl;
 306    cout << "  Longest: " << LongestBucket << std::endl;
 307    cout << "  Shortest: " << ShortestBucket << std::endl;
 308 }
 309                                                                         /*}}}*/
 310 // Stats - Dump some nice statistics                                    /*{{{*/
 311 // ---------------------------------------------------------------------
 312 /* */
 313 static bool Stats(CommandLine &)
 314 {
 315    pkgCacheFile CacheFile;
 316    pkgCache *Cache = CacheFile.GetPkgCache();
 317    if (unlikely(Cache == NULL))
 318       return false;
 319
 320    cout << _("Total package names: ") << Cache->Head().GroupCount << " (" <<
 321       SizeToStr(Cache->Head().GroupCount*Cache->Head().GroupSz) << ')' << endl
 322         << _("Total package structures: ") << Cache->Head().PackageCount << " (" <<
 323       SizeToStr(Cache->Head().PackageCount*Cache->Head().PackageSz) << ')' << endl;
 324
 325    int Normal = 0;
 326    int Virtual = 0;
 327    int NVirt = 0;
 328    int DVirt = 0;
 329    int Missing = 0;
 330    pkgCache::PkgIterator I = Cache->PkgBegin();
 331    for (;I.end() != true; ++I)
 332    {
 333       if (I->VersionList != 0 && I->ProvidesList == 0)
 334       {
 335          Normal++;
 336          continue;
 337       }
 338
 339       if (I->VersionList != 0 && I->ProvidesList != 0)
 340       {
 341          NVirt++;
 342          continue;
 343       }
 344
 345       if (I->VersionList == 0 && I->ProvidesList != 0)
 346       {
 347          // Only 1 provides
 348          if (I.ProvidesList()->NextProvides == 0)
 349          {
 350             DVirt++;
 351          }
 352          else
 353             Virtual++;
 354          continue;
 355       }
 356       if (I->VersionList == 0 && I->ProvidesList == 0)
 357       {
 358          Missing++;
 359          continue;
 360       }
 361    }
 362    cout << _("  Normal packages: ") << Normal << endl;
 363    cout << _("  Pure virtual packages: ") << Virtual << endl;
 364    cout << _("  Single virtual packages: ") << DVirt << endl;
 365    cout << _("  Mixed virtual packages: ") << NVirt << endl;
 366    cout << _("  Missing: ") << Missing << endl;
 367
 368    cout << _("Total distinct versions: ") << Cache->Head().VersionCount << " (" <<
 369       SizeToStr(Cache->Head().VersionCount*Cache->Head().VersionSz) << ')' << endl;
 370    cout << _("Total distinct descriptions: ") << Cache->Head().DescriptionCount << " (" <<
 371       SizeToStr(Cache->Head().DescriptionCount*Cache->Head().DescriptionSz) << ')' << endl;
 372    cout << _("Total dependencies: ") << Cache->Head().DependsCount << "/" << Cache->Head().DependsDataCount << " (" <<
 373       SizeToStr((Cache->Head().DependsCount*Cache->Head().DependencySz) +
 374             (Cache->Head().DependsDataCount*Cache->Head().DependencyDataSz)) << ')' << endl;
 375    cout << _("Total ver/file relations: ") << Cache->Head().VerFileCount << " (" <<
 376       SizeToStr(Cache->Head().VerFileCount*Cache->Head().VerFileSz) << ')' << endl;
 377    cout << _("Total Desc/File relations: ") << Cache->Head().DescFileCount << " (" <<
 378       SizeToStr(Cache->Head().DescFileCount*Cache->Head().DescFileSz) << ')' << endl;
 379    cout << _("Total Provides mappings: ") << Cache->Head().ProvidesCount << " (" <<
 380       SizeToStr(Cache->Head().ProvidesCount*Cache->Head().ProvidesSz) << ')' << endl;
 381
 382    // String list stats
 383    std::set<map_stringitem_t> stritems;
 384    for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() == false; ++G)
 385       stritems.insert(G->Name);
 386    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
 387    {
 388       stritems.insert(P->Arch);
 389       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V)
 390       {
 391          if (V->VerStr != 0)
 392             stritems.insert(V->VerStr);
 393          if (V->Section != 0)
 394             stritems.insert(V->Section);
 395          stritems.insert(V->SourcePkgName);
 396          stritems.insert(V->SourceVerStr);
 397          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; ++D)
 398          {
 399             if (D->Version != 0)
 400                stritems.insert(D->Version);
 401          }
 402          for (pkgCache::DescIterator D = V.DescriptionList(); D.end() == false; ++D)
 403          {
 404             stritems.insert(D->md5sum);
 405             stritems.insert(D->language_code);
 406          }
 407       }
 408       for (pkgCache::PrvIterator Prv = P.ProvidesList(); Prv.end() == false; ++Prv)
 409       {
 410          if (Prv->ProvideVersion != 0)
 411             stritems.insert(Prv->ProvideVersion);
 412       }
 413    }
 414    for (pkgCache::RlsFileIterator F = Cache->RlsFileBegin(); F != Cache->RlsFileEnd(); ++F)
 415    {
 416       stritems.insert(F->FileName);
 417       stritems.insert(F->Archive);
 418       stritems.insert(F->Codename);
 419       stritems.insert(F->Version);
 420       stritems.insert(F->Origin);
 421       stritems.insert(F->Label);
 422       stritems.insert(F->Site);
 423    }
 424    for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F)
 425    {
 426       stritems.insert(F->FileName);
 427       stritems.insert(F->Architecture);
 428       stritems.insert(F->Component);
 429       stritems.insert(F->IndexType);
 430    }
 431
 432    unsigned long Size = 0;
 433    for (std::set<map_stringitem_t>::const_iterator i = stritems.begin(); i != stritems.end(); ++i)
 434       Size += strlen(Cache->StrP + *i) + 1;
 435    cout << _("Total globbed strings: ") << stritems.size() << " (" << SizeToStr(Size) << ')' << endl;
 436    stritems.clear();
 437
 438    unsigned long Slack = 0;
 439    for (int I = 0; I != 7; I++)
 440       Slack += Cache->Head().Pools[I].ItemSize*Cache->Head().Pools[I].Count;
 441    cout << _("Total slack space: ") << SizeToStr(Slack) << endl;
 442
 443    unsigned long Total = 0;
 444 #define APT_CACHESIZE(X,Y) (Cache->Head().X * Cache->Head().Y)
 445    Total = Slack + Size +
 446       APT_CACHESIZE(GroupCount, GroupSz) +
 447       APT_CACHESIZE(PackageCount, PackageSz) +
 448       APT_CACHESIZE(VersionCount, VersionSz) +
 449       APT_CACHESIZE(DescriptionCount, DescriptionSz) +
 450       APT_CACHESIZE(DependsCount, DependencySz) +
 451       APT_CACHESIZE(DependsDataCount, DependencyDataSz) +
 452       APT_CACHESIZE(ReleaseFileCount, ReleaseFileSz) +
 453       APT_CACHESIZE(PackageFileCount, PackageFileSz) +
 454       APT_CACHESIZE(VerFileCount, VerFileSz) +
 455       APT_CACHESIZE(DescFileCount, DescFileSz) +
 456       APT_CACHESIZE(ProvidesCount, ProvidesSz) +
 457       (2 * Cache->Head().GetHashTableSize() * sizeof(map_id_t));
 458    cout << _("Total space accounted for: ") << SizeToStr(Total) << endl;
 459 #undef APT_CACHESIZE
 460
 461    // hashtable stats
 462    ShowHashTableStats<pkgCache::Package>("PkgHashTable", Cache->PkgP, Cache->Head().PkgHashTableP(), Cache->Head().GetHashTableSize(), PackageNext);
 463    ShowHashTableStats<pkgCache::Group>("GrpHashTable", Cache->GrpP, Cache->Head().GrpHashTableP(), Cache->Head().GetHashTableSize(), GroupNext);
 464
 465    return true;
 466 }
 467                                                                         /*}}}*/
 468 // Dump - show everything                                               /*{{{*/
