cmdline/apt-cache.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-cache.cc,v 1.59 2002/11/09 22:47:19 doogie 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 <apt-pkg/error.h>
  17 #include <apt-pkg/pkgcachegen.h>
  18 #include <apt-pkg/init.h>
  19 #include <apt-pkg/progress.h>
  20 #include <apt-pkg/sourcelist.h>
  21 #include <apt-pkg/cmndline.h>
  22 #include <apt-pkg/strutl.h>
  23 #include <apt-pkg/pkgrecords.h>
  24 #include <apt-pkg/srcrecords.h>
  25 #include <apt-pkg/version.h>
  26 #include <apt-pkg/policy.h>
  27 #include <apt-pkg/tagfile.h>
  28 #include <apt-pkg/algorithms.h>
  29 #include <apt-pkg/sptr.h>
  30
  31 #include <config.h>
  32 #include <apti18n.h>
  33
  34 #include <locale.h>
  35 #include <iostream>
  36 #include <unistd.h>
  37 #include <errno.h>
  38 #include <regex.h>
  39 #include <stdio.h>
  40                                                                         /*}}}*/
  41
  42 pkgCache *GCache = 0;
  43 pkgSourceList *SrcList = 0;
  44
  45 // LocalitySort - Sort a version list by package file locality          /*{{{*/
  46 // ---------------------------------------------------------------------
  47 /* */
  48 int LocalityCompare(const void *a, const void *b)
  49 {
  50    pkgCache::VerFile *A = *(pkgCache::VerFile **)a;
  51    pkgCache::VerFile *B = *(pkgCache::VerFile **)b;
  52
  53    if (A == 0 && B == 0)
  54       return 0;
  55    if (A == 0)
  56       return 1;
  57    if (B == 0)
  58       return -1;
  59
  60    if (A->File == B->File)
  61       return A->Offset - B->Offset;
  62    return A->File - B->File;
  63 }
  64
  65 void LocalitySort(pkgCache::VerFile **begin,
  66                   unsigned long Count,size_t Size)
  67 {
  68    qsort(begin,Count,Size,LocalityCompare);
  69 }
  70                                                                         /*}}}*/
  71 // UnMet - Show unmet dependencies                                      /*{{{*/
  72 // ---------------------------------------------------------------------
  73 /* */
  74 bool UnMet(CommandLine &CmdL)
  75 {
  76    pkgCache &Cache = *GCache;
  77    bool Important = _config->FindB("APT::Cache::Important",false);
  78
  79    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
  80    {
  81       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; V++)
  82       {
  83          bool Header = false;
  84          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false;)
  85          {
  86             // Collect or groups
  87             pkgCache::DepIterator Start;
  88             pkgCache::DepIterator End;
  89             D.GlobOr(Start,End);
  90
  91             // Skip conflicts and replaces
  92             if (End->Type != pkgCache::Dep::PreDepends &&
  93                 End->Type != pkgCache::Dep::Depends &&
  94                 End->Type != pkgCache::Dep::Suggests &&
  95                 End->Type != pkgCache::Dep::Recommends)
  96                continue;
  97
  98             // Important deps only
  99             if (Important == true)
 100                if (End->Type != pkgCache::Dep::PreDepends &&
 101                    End->Type != pkgCache::Dep::Depends)
 102                   continue;
 103
 104             // Verify the or group
 105             bool OK = false;
 106             pkgCache::DepIterator RealStart = Start;
 107             do
 108             {
 109                // See if this dep is Ok
 110                pkgCache::Version **VList = Start.AllTargets();
 111                if (*VList != 0)
 112                {
 113                   OK = true;
 114                   delete [] VList;
 115                   break;
 116                }
 117                delete [] VList;
 118
 119                if (Start == End)
 120                   break;
 121                Start++;
 122             }
 123             while (1);
 124
 125             // The group is OK
 126             if (OK == true)
 127                continue;
 128
 129             // Oops, it failed..
 130             if (Header == false)
 131                ioprintf(cout,_("Package %s version %s has an unmet dep:\n"),
 132                         P.Name(),V.VerStr());
 133             Header = true;
 134
 135             // Print out the dep type
 136             cout << " " << End.DepType() << ": ";
 137
 138             // Show the group
 139             Start = RealStart;
 140             do
 141             {
 142                cout << Start.TargetPkg().Name();
 143                if (Start.TargetVer() != 0)
 144                   cout << " (" << Start.CompType() << " " << Start.TargetVer() <<
 145                   ")";
 146                if (Start == End)
 147                   break;
 148                cout << " | ";
 149                Start++;
 150             }
 151             while (1);
 152
 153             cout << endl;
 154          }
 155       }
 156    }
 157    return true;
 158 }
 159                                                                         /*}}}*/
 160 // DumpPackage - Show a dump of a package record                        /*{{{*/
 161 // ---------------------------------------------------------------------
 162 /* */
 163 bool DumpPackage(CommandLine &CmdL)
 164 {
 165    pkgCache &Cache = *GCache;
 166    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 167    {
 168       pkgCache::PkgIterator Pkg = Cache.FindPkg(*I);
 169       if (Pkg.end() == true)
 170       {
 171          _error->Warning(_("Unable to locate package %s"),*I);
 172          continue;
 173       }
 174
 175       cout << "Package: " << Pkg.Name() << endl;
 176       cout << "Versions: " << endl;
 177       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; Cur++)
 178       {
 179          cout << Cur.VerStr();
 180          for (pkgCache::VerFileIterator Vf = Cur.FileList(); Vf.end() == false; Vf++)
 181             cout << "(" << Vf.File().FileName() << ")";
 182          cout << endl;
 183       }
 184
 185       cout << endl;
 186
 187       cout << "Reverse Depends: " << endl;
 188       for (pkgCache::DepIterator D = Pkg.RevDependsList(); D.end() != true; D++)
 189       {
 190          cout << "  " << D.ParentPkg().Name() << ',' << D.TargetPkg().Name();
 191          if (D->Version != 0)
 192             cout << ' ' << DeNull(D.TargetVer()) << endl;
 193          else
 194             cout << endl;
 195       }
 196
 197       cout << "Dependencies: " << endl;
 198       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; Cur++)
 199       {
 200          cout << Cur.VerStr() << " - ";
 201          for (pkgCache::DepIterator Dep = Cur.DependsList(); Dep.end() != true; Dep++)
 202             cout << Dep.TargetPkg().Name() << " (" << (int)Dep->CompareOp << " " << DeNull(Dep.TargetVer()) << ") ";
 203          cout << endl;
 204       }
 205
 206       cout << "Provides: " << endl;
 207       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; Cur++)
 208       {
 209          cout << Cur.VerStr() << " - ";
 210          for (pkgCache::PrvIterator Prv = Cur.ProvidesList(); Prv.end() != true; Prv++)
 211             cout << Prv.ParentPkg().Name() << " ";
 212          cout << endl;
 213       }
