cmdline/apt-get.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-get.cc,v 1.156 2004/08/28 01:05:16 mdz Exp $
   4 /* ######################################################################
   5
   6    apt-get - Cover for dpkg
   7
   8    This is an allout cover for dpkg implementing a safer front end. It is
   9    based largely on libapt-pkg.
  10
  11    The syntax is different,
  12       apt-get [opt] command [things]
  13    Where command is:
  14       update - Resyncronize the package files from their sources
  15       upgrade - Smart-Download the newest versions of all packages
  16       dselect-upgrade - Follows dselect's changes to the Status: field
  17                        and installes new and removes old packages
  18       dist-upgrade - Powerful upgrader designed to handle the issues with
  19                     a new distribution.
  20       install - Download and install a given package (by name, not by .deb)
  21       check - Update the package cache and check for broken packages
  22       clean - Erase the .debs downloaded to /var/cache/apt/archives and
  23               the partial dir too
  24
  25    ##################################################################### */
  26                                                                         /*}}}*/
  27 // Include Files                                                        /*{{{*/
  28 #include <config.h>
  29
  30 #include <apt-pkg/acquire-item.h>
  31 #include <apt-pkg/algorithms.h>
  32 #include <apt-pkg/aptconfiguration.h>
  33 #include <apt-pkg/cachefile.h>
  34 #include <apt-pkg/cacheset.h>
  35 #include <apt-pkg/clean.h>
  36 #include <apt-pkg/cmndline.h>
  37 #include <apt-pkg/debmetaindex.h>
  38 #include <apt-pkg/depcache.h>
  39 #include <apt-pkg/error.h>
  40 #include <apt-pkg/fileutl.h>
  41 #include <apt-pkg/indexfile.h>
  42 #include <apt-pkg/indexrecords.h>
  43 #include <apt-pkg/init.h>
  44 #include <apt-pkg/md5.h>
  45 #include <apt-pkg/metaindex.h>
  46 #include <apt-pkg/pkgrecords.h>
  47 #include <apt-pkg/pkgsystem.h>
  48 #include <apt-pkg/progress.h>
  49 #include <apt-pkg/sourcelist.h>
  50 #include <apt-pkg/srcrecords.h>
  51 #include <apt-pkg/strutl.h>
  52 #include <apt-pkg/version.h>
  53 #include <apt-pkg/acquire.h>
  54 #include <apt-pkg/configuration.h>
  55 #include <apt-pkg/macros.h>
  56 #include <apt-pkg/pkgcache.h>
  57 #include <apt-pkg/cacheiterators.h>
  58 #include <apt-pkg/upgrade.h>
  59
  60 #include <apt-private/acqprogress.h>
  61 #include <apt-private/private-cacheset.h>
  62 #include <apt-private/private-cachefile.h>
  63 #include <apt-private/private-cmndline.h>
  64 #include <apt-private/private-download.h>
  65 #include <apt-private/private-install.h>
  66 #include <apt-private/private-main.h>
  67 #include <apt-private/private-moo.h>
  68 #include <apt-private/private-output.h>
  69 #include <apt-private/private-update.h>
  70 #include <apt-private/private-upgrade.h>
  71 #include <apt-private/private-utils.h>
  72
  73 #include <errno.h>
  74 #include <signal.h>
  75 #include <stddef.h>
  76 #include <stdio.h>
  77 #include <stdlib.h>
  78 #include <string.h>
  79 #include <sys/ioctl.h>
  80 #include <sys/stat.h>
  81 #include <sys/statfs.h>
  82 #include <sys/statvfs.h>
  83 #include <sys/wait.h>
  84 #include <unistd.h>
  85 #include <algorithm>
  86 #include <fstream>
  87 #include <iostream>
  88 #include <set>
  89 #include <string>
  90 #include <vector>
  91
  92 #include <apti18n.h>
  93                                                                         /*}}}*/
  94
  95 using namespace std;
  96
  97 // TryToInstallBuildDep - Try to install a single package               /*{{{*/
  98 // ---------------------------------------------------------------------
  99 /* This used to be inlined in DoInstall, but with the advent of regex package
 100    name matching it was split out.. */
 101 static bool TryToInstallBuildDep(pkgCache::PkgIterator Pkg,pkgCacheFile &Cache,
 102                   pkgProblemResolver &Fix,bool Remove,bool BrokenFix,
 103                   bool AllowFail = true)
 104 {
 105    if (Cache[Pkg].CandidateVer == 0 && Pkg->ProvidesList != 0)
 106    {
 107       CacheSetHelperAPTGet helper(c1out);
 108       helper.showErrors(false);
 109       pkgCache::VerIterator Ver = helper.canNotFindNewestVer(Cache, Pkg);
 110       if (Ver.end() == false)
 111          Pkg = Ver.ParentPkg();
 112       else if (helper.showVirtualPackageErrors(Cache) == false)
 113          return AllowFail;
 114    }
 115
 116    if (_config->FindB("Debug::BuildDeps",false) == true)
 117    {
 118       if (Remove == true)
 119          cout << "  Trying to remove " << Pkg << endl;
 120       else
 121          cout << "  Trying to install " << Pkg << endl;
 122    }
 123
 124    if (Remove == true)
 125    {
 126       TryToRemove RemoveAction(Cache, &Fix);
 127       RemoveAction(Pkg.VersionList());
 128    } else if (Cache[Pkg].CandidateVer != 0) {
 129       TryToInstall InstallAction(Cache, &Fix, BrokenFix);
 130       InstallAction(Cache[Pkg].CandidateVerIter(Cache));
 131       InstallAction.doAutoInstall();
 132    } else
 133       return AllowFail;
 134
 135    return true;
 136 }
 137                                                                         /*}}}*/
 138
 139
 140 // helper that can go wit hthe next ABI break
 141 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