 469 // ---------------------------------------------------------------------
 470 /* This is worthless except fer debugging things */
 471 static bool Dump(CommandLine &)
 472 {
 473    pkgCacheFile CacheFile;
 474    pkgCache *Cache = CacheFile.GetPkgCache();
 475    if (unlikely(Cache == NULL))
 476       return false;
 477
 478    std::cout << "Using Versioning System: " << Cache->VS->Label << std::endl;
 479
 480    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
 481    {
 482       std::cout << "Package: " << P.FullName(true) << std::endl;
 483       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V)
 484       {
 485          std::cout << " Version: " << V.VerStr() << std::endl;
 486          std::cout << "     File: " << V.FileList().File().FileName() << std::endl;
 487          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; ++D)
 488             std::cout << "  Depends: " << D.TargetPkg().FullName(true) << ' ' <<
 489                              DeNull(D.TargetVer()) << std::endl;
 490          for (pkgCache::DescIterator D = V.DescriptionList(); D.end() == false; ++D)
 491          {
 492             std::cout << " Description Language: " << D.LanguageCode() << std::endl
 493                  << "                 File: " << D.FileList().File().FileName() << std::endl
 494                  << "                  MD5: " << D.md5() << std::endl;
 495          }
 496       }
 497    }
 498
 499    for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F.end() == false; ++F)
 500    {
 501       std::cout << "File: " << F.FileName() << std::endl;
 502       std::cout << " Type: " << F.IndexType() << std::endl;
 503       std::cout << " Size: " << F->Size << std::endl;
 504       std::cout << " ID: " << F->ID << std::endl;
 505       std::cout << " Flags: " << F->Flags << std::endl;
 506       std::cout << " Time: " << TimeRFC1123(F->mtime) << std::endl;
 507       std::cout << " Archive: " << DeNull(F.Archive()) << std::endl;
 508       std::cout << " Component: " << DeNull(F.Component()) << std::endl;
 509       std::cout << " Version: " << DeNull(F.Version()) << std::endl;
 510       std::cout << " Origin: " << DeNull(F.Origin()) << std::endl;
 511       std::cout << " Site: " << DeNull(F.Site()) << std::endl;
 512       std::cout << " Label: " << DeNull(F.Label()) << std::endl;
 513       std::cout << " Architecture: " << DeNull(F.Architecture()) << std::endl;
 514    }
 515
 516    return true;
 517 }
 518                                                                         /*}}}*/
 519 // DumpAvail - Print out the available list                             /*{{{*/
 520 // ---------------------------------------------------------------------
 521 /* This is needed to make dpkg --merge happy.. I spent a bit of time to
 522    make this run really fast, perhaps I went a little overboard.. */
 523 static bool DumpAvail(CommandLine &)
 524 {
 525    pkgCacheFile CacheFile;
 526    pkgCache *Cache = CacheFile.GetPkgCache();
 527    if (unlikely(Cache == NULL || CacheFile.BuildPolicy() == false))
 528       return false;
 529
 530    unsigned long Count = Cache->HeaderP->PackageCount+1;
 531    pkgCache::VerFile **VFList = new pkgCache::VerFile *[Count];
 532    memset(VFList,0,sizeof(*VFList)*Count);
 533
 534    // Map versions that we want to write out onto the VerList array.
 535    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
 536    {
 537       if (P->VersionList == 0)
 538          continue;
 539
 540       /* Find the proper version to use. If the policy says there are no
 541          possible selections we return the installed version, if available..
 542          This prevents dselect from making it obsolete. */
 543       pkgCache::VerIterator V = CacheFile.GetPolicy()->GetCandidateVer(P);
 544       if (V.end() == true)
 545       {
 546          if (P->CurrentVer == 0)
 547             continue;
 548          V = P.CurrentVer();
 549       }
 550
 551       pkgCache::VerFileIterator VF = V.FileList();
 552       for (; VF.end() == false ; ++VF)
 553          if ((VF.File()->Flags & pkgCache::Flag::NotSource) == 0)
 554             break;
 555
 556       /* Okay, here we have a bit of a problem.. The policy has selected the
 557          currently installed package - however it only exists in the
 558          status file.. We need to write out something or dselect will mark
 559          the package as obsolete! Thus we emit the status file entry, but
 560          below we remove the status line to make it valid for the
 561          available file. However! We only do this if their do exist *any*
 562          non-source versions of the package - that way the dselect obsolete
 563          handling works OK. */
 564       if (VF.end() == true)
 565       {
 566          for (pkgCache::VerIterator Cur = P.VersionList(); Cur.end() != true; ++Cur)
 567          {
 568             for (VF = Cur.FileList(); VF.end() == false; ++VF)
 569             {
 570                if ((VF.File()->Flags & pkgCache::Flag::NotSource) == 0)
 571                {
 572                   VF = V.FileList();
 573                   break;
 574                }
 575             }
 576
 577             if (VF.end() == false)
 578                break;
 579          }
 580       }
 581
 582       VFList[P->ID] = VF;
 583    }
 584
 585    LocalitySort(VFList,Count,sizeof(*VFList));
 586
 587    std::vector<pkgTagSection::Tag> RW;
 588    RW.push_back(pkgTagSection::Tag::Remove("Status"));
 589    RW.push_back(pkgTagSection::Tag::Remove("Config-Version"));
 590    FileFd stdoutfd;
 591    stdoutfd.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, false);
 592
 593    // Iterate over all the package files and write them out.
 594    char *Buffer = new char[Cache->HeaderP->MaxVerFileSize+10];
 595    for (pkgCache::VerFile **J = VFList; *J != 0;)
 596    {
 597       pkgCache::PkgFileIterator File(*Cache,(*J)->File + Cache->PkgFileP);
 598       if (File.IsOk() == false)
 599       {
 600          _error->Error(_("Package file %s is out of sync."),File.FileName());
 601          break;
 602       }
 603
 604       FileFd PkgF(File.FileName(),FileFd::ReadOnly, FileFd::Extension);
 605       if (_error->PendingError() == true)
 606          break;
 607
 608       /* Write all of the records from this package file, since we
 609          already did locality sorting we can now just seek through the
 610          file in read order. We apply 1 more optimization here, since often
 611          there will be < 1 byte gaps between records (for the \n) we read that
 612          into the next buffer and offset a bit.. */
 613       unsigned long Pos = 0;
 614       for (; *J != 0; J++)
 615       {
 616          if ((*J)->File + Cache->PkgFileP != File)
 617             break;
 618
 619          const pkgCache::VerFile &VF = **J;
 620
 621          // Read the record and then write it out again.
 622          unsigned long Jitter = VF.Offset - Pos;
 623          if (Jitter > 8)
 624          {
 625             if (PkgF.Seek(VF.Offset) == false)
 626                break;
 627             Jitter = 0;
 628          }
 629
 630          if (PkgF.Read(Buffer,VF.Size + Jitter) == false)
 631             break;
 632          Buffer[VF.Size + Jitter] = '\n';
 633
 634          // See above..