 214       cout << "Reverse Provides: " << endl;
 215       for (pkgCache::PrvIterator Prv = Pkg.ProvidesList(); Prv.end() != true; Prv++)
 216          cout << Prv.OwnerPkg().Name() << " " << Prv.OwnerVer().VerStr() << endl;
 217    }
 218
 219    return true;
 220 }
 221                                                                         /*}}}*/
 222 // Stats - Dump some nice statistics                                    /*{{{*/
 223 // ---------------------------------------------------------------------
 224 /* */
 225 bool Stats(CommandLine &Cmd)
 226 {
 227    pkgCache &Cache = *GCache;
 228    cout << _("Total Package Names : ") << Cache.Head().PackageCount << " (" <<
 229       SizeToStr(Cache.Head().PackageCount*Cache.Head().PackageSz) << ')' << endl;
 230
 231    int Normal = 0;
 232    int Virtual = 0;
 233    int NVirt = 0;
 234    int DVirt = 0;
 235    int Missing = 0;
 236    pkgCache::PkgIterator I = Cache.PkgBegin();
 237    for (;I.end() != true; I++)
 238    {
 239       if (I->VersionList != 0 && I->ProvidesList == 0)
 240       {
 241          Normal++;
 242          continue;
 243       }
 244
 245       if (I->VersionList != 0 && I->ProvidesList != 0)
 246       {
 247          NVirt++;
 248          continue;
 249       }
 250
 251       if (I->VersionList == 0 && I->ProvidesList != 0)
 252       {
 253          // Only 1 provides
 254          if (I.ProvidesList()->NextProvides == 0)
 255          {
 256             DVirt++;
 257          }
 258          else
 259             Virtual++;
 260          continue;
 261       }
 262       if (I->VersionList == 0 && I->ProvidesList == 0)
 263       {
 264          Missing++;
 265          continue;
 266       }
 267    }
 268    cout << _("  Normal Packages: ") << Normal << endl;
 269    cout << _("  Pure Virtual Packages: ") << Virtual << endl;
 270    cout << _("  Single Virtual Packages: ") << DVirt << endl;
 271    cout << _("  Mixed Virtual Packages: ") << NVirt << endl;
 272    cout << _("  Missing: ") << Missing << endl;
 273
 274    cout << _("Total Distinct Versions: ") << Cache.Head().VersionCount << " (" <<
 275       SizeToStr(Cache.Head().VersionCount*Cache.Head().VersionSz) << ')' << endl;
 276    cout << _("Total Dependencies: ") << Cache.Head().DependsCount << " (" <<
 277       SizeToStr(Cache.Head().DependsCount*Cache.Head().DependencySz) << ')' << endl;
 278
 279    cout << _("Total Ver/File relations: ") << Cache.Head().VerFileCount << " (" <<
 280       SizeToStr(Cache.Head().VerFileCount*Cache.Head().VerFileSz) << ')' << endl;
 281    cout << _("Total Provides Mappings: ") << Cache.Head().ProvidesCount << " (" <<
 282       SizeToStr(Cache.Head().ProvidesCount*Cache.Head().ProvidesSz) << ')' << endl;
 283
 284    // String list stats
 285    unsigned long Size = 0;
 286    unsigned long Count = 0;
 287    for (pkgCache::StringItem *I = Cache.StringItemP + Cache.Head().StringList;
 288         I!= Cache.StringItemP; I = Cache.StringItemP + I->NextItem)
 289    {
 290       Count++;
 291       Size += strlen(Cache.StrP + I->String) + 1;
 292    }
 293    cout << _("Total Globbed Strings: ") << Count << " (" << SizeToStr(Size) << ')' << endl;
 294
 295    unsigned long DepVerSize = 0;
 296    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
 297    {
 298       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; V++)
 299       {
 300          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; D++)
 301          {
 302             if (D->Version != 0)
 303                DepVerSize += strlen(D.TargetVer()) + 1;
 304          }
 305       }
 306    }
 307    cout << _("Total Dependency Version space: ") << SizeToStr(DepVerSize) << endl;
 308
 309    unsigned long Slack = 0;
 310    for (int I = 0; I != 7; I++)
 311       Slack += Cache.Head().Pools[I].ItemSize*Cache.Head().Pools[I].Count;
 312    cout << _("Total Slack space: ") << SizeToStr(Slack) << endl;
 313
 314    unsigned long Total = 0;
 315    Total = Slack + Size + Cache.Head().DependsCount*Cache.Head().DependencySz +
 316            Cache.Head().VersionCount*Cache.Head().VersionSz +
 317            Cache.Head().PackageCount*Cache.Head().PackageSz +
 318            Cache.Head().VerFileCount*Cache.Head().VerFileSz +
 319            Cache.Head().ProvidesCount*Cache.Head().ProvidesSz;
 320    cout << _("Total Space Accounted for: ") << SizeToStr(Total) << endl;
 321
 322    return true;
 323 }
 324                                                                         /*}}}*/
 325 // Dump - show everything                                               /*{{{*/
 326 // ---------------------------------------------------------------------
 327 /* This is worthless except fer debugging things */
 328 bool Dump(CommandLine &Cmd)
 329 {
 330    pkgCache &Cache = *GCache;
 331    cout << "Using Versioning System: " << Cache.VS->Label << endl;
 332
 333    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
 334    {
 335       cout << "Package: " << P.Name() << endl;
 336       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; V++)
 337       {
 338          cout << " Version: " << V.VerStr() << endl;
 339          cout << "     File: " << V.FileList().File().FileName() << endl;
 340          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; D++)
 341             cout << "  Depends: " << D.TargetPkg().Name() << ' ' <<
 342                              DeNull(D.TargetVer()) << endl;
 343       }
 344    }
 345
 346    for (pkgCache::PkgFileIterator F = Cache.FileBegin(); F.end() == false; F++)
 347    {
 348       cout << "File: " << F.FileName() << endl;
 349       cout << " Type: " << F.IndexType() << endl;
 350       cout << " Size: " << F->Size << endl;
 351       cout << " ID: " << F->ID << endl;
 352       cout << " Flags: " << F->Flags << endl;
 353       cout << " Time: " << TimeRFC1123(F->mtime) << endl;
 354       cout << " Archive: " << DeNull(F.Archive()) << endl;
 355       cout << " Component: " << DeNull(F.Component()) << endl;
 356       cout << " Version: " << DeNull(F.Version()) << endl;
 357       cout << " Origin: " << DeNull(F.Origin()) << endl;
 358       cout << " Site: " << DeNull(F.Site()) << endl;
 359       cout << " Label: " << DeNull(F.Label()) << endl;
 360       cout << " Architecture: " << DeNull(F.Architecture()) << endl;
 361    }
 362
 363    return true;
 364 }
 365                                                                         /*}}}*/
 366 // DumpAvail - Print out the available list                             /*{{{*/
 367 // ---------------------------------------------------------------------
 368 /* This is needed to make dpkg --merge happy.. I spent a bit of time to
 369    make this run really fast, perhaps I went a little overboard.. */
 370 bool DumpAvail(CommandLine &Cmd)
 371 {
 372    pkgCache &Cache = *GCache;
 373
 374    pkgPolicy Plcy(&Cache);
 375    if (ReadPinFile(Plcy) == false)
 376       return false;
 377
 378    unsigned long Count = Cache.HeaderP->PackageCount+1;
 379    pkgCache::VerFile **VFList = new pkgCache::VerFile *[Count];
 380    memset(VFList,0,sizeof(*VFList)*Count);
 381
 382    // Map versions that we want to write out onto the VerList array.