 142 static std::string MetaIndexFileNameOnDisk(metaIndex *metaindex)
 143 {
 144    // FIXME: this cast is the horror, the horror
 145    debReleaseIndex *r = (debReleaseIndex*)metaindex;
 146
 147    // see if we have a InRelease file
 148    std::string PathInRelease =  r->MetaIndexFile("InRelease");
 149    if (FileExists(PathInRelease))
 150       return PathInRelease;
 151
 152    // and if not return the normal one
 153    if (FileExists(PathInRelease))
 154       return r->MetaIndexFile("Release");
 155
 156    return "";
 157 }
 158 #endif
 159
 160 // GetReleaseForSourceRecord - Return Suite for the given srcrecord     /*{{{*/
 161 // ---------------------------------------------------------------------
 162 /* */
 163 static std::string GetReleaseForSourceRecord(pkgSourceList *SrcList,
 164                                       pkgSrcRecords::Parser *Parse)
 165 {
 166    // try to find release
 167    const pkgIndexFile& CurrentIndexFile = Parse->Index();
 168
 169    for (pkgSourceList::const_iterator S = SrcList->begin();
 170         S != SrcList->end(); ++S)
 171    {
 172       vector<pkgIndexFile *> *Indexes = (*S)->GetIndexFiles();
 173       for (vector<pkgIndexFile *>::const_iterator IF = Indexes->begin();
 174            IF != Indexes->end(); ++IF)
 175       {
 176          if (&CurrentIndexFile == (*IF))
 177          {
 178 #if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
 179             std::string path = MetaIndexFileNameOnDisk(*S);
 180 #else
 181             std::string path = (*S)->LocalFileName();
 182 #endif
 183             if (path != "")
 184             {
 185                indexRecords records;
 186                records.Load(path);
 187                return records.GetSuite();
 188             }
 189          }
 190       }
 191    }
 192    return "";
 193 }
 194                                                                         /*}}}*/
 195 // FindSrc - Find a source record                                       /*{{{*/
 196 // ---------------------------------------------------------------------
 197 /* */
 198 static pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
 199                                pkgSrcRecords &SrcRecs,string &Src,
 200                                CacheFile &CacheFile)
 201 {
 202    string VerTag, UserRequestedVerTag;
 203    string ArchTag = "";
 204    string RelTag = _config->Find("APT::Default-Release");
 205    string TmpSrc = Name;
 206    pkgDepCache *Cache = CacheFile.GetDepCache();
 207
 208    // extract release
 209    size_t found = TmpSrc.find_last_of("/");
 210    if (found != string::npos)
 211    {
 212       RelTag = TmpSrc.substr(found+1);
 213       TmpSrc = TmpSrc.substr(0,found);
 214    }
 215    // extract the version
 216    found = TmpSrc.find_last_of("=");
 217    if (found != string::npos)
 218    {
 219       VerTag = UserRequestedVerTag = TmpSrc.substr(found+1);
 220       TmpSrc = TmpSrc.substr(0,found);
 221    }
 222    // extract arch
 223    found = TmpSrc.find_last_of(":");
 224    if (found != string::npos)
 225    {
 226       ArchTag = TmpSrc.substr(found+1);
 227       TmpSrc = TmpSrc.substr(0,found);
 228    }
 229
 230    /* Lookup the version of the package we would install if we were to
 231       install a version and determine the source package name, then look
 232       in the archive for a source package of the same name. */
 233    bool MatchSrcOnly = _config->FindB("APT::Get::Only-Source");
 234    pkgCache::PkgIterator Pkg;
 235    if (ArchTag != "")
 236       Pkg = Cache->FindPkg(TmpSrc, ArchTag);
 237    else
 238       Pkg = Cache->FindPkg(TmpSrc);
 239
 240    // if we can't find a package but the user qualified with a arch,
 241    // error out here
 242    if (Pkg.end() && ArchTag != "")
 243    {
 244       Src = Name;
 245       _error->Error(_("Can not find a package for architecture '%s'"),
 246                     ArchTag.c_str());
 247       return 0;
 248    }
 249
 250    if (MatchSrcOnly == false && Pkg.end() == false)
 251    {
 252       if(VerTag != "" || RelTag != "" || ArchTag != "")
 253       {
 254          bool fuzzy = false;
 255          // we have a default release, try to locate the pkg. we do it like
 256          // this because GetCandidateVer() will not "downgrade", that means
 257          // "apt-get source -t stable apt" won't work on a unstable system
 258          for (pkgCache::VerIterator Ver = Pkg.VersionList();; ++Ver)
 259          {
 260             // try first only exact matches, later fuzzy matches
 261             if (Ver.end() == true)
 262             {
 263                if (fuzzy == true)
 264                   break;
 265                fuzzy = true;
 266                Ver = Pkg.VersionList();
 267                // exit right away from the Pkg.VersionList() loop if we
 268                // don't have any versions
 269                if (Ver.end() == true)
 270                   break;
 271             }
 272
 273             // ignore arches that are not for us
 274             if (ArchTag != "" && Ver.Arch() != ArchTag)
 275                continue;
 276
 277             // pick highest version for the arch unless the user wants
 278             // something else
 279             if (ArchTag != "" && VerTag == "" && RelTag == "")
 280                if(Cache->VS().CmpVersion(VerTag, Ver.VerStr()) < 0)
 281                   VerTag = Ver.VerStr();
 282