 635          if ((File->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource)
 636          {
 637             pkgTagSection Tags;
 638             if (Tags.Scan(Buffer+Jitter,VF.Size+1) == false ||
 639                 Tags.Write(stdoutfd, NULL, RW) == false ||
 640                 stdoutfd.Write("\n", 1) == false)
 641             {
 642                _error->Error("Internal Error, Unable to parse a package record");
 643                break;
 644             }
 645          }
 646          else
 647          {
 648             if (stdoutfd.Write(Buffer + Jitter, VF.Size + 1) == false)
 649                break;
 650          }
 651
 652          Pos = VF.Offset + VF.Size;
 653       }
 654
 655       if (_error->PendingError() == true)
 656          break;
 657    }
 658
 659    delete [] Buffer;
 660    delete [] VFList;
 661    return !_error->PendingError();
 662 }
 663                                                                         /*}}}*/
 664 // ShowDepends - Helper for printing out a dependency tree              /*{{{*/
 665 static bool ShowDepends(CommandLine &CmdL, bool const RevDepends)
 666 {
 667    pkgCacheFile CacheFile;
 668    pkgCache *Cache = CacheFile.GetPkgCache();
 669    if (unlikely(Cache == NULL))
 670       return false;
 671
 672    CacheSetHelperVirtuals helper(false);
 673    APT::VersionList verset = APT::VersionList::FromCommandLine(CacheFile, CmdL.FileList + 1, APT::CacheSetHelper::CANDIDATE, helper);
 674    if (verset.empty() == true && helper.virtualPkgs.empty() == true)
 675       return _error->Error(_("No packages found"));
 676    std::vector<bool> Shown(Cache->Head().PackageCount);
 677
 678    bool const Recurse = _config->FindB("APT::Cache::RecurseDepends", false);
 679    bool const Installed = _config->FindB("APT::Cache::Installed", false);
 680    bool const Important = _config->FindB("APT::Cache::Important", false);
 681    bool const ShowDepType = _config->FindB("APT::Cache::ShowDependencyType", RevDepends == false);
 682    bool const ShowVersion = _config->FindB("APT::Cache::ShowVersion", false);
 683    bool const ShowPreDepends = _config->FindB("APT::Cache::ShowPre-Depends", true);
 684    bool const ShowDepends = _config->FindB("APT::Cache::ShowDepends", true);
 685    bool const ShowRecommends = _config->FindB("APT::Cache::ShowRecommends", Important == false);
 686    bool const ShowSuggests = _config->FindB("APT::Cache::ShowSuggests", Important == false);
 687    bool const ShowReplaces = _config->FindB("APT::Cache::ShowReplaces", Important == false);
 688    bool const ShowConflicts = _config->FindB("APT::Cache::ShowConflicts", Important == false);
 689    bool const ShowBreaks = _config->FindB("APT::Cache::ShowBreaks", Important == false);
 690    bool const ShowEnhances = _config->FindB("APT::Cache::ShowEnhances", Important == false);
 691    bool const ShowOnlyFirstOr = _config->FindB("APT::Cache::ShowOnlyFirstOr", false);
 692    bool const ShowImplicit = _config->FindB("APT::Cache::ShowImplicit", false);
 693
 694    while (verset.empty() != true)
 695    {
 696       pkgCache::VerIterator Ver = *verset.begin();
 697       verset.erase(verset.begin());
 698       pkgCache::PkgIterator Pkg = Ver.ParentPkg();
 699       Shown[Pkg->ID] = true;
 700
 701          cout << Pkg.FullName(true) << endl;
 702
 703          if (RevDepends == true)
 704             cout << "Reverse Depends:" << endl;
 705          for (pkgCache::DepIterator D = RevDepends ? Pkg.RevDependsList() : Ver.DependsList();
 706               D.end() == false; ++D)
 707          {
 708             switch (D->Type) {
 709             case pkgCache::Dep::PreDepends: if (!ShowPreDepends) continue; break;
 710             case pkgCache::Dep::Depends: if (!ShowDepends) continue; break;
 711             case pkgCache::Dep::Recommends: if (!ShowRecommends) continue; break;
 712             case pkgCache::Dep::Suggests: if (!ShowSuggests) continue; break;
 713             case pkgCache::Dep::Replaces: if (!ShowReplaces) continue; break;
 714             case pkgCache::Dep::Conflicts: if (!ShowConflicts) continue; break;
 715             case pkgCache::Dep::DpkgBreaks: if (!ShowBreaks) continue; break;
 716             case pkgCache::Dep::Enhances: if (!ShowEnhances) continue; break;
 717             }
 718             if (ShowImplicit == false && D.IsImplicit())
 719                continue;
 720
 721             pkgCache::PkgIterator Trg = RevDepends ? D.ParentPkg() : D.TargetPkg();
 722             bool const showNoArch = RevDepends || (D->CompareOp & pkgCache::Dep::ArchSpecific) != pkgCache::Dep::ArchSpecific;
 723
 724             if((Installed && Trg->CurrentVer != 0) || !Installed)
 725               {
 726
 727                 if ((D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or && ShowOnlyFirstOr == false)
 728                   cout << " |";
 729                 else
 730                   cout << "  ";
 731
 732                 // Show the package
 733                 if (ShowDepType == true)
 734                   cout << D.DepType() << ": ";
 735                 if (Trg->VersionList == 0)
 736                   cout << "<" << Trg.FullName(showNoArch) << ">";
 737                 else
 738                   cout << Trg.FullName(showNoArch);
 739                 if (ShowVersion == true && D->Version != 0)
 740                    cout << " (" << pkgCache::CompTypeDeb(D->CompareOp) << ' ' << D.TargetVer() << ')';
 741                 cout << std::endl;
 742
 743                 if (Recurse == true && Shown[Trg->ID] == false)
 744                 {
 745                   Shown[Trg->ID] = true;
 746                   verset.insert(APT::VersionSet::FromPackage(CacheFile, Trg, APT::CacheSetHelper::CANDIDATE, helper));
 747                 }
 748
 749               }
 750
 751             // Display all solutions
 752             SPtrArray<pkgCache::Version *> List = D.AllTargets();
 753             pkgPrioSortList(*Cache,List);
 754             for (pkgCache::Version **I = List; *I != 0; I++)
 755             {
 756                pkgCache::VerIterator V(*Cache,*I);
 757                if (V != Cache->VerP + V.ParentPkg()->VersionList ||
 758                    V->ParentPkg == D->Package)
 759                   continue;
 760                cout << "    " << V.ParentPkg().FullName(true) << endl;
 761
 762                 if (Recurse == true && Shown[V.ParentPkg()->ID] == false)
 763                 {
 764                   Shown[V.ParentPkg()->ID] = true;
 765                   verset.insert(APT::VersionSet::FromPackage(CacheFile, V.ParentPkg(), APT::CacheSetHelper::CANDIDATE, helper));
 766                 }
 767             }
 768
 769             if (ShowOnlyFirstOr == true)
 770                while ((D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or) ++D;
 771          }
 772    }
 773
 774    for (APT::PackageSet::const_iterator Pkg = helper.virtualPkgs.begin();
 775         Pkg != helper.virtualPkgs.end(); ++Pkg)
 776       cout << '<' << Pkg.FullName(true) << '>' << endl;
 777
 778    return true;
 779 }
 780                                                                         /*}}}*/
 781 // Depends - Print out a dependency tree                                /*{{{*/
 782 // ---------------------------------------------------------------------
 783 /* */
 784 static bool Depends(CommandLine &CmdL)
 785 {
 786    return ShowDepends(CmdL, false);
 787 }
 788                                                                         /*}}}*/
 789 // RDepends - Print out a reverse dependency tree                       /*{{{*/
 790 // ---------------------------------------------------------------------
 791 /* */
 792 static bool RDepends(CommandLine &CmdL)
 793 {
 794    return ShowDepends(CmdL, true);
 795 }
 796                                                                         /*}}}*/
 797 // xvcg - Generate a graph for xvcg                                     /*{{{*/
 798 // ---------------------------------------------------------------------
 799 // Code contributed from Junichi Uekawa <dancer@debian.org> on 20 June 2002.
 800
 801 static bool XVcg(CommandLine &CmdL)
 802 {
 803    pkgCacheFile CacheFile;
 804    pkgCache *Cache = CacheFile.GetPkgCache();
 805    if (unlikely(Cache == NULL))
 806       return false;
 807
 808    bool GivenOnly = _config->FindB("APT::Cache::GivenOnly",false);
 809
 810    /* Normal packages are boxes
 811       Pure Provides are triangles
 812       Mixed are diamonds
 813       rhomb are missing packages*/
 814    const char *Shapes[] = {"ellipse","triangle","box","rhomb"};
 815
 816    /* Initialize the list of packages to show.
 817       1 = To Show
 818       2 = To Show no recurse
 819       3 = Emitted no recurse
 820       4 = Emitted
 821       0 = None */
 822    enum States {None=0, ToShow, ToShowNR, DoneNR, Done};
 823    enum TheFlags {ForceNR=(1<<0)};
 824    unsigned char *Show = new unsigned char[Cache->Head().PackageCount];
 825    unsigned char *Flags = new unsigned char[Cache->Head().PackageCount];
 826    unsigned char *ShapeMap = new unsigned char[Cache->Head().PackageCount];
 827
 828    // Show everything if no arguments given
 829    if (CmdL.FileList[1] == 0)
 830       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
 831          Show[I] = ToShow;
 832    else
 833       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
 834          Show[I] = None;
 835    memset(Flags,0,sizeof(*Flags)*Cache->Head().PackageCount);
 836
 837    // Map the shapes
 838    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 839    {
 840       if (Pkg->VersionList == 0)
 841       {
 842          // Missing
 843          if (Pkg->ProvidesList == 0)
 844             ShapeMap[Pkg->ID] = 0;
 845          else
 846             ShapeMap[Pkg->ID] = 1;
 847       }
 848       else
 849       {
 850          // Normal
 851          if (Pkg->ProvidesList == 0)
 852             ShapeMap[Pkg->ID] = 2;
 853          else
 854             ShapeMap[Pkg->ID] = 3;
 855       }
 856    }
 857
 858    // Load the list of packages from the command line into the show list
 859    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
 860    std::list<APT::CacheSetHelper::PkgModifier> mods;
 861    mods.push_back(APT::CacheSetHelper::PkgModifier(0, ",", APT::PackageSet::Modifier::POSTFIX));
 862    mods.push_back(APT::CacheSetHelper::PkgModifier(1, "^", APT::PackageSet::Modifier::POSTFIX));
 863    std::map<unsigned short, APT::PackageSet> pkgsets =
 864                 APT::PackageSet::GroupedFromCommandLine(CacheFile, CmdL.FileList + 1, mods, 0, helper);
 865
 866    for (APT::PackageSet::const_iterator Pkg = pkgsets[0].begin();
 867         Pkg != pkgsets[0].end(); ++Pkg)
 868       Show[Pkg->ID] = ToShow;
 869    for (APT::PackageSet::const_iterator Pkg = pkgsets[1].begin();
 870         Pkg != pkgsets[1].end(); ++Pkg)
 871    {
 872       Show[Pkg->ID] = ToShow;
 873       Flags[Pkg->ID] |= ForceNR;
 874    }
 875
 876    // Little header
 877    cout << "graph: { title: \"packages\"" << endl <<
 878      "xmax: 700 ymax: 700 x: 30 y: 30" << endl <<
 879      "layout_downfactor: 8" << endl;
 880
 881    bool Act = true;
 882    while (Act == true)
 883    {
 884       Act = false;
 885       for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 886       {
 887          // See we need to show this package
 888          if (Show[Pkg->ID] == None || Show[Pkg->ID] >= DoneNR)
 889             continue;
 890
 891          //printf ("node: { title: \"%s\" label: \"%s\" }\n", Pkg.Name(), Pkg.Name());
 892
 893          // Colour as done
 894          if (Show[Pkg->ID] == ToShowNR || (Flags[Pkg->ID] & ForceNR) == ForceNR)
 895          {
 896             // Pure Provides and missing packages have no deps!
