cmdline/apt-cache.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-cache.cc,v 1.32 1999/03/29 19:28:52 jgg 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. The
  10    only really usefull function right now is dumpavail which is used
  11    by the dselect method. Everything else is ment as a debug aide.
  12
  13    Returns 100 on failure, 0 on success.
  14
  15    ##################################################################### */
  16                                                                         /*}}}*/
  17 // Include Files                                                        /*{{{*/
  18 #include <apt-pkg/error.h>
  19 #include <apt-pkg/pkgcachegen.h>
  20 #include <apt-pkg/deblistparser.h>
  21 #include <apt-pkg/init.h>
  22 #include <apt-pkg/progress.h>
  23 #include <apt-pkg/sourcelist.h>
  24 #include <apt-pkg/cmndline.h>
  25 #include <apt-pkg/strutl.h>
  26 #include <apt-pkg/pkgrecords.h>
  27 #include <config.h>
  28
  29 #include <iostream.h>
  30 #include <unistd.h>
  31 #include <errno.h>
  32 #include <regex.h>
  33                                                                         /*}}}*/
  34
  35 pkgCache *GCache = 0;
  36
  37 // UnMet - Show unmet dependencies                                      /*{{{*/
  38 // ---------------------------------------------------------------------
  39 /* */
  40 bool UnMet(CommandLine &CmdL)
  41 {
  42    pkgCache &Cache = *GCache;
  43    bool Important = _config->FindB("APT::Cache::Important",false);
  44
  45    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
  46    {
  47       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; V++)
  48       {
  49          bool Header = false;
  50          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false;)
  51          {
  52             // Collect or groups
  53             pkgCache::DepIterator Start;
  54             pkgCache::DepIterator End;
  55             D.GlobOr(Start,End);
  56
  57 /*          cout << "s: Check " << Start.TargetPkg().Name() << ',' <<
  58                End.TargetPkg().Name() << endl;*/
  59
  60             // Skip conflicts and replaces
  61             if (End->Type != pkgCache::Dep::PreDepends &&
  62                 End->Type != pkgCache::Dep::Depends &&
  63                 End->Type != pkgCache::Dep::Suggests &&
  64                 End->Type != pkgCache::Dep::Recommends)
  65                continue;
  66
  67             // Important deps only
  68             if (Important == true)
  69                if (End->Type != pkgCache::Dep::PreDepends &&
  70                    End->Type != pkgCache::Dep::Depends)
  71                   continue;
  72
  73             // Verify the or group
  74             bool OK = false;
  75             pkgCache::DepIterator RealStart = Start;
  76             do
  77             {
  78                // See if this dep is Ok
  79                pkgCache::Version **VList = Start.AllTargets();
  80                if (*VList != 0)
  81                {
  82                   OK = true;
  83                   delete [] VList;
  84                   break;
  85                }
  86                delete [] VList;
  87
  88                if (Start == End)
  89                   break;
  90                Start++;
  91             }
  92             while (1);
  93
  94             // The group is OK
  95             if (OK == true)
  96                continue;
  97
  98             // Oops, it failed..