 383    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
 384    {
 385       if (P->VersionList == 0)
 386          continue;
 387
 388       /* Find the proper version to use. If the policy says there are no
 389          possible selections we return the installed version, if available..
 390          This prevents dselect from making it obsolete. */
 391       pkgCache::VerIterator V = Plcy.GetCandidateVer(P);
 392       if (V.end() == true)
 393       {
 394          if (P->CurrentVer == 0)
 395             continue;
 396          V = P.CurrentVer();
 397       }
 398
 399       pkgCache::VerFileIterator VF = V.FileList();
 400       for (; VF.end() == false ; VF++)
 401          if ((VF.File()->Flags & pkgCache::Flag::NotSource) == 0)
 402             break;
 403
 404       /* Okay, here we have a bit of a problem.. The policy has selected the
 405          currently installed package - however it only exists in the
 406          status file.. We need to write out something or dselect will mark
 407          the package as obsolete! Thus we emit the status file entry, but
 408          below we remove the status line to make it valid for the
 409          available file. However! We only do this if their do exist *any*
 410          non-source versions of the package - that way the dselect obsolete
 411          handling works OK. */
 412       if (VF.end() == true)
 413       {
 414          for (pkgCache::VerIterator Cur = P.VersionList(); Cur.end() != true; Cur++)
 415          {
 416             for (VF = Cur.FileList(); VF.end() == false; VF++)
 417             {
 418                if ((VF.File()->Flags & pkgCache::Flag::NotSource) == 0)
 419                {
 420                   VF = V.FileList();
 421                   break;
 422                }
 423             }
 424
 425             if (VF.end() == false)
 426                break;
 427          }
 428       }
 429
 430       VFList[P->ID] = VF;
 431    }
 432
 433    LocalitySort(VFList,Count,sizeof(*VFList));
 434
 435    // Iterate over all the package files and write them out.
 436    char *Buffer = new char[Cache.HeaderP->MaxVerFileSize+10];
 437    for (pkgCache::VerFile **J = VFList; *J != 0;)
 438    {
 439       pkgCache::PkgFileIterator File(Cache,(*J)->File + Cache.PkgFileP);
 440       if (File.IsOk() == false)
 441       {
 442          _error->Error(_("Package file %s is out of sync."),File.FileName());
 443          break;
 444       }
 445
 446       FileFd PkgF(File.FileName(),FileFd::ReadOnly);
 447       if (_error->PendingError() == true)
 448          break;
 449
 450       /* Write all of the records from this package file, since we
 451          already did locality sorting we can now just seek through the
 452          file in read order. We apply 1 more optimization here, since often
 453          there will be < 1 byte gaps between records (for the \n) we read that
 454          into the next buffer and offset a bit.. */
 455       unsigned long Pos = 0;
 456       for (; *J != 0; J++)
 457       {
 458          if ((*J)->File + Cache.PkgFileP != File)
 459             break;
 460
 461          const pkgCache::VerFile &VF = **J;
 462
 463          // Read the record and then write it out again.
 464          unsigned long Jitter = VF.Offset - Pos;
 465          if (Jitter > 8)
 466          {
 467             if (PkgF.Seek(VF.Offset) == false)
 468                break;
 469             Jitter = 0;
 470          }
 471
 472          if (PkgF.Read(Buffer,VF.Size + Jitter) == false)
 473             break;
 474          Buffer[VF.Size + Jitter] = '\n';
 475
 476          // See above..