 897             if (ShapeMap[Pkg->ID] == 0 || ShapeMap[Pkg->ID] == 1)
 898                Show[Pkg->ID] = Done;
 899             else
 900                Show[Pkg->ID] = DoneNR;
 901          }
 902          else
 903             Show[Pkg->ID] = Done;
 904          Act = true;
 905
 906          // No deps to map out
 907          if (Pkg->VersionList == 0 || Show[Pkg->ID] == DoneNR)
 908             continue;
 909
 910          pkgCache::VerIterator Ver = Pkg.VersionList();
 911          for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; ++D)
 912          {
 913             // See if anything can meet this dep
 914             // Walk along the actual package providing versions
 915             bool Hit = false;
 916             pkgCache::PkgIterator DPkg = D.TargetPkg();
 917             for (pkgCache::VerIterator I = DPkg.VersionList();
 918                       I.end() == false && Hit == false; ++I)
 919             {
 920                if (Cache->VS->CheckDep(I.VerStr(),D->CompareOp,D.TargetVer()) == true)
 921                   Hit = true;
 922             }
 923
 924             // Follow all provides
 925             for (pkgCache::PrvIterator I = DPkg.ProvidesList();
 926                       I.end() == false && Hit == false; ++I)
 927             {
 928                if (Cache->VS->CheckDep(I.ProvideVersion(),D->CompareOp,D.TargetVer()) == false)
 929                   Hit = true;
 930             }
 931
 932
 933             // Only graph critical deps
 934             if (D.IsCritical() == true)
 935             {
 936                printf ("edge: { sourcename: \"%s\" targetname: \"%s\" class: 2 ",Pkg.FullName(true).c_str(), D.TargetPkg().FullName(true).c_str() );
 937
 938                // Colour the node for recursion
 939                if (Show[D.TargetPkg()->ID] <= DoneNR)
 940                {
 941                   /* If a conflicts does not meet anything in the database
 942                      then show the relation but do not recurse */
 943                   if (Hit == false && D.IsNegative() == true)
 944                   {
 945                      if (Show[D.TargetPkg()->ID] == None &&
 946                          Show[D.TargetPkg()->ID] != ToShow)
 947                         Show[D.TargetPkg()->ID] = ToShowNR;
 948                   }
 949                   else
 950                   {
 951                      if (GivenOnly == true && Show[D.TargetPkg()->ID] != ToShow)
 952                         Show[D.TargetPkg()->ID] = ToShowNR;
 953                      else
 954                         Show[D.TargetPkg()->ID] = ToShow;
 955                   }
 956                }
 957
 958                // Edge colour
 959                switch(D->Type)
 960                {
 961                   case pkgCache::Dep::Conflicts:
 962                     printf("label: \"conflicts\" color: lightgreen }\n");
 963                     break;
 964                   case pkgCache::Dep::DpkgBreaks:
 965                     printf("label: \"breaks\" color: lightgreen }\n");
 966                     break;
 967                   case pkgCache::Dep::Obsoletes:
 968                     printf("label: \"obsoletes\" color: lightgreen }\n");
 969                     break;
 970
 971                   case pkgCache::Dep::PreDepends:
 972                     printf("label: \"predepends\" color: blue }\n");
 973                     break;
 974
 975                   default:
 976                     printf("}\n");
 977                   break;
 978                }
 979             }
 980          }
 981       }
 982    }
 983
 984    /* Draw the box colours after the fact since we can not tell what colour
 985       they should be until everything is finished drawing */
 986    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
 987    {
 988       if (Show[Pkg->ID] < DoneNR)
 989          continue;
 990
 991       if (Show[Pkg->ID] == DoneNR)
 992          printf("node: { title: \"%s\" label: \"%s\" color: orange shape: %s }\n", Pkg.FullName(true).c_str(), Pkg.FullName(true).c_str(),
 993                 Shapes[ShapeMap[Pkg->ID]]);
 994       else
 995         printf("node: { title: \"%s\" label: \"%s\" shape: %s }\n", Pkg.FullName(true).c_str(), Pkg.FullName(true).c_str(),
 996                 Shapes[ShapeMap[Pkg->ID]]);
 997
 998    }
 999
1000    delete[] Show;
1001    delete[] Flags;
1002    delete[] ShapeMap;
1003
1004    printf("}\n");
1005    return true;
1006 }
1007                                                                         /*}}}*/
1008 // Dotty - Generate a graph for Dotty                                   /*{{{*/
1009 // ---------------------------------------------------------------------
1010 /* Dotty is the graphvis program for generating graphs. It is a fairly
1011    simple queuing algorithm that just writes dependencies and nodes.
1012    http://www.research.att.com/sw/tools/graphviz/ */
1013 static bool Dotty(CommandLine &CmdL)
1014 {
1015    pkgCacheFile CacheFile;
1016    pkgCache *Cache = CacheFile.GetPkgCache();
1017    if (unlikely(Cache == NULL))
1018       return false;
1019
1020    bool GivenOnly = _config->FindB("APT::Cache::GivenOnly",false);
1021
1022    /* Normal packages are boxes
1023       Pure Provides are triangles
1024       Mixed are diamonds
1025       Hexagons are missing packages*/
1026    const char *Shapes[] = {"hexagon","triangle","box","diamond"};
1027
1028    /* Initialize the list of packages to show.
1029       1 = To Show
1030       2 = To Show no recurse
1031       3 = Emitted no recurse
1032       4 = Emitted
1033       0 = None */
1034    enum States {None=0, ToShow, ToShowNR, DoneNR, Done};
1035    enum TheFlags {ForceNR=(1<<0)};
1036    unsigned char *Show = new unsigned char[Cache->Head().PackageCount];
1037    unsigned char *Flags = new unsigned char[Cache->Head().PackageCount];
1038    unsigned char *ShapeMap = new unsigned char[Cache->Head().PackageCount];
1039
1040    // Show everything if no arguments given
1041    if (CmdL.FileList[1] == 0)
1042       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
1043          Show[I] = ToShow;
1044    else
1045       for (unsigned long I = 0; I != Cache->Head().PackageCount; I++)
1046          Show[I] = None;
1047    memset(Flags,0,sizeof(*Flags)*Cache->Head().PackageCount);
1048
1049    // Map the shapes
1050    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
1051    {
1052       if (Pkg->VersionList == 0)
1053       {
1054          // Missing
1055          if (Pkg->ProvidesList == 0)
1056             ShapeMap[Pkg->ID] = 0;
1057          else
1058             ShapeMap[Pkg->ID] = 1;
1059       }
1060       else
1061       {
1062          // Normal
1063          if (Pkg->ProvidesList == 0)
1064             ShapeMap[Pkg->ID] = 2;
1065          else
1066             ShapeMap[Pkg->ID] = 3;
1067       }
1068    }
1069
1070    // Load the list of packages from the command line into the show list
1071    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
1072    std::list<APT::CacheSetHelper::PkgModifier> mods;
1073    mods.push_back(APT::CacheSetHelper::PkgModifier(0, ",", APT::PackageSet::Modifier::POSTFIX));
1074    mods.push_back(APT::CacheSetHelper::PkgModifier(1, "^", APT::PackageSet::Modifier::POSTFIX));
1075    std::map<unsigned short, APT::PackageSet> pkgsets =
1076                 APT::PackageSet::GroupedFromCommandLine(CacheFile, CmdL.FileList + 1, mods, 0, helper);
1077
1078    for (APT::PackageSet::const_iterator Pkg = pkgsets[0].begin();
1079         Pkg != pkgsets[0].end(); ++Pkg)
1080       Show[Pkg->ID] = ToShow;
1081    for (APT::PackageSet::const_iterator Pkg = pkgsets[1].begin();
1082         Pkg != pkgsets[1].end(); ++Pkg)
1083    {
1084       Show[Pkg->ID] = ToShow;
1085       Flags[Pkg->ID] |= ForceNR;
1086    }
1087
1088    // Little header
1089    printf("digraph packages {\n");
1090    printf("concentrate=true;\n");
1091    printf("size=\"30,40\";\n");
1092
1093    bool Act = true;
1094    while (Act == true)
1095    {
1096       Act = false;
1097       for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
1098       {
1099          // See we need to show this package
1100          if (Show[Pkg->ID] == None || Show[Pkg->ID] >= DoneNR)
1101             continue;
1102
1103          // Colour as done
1104          if (Show[Pkg->ID] == ToShowNR || (Flags[Pkg->ID] & ForceNR) == ForceNR)
1105          {
1106             // Pure Provides and missing packages have no deps!