  99             if (Header == false)
 100                   cout << "Package " << P.Name() << " version " <<
 101                V.VerStr() << " has an unmet dep:" << endl;
 102             Header = true;
 103
 104             // Print out the dep type
 105             cout << " " << End.DepType() << ": ";
 106
 107             // Show the group
 108             Start = RealStart;
 109             do
 110             {
 111                cout << Start.TargetPkg().Name();
 112                if (Start.TargetVer() != 0)
 113                   cout << " (" << Start.CompType() << " " << Start.TargetVer() <<
 114                   ")";
 115                if (Start == End)
 116                   break;
 117                cout << " | ";
 118                Start++;
 119             }
 120             while (1);
 121
 122             cout << endl;
 123          }
 124       }
 125    }
 126    return true;
 127 }
 128                                                                         /*}}}*/
 129 // DumpPackage - Show a dump of a package record                        /*{{{*/
 130 // ---------------------------------------------------------------------
 131 /* */
 132 bool DumpPackage(CommandLine &CmdL)
 133 {
 134    pkgCache &Cache = *GCache;
 135    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 136    {
 137       pkgCache::PkgIterator Pkg = Cache.FindPkg(*I);
 138       if (Pkg.end() == true)
 139       {
 140          _error->Warning("Unable to locate package %s",*I);
 141          continue;
 142       }
 143
 144       cout << "Package: " << Pkg.Name() << endl;
 145       cout << "Versions: ";
 146       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; Cur++)
 147       {
 148          cout << Cur.VerStr();
 149          for (pkgCache::VerFileIterator Vf = Cur.FileList(); Vf.end() == false; Vf++)
 150             cout << "(" << Vf.File().FileName() << ")";
 151          cout << ',';
 152       }
 153
 154       cout << endl;
 155
 156       cout << "Reverse Depends: " << endl;
 157       for (pkgCache::DepIterator D = Pkg.RevDependsList(); D.end() != true; D++)
 158          cout << "  " << D.ParentPkg().Name() << ',' << D.TargetPkg().Name() << endl;
 159
 160       cout << "Dependencies: " << endl;
 161       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; Cur++)
 162       {
 163          cout << Cur.VerStr() << " - ";
 164          for (pkgCache::DepIterator Dep = Cur.DependsList(); Dep.end() != true; Dep++)
 165             cout << Dep.TargetPkg().Name() << " (" << (int)Dep->CompareOp << " " << Dep.TargetVer() << ") ";
 166          cout << endl;
 167       }
 168
 169       cout << "Provides: " << endl;
 170       for (pkgCache::VerIterator Cur = Pkg.VersionList(); Cur.end() != true; Cur++)
 171       {
 172          cout << Cur.VerStr() << " - ";
 173          for (pkgCache::PrvIterator Prv = Cur.ProvidesList(); Prv.end() != true; Prv++)
 174             cout << Prv.ParentPkg().Name() << " ";
 175          cout << endl;
 176       }
 177       cout << "Reverse Provides: " << endl;
 178       for (pkgCache::PrvIterator Prv = Pkg.ProvidesList(); Prv.end() != true; Prv++)
 179          cout << Prv.OwnerPkg().Name() << " " << Prv.OwnerVer().VerStr();
 180       cout << endl;
 181
 182    }
 183
 184    return true;
 185 }
 186                                                                         /*}}}*/
 187 // Stats - Dump some nice statistics                                    /*{{{*/
 188 // ---------------------------------------------------------------------
 189 /* */
 190 bool Stats(CommandLine &Cmd)
 191 {
 192    pkgCache &Cache = *GCache;
 193    cout << "Total Package Names : " << Cache.Head().PackageCount << " (" <<
 194       SizeToStr(Cache.Head().PackageCount*Cache.Head().PackageSz) << ')' << endl;
 195    pkgCache::PkgIterator I = Cache.PkgBegin();
 196
 197    int Normal = 0;
 198    int Virtual = 0;
 199    int NVirt = 0;
 200    int DVirt = 0;
 201    int Missing = 0;
 202    for (;I.end() != true; I++)
 203    {
 204       if (I->VersionList != 0 && I->ProvidesList == 0)
 205       {
 206          Normal++;
 207          continue;
 208       }
 209
 210       if (I->VersionList != 0 && I->ProvidesList != 0)
 211       {
 212          NVirt++;
 213          continue;
 214       }
 215
 216       if (I->VersionList == 0 && I->ProvidesList != 0)
 217       {
 218          // Only 1 provides
 219          if (I.ProvidesList()->NextProvides == 0)
 220          {
 221             DVirt++;
 222          }
 223          else
 224             Virtual++;
 225          continue;
 226       }
 227       if (I->VersionList == 0 && I->ProvidesList == 0)
 228       {
 229          Missing++;
 230          continue;
 231       }
 232    }
 233    cout << "  Normal Packages: " << Normal << endl;
 234    cout << "  Pure Virtual Packages: " << Virtual << endl;