 477          if ((File->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource)
 478          {
 479             pkgTagSection Tags;
 480             TFRewriteData RW[] = {{"Status",0},{"Config-Version",0},{}};
 481             const char *Zero = 0;
 482             if (Tags.Scan(Buffer+Jitter,VF.Size+1) == false ||
 483                 TFRewrite(stdout,Tags,&Zero,RW) == false)
 484             {
 485                _error->Error("Internal Error, Unable to parse a package record");
 486                break;
 487             }
 488             fputc('\n',stdout);
 489          }
 490          else
 491          {
 492             if (fwrite(Buffer+Jitter,VF.Size+1,1,stdout) != 1)
 493                break;
 494          }
 495
 496          Pos = VF.Offset + VF.Size;
 497       }
 498
 499       fflush(stdout);
 500       if (_error->PendingError() == true)
 501          break;
 502    }
 503
 504    delete [] Buffer;
 505    delete [] VFList;
 506    return !_error->PendingError();
 507 }
 508                                                                         /*}}}*/
 509 // Depends - Print out a dependency tree                                /*{{{*/
 510 // ---------------------------------------------------------------------
 511 /* */
 512 bool Depends(CommandLine &CmdL)
 513 {
 514    pkgCache &Cache = *GCache;
 515    SPtrArray<unsigned> Colours = new unsigned[Cache.Head().PackageCount];
 516    memset(Colours,0,sizeof(*Colours)*Cache.Head().PackageCount);
 517
 518    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 519    {
 520       pkgCache::PkgIterator Pkg = Cache.FindPkg(*I);
 521       if (Pkg.end() == true)
 522       {
 523          _error->Warning(_("Unable to locate package %s"),*I);
 524          continue;
 525       }
 526       Colours[Pkg->ID] = 1;
 527    }
 528
 529    bool Recurse = _config->FindB("APT::Cache::RecurseDepends",false);
 530    bool DidSomething;
 531    do
 532    {
 533       DidSomething = false;
 534       for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; Pkg++)
 535       {
 536          if (Colours[Pkg->ID] != 1)
 537             continue;
 538          Colours[Pkg->ID] = 2;
 539          DidSomething = true;
 540
 541          pkgCache::VerIterator Ver = Pkg.VersionList();
 542          if (Ver.end() == true)
 543          {
 544             cout << '<' << Pkg.Name() << '>' << endl;
 545             continue;
 546          }
 547
 548          cout << Pkg.Name() << endl;
 549
 550          for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; D++)
 551          {
 552             if ((D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or)
 553                cout << " |";
 554             else
 555                cout << "  ";
 556
 557             // Show the package
 558             pkgCache::PkgIterator Trg = D.TargetPkg();
 559             if (Trg->VersionList == 0)
 560                cout << D.DepType() << ": <" << Trg.Name() << ">" << endl;
 561             else
 562                cout << D.DepType() << ": " << Trg.Name() << endl;
 563
 564             if (Recurse == true)
 565                Colours[D.TargetPkg()->ID]++;
 566
 567             // Display all solutions
 568             SPtrArray<pkgCache::Version *> List = D.AllTargets();
 569             pkgPrioSortList(Cache,List);
 570             for (pkgCache::Version **I = List; *I != 0; I++)
 571             {
 572                pkgCache::VerIterator V(Cache,*I);
 573                if (V != Cache.VerP + V.ParentPkg()->VersionList ||
 574                    V->ParentPkg == D->Package)
 575                   continue;
 576                cout << "    " << V.ParentPkg().Name() << endl;
 577
 578                if (Recurse == true)
 579                   Colours[D.ParentPkg()->ID]++;
 580             }
 581          }
 582       }
 583    }
 584    while (DidSomething == true);
 585
 586    return true;
 587 }
 588                                                                         /*}}}*/
 589 // Dotty - Generate a graph for Dotty                                   /*{{{*/
 590 // ---------------------------------------------------------------------
 591 /* Dotty is the graphvis program for generating graphs. It is a fairly
 592    simple queuing algorithm that just writes dependencies and nodes.
 593    http://www.research.att.com/sw/tools/graphviz/ */
 594 bool Dotty(CommandLine &CmdL)
 595 {
 596    pkgCache &Cache = *GCache;
 597    bool GivenOnly = _config->FindB("APT::Cache::GivenOnly",false);
 598
 599    /* Normal packages are boxes
 600       Pure Provides are triangles
 601       Mixed are diamonds
 602       Hexagons are missing packages*/
 603    const char *Shapes[] = {"hexagon","triangle","box","diamond"};
 604
 605    /* Initialize the list of packages to show.
 606       1 = To Show
 607       2 = To Show no recurse
 608       3 = Emitted no recurse
 609       4 = Emitted
 610       0 = None */
 611    enum States {None=0, ToShow, ToShowNR, DoneNR, Done};
 612    enum TheFlags {ForceNR=(1<<0)};
 613    unsigned char *Show = new unsigned char[Cache.Head().PackageCount];
 614    unsigned char *Flags = new unsigned char[Cache.Head().PackageCount];
 615    unsigned char *ShapeMap = new unsigned char[Cache.Head().PackageCount];
 616
 617    // Show everything if no arguments given
 618    if (CmdL.FileList[1] == 0)
 619       for (unsigned long I = 0; I != Cache.Head().PackageCount; I++)
 620          Show[I] = ToShow;
 621    else
 622       for (unsigned long I = 0; I != Cache.Head().PackageCount; I++)
 623          Show[I] = None;
 624    memset(Flags,0,sizeof(*Flags)*Cache.Head().PackageCount);
 625
 626    // Map the shapes
 627    for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; Pkg++)
 628    {
 629       if (Pkg->VersionList == 0)
 630       {
 631          // Missing
 632          if (Pkg->ProvidesList == 0)
 633             ShapeMap[Pkg->ID] = 0;
 634          else
 635             ShapeMap[Pkg->ID] = 1;
 636       }
 637       else
 638       {
 639          // Normal
 640          if (Pkg->ProvidesList == 0)
 641             ShapeMap[Pkg->ID] = 2;
 642          else
 643             ShapeMap[Pkg->ID] = 3;
 644       }
 645    }
 646
 647    // Load the list of packages from the command line into the show list
 648    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 649    {
 650       // Process per-package flags
 651       string P = *I;
 652       bool Force = false;
 653       if (P.length() > 3)
 654       {
 655          if (P.end()[-1] == '^')
 656          {
 657             Force = true;
 658             P.erase(P.end()-1);
 659          }
 660
 661          if (P.end()[-1] == ',')
 662             P.erase(P.end()-1);
 663       }
 664
 665       // Locate the package
 666       pkgCache::PkgIterator Pkg = Cache.FindPkg(P);
 667       if (Pkg.end() == true)
 668       {
 669          _error->Warning(_("Unable to locate package %s"),*I);
 670          continue;
 671       }
 672       Show[Pkg->ID] = ToShow;
 673
 674       if (Force == true)
 675          Flags[Pkg->ID] |= ForceNR;
 676    }
 677
 678    // Little header
 679    printf("digraph packages {\n");
 680    printf("concentrate=true;\n");
 681    printf("size=\"30,40\";\n");
 682
 683    bool Act = true;
 684    while (Act == true)
 685    {
 686       Act = false;
 687       for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; Pkg++)
 688       {
 689          // See we need to show this package
 690          if (Show[Pkg->ID] == None || Show[Pkg->ID] >= DoneNR)
 691             continue;
 692
 693          // Colour as done
 694          if (Show[Pkg->ID] == ToShowNR || (Flags[Pkg->ID] & ForceNR) == ForceNR)
 695          {
 696             // Pure Provides and missing packages have no deps!