1107             if (ShapeMap[Pkg->ID] == 0 || ShapeMap[Pkg->ID] == 1)
1108                Show[Pkg->ID] = Done;
1109             else
1110                Show[Pkg->ID] = DoneNR;
1111          }
1112          else
1113             Show[Pkg->ID] = Done;
1114          Act = true;
1115
1116          // No deps to map out
1117          if (Pkg->VersionList == 0 || Show[Pkg->ID] == DoneNR)
1118             continue;
1119
1120          pkgCache::VerIterator Ver = Pkg.VersionList();
1121          for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; ++D)
1122          {
1123             // See if anything can meet this dep
1124             // Walk along the actual package providing versions
1125             bool Hit = false;
1126             pkgCache::PkgIterator DPkg = D.TargetPkg();
1127             for (pkgCache::VerIterator I = DPkg.VersionList();
1128                       I.end() == false && Hit == false; ++I)
1129             {
1130                if (Cache->VS->CheckDep(I.VerStr(),D->CompareOp,D.TargetVer()) == true)
1131                   Hit = true;
1132             }
1133
1134             // Follow all provides
1135             for (pkgCache::PrvIterator I = DPkg.ProvidesList();
1136                       I.end() == false && Hit == false; ++I)
1137             {
1138                if (Cache->VS->CheckDep(I.ProvideVersion(),D->CompareOp,D.TargetVer()) == false)
1139                   Hit = true;
1140             }
1141
1142             // Only graph critical deps
1143             if (D.IsCritical() == true)
1144             {
1145                printf("\"%s\" -> \"%s\"",Pkg.FullName(true).c_str(),D.TargetPkg().FullName(true).c_str());
1146
1147                // Colour the node for recursion
1148                if (Show[D.TargetPkg()->ID] <= DoneNR)
1149                {
1150                   /* If a conflicts does not meet anything in the database
1151                      then show the relation but do not recurse */
1152                   if (Hit == false && D.IsNegative() == true)
1153                   {
1154                      if (Show[D.TargetPkg()->ID] == None &&
1155                          Show[D.TargetPkg()->ID] != ToShow)
1156                         Show[D.TargetPkg()->ID] = ToShowNR;
1157                   }
1158                   else
1159                   {
1160                      if (GivenOnly == true && Show[D.TargetPkg()->ID] != ToShow)
1161                         Show[D.TargetPkg()->ID] = ToShowNR;
1162                      else
1163                         Show[D.TargetPkg()->ID] = ToShow;
1164                   }
1165                }
1166
1167                // Edge colour
1168                switch(D->Type)
1169                {
1170                   case pkgCache::Dep::Conflicts:
1171                   case pkgCache::Dep::Obsoletes:
1172                   case pkgCache::Dep::DpkgBreaks:
1173                   printf("[color=springgreen];\n");
1174                   break;
1175
1176                   case pkgCache::Dep::PreDepends:
1177                   printf("[color=blue];\n");
1178                   break;
1179
1180                   default:
1181                   printf(";\n");
1182                   break;
1183                }
1184             }
1185          }
1186       }
1187    }
1188
1189    /* Draw the box colours after the fact since we can not tell what colour
1190       they should be until everything is finished drawing */
1191    for (pkgCache::PkgIterator Pkg = Cache->PkgBegin(); Pkg.end() == false; ++Pkg)
1192    {
1193       if (Show[Pkg->ID] < DoneNR)
1194          continue;
1195
1196       // Orange box for early recursion stoppage
1197       if (Show[Pkg->ID] == DoneNR)
1198          printf("\"%s\" [color=orange,shape=%s];\n",Pkg.FullName(true).c_str(),
1199                 Shapes[ShapeMap[Pkg->ID]]);
1200       else
1201          printf("\"%s\" [shape=%s];\n",Pkg.FullName(true).c_str(),
1202                 Shapes[ShapeMap[Pkg->ID]]);
1203    }
1204
1205    printf("}\n");
1206    delete[] Show;
1207    delete[] Flags;
1208    delete[] ShapeMap;
1209    return true;
1210 }
1211                                                                         /*}}}*/
1212 // DisplayRecord - Displays the complete record for the package         /*{{{*/
1213 // ---------------------------------------------------------------------
1214 /* This displays the package record from the proper package index file.
1215    It is not used by DumpAvail for performance reasons. */
1216
1217 static APT_PURE unsigned char const* skipDescriptionFields(unsigned char const * DescP)
1218 {
1219    char const * const TagName = "\nDescription";
1220    size_t const TagLen = strlen(TagName);
1221    while ((DescP = (unsigned char*)strchr((char*)DescP, '\n')) != NULL)
1222    {
1223       if (DescP[1] == ' ')
1224          DescP += 2;
1225       else if (strncmp((char*)DescP, TagName, TagLen) == 0)
1226          DescP += TagLen;
1227       else
1228          break;
1229    }
1230    if (DescP != NULL)
1231       ++DescP;
1232    return DescP;
1233 }
1234 static bool DisplayRecord(pkgCacheFile &CacheFile, pkgCache::VerIterator V)
1235 {
1236    pkgCache *Cache = CacheFile.GetPkgCache();
1237    if (unlikely(Cache == NULL))
1238       return false;
1239
1240    // Find an appropriate file
1241    pkgCache::VerFileIterator Vf = V.FileList();
1242    for (; Vf.end() == false; ++Vf)
1243       if ((Vf.File()->Flags & pkgCache::Flag::NotSource) == 0)
1244          break;
1245    if (Vf.end() == true)
1246       Vf = V.FileList();
1247
1248    // Check and load the package list file
1249    pkgCache::PkgFileIterator I = Vf.File();
1250    if (I.IsOk() == false)
1251       return _error->Error(_("Package file %s is out of sync."),I.FileName());
1252
1253    FileFd PkgF;
1254    if (PkgF.Open(I.FileName(), FileFd::ReadOnly, FileFd::Extension) == false)
1255       return false;
1256
1257    // Read the record (and ensure that it ends with a newline and NUL)
1258    unsigned char *Buffer = new unsigned char[Cache->HeaderP->MaxVerFileSize+2];
1259    Buffer[Vf->Size] = '\n';
1260    Buffer[Vf->Size+1] = '\0';
1261    if (PkgF.Seek(Vf->Offset) == false ||
1262        PkgF.Read(Buffer,Vf->Size) == false)
1263    {
1264       delete [] Buffer;
1265       return false;
1266    }
1267
1268    // Get a pointer to start of Description field
1269    const unsigned char *DescP = (unsigned char*)strstr((char*)Buffer, "\nDescription");
1270    if (DescP != NULL)
1271       ++DescP;
1272    else
1273       DescP = Buffer + Vf->Size;
1274
1275    // Write all but Description
1276    size_t const length = DescP - Buffer;
1277    if (length != 0 && FileFd::Write(STDOUT_FILENO, Buffer, length) == false)
1278    {
1279       delete [] Buffer;
1280       return false;
1281    }
1282
1283    // Show the right description
1284    pkgRecords Recs(*Cache);
1285    pkgCache::DescIterator Desc = V.TranslatedDescription();
1286    if (Desc.end() == false)
1287    {
1288       pkgRecords::Parser &P = Recs.Lookup(Desc.FileList());
1289       cout << "Description" << ( (strcmp(Desc.LanguageCode(),"") != 0) ? "-" : "" ) << Desc.LanguageCode() << ": " << P.LongDesc();
1290       cout << std::endl << "Description-md5: " << Desc.md5() << std::endl;
1291
1292       // Find the first field after the description (if there is any)
1293       DescP = skipDescriptionFields(DescP);
1294    }
1295    // else we have no translation, so we found a lonely Description-md5 -> don't skip it
1296
1297    // write the rest of the buffer, but skip mixed in Descriptions* fields
1298    while (DescP != NULL)
1299    {
1300       const unsigned char * const Start = DescP;
1301       const unsigned char *End = (unsigned char*)strstr((char*)DescP, "\nDescription");
1302       if (End == NULL)
1303       {
1304          End = &Buffer[Vf->Size];
1305          DescP = NULL;
1306       }
1307       else
1308       {
1309          ++End; // get the newline into the output
1310          DescP = skipDescriptionFields(End + strlen("Description"));
1311       }
1312       size_t const length = End - Start;