 283             // We match against a concrete version (or a part of this version)
 284             if (VerTag.empty() == false &&
 285                 (fuzzy == true || Cache->VS().CmpVersion(VerTag, Ver.VerStr()) != 0) && // exact match
 286                 (fuzzy == false || strncmp(VerTag.c_str(), Ver.VerStr(), VerTag.size()) != 0)) // fuzzy match
 287                continue;
 288
 289             for (pkgCache::VerFileIterator VF = Ver.FileList();
 290                  VF.end() == false; ++VF)
 291             {
 292                /* If this is the status file, and the current version is not the
 293                   version in the status file (ie it is not installed, or somesuch)
 294                   then it is not a candidate for installation, ever. This weeds
 295                   out bogus entries that may be due to config-file states, or
 296                   other. */
 297                if ((VF.File()->Flags & pkgCache::Flag::NotSource) ==
 298                    pkgCache::Flag::NotSource && Pkg.CurrentVer() != Ver)
 299                   continue;
 300
 301                // or we match against a release
 302                if(VerTag.empty() == false ||
 303                   (VF.File().Archive() != 0 && VF.File().Archive() == RelTag) ||
 304                   (VF.File().Codename() != 0 && VF.File().Codename() == RelTag))
 305                {
 306                   pkgRecords::Parser &Parse = Recs.Lookup(VF);
 307                   Src = Parse.SourcePkg();
 308                   // no SourcePkg name, so it is the "binary" name
 309                   if (Src.empty() == true)
 310                      Src = TmpSrc;
 311                   // the Version we have is possibly fuzzy or includes binUploads,
 312                   // so we use the Version of the SourcePkg (empty if same as package)
 313                   VerTag = Parse.SourceVer();
 314                   if (VerTag.empty() == true)
 315                      VerTag = Ver.VerStr();
 316                   break;
 317                }
 318             }
 319             if (Src.empty() == false)
 320                break;
 321          }
 322       }
 323
 324       if (Src == "" && ArchTag != "")
 325       {
 326          if (VerTag != "")
 327             _error->Error(_("Can not find a package '%s' with version '%s'"),
 328                           Pkg.FullName().c_str(), VerTag.c_str());
 329          if (RelTag != "")
 330             _error->Error(_("Can not find a package '%s' with release '%s'"),
 331                           Pkg.FullName().c_str(), RelTag.c_str());
 332          Src = Name;
 333          return 0;
 334       }
 335
 336
 337       if (Src.empty() == true)
 338       {
 339          // if we don't have found a fitting package yet so we will
 340          // choose a good candidate and proceed with that.
 341          // Maybe we will find a source later on with the right VerTag
 342          // or RelTag
 343          pkgCache::VerIterator Ver = Cache->GetCandidateVer(Pkg);
 344          if (Ver.end() == false)
 345          {
 346             pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
 347             Src = Parse.SourcePkg();
 348             if (VerTag.empty() == true)
 349                VerTag = Parse.SourceVer();
 350          }
 351       }
 352    }
 353
 354    if (Src.empty() == true)
 355    {
 356       Src = TmpSrc;
 357    }
 358    else
 359    {
 360       /* if we have a source pkg name, make sure to only search
 361          for srcpkg names, otherwise apt gets confused if there
 362          is a binary package "pkg1" and a source package "pkg1"
 363          with the same name but that comes from different packages */
 364       MatchSrcOnly = true;
 365       if (Src != TmpSrc)
 366       {
 367          ioprintf(c1out, _("Picking '%s' as source package instead of '%s'\n"), Src.c_str(), TmpSrc.c_str());
 368       }
 369    }
 370
 371    // The best hit
 372    pkgSrcRecords::Parser *Last = 0;
 373    unsigned long Offset = 0;
 374    string Version;
 375    pkgSourceList *SrcList = CacheFile.GetSourceList();
 376
 377    /* Iterate over all of the hits, which includes the resulting
 378       binary packages in the search */
 379    pkgSrcRecords::Parser *Parse;
 380    while (true)
 381    {
 382       SrcRecs.Restart();
 383       while ((Parse = SrcRecs.Find(Src.c_str(), MatchSrcOnly)) != 0)
 384       {
 385          const string Ver = Parse->Version();
 386
 387          // See if we need to look for a specific release tag
 388          if (RelTag != "" && UserRequestedVerTag == "")
 389          {
 390             const string Rel = GetReleaseForSourceRecord(SrcList, Parse);
 391
 392             if (Rel == RelTag)
 393             {
 394                Last = Parse;
 395                Offset = Parse->Offset();
 396                Version = Ver;
 397             }
 398          }
 399
 400          // Ignore all versions which doesn't fit
 401          if (VerTag.empty() == false &&
 402              Cache->VS().CmpVersion(VerTag, Ver) != 0) // exact match
 403             continue;
 404
 405          // Newer version or an exact match? Save the hit
 406          if (Last == 0 || Cache->VS().CmpVersion(Version,Ver) < 0) {
 407             Last = Parse;
 408             Offset = Parse->Offset();
 409             Version = Ver;
 410          }
 411
 412          // was the version check above an exact match?