 235    cout << "  Single Virtual Packages: " << DVirt << endl;
 236    cout << "  Mixed Virtual Packages: " << NVirt << endl;
 237    cout << "  Missing: " << Missing << endl;
 238
 239    cout << "Total Distinct Versions: " << Cache.Head().VersionCount << " (" <<
 240       SizeToStr(Cache.Head().VersionCount*Cache.Head().VersionSz) << ')' << endl;
 241    cout << "Total Dependencies: " << Cache.Head().DependsCount << " (" <<
 242       SizeToStr(Cache.Head().DependsCount*Cache.Head().DependencySz) << ')' << endl;
 243
 244    cout << "Total Ver/File relations: " << Cache.Head().VerFileCount << " (" <<
 245       SizeToStr(Cache.Head().VerFileCount*Cache.Head().VerFileSz) << ')' << endl;
 246    cout << "Total Provides Mappings: " << Cache.Head().ProvidesCount << " (" <<
 247       SizeToStr(Cache.Head().ProvidesCount*Cache.Head().ProvidesSz) << ')' << endl;
 248
 249    // String list stats
 250    unsigned long Size = 0;
 251    unsigned long Count = 0;
 252    for (pkgCache::StringItem *I = Cache.StringItemP + Cache.Head().StringList;
 253         I!= Cache.StringItemP; I = Cache.StringItemP + I->NextItem)
 254    {
 255       Count++;
 256       Size += strlen(Cache.StrP + I->String);
 257    }
 258    cout << "Total Globbed Strings: " << Count << " (" << SizeToStr(Size) << ')' << endl;
 259
 260    unsigned long Slack = 0;
 261    for (int I = 0; I != 7; I++)
 262       Slack += Cache.Head().Pools[I].ItemSize*Cache.Head().Pools[I].Count;
 263    cout << "Total Slack space: " << SizeToStr(Slack) << endl;
 264
 265    unsigned long Total = 0;
 266    Total = Slack + Size + Cache.Head().DependsCount*Cache.Head().DependencySz +
 267            Cache.Head().VersionCount*Cache.Head().VersionSz +
 268            Cache.Head().PackageCount*Cache.Head().PackageSz +
 269            Cache.Head().VerFileCount*Cache.Head().VerFileSz +
 270            Cache.Head().ProvidesCount*Cache.Head().ProvidesSz;
 271    cout << "Total Space Accounted for: " << SizeToStr(Total) << endl;
 272
 273    return true;
 274 }
 275                                                                         /*}}}*/
 276 // Check - Check some things about the cache                            /*{{{*/
 277 // ---------------------------------------------------------------------
 278 /* Debug aide mostly */
 279 bool Check(CommandLine &Cmd)
 280 {
 281    pkgCache &Cache = *GCache;
 282    pkgCache::PkgIterator Pkg = Cache.PkgBegin();
 283    for (;Pkg.end() != true; Pkg++)
 284    {
 285       if (Pkg.Section() == 0 && Pkg->VersionList != 0)
 286          cout << "Bad section " << Pkg.Name() << endl;
 287
 288       for (pkgCache::VerIterator Cur = Pkg.VersionList();
 289            Cur.end() != true; Cur++)
 290       {
 291          if (Cur->Priority < 1 || Cur->Priority > 5)
 292             cout << "Bad prio " << Pkg.Name() << ',' << Cur.VerStr() << " == " << (int)Cur->Priority << endl;
 293       }
 294    }
 295    return true;
 296 }
 297                                                                         /*}}}*/
 298 // Dump - show everything                                               /*{{{*/
 299 // ---------------------------------------------------------------------
 300 /* */
 301 bool Dump(CommandLine &Cmd)
 302 {
 303    pkgCache &Cache = *GCache;
 304    for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
 305    {
 306       cout << "Package: " << P.Name() << endl;
 307       for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; V++)
 308       {
 309          cout << " Version: " << V.VerStr() << endl;
 310          cout << "     File: " << V.FileList().File().FileName() << endl;
 311          for (pkgCache::DepIterator D = V.DependsList(); D.end() == false; D++)
 312             cout << "  Depends: " << D.TargetPkg().Name() << ' ' << D.TargetVer() << endl;
 313       }
 314    }
 315
 316    for (pkgCache::PkgFileIterator F(Cache); F.end() == false; F++)
 317    {
 318       cout << "File: " << F.FileName() << endl;
 319       cout << " Size: " << F->Size << endl;
 320       cout << " ID: " << F->ID << endl;
 321       cout << " Flags: " << F->Flags << endl;
 322       cout << " Time: " << TimeRFC1123(F->mtime) << endl;
 323       cout << " Archive: " << F.Archive() << endl;
 324       cout << " Component: " << F.Component() << endl;
 325       cout << " Version: " << F.Version() << endl;
 326       cout << " Origin: " << F.Origin() << endl;
 327       cout << " Label: " << F.Label() << endl;
 328       cout << " Architecture: " << F.Architecture() << endl;
 329    }
 330
 331    return true;
 332 }
 333                                                                         /*}}}*/
 334 // GetCandidateVer - Returns the Candidate install version              /*{{{*/
 335 // ---------------------------------------------------------------------
 336 /* This should really use the DepCache or something.. Copied from there.