1313       if (length != 0 && FileFd::Write(STDOUT_FILENO, Start, length) == false)
1314       {
1315          delete [] Buffer;
1316          return false;
1317       }
1318    }
1319
1320    // write a final newline after the last field
1321    cout<<endl;
1322
1323    delete [] Buffer;
1324    return true;
1325 }
1326                                                                         /*}}}*/
1327 struct ExDescFile
1328 {
1329    pkgCache::DescFile *Df;
1330    map_id_t ID;
1331 };
1332
1333 // Search - Perform a search                                            /*{{{*/
1334 // ---------------------------------------------------------------------
1335 /* This searches the package names and package descriptions for a pattern */
1336 static bool Search(CommandLine &CmdL)
1337 {
1338    bool const ShowFull = _config->FindB("APT::Cache::ShowFull",false);
1339    bool const NamesOnly = _config->FindB("APT::Cache::NamesOnly",false);
1340    unsigned int const NumPatterns = CmdL.FileSize() -1;
1341
1342    pkgCacheFile CacheFile;
1343    pkgCache *Cache = CacheFile.GetPkgCache();
1344    pkgDepCache::Policy *Plcy = CacheFile.GetPolicy();
1345    if (unlikely(Cache == NULL || Plcy == NULL))
1346       return false;
1347
1348    // Make sure there is at least one argument
1349    if (NumPatterns < 1)
1350       return _error->Error(_("You must give at least one search pattern"));
1351
1352    // Compile the regex pattern
1353    regex_t *Patterns = new regex_t[NumPatterns];
1354    memset(Patterns,0,sizeof(*Patterns)*NumPatterns);
1355    for (unsigned I = 0; I != NumPatterns; I++)
1356    {
1357       if (regcomp(&Patterns[I],CmdL.FileList[I+1],REG_EXTENDED | REG_ICASE |
1358                   REG_NOSUB) != 0)
1359       {
1360          for (; I != 0; I--)
1361             regfree(&Patterns[I]);
1362          return _error->Error("Regex compilation error");
1363       }
1364    }
1365
1366    if (_error->PendingError() == true)
1367    {
1368       for (unsigned I = 0; I != NumPatterns; I++)
1369          regfree(&Patterns[I]);
1370       return false;
1371    }
1372
1373    size_t const descCount = Cache->HeaderP->GroupCount + 1;
1374    ExDescFile *DFList = new ExDescFile[descCount];
1375    memset(DFList,0,sizeof(*DFList) * descCount);
1376
1377    bool *PatternMatch = new bool[descCount * NumPatterns];
1378    memset(PatternMatch,false,sizeof(*PatternMatch) * descCount * NumPatterns);
1379
1380    // Map versions that we want to write out onto the VerList array.
1381    for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() == false; ++G)
1382    {
1383       size_t const PatternOffset = G->ID * NumPatterns;
1384       size_t unmatched = 0, matched = 0;
1385       for (unsigned I = 0; I < NumPatterns; ++I)
1386       {
1387          if (PatternMatch[PatternOffset + I] == true)
1388             ++matched;
1389          else if (regexec(&Patterns[I],G.Name(),0,0,0) == 0)
1390             PatternMatch[PatternOffset + I] = true;
1391          else
1392             ++unmatched;
1393       }
1394
1395       // already dealt with this package?
1396       if (matched == NumPatterns)
1397          continue;
1398
1399       // Doing names only, drop any that don't match..
1400       if (NamesOnly == true && unmatched == NumPatterns)
1401          continue;
1402
1403       // Find the proper version to use
1404       pkgCache::PkgIterator P = G.FindPreferredPkg();
1405       if (P.end() == true)
1406          continue;
1407       pkgCache::VerIterator V = Plcy->GetCandidateVer(P);
1408       if (V.end() == false)
1409       {
1410          pkgCache::DescIterator const D = V.TranslatedDescription();
1411          //FIXME: packages without a description can't be found
1412          if (D.end() == true)
1413             continue;
1414          DFList[G->ID].Df = D.FileList();
1415          DFList[G->ID].ID = G->ID;
1416       }
1417
1418       if (unmatched == NumPatterns)
1419          continue;
1420
1421       // Include all the packages that provide matching names too
1422       for (pkgCache::PrvIterator Prv = P.ProvidesList() ; Prv.end() == false; ++Prv)
1423       {
1424          pkgCache::VerIterator V = Plcy->GetCandidateVer(Prv.OwnerPkg());
1425          if (V.end() == true)
1426             continue;
1427
1428          unsigned long id = Prv.OwnerPkg().Group()->ID;
1429          pkgCache::DescIterator const D = V.TranslatedDescription();
1430          //FIXME: packages without a description can't be found
1431          if (D.end() == true)
1432             continue;
1433          DFList[id].Df = D.FileList();
1434          DFList[id].ID = id;
1435
1436          size_t const PrvPatternOffset = id * NumPatterns;
1437          for (unsigned I = 0; I < NumPatterns; ++I)
1438             PatternMatch[PrvPatternOffset + I] = PatternMatch[PatternOffset + I];
1439       }
1440    }
1441
1442    LocalitySort(&DFList->Df,Cache->HeaderP->GroupCount,sizeof(*DFList));
1443
1444    // Create the text record parser
1445    pkgRecords Recs(*Cache);
1446    // Iterate over all the version records and check them
1447    for (ExDescFile *J = DFList; J->Df != 0; ++J)
1448    {
1449       pkgRecords::Parser &P = Recs.Lookup(pkgCache::DescFileIterator(*Cache,J->Df));
1450       size_t const PatternOffset = J->ID * NumPatterns;
1451
1452       if (NamesOnly == false)
1453       {
1454          string const LongDesc = P.LongDesc();
1455          for (unsigned I = 0; I < NumPatterns; ++I)
1456          {
1457             if (PatternMatch[PatternOffset + I] == true)
1458                continue;
1459             else if (regexec(&Patterns[I],LongDesc.c_str(),0,0,0) == 0)
1460                PatternMatch[PatternOffset + I] = true;
1461          }
1462       }
1463
1464       bool matchedAll = true;
1465       for (unsigned I = 0; I < NumPatterns; ++I)
1466          if (PatternMatch[PatternOffset + I] == false)
1467          {
1468             matchedAll = false;
1469             break;
1470          }
1471
1472       if (matchedAll == true)
1473       {
1474          if (ShowFull == true)
1475          {
1476             const char *Start;
1477             const char *End;
1478             P.GetRec(Start,End);
1479             fwrite(Start,End-Start,1,stdout);
1480             putc('\n',stdout);
1481          }
1482          else
1483             printf("%s - %s\n",P.Name().c_str(),P.ShortDesc().c_str());
1484       }
1485    }
1486
1487    delete [] DFList;
1488    delete [] PatternMatch;
1489    for (unsigned I = 0; I != NumPatterns; I++)
1490       regfree(&Patterns[I]);
1491    delete [] Patterns;
1492    if (ferror(stdout))
1493        return _error->Error("Write to stdout failed");
1494    return true;
1495 }
1496                                                                         /*}}}*/
1497 /* ShowAuto - show automatically installed packages (sorted)            {{{*/
1498 static bool ShowAuto(CommandLine &)
1499 {
1500    pkgCacheFile CacheFile;
1501    pkgCache *Cache = CacheFile.GetPkgCache();
1502    pkgDepCache *DepCache = CacheFile.GetDepCache();
1503    if (unlikely(Cache == NULL || DepCache == NULL))
1504       return false;
1505
1506    std::vector<string> packages;
1507    packages.reserve(Cache->HeaderP->PackageCount / 3);
1508
1509    for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
1510       if ((*DepCache)[P].Flags & pkgCache::Flag::Auto)
1511          packages.push_back(P.Name());
1512
1513     std::sort(packages.begin(), packages.end());
1514
1515     for (vector<string>::iterator I = packages.begin(); I != packages.end(); ++I)
1516             cout << *I << "\n";
1517
1518    _error->Notice(_("This command is deprecated. Please use 'apt-mark showauto' instead."));
1519    return true;
1520 }
1521                                                                         /*}}}*/
1522 // ShowPackage - Dump the package record to the screen                  /*{{{*/
1523 // ---------------------------------------------------------------------
1524 /* */
1525 static bool ShowPackage(CommandLine &CmdL)
1526 {
1527    pkgCacheFile CacheFile;