 697             if (ShapeMap[Pkg->ID] == 0 || ShapeMap[Pkg->ID] == 1)
 698                Show[Pkg->ID] = Done;
 699             else
 700                Show[Pkg->ID] = DoneNR;
 701          }
 702          else
 703             Show[Pkg->ID] = Done;
 704          Act = true;
 705
 706          // No deps to map out
 707          if (Pkg->VersionList == 0 || Show[Pkg->ID] == DoneNR)
 708             continue;
 709
 710          pkgCache::VerIterator Ver = Pkg.VersionList();
 711          for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; D++)
 712          {
 713             // See if anything can meet this dep
 714             // Walk along the actual package providing versions
 715             bool Hit = false;
 716             pkgCache::PkgIterator DPkg = D.TargetPkg();
 717             for (pkgCache::VerIterator I = DPkg.VersionList();
 718                       I.end() == false && Hit == false; I++)
 719             {
 720                if (Cache.VS->CheckDep(I.VerStr(),D->CompareOp,D.TargetVer()) == true)
 721                   Hit = true;
 722             }
 723
 724             // Follow all provides
 725             for (pkgCache::PrvIterator I = DPkg.ProvidesList();
 726                       I.end() == false && Hit == false; I++)
 727             {
 728                if (Cache.VS->CheckDep(I.ProvideVersion(),D->CompareOp,D.TargetVer()) == false)
 729                   Hit = true;
 730             }
 731
 732             // Only graph critical deps
 733             if (D.IsCritical() == true)
 734             {
 735                printf("\"%s\" -> \"%s\"",Pkg.Name(),D.TargetPkg().Name());
 736
 737                // Colour the node for recursion
 738                if (Show[D.TargetPkg()->ID] <= DoneNR)
 739                {
 740                   /* If a conflicts does not meet anything in the database
 741                      then show the relation but do not recurse */
 742                   if (Hit == false &&
 743                       (D->Type == pkgCache::Dep::Conflicts ||
 744                        D->Type == pkgCache::Dep::Obsoletes))
 745                   {
 746                      if (Show[D.TargetPkg()->ID] == None &&
 747                          Show[D.TargetPkg()->ID] != ToShow)
 748                         Show[D.TargetPkg()->ID] = ToShowNR;
 749                   }
 750                   else
 751                   {
 752                      if (GivenOnly == true && Show[D.TargetPkg()->ID] != ToShow)
 753                         Show[D.TargetPkg()->ID] = ToShowNR;
 754                      else
 755                         Show[D.TargetPkg()->ID] = ToShow;
 756                   }
 757                }
 758
 759                // Edge colour
 760                switch(D->Type)
 761                {
 762                   case pkgCache::Dep::Conflicts:
 763                   case pkgCache::Dep::Obsoletes:
 764                   printf("[color=springgreen];\n");
 765                   break;
 766
 767                   case pkgCache::Dep::PreDepends:
 768                   printf("[color=blue];\n");
 769                   break;
 770
 771                   default:
 772                   printf(";\n");
 773                   break;
 774                }
 775             }
 776          }
 777       }
 778    }
 779
 780    /* Draw the box colours after the fact since we can not tell what colour
 781       they should be until everything is finished drawing */
 782    for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; Pkg++)
 783    {
 784       if (Show[Pkg->ID] < DoneNR)
 785          continue;
 786
 787       // Orange box for early recursion stoppage
 788       if (Show[Pkg->ID] == DoneNR)
 789          printf("\"%s\" [color=orange,shape=%s];\n",Pkg.Name(),
 790                 Shapes[ShapeMap[Pkg->ID]]);
 791       else
 792          printf("\"%s\" [shape=%s];\n",Pkg.Name(),
 793                 Shapes[ShapeMap[Pkg->ID]]);
 794    }
 795
 796    printf("}\n");
 797    return true;
 798 }
 799                                                                         /*}}}*/
 800 // DoAdd - Perform an adding operation                                  /*{{{*/
 801 // ---------------------------------------------------------------------
 802 /* */
 803 bool DoAdd(CommandLine &CmdL)
 804 {
 805    return _error->Error("Unimplemented");
 806 #if 0
 807    // Make sure there is at least one argument
 808    if (CmdL.FileSize() <= 1)
 809       return _error->Error("You must give at least one file name");
 810
 811    // Open the cache
 812    FileFd CacheF(_config->FindFile("Dir::Cache::pkgcache"),FileFd::WriteAny);
 813    if (_error->PendingError() == true)
 814       return false;
 815
 816    DynamicMMap Map(CacheF,MMap::Public);
 817    if (_error->PendingError() == true)
 818       return false;
 819
 820    OpTextProgress Progress(*_config);
 821    pkgCacheGenerator Gen(Map,Progress);
 822    if (_error->PendingError() == true)
 823       return false;
 824
 825    unsigned long Length = CmdL.FileSize() - 1;
 826    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 827    {
 828       Progress.OverallProgress(I - CmdL.FileList,Length,1,"Generating cache");
 829       Progress.SubProgress(Length);
 830
 831       // Do the merge
 832       FileFd TagF(*I,FileFd::ReadOnly);
 833       debListParser Parser(TagF);
 834       if (_error->PendingError() == true)
 835          return _error->Error("Problem opening %s",*I);
 836
 837       if (Gen.SelectFile(*I,"") == false)
 838          return _error->Error("Problem with SelectFile");
 839
 840       if (Gen.MergeList(Parser) == false)
 841          return _error->Error("Problem with MergeList");
 842    }
 843
 844    Progress.Done();
 845    GCache = &Gen.GetCache();
 846    Stats(CmdL);
 847
 848    return true;
 849 #endif
 850 }
 851                                                                         /*}}}*/
 852 // DisplayRecord - Displays the complete record for the package         /*{{{*/
 853 // ---------------------------------------------------------------------
 854 /* This displays the package record from the proper package index file.
 855    It is not used by DumpAvail for performance reasons. */
 856 bool DisplayRecord(pkgCache::VerIterator V)
 857 {
 858    // Find an appropriate file
 859    pkgCache::VerFileIterator Vf = V.FileList();
 860    for (; Vf.end() == false; Vf++)
 861       if ((Vf.File()->Flags & pkgCache::Flag::NotSource) == 0)
 862          break;
 863    if (Vf.end() == true)
 864       Vf = V.FileList();
 865
 866    // Check and load the package list file
 867    pkgCache::PkgFileIterator I = Vf.File();
 868    if (I.IsOk() == false)
 869       return _error->Error(_("Package file %s is out of sync."),I.FileName());
 870
 871    FileFd PkgF(I.FileName(),FileFd::ReadOnly);
 872    if (_error->PendingError() == true)
 873       return false;
 874
 875    // Read the record and then write it out again.