 337    Allow current is required to filter out the status file when emitting
 338    an available file. */
 339 static pkgCache::VerIterator GetCandidateVer(pkgCache::PkgIterator Pkg,
 340                                              bool AllowCurrent = true)
 341 {
 342    /* Not source/not automatic versions cannot be a candidate version
 343     unless they are already installed */
 344    for (pkgCache::VerIterator I = Pkg.VersionList(); I.end() == false; I++)
 345    {
 346       if (Pkg.CurrentVer() == I && AllowCurrent == true)
 347          return I;
 348
 349       for (pkgCache::VerFileIterator J = I.FileList(); J.end() == false; J++)
 350          if ((J.File()->Flags & pkgCache::Flag::NotSource) == 0 &&
 351              (J.File()->Flags & pkgCache::Flag::NotAutomatic) == 0)
 352             return I;
 353    }
 354
 355    return pkgCache::VerIterator(*GCache,0);
 356 }
 357                                                                         /*}}}*/
 358 // DumpAvail - Print out the available list                             /*{{{*/
 359 // ---------------------------------------------------------------------
 360 /* This is needed to make dpkg --merge happy */
 361 bool DumpAvail(CommandLine &Cmd)
 362 {
 363    pkgCache &Cache = *GCache;
 364    unsigned char *Buffer = new unsigned char[Cache.HeaderP->MaxVerFileSize];
 365
 366    for (pkgCache::PkgFileIterator I = Cache.FileBegin(); I.end() == false; I++)
 367    {
 368       if ((I->Flags & pkgCache::Flag::NotSource) != 0)
 369          continue;
 370
 371       if (I.IsOk() == false)
 372       {
 373          delete [] Buffer;
 374          return _error->Error("Package file %s is out of sync.",I.FileName());
 375       }
 376
 377       FileFd PkgF(I.FileName(),FileFd::ReadOnly);
 378       if (_error->PendingError() == true)
 379       {
 380          delete [] Buffer;
 381          return false;
 382       }
 383
 384       /* Write all of the records from this package file, we search the entire
 385          structure to find them */
 386       for (pkgCache::PkgIterator P = Cache.PkgBegin(); P.end() == false; P++)
 387       {
 388          // Find the proper version to use. We should probably use the DepCache.
 389          pkgCache::VerIterator V = GetCandidateVer(P,false);
 390
 391          if (V.end() == true || V.FileList().File() != I)
 392             continue;
 393
 394          // Read the record and then write it out again.