1528    CacheSetHelperVirtuals helper(true, GlobalError::NOTICE);
1529    APT::CacheSetHelper::VerSelector const select = _config->FindB("APT::Cache::AllVersions", true) ?
1530                         APT::CacheSetHelper::ALL : APT::CacheSetHelper::CANDIDATE;
1531    APT::VersionList const verset = APT::VersionList::FromCommandLine(CacheFile, CmdL.FileList + 1, select, helper);
1532    for (APT::VersionList::const_iterator Ver = verset.begin(); Ver != verset.end(); ++Ver)
1533       if (DisplayRecord(CacheFile, Ver) == false)
1534          return false;
1535
1536    if (verset.empty() == true)
1537    {
1538       if (helper.virtualPkgs.empty() == true)
1539         return _error->Error(_("No packages found"));
1540       else
1541         _error->Notice(_("No packages found"));
1542    }
1543    return true;
1544 }
1545                                                                         /*}}}*/
1546 // ShowPkgNames - Show package names                                    /*{{{*/
1547 // ---------------------------------------------------------------------
1548 /* This does a prefix match on the first argument */
1549 static bool ShowPkgNames(CommandLine &CmdL)
1550 {
1551    pkgCacheFile CacheFile;
1552    if (unlikely(CacheFile.BuildCaches(NULL, false) == false))
1553       return false;
1554    pkgCache::GrpIterator I = CacheFile.GetPkgCache()->GrpBegin();
1555    bool const All = _config->FindB("APT::Cache::AllNames","false");
1556
1557    if (CmdL.FileList[1] != 0)
1558    {
1559       for (;I.end() != true; ++I)
1560       {
1561          if (All == false && I->FirstPackage == 0)
1562             continue;
1563          if (I.FindPkg("any")->VersionList == 0)
1564             continue;
1565          if (strncmp(I.Name(),CmdL.FileList[1],strlen(CmdL.FileList[1])) == 0)
1566             cout << I.Name() << endl;
1567       }
1568
1569       return true;
1570    }
1571
1572    // Show all pkgs
1573    for (;I.end() != true; ++I)
1574    {
1575       if (All == false && I->FirstPackage == 0)
1576          continue;
1577       if (I.FindPkg("any")->VersionList == 0)
1578          continue;
1579       cout << I.Name() << endl;
1580    }
1581
1582    return true;
1583 }
1584                                                                         /*}}}*/
1585 // ShowSrcPackage - Show source package records                         /*{{{*/
1586 // ---------------------------------------------------------------------
1587 /* */
1588 static bool ShowSrcPackage(CommandLine &CmdL)
1589 {
1590    pkgCacheFile CacheFile;
1591    pkgSourceList *List = CacheFile.GetSourceList();
1592    if (unlikely(List == NULL))
1593       return false;
1594
1595    // Create the text record parsers
1596    pkgSrcRecords SrcRecs(*List);
1597    if (_error->PendingError() == true)
1598       return false;
1599
1600    unsigned found = 0;
1601    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
1602    {
1603       SrcRecs.Restart();
1604
1605       pkgSrcRecords::Parser *Parse;
1606       unsigned found_this = 0;
1607       while ((Parse = SrcRecs.Find(*I,false)) != 0) {
1608         cout << Parse->AsStr() << endl;;
1609         found++;
1610         found_this++;
1611       }
1612       if (found_this == 0) {
1613         _error->Warning(_("Unable to locate package %s"),*I);
1614         continue;
1615       }
1616    }
1617    if (found == 0)
1618       _error->Notice(_("No packages found"));
1619    return true;
1620 }
1621                                                                         /*}}}*/
1622 // Policy - Show the results of the preferences file                    /*{{{*/
1623 // ---------------------------------------------------------------------
1624 /* */
1625 static bool Policy(CommandLine &CmdL)
1626 {
1627    pkgCacheFile CacheFile;
1628    pkgCache *Cache = CacheFile.GetPkgCache();
1629    pkgPolicy *Plcy = CacheFile.GetPolicy();
1630    pkgSourceList *SrcList = CacheFile.GetSourceList();
1631    if (unlikely(Cache == NULL || Plcy == NULL || SrcList == NULL))
1632       return false;
1633
1634    /* Should the MultiArchKiller be run to see which pseudo packages for an
1635       arch all package are currently installed? Activating it gives a speed
1636       penality for no real gain beside enhanced debugging, so in general no. */
1637    if (_config->FindB("APT::Cache::Policy::DepCache", false) == true)
1638       CacheFile.GetDepCache();
1639
1640    // Print out all of the package files
1641    if (CmdL.FileList[1] == 0)
1642    {
1643       cout << _("Package files:") << endl;
1644       for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F.end() == false; ++F)
1645       {
1646          if (F.Flagged(pkgCache::Flag::NoPackages))
1647             continue;
1648          // Locate the associated index files so we can derive a description
1649          pkgIndexFile *Indx;
1650          if (SrcList->FindIndex(F,Indx) == false &&
1651              _system->FindIndex(F,Indx) == false)
1652             return _error->Error(_("Cache is out of sync, can't x-ref a package file"));
1653
1654          printf("%4i %s\n",
1655                 Plcy->GetPriority(F),Indx->Describe(true).c_str());
1656
1657          // Print the reference information for the package
1658          string Str = F.RelStr();
1659          if (Str.empty() == false)
1660             printf("     release %s\n",F.RelStr().c_str());
1661          if (F.Site() != 0 && F.Site()[0] != 0)
1662             printf("     origin %s\n",F.Site());
1663       }
1664
1665       // Show any packages have explicit pins
1666       cout << _("Pinned packages:") << endl;
1667       pkgCache::PkgIterator I = Cache->PkgBegin();
1668       for (;I.end() != true; ++I)
1669       {
1670          if (Plcy->GetPriority(I) == 0)
1671             continue;
1672
1673          // Print the package name and the version we are forcing to
1674          cout << "     " << I.FullName(true) << " -> ";
1675
1676          pkgCache::VerIterator V = Plcy->GetMatch(I);
1677          if (V.end() == true)
1678             cout << _("(not found)") << endl;
1679          else
1680             cout << V.VerStr() << endl;
1681       }
1682
1683       return true;
1684    }
1685
1686    char const * const msgInstalled = _("  Installed: ");
1687    char const * const msgCandidate = _("  Candidate: ");
1688    short const InstalledLessCandidate =
1689                 mbstowcs(NULL, msgInstalled, 0) - mbstowcs(NULL, msgCandidate, 0);
1690    short const deepInstalled =
1691                 (InstalledLessCandidate < 0 ? (InstalledLessCandidate*-1) : 0) - 1;
1692    short const deepCandidate =
1693                 (InstalledLessCandidate > 0 ? (InstalledLessCandidate) : 0) - 1;
1694
1695    // Print out detailed information for each package
1696    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
1697    APT::PackageList pkgset = APT::PackageList::FromCommandLine(CacheFile, CmdL.FileList + 1, helper);
1698    for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
1699    {
1700       cout << Pkg.FullName(true) << ":" << endl;
1701
1702       // Installed version
1703       cout << msgInstalled << OutputInDepth(deepInstalled, " ");
1704       if (Pkg->CurrentVer == 0)
1705          cout << _("(none)") << endl;
1706       else
1707          cout << Pkg.CurrentVer().VerStr() << endl;
1708
1709       // Candidate Version
1710       cout << msgCandidate << OutputInDepth(deepCandidate, " ");
1711       pkgCache::VerIterator V = Plcy->GetCandidateVer(Pkg);
1712       if (V.end() == true)
1713          cout << _("(none)") << endl;
1714       else
1715          cout << V.VerStr() << endl;
1716
1717       // Pinned version
1718       if (Plcy->GetPriority(Pkg) != 0)
1719       {
1720          cout << _("  Package pin: ");
1721          V = Plcy->GetMatch(Pkg);
1722          if (V.end() == true)
1723             cout << _("(not found)") << endl;
1724          else
1725             cout << V.VerStr() << endl;
1726       }
1727
1728       // Show the priority tables
1729       cout << _("  Version table:") << endl;
1730       for (V = Pkg.VersionList(); V.end() == false; ++V)
1731       {
1732          if (Pkg.CurrentVer() == V)
1733             cout << " *** " << V.VerStr();
1734          else
1735             cout << "     " << V.VerStr();
1736          cout << " " << Plcy->GetPriority(V) << endl;
1737          for (pkgCache::VerFileIterator VF = V.FileList(); VF.end() == false; ++VF)
1738          {
1739             // Locate the associated index files so we can derive a description
1740             pkgIndexFile *Indx;
1741             if (SrcList->FindIndex(VF.File(),Indx) == false &&
1742                 _system->FindIndex(VF.File(),Indx) == false)