 876    unsigned char *Buffer = new unsigned char[GCache->HeaderP->MaxVerFileSize+1];
 877    Buffer[V.FileList()->Size] = '\n';
 878    if (PkgF.Seek(V.FileList()->Offset) == false ||
 879        PkgF.Read(Buffer,V.FileList()->Size) == false ||
 880        write(STDOUT_FILENO,Buffer,V.FileList()->Size+1) != V.FileList()->Size+1)
 881    {
 882       delete [] Buffer;
 883       return false;
 884    }
 885
 886    delete [] Buffer;
 887
 888    return true;
 889 }
 890                                                                         /*}}}*/
 891 // Search - Perform a search                                            /*{{{*/
 892 // ---------------------------------------------------------------------
 893 /* This searches the package names and pacakge descriptions for a pattern */
 894 struct ExVerFile
 895 {
 896    pkgCache::VerFile *Vf;
 897    bool NameMatch;
 898 };
 899
 900 bool Search(CommandLine &CmdL)
 901 {
 902    pkgCache &Cache = *GCache;
 903    bool ShowFull = _config->FindB("APT::Cache::ShowFull",false);
 904    bool NamesOnly = _config->FindB("APT::Cache::NamesOnly",false);
 905    unsigned NumPatterns = CmdL.FileSize() -1;
 906
 907    pkgDepCache::Policy Plcy;
 908
 909    // Make sure there is at least one argument
 910    if (NumPatterns < 1)
 911       return _error->Error(_("You must give exactly one pattern"));
 912
 913    // Compile the regex pattern
 914    regex_t *Patterns = new regex_t[NumPatterns];
 915    memset(Patterns,0,sizeof(*Patterns)*NumPatterns);
 916    for (unsigned I = 0; I != NumPatterns; I++)
 917    {
 918       if (regcomp(&Patterns[I],CmdL.FileList[I+1],REG_EXTENDED | REG_ICASE |
 919                   REG_NOSUB) != 0)
 920       {
 921          for (; I != 0; I--)
 922             regfree(&Patterns[I]);
 923          return _error->Error("Regex compilation error");
 924       }
 925    }
 926
 927    // Create the text record parser
 928    pkgRecords Recs(Cache);
 929    if (_error->PendingError() == true)
 930    {
 931       for (unsigned I = 0; I != NumPatterns; I++)
 932          regfree(&Patterns[I]);
 933       return false;
 934    }
 935
 936    ExVerFile *VFList = new ExVerFile[Cache.HeaderP->PackageCount+1];
 937    memset(VFList,0,sizeof(*VFList)*Cache.HeaderP->PackageCount+1);
 938
 939    // Map versions that we want to write out onto the VerList array.
 940    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
 941    {
 942       VFList[P->ID].NameMatch = NumPatterns != 0;
 943       for (unsigned I = 0; I != NumPatterns; I++)
 944       {
 945          if (regexec(&Patterns[I],P.Name(),0,0,0) == 0)
 946             VFList[P->ID].NameMatch &= true;
 947          else
 948             VFList[P->ID].NameMatch = false;
 949       }
 950
 951       // Doing names only, drop any that dont match..
 952       if (NamesOnly == true && VFList[P->ID].NameMatch == false)
 953          continue;
 954
 955       // Find the proper version to use.
 956       pkgCache::VerIterator V = Plcy.GetCandidateVer(P);
 957       if (V.end() == false)
 958          VFList[P->ID].Vf = V.FileList();
 959    }
 960
 961    // Include all the packages that provide matching names too
 962    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
 963    {
 964       if (VFList[P->ID].NameMatch == false)
 965          continue;
 966
 967       for (pkgCache::PrvIterator Prv = P.ProvidesList() ; Prv.end() == false; Prv++)
 968       {
 969          pkgCache::VerIterator V = Plcy.GetCandidateVer(Prv.OwnerPkg());
 970          if (V.end() == false)
 971          {
 972             VFList[Prv.OwnerPkg()->ID].Vf = V.FileList();
 973             VFList[Prv.OwnerPkg()->ID].NameMatch = true;
 974          }
 975       }
 976    }
 977
 978    LocalitySort(&VFList->Vf,Cache.HeaderP->PackageCount,sizeof(*VFList));
 979
 980    // Iterate over all the version records and check them
 981    for (ExVerFile *J = VFList; J->Vf != 0; J++)
 982    {
 983       pkgRecords::Parser &P = Recs.Lookup(pkgCache::VerFileIterator(Cache,J->Vf));
 984
 985       bool Match = true;
 986       if (J->NameMatch == false)
 987       {
 988          string LongDesc = P.LongDesc();
 989          Match = NumPatterns != 0;
 990          for (unsigned I = 0; I != NumPatterns; I++)
 991          {
 992             if (regexec(&Patterns[I],LongDesc.c_str(),0,0,0) == 0)
 993                Match &= true;
 994             else
 995                Match = false;
 996          }
 997       }
 998
 999       if (Match == true)
1000       {
1001          if (ShowFull == true)
1002          {
1003             const char *Start;
1004             const char *End;
1005             P.GetRec(Start,End);
1006             fwrite(Start,End-Start,1,stdout);
1007             putc('\n',stdout);
1008          }
1009          else
1010             printf("%s - %s\n",P.Name().c_str(),P.ShortDesc().c_str());
1011       }
1012    }
1013
1014    delete [] VFList;
1015    for (unsigned I = 0; I != NumPatterns; I++)
1016       regfree(&Patterns[I]);
1017    if (ferror(stdout))
1018        return _error->Error("Write to stdout failed");
1019    return true;
1020 }
1021                                                                         /*}}}*/
1022 // ShowPackage - Dump the package record to the screen                  /*{{{*/
1023 // ---------------------------------------------------------------------
1024 /* */
1025 bool ShowPackage(CommandLine &CmdL)
1026 {
1027    pkgCache &Cache = *GCache;
1028    pkgDepCache::Policy Plcy;
1029
1030    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
1031    {
1032       pkgCache::PkgIterator Pkg = Cache.FindPkg(*I);
1033       if (Pkg.end() == true)
1034       {
1035          _error->Warning(_("Unable to locate package %s"),*I);
1036          continue;
1037       }
1038
1039       // Find the proper version to use.