 413          // If so, we don't need to look further
 414          if (VerTag.empty() == false && (VerTag == Ver))
 415             break;
 416       }
 417       if (UserRequestedVerTag == "" && Version != "" && RelTag != "")
 418          ioprintf(c1out, "Selected version '%s' (%s) for %s\n",
 419                   Version.c_str(), RelTag.c_str(), Src.c_str());
 420
 421       if (Last != 0 || VerTag.empty() == true)
 422          break;
 423       _error->Error(_("Can not find version '%s' of package '%s'"), VerTag.c_str(), TmpSrc.c_str());
 424       return 0;
 425    }
 426
 427    if (Last == 0 || Last->Jump(Offset) == false)
 428       return 0;
 429
 430    return Last;
 431 }
 432                                                                         /*}}}*/
 433 /* mark packages as automatically/manually installed.                   {{{*/
 434 static bool DoMarkAuto(CommandLine &CmdL)
 435 {
 436    bool Action = true;
 437    int AutoMarkChanged = 0;
 438    OpTextProgress progress;
 439    CacheFile Cache;
 440    if (Cache.Open() == false)
 441       return false;
 442
 443    if (strcasecmp(CmdL.FileList[0],"markauto") == 0)
 444       Action = true;
 445    else if (strcasecmp(CmdL.FileList[0],"unmarkauto") == 0)
 446       Action = false;
 447
 448    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 449    {
 450       const char *S = *I;
 451       // Locate the package
 452       pkgCache::PkgIterator Pkg = Cache->FindPkg(S);
 453       if (Pkg.end() == true) {
 454          return _error->Error(_("Couldn't find package %s"),S);
 455       }
 456       else
 457       {
 458          if (!Action)
 459             ioprintf(c1out,_("%s set to manually installed.\n"), Pkg.Name());
 460          else
 461             ioprintf(c1out,_("%s set to automatically installed.\n"),
 462                       Pkg.Name());
 463
 464          Cache->MarkAuto(Pkg,Action);
 465          AutoMarkChanged++;
 466       }
 467    }
 468
 469    _error->Notice(_("This command is deprecated. Please use 'apt-mark auto' and 'apt-mark manual' instead."));
 470
 471    if (AutoMarkChanged && ! _config->FindB("APT::Get::Simulate",false))
 472       return Cache->writeStateFile(NULL);
 473    return false;
 474 }
 475                                                                         /*}}}*/
 476 // DoDSelectUpgrade - Do an upgrade by following dselects selections    /*{{{*/
 477 // ---------------------------------------------------------------------
 478 /* Follows dselect's selections */
 479 static bool DoDSelectUpgrade(CommandLine &)
 480 {
 481    CacheFile Cache;
 482    if (Cache.OpenForInstall() == false || Cache.CheckDeps() == false)
 483       return false;
 484
 485    pkgDepCache::ActionGroup group(Cache);
 486
 487    // Install everything with the install flag set
 488    pkgCache::PkgIterator I = Cache->PkgBegin();
 489    for (;I.end() != true; ++I)
 490    {
 491       /* Install the package only if it is a new install, the autoupgrader
 492          will deal with the rest */
 493       if (I->SelectedState == pkgCache::State::Install)
 494          Cache->MarkInstall(I,false);
 495    }
 496
 497    /* Now install their deps too, if we do this above then order of
 498       the status file is significant for | groups */
 499    for (I = Cache->PkgBegin();I.end() != true; ++I)
 500    {
 501       /* Install the package only if it is a new install, the autoupgrader
 502          will deal with the rest */
 503       if (I->SelectedState == pkgCache::State::Install)
 504          Cache->MarkInstall(I,true);
 505    }
 506
 507    // Apply erasures now, they override everything else.
 508    for (I = Cache->PkgBegin();I.end() != true; ++I)
 509    {
 510       // Remove packages
 511       if (I->SelectedState == pkgCache::State::DeInstall ||
 512           I->SelectedState == pkgCache::State::Purge)
 513          Cache->MarkDelete(I,I->SelectedState == pkgCache::State::Purge);
 514    }
 515
 516    /* Resolve any problems that dselect created, allupgrade cannot handle
 517       such things. We do so quite aggressively too.. */
 518    if (Cache->BrokenCount() != 0)
 519    {
 520       pkgProblemResolver Fix(Cache);
 521
 522       // Hold back held packages.
 523       if (_config->FindB("APT::Ignore-Hold",false) == false)
 524       {
 525          for (pkgCache::PkgIterator I = Cache->PkgBegin(); I.end() == false; ++I)
 526          {
 527             if (I->SelectedState == pkgCache::State::Hold)
 528             {
 529                Fix.Protect(I);
 530                Cache->MarkKeep(I);
 531             }
 532          }
 533       }
 534
 535       if (Fix.Resolve() == false)
 536       {
 537          ShowBroken(c1out,Cache,false);
 538          return _error->Error(_("Internal error, problem resolver broke stuff"));
 539       }
 540    }
 541
 542    // Now upgrade everything
 543    if (pkgAllUpgrade(Cache) == false)
 544    {
 545       ShowBroken(c1out,Cache,false);
 546       return _error->Error(_("Internal error, problem resolver broke stuff"));
 547    }
 548
 549    return InstallPackages(Cache,false);
 550 }
 551                                                                         /*}}}*/
 552 // DoClean - Remove download archives                                   /*{{{*/
 553 // ---------------------------------------------------------------------
 554 /* */
 555 static bool DoClean(CommandLine &)
 556 {
 557    std::string const archivedir = _config->FindDir("Dir::Cache::archives");
 558    std::string const pkgcache = _config->FindFile("Dir::cache::pkgcache");
 559    std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
 560
 561    if (_config->FindB("APT::Get::Simulate") == true)
 562    {
 563       cout << "Del " << archivedir << "* " << archivedir << "partial/*"<< endl
 564            << "Del " << pkgcache << " " << srcpkgcache << endl;
 565       return true;
 566    }
 567
 568    // Lock the archive directory
 569    FileFd Lock;
 570    if (_config->FindB("Debug::NoLocking",false) == false)
 571    {
 572       int lock_fd = GetLock(archivedir + "lock");
 573       if (lock_fd < 0)
 574          return _error->Error(_("Unable to lock the download directory"));
 575       Lock.Fd(lock_fd);
 576    }
 577
 578    pkgAcquire Fetcher;
 579    Fetcher.Clean(archivedir);
 580    Fetcher.Clean(archivedir + "partial/");
 581