1743                return _error->Error(_("Cache is out of sync, can't x-ref a package file"));
1744             printf("       %4i %s\n",Plcy->GetPriority(VF.File()),
1745                    Indx->Describe(true).c_str());
1746          }
1747       }
1748    }
1749
1750    return true;
1751 }
1752                                                                         /*}}}*/
1753 // Madison - Look a bit like katie's madison                            /*{{{*/
1754 // ---------------------------------------------------------------------
1755 /* */
1756 static bool Madison(CommandLine &CmdL)
1757 {
1758    pkgCacheFile CacheFile;
1759    pkgSourceList *SrcList = CacheFile.GetSourceList();
1760
1761    if (SrcList == 0)
1762       return false;
1763
1764    // Create the src text record parsers and ignore errors about missing
1765    // deb-src lines that are generated from pkgSrcRecords::pkgSrcRecords
1766    pkgSrcRecords SrcRecs(*SrcList);
1767    if (_error->PendingError() == true)
1768       _error->Discard();
1769
1770    APT::CacheSetHelper helper(true, GlobalError::NOTICE);
1771    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
1772    {
1773       _error->PushToStack();
1774       APT::PackageList pkgset = APT::PackageList::FromString(CacheFile, *I, helper);
1775       for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
1776       {
1777          for (pkgCache::VerIterator V = Pkg.VersionList(); V.end() == false; ++V)
1778          {
1779             for (pkgCache::VerFileIterator VF = V.FileList(); VF.end() == false; ++VF)
1780             {
1781 // This might be nice, but wouldn't uniquely identify the source -mdz
1782 //                if (VF.File().Archive() != 0)
1783 //                {
1784 //                   cout << setw(10) << Pkg.Name() << " | " << setw(10) << V.VerStr() << " | "
1785 //                        << VF.File().Archive() << endl;
1786 //                }
1787
1788                // Locate the associated index files so we can derive a description
1789                for (pkgSourceList::const_iterator S = SrcList->begin(); S != SrcList->end(); ++S)
1790                {
1791                     vector<pkgIndexFile *> *Indexes = (*S)->GetIndexFiles();
1792                     for (vector<pkgIndexFile *>::const_iterator IF = Indexes->begin();
1793                          IF != Indexes->end(); ++IF)
1794                     {
1795                          if ((*IF)->FindInCache(*(VF.File().Cache())) == VF.File())
1796                          {
1797                                    cout << setw(10) << Pkg.FullName(true) << " | " << setw(10) << V.VerStr() << " | "
1798                                         << (*IF)->Describe(true) << endl;
1799                          }
1800                     }
1801                }
1802             }
1803          }
1804       }
1805
1806       SrcRecs.Restart();
1807       pkgSrcRecords::Parser *SrcParser;
1808       bool foundSomething = false;
1809       while ((SrcParser = SrcRecs.Find(*I, false)) != 0)
1810       {
1811          foundSomething = true;
1812          // Maybe support Release info here too eventually
1813          cout << setw(10) << SrcParser->Package() << " | "
1814               << setw(10) << SrcParser->Version() << " | "
1815               << SrcParser->Index().Describe(true) << endl;
1816       }
1817       if (foundSomething == true)
1818          _error->RevertToStack();
1819       else
1820          _error->MergeWithStack();
1821    }
1822
1823    return true;
1824 }
1825                                                                         /*}}}*/
1826 // GenCaches - Call the main cache generator                            /*{{{*/
1827 // ---------------------------------------------------------------------
1828 /* */
1829 static bool GenCaches(CommandLine &)
1830 {
1831    OpTextProgress Progress(*_config);
1832
1833    pkgCacheFile CacheFile;
1834    return CacheFile.BuildCaches(&Progress, true);
1835 }
1836                                                                         /*}}}*/
1837 // ShowHelp - Show a help screen                                        /*{{{*/
1838 // ---------------------------------------------------------------------
1839 /* */
1840 static bool ShowHelp(CommandLine &)
1841 {
1842    ioprintf(cout, "%s %s (%s)\n", PACKAGE, PACKAGE_VERSION, COMMON_ARCH);
1843
1844    if (_config->FindB("version") == true)
1845      return true;
1846
1847    cout <<
1848     _("Usage: apt-cache [options] command\n"
1849       "       apt-cache [options] showpkg pkg1 [pkg2 ...]\n"
1850       "       apt-cache [options] showsrc pkg1 [pkg2 ...]\n"
1851       "\n"
1852       "apt-cache is a low-level tool used to query information\n"
1853       "from APT's binary cache files\n"
1854       "\n"
1855       "Commands:\n"
1856       "   gencaches - Build both the package and source cache\n"
1857       "   showpkg - Show some general information for a single package\n"
1858       "   showsrc - Show source records\n"
1859       "   stats - Show some basic statistics\n"
1860       "   dump - Show the entire file in a terse form\n"
1861       "   dumpavail - Print an available file to stdout\n"
1862       "   unmet - Show unmet dependencies\n"
1863       "   search - Search the package list for a regex pattern\n"
1864       "   show - Show a readable record for the package\n"
1865       "   depends - Show raw dependency information for a package\n"
1866       "   rdepends - Show reverse dependency information for a package\n"
1867       "   pkgnames - List the names of all packages in the system\n"
1868       "   dotty - Generate package graphs for GraphViz\n"
1869       "   xvcg - Generate package graphs for xvcg\n"
1870       "   policy - Show policy settings\n"
1871       "\n"
1872       "Options:\n"
1873       "  -h   This help text.\n"
1874       "  -p=? The package cache.\n"
1875       "  -s=? The source cache.\n"
1876       "  -q   Disable progress indicator.\n"
1877       "  -i   Show only important deps for the unmet command.\n"
1878       "  -c=? Read this configuration file\n"
1879       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n"
1880       "See the apt-cache(8) and apt.conf(5) manual pages for more information.\n");
1881    return true;
1882 }
1883                                                                         /*}}}*/
1884 int main(int argc,const char *argv[])                                   /*{{{*/
1885 {
1886    CommandLine::Dispatch Cmds[] =  {{"help",&ShowHelp},
1887                                     {"gencaches",&GenCaches},
1888                                     {"showsrc",&ShowSrcPackage},
1889                                     {"showpkg",&DumpPackage},
1890                                     {"stats",&Stats},
1891                                     {"dump",&Dump},
1892                                     {"dumpavail",&DumpAvail},
1893                                     {"unmet",&UnMet},
1894                                     {"search",&Search},
1895                                     {"depends",&Depends},
1896                                     {"rdepends",&RDepends},
1897                                     {"dotty",&Dotty},
1898                                     {"xvcg",&XVcg},
1899                                     {"show",&ShowPackage},
1900                                     {"pkgnames",&ShowPkgNames},
1901                                     {"showauto",&ShowAuto},
1902                                     {"policy",&Policy},
1903                                     {"madison",&Madison},
1904                                     {0,0}};
1905
1906    std::vector<CommandLine::Args> Args = getCommandArgs("apt-cache", CommandLine::GetCommand(Cmds, argc, argv));
1907
1908    // Set up gettext support
1909    setlocale(LC_ALL,"");
1910    textdomain(PACKAGE);
1911
1912    // Parse the command line and initialize the package library
1913    CommandLine CmdL;
1914    ParseCommandLine(CmdL, Cmds, Args.data(), &_config, &_system, argc, argv, ShowHelp);
1915
1916    InitOutput();
1917
1918    if (_config->Exists("APT::Cache::Generate") == true)
1919       _config->Set("pkgCacheFile::Generate", _config->FindB("APT::Cache::Generate", true));
1920
1921    // Match the operation
1922    CmdL.DispatchArg(Cmds);
1923
1924    // Print any errors or warnings found during parsing
1925    bool const Errors = _error->PendingError();
1926    if (_config->FindI("quiet",0) > 0)
1927       _error->DumpErrors();
1928    else
1929       _error->DumpErrors(GlobalError::DEBUG);
1930    return Errors == true ? 100 : 0;
1931 }
1932                                                                         /*}}}*/