1040       if (_config->FindB("APT::Cache::AllVersions","true") == true)
1041       {
1042          pkgCache::VerIterator V;
1043          for (V = Pkg.VersionList(); V.end() == false; V++)
1044          {
1045             if (DisplayRecord(V) == false)
1046                return false;
1047          }
1048       }
1049       else
1050       {
1051          pkgCache::VerIterator V = Plcy.GetCandidateVer(Pkg);
1052          if (V.end() == true || V.FileList().end() == true)
1053             continue;
1054          if (DisplayRecord(V) == false)
1055             return false;
1056       }
1057    }
1058    return true;
1059 }
1060                                                                         /*}}}*/
1061 // ShowPkgNames - Show package names                                    /*{{{*/
1062 // ---------------------------------------------------------------------
1063 /* This does a prefix match on the first argument */
1064 bool ShowPkgNames(CommandLine &CmdL)
1065 {
1066    pkgCache &Cache = *GCache;
1067    pkgCache::PkgIterator I = Cache.PkgBegin();
1068    bool All = _config->FindB("APT::Cache::AllNames","false");
1069
1070    if (CmdL.FileList[1] != 0)
1071    {
1072       for (;I.end() != true; I++)
1073       {
1074          if (All == false && I->VersionList == 0)
1075             continue;
1076
1077          if (strncmp(I.Name(),CmdL.FileList[1],strlen(CmdL.FileList[1])) == 0)
1078             cout << I.Name() << endl;
1079       }
1080
1081       return true;
1082    }
1083
1084    // Show all pkgs
1085    for (;I.end() != true; I++)
1086    {
1087       if (All == false && I->VersionList == 0)
1088          continue;
1089       cout << I.Name() << endl;
1090    }
1091
1092    return true;
1093 }
1094                                                                         /*}}}*/
1095 // ShowSrcPackage - Show source package records                         /*{{{*/
1096 // ---------------------------------------------------------------------
1097 /* */
1098 bool ShowSrcPackage(CommandLine &CmdL)
1099 {
1100    pkgSourceList List;
1101    List.ReadMainList();
1102
1103    // Create the text record parsers
1104    pkgSrcRecords SrcRecs(List);
1105    if (_error->PendingError() == true)
1106       return false;
1107
1108    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
1109    {
1110       SrcRecs.Restart();
1111
1112       pkgSrcRecords::Parser *Parse;
1113       while ((Parse = SrcRecs.Find(*I,false)) != 0)
1114          cout << Parse->AsStr() << endl;;
1115    }
1116    return true;
1117 }
1118                                                                         /*}}}*/
1119 // Policy - Show the results of the preferences file                    /*{{{*/
1120 // ---------------------------------------------------------------------
1121 /* */
1122 bool Policy(CommandLine &CmdL)
1123 {
1124    if (SrcList == 0)
1125       return _error->Error("Generate must be enabled for this function");
1126
1127    pkgCache &Cache = *GCache;
1128    pkgPolicy Plcy(&Cache);
1129    if (ReadPinFile(Plcy) == false)
1130       return false;
1131
1132    // Print out all of the package files
1133    if (CmdL.FileList[1] == 0)
1134    {
1135       cout << _("Package Files:") << endl;
1136       for (pkgCache::PkgFileIterator F = Cache.FileBegin(); F.end() == false; F++)
1137       {
1138          // Locate the associated index files so we can derive a description
1139          pkgIndexFile *Indx;
1140          if (SrcList->FindIndex(F,Indx) == false &&
1141              _system->FindIndex(F,Indx) == false)
1142             return _error->Error(_("Cache is out of sync, can't x-ref a package file"));
1143          printf(_("%4i %s\n"),
1144                 Plcy.GetPriority(F),Indx->Describe(true).c_str());
1145
1146          // Print the reference information for the package
1147          string Str = F.RelStr();
1148          if (Str.empty() == false)
1149             printf("     release %s\n",F.RelStr().c_str());
1150          if (F.Site() != 0 && F.Site()[0] != 0)
1151             printf("     origin %s\n",F.Site());
1152       }
1153
1154       // Show any packages have explicit pins
1155       cout << _("Pinned Packages:") << endl;
1156       pkgCache::PkgIterator I = Cache.PkgBegin();
1157       for (;I.end() != true; I++)
1158       {
1159          if (Plcy.GetPriority(I) == 0)
1160             continue;
1161
1162          // Print the package name and the version we are forcing to
1163          cout << "     " << I.Name() << " -> ";
1164
1165          pkgCache::VerIterator V = Plcy.GetMatch(I);
1166          if (V.end() == true)
1167             cout << _("(not found)") << endl;
1168          else
1169             cout << V.VerStr() << endl;
1170       }
1171
1172       return true;
1173    }
1174
1175    // Print out detailed information for each package
1176    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
1177    {
1178       pkgCache::PkgIterator Pkg = Cache.FindPkg(*I);
1179       if (Pkg.end() == true)
1180       {
1181          _error->Warning(_("Unable to locate package %s"),*I);
1182          continue;
1183       }
1184
1185       cout << Pkg.Name() << ":" << endl;
1186
1187       // Installed version
1188       cout << _("  Installed: ");
1189       if (Pkg->CurrentVer == 0)
1190          cout << _("(none)") << endl;
1191       else
1192          cout << Pkg.CurrentVer().VerStr() << endl;
1193
1194       // Candidate Version
1195       cout << _("  Candidate: ");
1196       pkgCache::VerIterator V = Plcy.GetCandidateVer(Pkg);
1197       if (V.end() == true)
1198          cout << _("(none)") << endl;
1199       else
1200          cout << V.VerStr() << endl;
1201
1202       // Pinned version
1203       if (Plcy.GetPriority(Pkg) != 0)
1204       {
1205          cout << _("  Package Pin: ");
1206          V = Plcy.GetMatch(Pkg);
1207          if (V.end() == true)
1208             cout << _("(not found)") << endl;
1209          else
1210             cout << V.VerStr() << endl;
1211       }
1212
1213       // Show the priority tables
1214       cout << _("  Version Table:") << endl;
1215       for (V = Pkg.VersionList(); V.end() == false; V++)
1216       {
1217          if (Pkg.CurrentVer() == V)
1218             cout << " *** " << V.VerStr();
1219          else
1220             cout << "     " << V.VerStr();
1221          cout << " " << Plcy.GetPriority(Pkg) << endl;
1222          for (pkgCache::VerFileIterator VF = V.FileList(); VF.end() == false; VF++)
1223          {
1224             // Locate the associated index files so we can derive a description
1225             pkgIndexFile *Indx;
1226             if (SrcList->FindIndex(VF.File(),Indx) == false &&
1227                 _system->FindIndex(VF.File(),Indx) == false)
1228                return _error->Error(_("Cache is out of sync, can't x-ref a package file"));
1229             printf(_("       %4i %s\n"),Plcy.GetPriority(VF.File()),
1230                    Indx->Describe(true).c_str());
1231          }
1232       }
1233    }
1234
1235    return true;
1236 }
1237                                                                         /*}}}*/