 582    pkgCacheFile::RemoveCaches();
 583
 584    return true;
 585 }
 586                                                                         /*}}}*/
 587 // DoAutoClean - Smartly remove downloaded archives                     /*{{{*/
 588 // ---------------------------------------------------------------------
 589 /* This is similar to clean but it only purges things that cannot be
 590    downloaded, that is old versions of cached packages. */
 591 class LogCleaner : public pkgArchiveCleaner
 592 {
 593    protected:
 594    virtual void Erase(const char *File,string Pkg,string Ver,struct stat &St)
 595    {
 596       c1out << "Del " << Pkg << " " << Ver << " [" << SizeToStr(St.st_size) << "B]" << endl;
 597
 598       if (_config->FindB("APT::Get::Simulate") == false)
 599          unlink(File);
 600    };
 601 };
 602
 603 static bool DoAutoClean(CommandLine &)
 604 {
 605    // Lock the archive directory
 606    FileFd Lock;
 607    if (_config->FindB("Debug::NoLocking",false) == false)
 608    {
 609       int lock_fd = GetLock(_config->FindDir("Dir::Cache::Archives") + "lock");
 610       if (lock_fd < 0)
 611          return _error->Error(_("Unable to lock the download directory"));
 612       Lock.Fd(lock_fd);
 613    }
 614
 615    CacheFile Cache;
 616    if (Cache.Open() == false)
 617       return false;
 618
 619    LogCleaner Cleaner;
 620
 621    return Cleaner.Go(_config->FindDir("Dir::Cache::archives"),*Cache) &&
 622       Cleaner.Go(_config->FindDir("Dir::Cache::archives") + "partial/",*Cache);
 623 }
 624                                                                         /*}}}*/
 625 // DoDownload - download a binary                                       /*{{{*/
 626 // ---------------------------------------------------------------------
 627 static bool DoDownload(CommandLine &CmdL)
 628 {
 629    CacheFile Cache;
 630    if (Cache.ReadOnlyOpen() == false)
 631       return false;
 632
 633    APT::CacheSetHelper helper(c0out);
 634    APT::VersionSet verset = APT::VersionSet::FromCommandLine(Cache,
 635                 CmdL.FileList + 1, APT::VersionSet::CANDIDATE, helper);
 636
 637    if (verset.empty() == true)
 638       return false;
 639
 640    AcqTextStatus Stat(ScreenWidth, _config->FindI("quiet", 0));
 641    pkgAcquire Fetcher;
 642    if (Fetcher.Setup(&Stat) == false)
 643       return false;
 644
 645    pkgRecords Recs(Cache);
 646    pkgSourceList *SrcList = Cache.GetSourceList();
 647
 648    // reuse the usual acquire methods for deb files, but don't drop them into
 649    // the usual directories - keep everything in the current directory
 650    std::vector<std::string> storefile(verset.size());
 651    std::string const cwd = SafeGetCWD();
 652    _config->Set("Dir::Cache::Archives", cwd);
 653    int i = 0;
 654    for (APT::VersionSet::const_iterator Ver = verset.begin();
 655          Ver != verset.end(); ++Ver, ++i)
 656    {
 657       pkgAcquire::Item *I = new pkgAcqArchive(&Fetcher, SrcList, &Recs, *Ver, storefile[i]);
 658       std::string const filename = cwd + flNotDir(storefile[i]);
 659       storefile[i].assign(filename);
 660       I->DestFile.assign(filename);
 661    }
 662
 663    // Just print out the uris and exit if the --print-uris flag was used
 664    if (_config->FindB("APT::Get::Print-URIs") == true)
 665    {
 666       pkgAcquire::UriIterator I = Fetcher.UriBegin();
 667       for (; I != Fetcher.UriEnd(); ++I)
 668          cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
 669                I->Owner->FileSize << ' ' << I->Owner->HashSum() << endl;
 670       return true;
 671    }
 672
 673    if (_error->PendingError() == true || CheckAuth(Fetcher, false) == false)
 674       return false;
 675
 676    bool Failed = false;
 677    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false)
 678       return false;
 679
 680    // copy files in local sources to the current directory
 681    for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); I != Fetcher.ItemsEnd(); ++I)
 682    {
 683       std::string const filename = cwd + flNotDir((*I)->DestFile);
 684       if ((*I)->Local == true &&
 685           filename != (*I)->DestFile &&
 686           (*I)->Status == pkgAcquire::Item::StatDone)
 687       {
 688          std::ifstream src((*I)->DestFile.c_str(), std::ios::binary);
 689          std::ofstream dst(filename.c_str(), std::ios::binary);
 690          dst << src.rdbuf();
 691       }
 692    }
 693    return Failed == false;
 694 }
 695                                                                         /*}}}*/
 696 // DoCheck - Perform the check operation                                /*{{{*/
 697 // ---------------------------------------------------------------------
 698 /* Opening automatically checks the system, this command is mostly used
 699    for debugging */
 700 static bool DoCheck(CommandLine &)
 701 {
 702    CacheFile Cache;
 703    Cache.Open();
 704    Cache.CheckDeps();
 705
 706    return true;
 707 }
 708                                                                         /*}}}*/
 709 // DoSource - Fetch a source archive                                    /*{{{*/
 710 // ---------------------------------------------------------------------
 711 /* Fetch souce packages */
 712 struct DscFile
 713 {
 714    string Package;
 715    string Version;
 716    string Dsc;
 717 };
 718
 719 static bool DoSource(CommandLine &CmdL)
 720 {
 721    CacheFile Cache;
 722    if (Cache.Open(false) == false)
 723       return false;
 724
 725    if (CmdL.FileSize() <= 1)
 726       return _error->Error(_("Must specify at least one package to fetch source for"));
 727
 728    // Read the source list
 729    if (Cache.BuildSourceList() == false)
 730       return false;
 731    pkgSourceList *List = Cache.GetSourceList();
 732
 733    // Create the text record parsers
 734    pkgRecords Recs(Cache);
 735    pkgSrcRecords SrcRecs(*List);
 736    if (_error->PendingError() == true)
 737       return false;
 738
 739    // Create the download object
 740    AcqTextStatus Stat(ScreenWidth,_config->FindI("quiet",0));
 741    pkgAcquire Fetcher;
 742    Fetcher.SetLog(&Stat);
 743
 744    SPtrArray<DscFile> Dsc = new DscFile[CmdL.FileSize()];
 745
 746    // insert all downloaded uris into this set to avoid downloading them
 747    // twice
 748    set<string> queued;
 749