 395          if (PkgF.Seek(V.FileList()->Offset) == false ||
 396              PkgF.Read(Buffer,V.FileList()->Size) == false ||
 397              write(STDOUT_FILENO,Buffer,V.FileList()->Size) != V.FileList()->Size)
 398          {
 399             delete [] Buffer;
 400             return false;
 401          }
 402       }
 403    }
 404
 405    return true;
 406 }
 407                                                                         /*}}}*/
 408 // DoAdd - Perform an adding operation                                  /*{{{*/
 409 // ---------------------------------------------------------------------
 410 /* */
 411 bool DoAdd(CommandLine &CmdL)
 412 {
 413    // Make sure there is at least one argument
 414    if (CmdL.FileSize() <= 1)
 415       return _error->Error("You must give at least one file name");
 416
 417    // Open the cache
 418    FileFd CacheF(_config->FindFile("Dir::Cache::pkgcache"),FileFd::WriteAny);
 419    if (_error->PendingError() == true)
 420       return false;
 421
 422    DynamicMMap Map(CacheF,MMap::Public);
 423    if (_error->PendingError() == true)
 424       return false;
 425
 426    OpTextProgress Progress(*_config);
 427    pkgCacheGenerator Gen(Map,Progress);
 428    if (_error->PendingError() == true)
 429       return false;
 430
 431    unsigned long Length = CmdL.FileSize() - 1;
 432    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 433    {
 434       Progress.OverallProgress(I - CmdL.FileList,Length,1,"Generating cache");
 435       Progress.SubProgress(Length);
 436
 437       // Do the merge
 438       FileFd TagF(*I,FileFd::ReadOnly);
 439       debListParser Parser(TagF);
 440       if (_error->PendingError() == true)
 441          return _error->Error("Problem opening %s",*I);
 442
 443       if (Gen.SelectFile(*I) == false)
 444          return _error->Error("Problem with SelectFile");
 445
 446       if (Gen.MergeList(Parser) == false)
 447          return _error->Error("Problem with MergeList");
 448    }
 449
 450    Progress.Done();
 451    GCache = &Gen.GetCache();
 452    Stats(CmdL);
 453
 454    return true;
 455 }
 456                                                                         /*}}}*/
 457 // DisplayRecord - Displays the complete record for the package         /*{{{*/
 458 // ---------------------------------------------------------------------
 459 /* This displays the package record from the proper package index file.
 460    It is not used by DumpAvail for performance reasons. */
 461 bool DisplayRecord(pkgCache::VerIterator V)
 462 {
 463    // Find an appropriate file
 464    pkgCache::VerFileIterator Vf = V.FileList();
 465    for (; Vf.end() == false; Vf++)
 466       if ((Vf.File()->Flags & pkgCache::Flag::NotSource) == 0)
 467          break;
 468    if (Vf.end() == true)
 469       Vf = V.FileList();
 470
 471    // Check and load the package list file
 472    pkgCache::PkgFileIterator I = Vf.File();
 473    if (I.IsOk() == false)
 474       return _error->Error("Package file %s is out of sync.",I.FileName());
 475
 476    FileFd PkgF(I.FileName(),FileFd::ReadOnly);
 477    if (_error->PendingError() == true)
 478       return false;
 479
 480    // Read the record and then write it out again.
 481    unsigned char *Buffer = new unsigned char[GCache->HeaderP->MaxVerFileSize];
 482    if (PkgF.Seek(V.FileList()->Offset) == false ||
 483        PkgF.Read(Buffer,V.FileList()->Size) == false ||
 484        write(STDOUT_FILENO,Buffer,V.FileList()->Size) != V.FileList()->Size)
 485    {
 486       delete [] Buffer;
 487       return false;
 488    }
 489
 490    delete [] Buffer;
 491
 492    return true;
 493 }
 494                                                                         /*}}}*/
 495 // Search - Perform a search                                            /*{{{*/
 496 // ---------------------------------------------------------------------
 497 /* This searches the package names and pacakge descriptions for a pattern */
 498 bool Search(CommandLine &CmdL)
 499 {
 500    pkgCache &Cache = *GCache;
 501    bool ShowFull = _config->FindB("APT::Cache::ShowFull",false);
 502    bool NamesOnly = _config->FindB("APT::Cache::NamesOnly",false);
 503
 504    // Make sure there is at least one argument
 505    if (CmdL.FileSize() != 2)
 506       return _error->Error("You must give exactly one pattern");
 507
 508    // Compile the regex pattern
 509    regex_t Pattern;
 510    if (regcomp(&Pattern,CmdL.FileList[1],REG_EXTENDED | REG_ICASE |
 511                REG_NOSUB) != 0)
 512       return _error->Error("Regex compilation error");
 513
 514    // Create the text record parser
 515    pkgRecords Recs(Cache);
 516    if (_error->PendingError() == true)
 517       return false;
 518
 519    // Search package names
 520    pkgCache::PkgIterator I = Cache.PkgBegin();
 521    for (;I.end() != true; I++)
 522    {
 523       // We search against the install version as that makes the most sense..