1238 // GenCaches - Call the main cache generator                            /*{{{*/
1239 // ---------------------------------------------------------------------
1240 /* */
1241 bool GenCaches(CommandLine &Cmd)
1242 {
1243    OpTextProgress Progress(*_config);
1244
1245    pkgSourceList List;
1246    if (List.ReadMainList() == false)
1247       return false;
1248    return pkgMakeStatusCache(List,Progress);
1249 }
1250                                                                         /*}}}*/
1251 // ShowHelp - Show a help screen                                        /*{{{*/
1252 // ---------------------------------------------------------------------
1253 /* */
1254 bool ShowHelp(CommandLine &Cmd)
1255 {
1256    ioprintf(cout,_("%s %s for %s %s compiled on %s %s\n"),PACKAGE,VERSION,
1257             COMMON_OS,COMMON_CPU,__DATE__,__TIME__);
1258
1259    cout <<
1260     _("Usage: apt-cache [options] command\n"
1261       "       apt-cache [options] add file1 [file1 ...]\n"
1262       "       apt-cache [options] showpkg pkg1 [pkg2 ...]\n"
1263       "       apt-cache [options] showsrc pkg1 [pkg2 ...]\n"
1264       "\n"
1265       "apt-cache is a low-level tool used to manipulate APT's binary\n"
1266       "cache files, and query information from them\n"
1267       "\n"
1268       "Commands:\n"
1269       "   add - Add an package file to the source cache\n"
1270       "   gencaches - Build both the package and source cache\n"
1271       "   showpkg - Show some general information for a single package\n"
1272       "   showsrc - Show source records\n"
1273       "   stats - Show some basic statistics\n"
1274       "   dump - Show the entire file in a terse form\n"
1275       "   dumpavail - Print an available file to stdout\n"
1276       "   unmet - Show unmet dependencies\n"
1277       "   search - Search the package list for a regex pattern\n"
1278       "   show - Show a readable record for the package\n"
1279       "   depends - Show raw dependency information for a package\n"
1280       "   pkgnames - List the names of all packages\n"
1281       "   dotty - Generate package graphs for GraphVis\n"
1282       "   policy - Show policy settings\n"
1283       "\n"
1284       "Options:\n"
1285       "  -h   This help text.\n"
1286       "  -p=? The package cache.\n"
1287       "  -s=? The source cache.\n"
1288       "  -q   Disable progress indicator.\n"
1289       "  -i   Show only important deps for the unmet command.\n"
1290       "  -c=? Read this configuration file\n"
1291       "  -o=? Set an arbitary configuration option, eg -o dir::cache=/tmp\n"
1292       "See the apt-cache(8) and apt.conf(5) manual pages for more information.\n");
1293    return true;
1294 }
1295                                                                         /*}}}*/
1296 // CacheInitialize - Initialize things for apt-cache                    /*{{{*/
1297 // ---------------------------------------------------------------------
1298 /* */
1299 void CacheInitialize()
1300 {
1301    _config->Set("quiet",0);
1302    _config->Set("help",false);
1303 }
1304                                                                         /*}}}*/
1305
1306 int main(int argc,const char *argv[])
1307 {
1308    CommandLine::Args Args[] = {
1309       {'h',"help","help",0},
1310       {'v',"version","version",0},
1311       {'p',"pkg-cache","Dir::Cache::pkgcache",CommandLine::HasArg},
1312       {'s',"src-cache","Dir::Cache::srcpkgcache",CommandLine::HasArg},
1313       {'q',"quiet","quiet",CommandLine::IntLevel},
1314       {'i',"important","APT::Cache::Important",0},
1315       {'f',"full","APT::Cache::ShowFull",0},
1316       {'g',"generate","APT::Cache::Generate",0},
1317       {'a',"all-versions","APT::Cache::AllVersions",0},
1318       {0,"names-only","APT::Cache::NamesOnly",0},
1319       {'n',"all-names","APT::Cache::AllNames",0},
1320       {0,"recurse","APT::Cache::RecurseDepends",0},
1321       {'c',"config-file",0,CommandLine::ConfigFile},
1322       {'o',"option",0,CommandLine::ArbItem},
1323       {0,0,0,0}};
1324    CommandLine::Dispatch CmdsA[] = {{"help",&ShowHelp},
1325                                     {"add",&DoAdd},
1326                                     {"gencaches",&GenCaches},
1327                                     {"showsrc",&ShowSrcPackage},
1328                                     {0,0}};
1329    CommandLine::Dispatch CmdsB[] = {{"showpkg",&DumpPackage},
1330                                     {"stats",&Stats},
1331                                     {"dump",&Dump},
1332                                     {"dumpavail",&DumpAvail},
1333                                     {"unmet",&UnMet},
1334                                     {"search",&Search},
1335                                     {"depends",&Depends},
1336                                     {"dotty",&Dotty},
1337                                     {"show",&ShowPackage},
1338                                     {"pkgnames",&ShowPkgNames},
1339                                     {"policy",&Policy},
1340                                     {0,0}};
1341
1342    CacheInitialize();
1343
1344    // Set up gettext support
1345    setlocale(LC_ALL,"");
1346    textdomain(PACKAGE);
1347
1348    // Parse the command line and initialize the package library
1349    CommandLine CmdL(Args,_config);
1350    if (pkgInitConfig(*_config) == false ||
1351        CmdL.Parse(argc,argv) == false ||
1352        pkgInitSystem(*_config,_system) == false)
1353    {
1354       _error->DumpErrors();
1355       return 100;
1356    }
1357
1358    // See if the help should be shown
1359    if (_config->FindB("help") == true ||
1360        CmdL.FileSize() == 0)
1361    {
1362       ShowHelp(CmdL);
1363       return 0;
1364    }
1365
1366    // Deal with stdout not being a tty
1367    if (ttyname(STDOUT_FILENO) == 0 && _config->FindI("quiet",0) < 1)
1368       _config->Set("quiet","1");
1369
1370    if (CmdL.DispatchArg(CmdsA,false) == false && _error->PendingError() == false)
1371    {
1372       MMap *Map = 0;
1373       if (_config->FindB("APT::Cache::Generate",true) == false)
1374       {
1375          Map = new MMap(*new FileFd(_config->FindFile("Dir::Cache::pkgcache"),
1376                                     FileFd::ReadOnly),MMap::Public|MMap::ReadOnly);
1377       }
1378       else
1379       {
1380          // Open the cache file
1381          SrcList = new pkgSourceList;
1382          SrcList->ReadMainList();
1383
1384          // Generate it and map it
1385          OpProgress Prog;
1386          pkgMakeStatusCache(*SrcList,Prog,&Map,true);
1387       }
1388
1389       if (_error->PendingError() == false)
1390       {
1391          pkgCache Cache(Map);
1392          GCache = &Cache;
1393          if (_error->PendingError() == false)
1394             CmdL.DispatchArg(CmdsB);
1395       }
1396       delete Map;
1397    }
1398
1399    // Print any errors or warnings found during parsing
1400    if (_error->empty() == false)
1401    {
1402       bool Errors = _error->PendingError();
1403       _error->DumpErrors();
1404       return Errors == true?100:0;
1405    }
1406
1407    return 0;
1408 }