 750    // Diff only mode only fetches .diff files
 751    bool const diffOnly = _config->FindB("APT::Get::Diff-Only", false);
 752    // Tar only mode only fetches .tar files
 753    bool const tarOnly = _config->FindB("APT::Get::Tar-Only", false);
 754    // Dsc only mode only fetches .dsc files
 755    bool const dscOnly = _config->FindB("APT::Get::Dsc-Only", false);
 756
 757    // Load the requestd sources into the fetcher
 758    unsigned J = 0;
 759    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
 760    {
 761       string Src;
 762       pkgSrcRecords::Parser *Last = FindSrc(*I,Recs,SrcRecs,Src,Cache);
 763
 764       if (Last == 0) {
 765          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
 766       }
 767
 768       string srec = Last->AsStr();
 769       string::size_type pos = srec.find("\nVcs-");
 770       while (pos != string::npos)
 771       {
 772          pos += strlen("\nVcs-");
 773          string vcs = srec.substr(pos,srec.find(":",pos)-pos);
 774          if(vcs == "Browser")
 775          {
 776             pos = srec.find("\nVcs-", pos);
 777             continue;
 778          }
 779          pos += vcs.length()+2;
 780          string::size_type epos = srec.find("\n", pos);
 781          string uri = srec.substr(pos,epos-pos).c_str();
 782          ioprintf(c1out, _("NOTICE: '%s' packaging is maintained in "
 783                            "the '%s' version control system at:\n"
 784                            "%s\n"),
 785                   Src.c_str(), vcs.c_str(), uri.c_str());
 786          if(vcs == "Bzr")
 787             ioprintf(c1out,_("Please use:\n"
 788                              "bzr branch %s\n"
 789                              "to retrieve the latest (possibly unreleased) "
 790                              "updates to the package.\n"),
 791                      uri.c_str());
 792          break;
 793       }
 794
 795       // Back track
 796       vector<pkgSrcRecords::File> Lst;
 797       if (Last->Files(Lst) == false) {
 798          return false;
 799       }
 800
 801       // Load them into the fetcher
 802       for (vector<pkgSrcRecords::File>::const_iterator I = Lst.begin();
 803            I != Lst.end(); ++I)
 804       {
 805          // Try to guess what sort of file it is we are getting.
 806          if (I->Type == "dsc")
 807          {
 808             Dsc[J].Package = Last->Package();
 809             Dsc[J].Version = Last->Version();
 810             Dsc[J].Dsc = flNotDir(I->Path);
 811          }
 812
 813          // Handle the only options so that multiple can be used at once
 814          if (diffOnly == true || tarOnly == true || dscOnly == true)
 815          {
 816             if ((diffOnly == true && I->Type == "diff") ||
 817                 (tarOnly == true && I->Type == "tar") ||
 818                 (dscOnly == true && I->Type == "dsc"))
 819                 ; // Fine, we want this file downloaded
 820             else
 821                continue;
 822          }
 823
 824          // don't download the same uri twice (should this be moved to
 825          // the fetcher interface itself?)
 826          if(queued.find(Last->Index().ArchiveURI(I->Path)) != queued.end())
 827             continue;
 828          queued.insert(Last->Index().ArchiveURI(I->Path));
 829
 830          // check if we have a file with that md5 sum already localy
 831          std::string localFile = flNotDir(I->Path);
 832          if (FileExists(localFile) == true)
 833             if(I->Hashes.VerifyFile(localFile) == true)
 834             {
 835                ioprintf(c1out,_("Skipping already downloaded file '%s'\n"),
 836                         localFile.c_str());
 837                continue;
 838             }
 839
 840          // see if we have a hash (Acquire::ForceHash is the only way to have none)
 841          HashString const * const hs = I->Hashes.find(NULL);
 842          if (hs == NULL && _config->FindB("APT::Get::AllowUnauthenticated",false) == false)
 843          {
 844             ioprintf(c1out, "Skipping download of file '%s' as requested hashsum is not available for authentication\n",
 845                      localFile.c_str());
 846             continue;
 847          }
 848
 849          new pkgAcqFile(&Fetcher,Last->Index().ArchiveURI(I->Path),
 850                         hs != NULL ? hs->toStr() : "", I->Size,
 851                         Last->Index().SourceInfo(*Last,*I),Src);
 852       }
 853    }
 854
 855    // Display statistics
 856    unsigned long long FetchBytes = Fetcher.FetchNeeded();
 857    unsigned long long FetchPBytes = Fetcher.PartialPresent();
 858    unsigned long long DebBytes = Fetcher.TotalNeeded();
 859
 860    // Check for enough free space
 861    struct statvfs Buf;
 862    string OutputDir = ".";
 863    if (statvfs(OutputDir.c_str(),&Buf) != 0) {
 864       if (errno == EOVERFLOW)
 865          return _error->WarningE("statvfs",_("Couldn't determine free space in %s"),
 866                                 OutputDir.c_str());
 867       else
 868          return _error->Errno("statvfs",_("Couldn't determine free space in %s"),
 869                                 OutputDir.c_str());
 870    } else if (unsigned(Buf.f_bfree) < (FetchBytes - FetchPBytes)/Buf.f_bsize)
 871      {
 872        struct statfs Stat;
 873        if (statfs(OutputDir.c_str(),&Stat) != 0
 874 #if HAVE_STRUCT_STATFS_F_TYPE
 875            || unsigned(Stat.f_type) != RAMFS_MAGIC
 876 #endif
 877            )  {
 878           return _error->Error(_("You don't have enough free space in %s"),
 879               OutputDir.c_str());
 880        }
 881      }
 882
 883    // Number of bytes
 884    if (DebBytes != FetchBytes)
 885       //TRANSLATOR: The required space between number and unit is already included
 886       // in the replacement strings, so %sB will be correctly translate in e.g. 1,5 MB
 887       ioprintf(c1out,_("Need to get %sB/%sB of source archives.\n"),
 888                SizeToStr(FetchBytes).c_str(),SizeToStr(DebBytes).c_str());
 889    else
 890       //TRANSLATOR: The required space between number and unit is already included
 891       // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
 892       ioprintf(c1out,_("Need to get %sB of source archives.\n"),
 893                SizeToStr(DebBytes).c_str());
 894
 895    if (_config->FindB("APT::Get::Simulate",false) == true)