 524       pkgCache::VerIterator V = GetCandidateVer(I);
 525       if (V.end() == true)
 526          continue;
 527
 528       pkgRecords::Parser &P = Recs.Lookup(V.FileList());
 529
 530       if (regexec(&Pattern,I.Name(),0,0,0) == 0 ||
 531           (NamesOnly == false &&
 532            regexec(&Pattern,P.LongDesc().c_str(),0,0,0) == 0))
 533       {
 534          if (ShowFull == true)
 535             DisplayRecord(V);
 536          else
 537             cout << I.Name() << " - " << P.ShortDesc() << endl;
 538       }
 539    }
 540
 541    regfree(&Pattern);
 542    return true;
 543 }
 544                                                                         /*}}}*/
 545 // ShowPackage - Dump the package record to the screen                  /*{{{*/
 546 // ---------------------------------------------------------------------
 547 /* */
 548 bool ShowPackage(CommandLine &CmdL)
 549 {
 550    pkgCache &Cache = *GCache;
 551    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 552    {
 553       pkgCache::PkgIterator Pkg = Cache.FindPkg(*I);
 554       if (Pkg.end() == true)
 555       {
 556          _error->Warning("Unable to locate package %s",*I);
 557          continue;
 558       }
 559
 560       // Find the proper version to use. We should probably use the DepCache.
 561       pkgCache::VerIterator V = GetCandidateVer(Pkg);
 562       if (V.end() == true || V.FileList().end() == true)
 563          continue;
 564       if (DisplayRecord(V) == false)
 565          return false;
 566    }
 567    return true;
 568 }
 569                                                                         /*}}}*/
 570 // GenCaches - Call the main cache generator                            /*{{{*/
 571 // ---------------------------------------------------------------------
 572 /* */
 573 bool GenCaches(CommandLine &Cmd)
 574 {
 575    OpTextProgress Progress(*_config);
 576
 577    pkgSourceList List;
 578    List.ReadMainList();
 579    return pkgMakeStatusCache(List,Progress);
 580 }
 581                                                                         /*}}}*/
 582 // ShowHelp - Show a help screen                                        /*{{{*/
 583 // ---------------------------------------------------------------------
 584 /* */
 585 bool ShowHelp(CommandLine &Cmd)
 586 {
 587    cout << PACKAGE << ' ' << VERSION << " for " << ARCHITECTURE <<
 588        " compiled on " << __DATE__ << "  " << __TIME__ << endl;
 589    if (_config->FindB("version") == true)
 590       return 100;
 591
 592    cout << "Usage: apt-cache [options] command" << endl;
 593    cout << "       apt-cache [options] add file1 [file1 ...]" << endl;
 594    cout << "       apt-cache [options] showpkg pkg1 [pkg2 ...]" << endl;
 595    cout << endl;
 596    cout << "apt-cache is a low-level tool used to manipulate APT's binary" << endl;
 597    cout << "cache files stored in " << _config->FindFile("Dir::Cache") << endl;
 598    cout << "It is not ment for ordinary use only as a debug aide." << endl;
 599    cout << endl;
 600    cout << "Commands:" << endl;
 601    cout << "   add - Add an package file to the source cache" << endl;
 602    cout << "   gencaches - Build both the package and source cache" << endl;
 603    cout << "   showpkg - Show some general information for a single package" << endl;
 604    cout << "   stats - Show some basic statistics" << endl;
 605    cout << "   dump - Show the entire file in a terse form" << endl;
 606    cout << "   dumpavail - Print an available file to stdout" << endl;
 607    cout << "   unmet - Show unmet dependencies" << endl;
 608    cout << "   check - Check the cache a bit" << endl;
 609    cout << "   search - Search the package list for a regex pattern" << endl;
 610    cout << "   show - Show a readable record for the package" << endl;
 611    cout << endl;
 612    cout << "Options:" << endl;
 613    cout << "  -h   This help text." << endl;