 896    {
 897       for (unsigned I = 0; I != J; I++)
 898          ioprintf(cout,_("Fetch source %s\n"),Dsc[I].Package.c_str());
 899       return true;
 900    }
 901
 902    // Just print out the uris an exit if the --print-uris flag was used
 903    if (_config->FindB("APT::Get::Print-URIs") == true)
 904    {
 905       pkgAcquire::UriIterator I = Fetcher.UriBegin();
 906       for (; I != Fetcher.UriEnd(); ++I)
 907          cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
 908                I->Owner->FileSize << ' ' << I->Owner->HashSum() << endl;
 909       return true;
 910    }
 911
 912    // Run it
 913    bool Failed = false;
 914    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
 915    {
 916       return _error->Error(_("Failed to fetch some archives."));
 917    }
 918
 919    if (_config->FindB("APT::Get::Download-only",false) == true)
 920    {
 921       c1out << _("Download complete and in download only mode") << endl;
 922       return true;
 923    }
 924
 925    // Unpack the sources
 926    pid_t Process = ExecFork();
 927
 928    if (Process == 0)
 929    {
 930       bool const fixBroken = _config->FindB("APT::Get::Fix-Broken", false);
 931       for (unsigned I = 0; I != J; ++I)
 932       {
 933          string Dir = Dsc[I].Package + '-' + Cache->VS().UpstreamVersion(Dsc[I].Version.c_str());
 934
 935          // Diff only mode only fetches .diff files
 936          if (_config->FindB("APT::Get::Diff-Only",false) == true ||
 937              _config->FindB("APT::Get::Tar-Only",false) == true ||
 938              Dsc[I].Dsc.empty() == true)
 939             continue;
 940
 941          // See if the package is already unpacked
 942          struct stat Stat;
 943          if (fixBroken == false && stat(Dir.c_str(),&Stat) == 0 &&
 944              S_ISDIR(Stat.st_mode) != 0)
 945          {
 946             ioprintf(c0out ,_("Skipping unpack of already unpacked source in %s\n"),
 947                               Dir.c_str());
 948          }
 949          else
 950          {
 951             // Call dpkg-source
 952             char S[500];
 953             snprintf(S,sizeof(S),"%s -x %s",
 954                      _config->Find("Dir::Bin::dpkg-source","dpkg-source").c_str(),
 955                      Dsc[I].Dsc.c_str());
 956             if (system(S) != 0)
 957             {
 958                fprintf(stderr,_("Unpack command '%s' failed.\n"),S);
 959                fprintf(stderr,_("Check if the 'dpkg-dev' package is installed.\n"));
 960                _exit(1);
 961             }
 962          }
 963
 964          // Try to compile it with dpkg-buildpackage
 965          if (_config->FindB("APT::Get::Compile",false) == true)
 966          {
 967             string buildopts = _config->Find("APT::Get::Host-Architecture");
 968             if (buildopts.empty() == false)
 969                buildopts = "-a" + buildopts + " ";
 970
 971             // get all active build profiles
 972             std::string const profiles = APT::Configuration::getBuildProfilesString();
 973             if (profiles.empty() == false)
 974                buildopts.append(" -P").append(profiles).append(" ");
 975
 976             buildopts.append(_config->Find("DPkg::Build-Options","-b -uc"));
 977
 978             // Call dpkg-buildpackage
 979             char S[500];
 980             snprintf(S,sizeof(S),"cd %s && %s %s",
 981                      Dir.c_str(),
 982                      _config->Find("Dir::Bin::dpkg-buildpackage","dpkg-buildpackage").c_str(),
 983                      buildopts.c_str());
 984
 985             if (system(S) != 0)
 986             {
 987                fprintf(stderr,_("Build command '%s' failed.\n"),S);
 988                _exit(1);
 989             }
 990          }
 991       }
 992
 993       _exit(0);
 994    }
 995
 996    // Wait for the subprocess
 997    int Status = 0;
 998    while (waitpid(Process,&Status,0) != Process)
 999    {
1000       if (errno == EINTR)
1001          continue;
1002       return _error->Errno("waitpid","Couldn't wait for subprocess");
1003    }
1004
1005    if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1006       return _error->Error(_("Child process failed"));
1007
1008    return true;
1009 }
1010                                                                         /*}}}*/
1011 // DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
1012 // ---------------------------------------------------------------------
1013 /* This function will look at the build depends list of the given source
1014    package and install the necessary packages to make it true, or fail. */
1015 static bool DoBuildDep(CommandLine &CmdL)
1016 {
1017    CacheFile Cache;
1018
1019    _config->Set("APT::Install-Recommends", false);
1020
1021    if (Cache.Open(true) == false)
1022       return false;
1023
1024    if (CmdL.FileSize() <= 1)
1025       return _error->Error(_("Must specify at least one package to check builddeps for"));
1026
1027    // Read the source list
1028    if (Cache.BuildSourceList() == false)
1029       return false;
1030    pkgSourceList *List = Cache.GetSourceList();
1031
1032    // Create the text record parsers
1033    pkgRecords Recs(Cache);
1034    pkgSrcRecords SrcRecs(*List);
1035    if (_error->PendingError() == true)
1036       return false;
1037
1038    // Create the download object
1039    AcqTextStatus Stat(ScreenWidth,_config->FindI("quiet",0));
1040    pkgAcquire Fetcher;
1041    if (Fetcher.Setup(&Stat) == false)
1042       return false;
1043
1044    bool StripMultiArch;
1045    string hostArch = _config->Find("APT::Get::Host-Architecture");
1046    if (hostArch.empty() == false)
1047    {
1048       std::vector<std::string> archs = APT::Configuration::getArchitectures();
1049       if (std::find(archs.begin(), archs.end(), hostArch) == archs.end())
1050          return _error->Error(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
1051       StripMultiArch = false;
1052    }
1053    else
1054       StripMultiArch = true;
1055
1056    unsigned J = 0;
1057    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
1058    {
1059       string Src;
1060       pkgSrcRecords::Parser *Last = 0;
1061
1062       // a unpacked debian source tree
1063       if (DirectoryExists(*I))
1064       {
1065          // FIXME: how can we make this more elegant?