 614    cout << "  -p=? The package cache. [" << _config->FindFile("Dir::Cache::pkgcache") << ']' << endl;
 615    cout << "  -s=? The source cache. [" << _config->FindFile("Dir::Cache::srcpkgcache") << ']' << endl;
 616    cout << "  -q   Disable progress indicator." << endl;
 617    cout << "  -i   Show only important deps for the unmet command." << endl;
 618    cout << "  -c=? Read this configuration file" << endl;
 619    cout << "  -o=? Set an arbitary configuration option, eg -o dir::cache=/tmp" << endl;
 620    cout << "See the apt-cache(8) and apt.conf(5) manual pages for more information." << endl;
 621    return 100;
 622 }
 623                                                                         /*}}}*/
 624 // CacheInitialize - Initialize things for apt-cache                    /*{{{*/
 625 // ---------------------------------------------------------------------
 626 /* */
 627 void CacheInitialize()
 628 {
 629    _config->Set("quiet",0);
 630    _config->Set("help",false);
 631 }
 632                                                                         /*}}}*/
 633
 634 int main(int argc,const char *argv[])
 635 {
 636    CommandLine::Args Args[] = {
 637       {'h',"help","help",0},
 638       {'v',"version","version",0},
 639       {'p',"pkg-cache","Dir::Cache::pkgcache",CommandLine::HasArg},
 640       {'s',"src-cache","Dir::Cache::srcpkgcache",CommandLine::HasArg},
 641       {'q',"quiet","quiet",CommandLine::IntLevel},
 642       {'i',"important","APT::Cache::Important",0},
 643       {'f',"full","APT::Cache::ShowFull",0},
 644       {0,"names-only","APT::Cache::NamesOnly",0},
 645       {'c',"config-file",0,CommandLine::ConfigFile},
 646       {'o',"option",0,CommandLine::ArbItem},
 647       {0,0,0,0}};
 648    CommandLine::Dispatch CmdsA[] = {{"help",&ShowHelp},
 649                                     {"add",&DoAdd},
 650                                     {"gencaches",&GenCaches},
 651                                     {0,0}};
 652    CommandLine::Dispatch CmdsB[] = {{"showpkg",&DumpPackage},
 653                                     {"stats",&Stats},
 654                                     {"dump",&Dump},
 655                                     {"dumpavail",&DumpAvail},
 656                                     {"unmet",&UnMet},
 657                                     {"check",&Check},
 658                                     {"search",&Search},
 659                                     {"show",&ShowPackage},
 660                                     {0,0}};
 661
 662    CacheInitialize();
 663
 664    // Parse the command line and initialize the package library
 665    CommandLine CmdL(Args,_config);
 666    if (pkgInitialize(*_config) == false ||
 667        CmdL.Parse(argc,argv) == false)
 668    {
 669       _error->DumpErrors();
 670       return 100;
 671    }
 672
 673    // See if the help should be shown
 674    if (_config->FindB("help") == true ||
 675        CmdL.FileSize() == 0)
 676       return ShowHelp(CmdL);
 677
 678    // Deal with stdout not being a tty
 679    if (ttyname(STDOUT_FILENO) == 0 && _config->FindI("quiet",0) < 1)
 680       _config->Set("quiet","1");
 681
 682    if (CmdL.DispatchArg(CmdsA,false) == false && _error->PendingError() == false)
 683    {
 684       // Open the cache file
 685       FileFd CacheF(_config->FindFile("Dir::Cache::pkgcache"),FileFd::ReadOnly);
 686       MMap Map(CacheF,MMap::Public | MMap::ReadOnly);
 687       if (_error->PendingError() == false)
 688       {
 689          pkgCache Cache(Map);
 690          GCache = &Cache;
 691          if (_error->PendingError() == false)
 692             CmdL.DispatchArg(CmdsB);
 693       }
 694    }
 695
 696    // Print any errors or warnings found during parsing
 697    if (_error->empty() == false)
 698    {
 699       bool Errors = _error->PendingError();
 700       _error->DumpErrors();
 701       return Errors == true?100:0;
 702    }
 703
 704    return 0;
 705 }