1066          std::string TypeName = "debian/control File Source Index";
1067          pkgIndexFile::Type *Type = pkgIndexFile::Type::GetType(TypeName.c_str());
1068          if(Type != NULL)
1069             Last = Type->CreateSrcPkgParser(*I);
1070       }
1071       // if its a local file (e.g. .dsc) use this
1072       else if (FileExists(*I))
1073       {
1074          // see if we can get a parser for this pkgIndexFile type
1075          string TypeName = flExtension(*I) + " File Source Index";
1076          pkgIndexFile::Type *Type = pkgIndexFile::Type::GetType(TypeName.c_str());
1077          if(Type != NULL)
1078             Last = Type->CreateSrcPkgParser(*I);
1079       } else {
1080          // normal case, search the cache for the source file
1081          Last = FindSrc(*I,Recs,SrcRecs,Src,Cache);
1082       }
1083
1084       if (Last == 0)
1085          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
1086
1087       // Process the build-dependencies
1088       vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
1089       // FIXME: Can't specify architecture to use for [wildcard] matching, so switch default arch temporary
1090       if (hostArch.empty() == false)
1091       {
1092          std::string nativeArch = _config->Find("APT::Architecture");
1093          _config->Set("APT::Architecture", hostArch);
1094          bool Success = Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch);
1095          _config->Set("APT::Architecture", nativeArch);
1096          if (Success == false)
1097             return _error->Error(_("Unable to get build-dependency information for %s"),Src.c_str());
1098       }
1099       else if (Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch) == false)
1100             return _error->Error(_("Unable to get build-dependency information for %s"),Src.c_str());
1101
1102       // Also ensure that build-essential packages are present
1103       Configuration::Item const *Opts = _config->Tree("APT::Build-Essential");
1104       if (Opts)
1105          Opts = Opts->Child;
1106       for (; Opts; Opts = Opts->Next)
1107       {
1108          if (Opts->Value.empty() == true)
1109             continue;
1110
1111          pkgSrcRecords::Parser::BuildDepRec rec;
1112          rec.Package = Opts->Value;
1113          rec.Type = pkgSrcRecords::Parser::BuildDependIndep;
1114          rec.Op = 0;
1115          BuildDeps.push_back(rec);
1116       }
1117
1118       if (BuildDeps.empty() == true)
1119       {
1120          ioprintf(c1out,_("%s has no build depends.\n"),Src.c_str());
1121          continue;
1122       }
1123
1124       // Install the requested packages
1125       vector <pkgSrcRecords::Parser::BuildDepRec>::iterator D;
1126       pkgProblemResolver Fix(Cache);
1127       bool skipAlternatives = false; // skip remaining alternatives in an or group
1128       for (D = BuildDeps.begin(); D != BuildDeps.end(); ++D)
1129       {
1130          bool hasAlternatives = (((*D).Op & pkgCache::Dep::Or) == pkgCache::Dep::Or);
1131
1132          if (skipAlternatives == true)
1133          {
1134             /*
1135              * if there are alternatives, we've already picked one, so skip
1136              * the rest
1137              *
1138              * TODO: this means that if there's a build-dep on A|B and B is
1139              * installed, we'll still try to install A; more importantly,
1140              * if A is currently broken, we cannot go back and try B. To fix
1141              * this would require we do a Resolve cycle for each package we
1142              * add to the install list. Ugh
1143              */
1144             if (!hasAlternatives)
1145                skipAlternatives = false; // end of or group
1146             continue;
1147          }
1148
1149          if ((*D).Type == pkgSrcRecords::Parser::BuildConflict ||
1150              (*D).Type == pkgSrcRecords::Parser::BuildConflictIndep)
1151          {
1152             pkgCache::GrpIterator Grp = Cache->FindGrp((*D).Package);
1153             // Build-conflicts on unknown packages are silently ignored
1154             if (Grp.end() == true)
1155                continue;
1156
1157             for (pkgCache::PkgIterator Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
1158             {
1159                pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
1160                /*
1161                 * Remove if we have an installed version that satisfies the
1162                 * version criteria
1163                 */
1164                if (IV.end() == false &&
1165                    Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
1166                   TryToInstallBuildDep(Pkg,Cache,Fix,true,false);
1167             }
1168          }
1169          else // BuildDep || BuildDepIndep
1170          {
1171             if (_config->FindB("Debug::BuildDeps",false) == true)
1172                  cout << "Looking for " << (*D).Package << "...\n";
1173
1174             pkgCache::PkgIterator Pkg;
1175
1176             // Cross-Building?
1177             if (StripMultiArch == false && D->Type != pkgSrcRecords::Parser::BuildDependIndep)
1178             {
1179                size_t const colon = D->Package.find(":");
1180                if (colon != string::npos)
1181                {
1182                   if (strcmp(D->Package.c_str() + colon, ":any") == 0 || strcmp(D->Package.c_str() + colon, ":native") == 0)
1183                      Pkg = Cache->FindPkg(D->Package.substr(0,colon));
1184                   else
1185                      Pkg = Cache->FindPkg(D->Package);
1186                }
1187                else
1188                   Pkg = Cache->FindPkg(D->Package, hostArch);
1189
1190                // a bad version either is invalid or doesn't satify dependency
1191                #define BADVER(Ver) (Ver.end() == true || \
1192                                     (D->Version.empty() == false && \
1193                                      Cache->VS().CheckDep(Ver.VerStr(),D->Op,D->Version.c_str()) == false))
1194
1195                APT::VersionList verlist;
1196                if (Pkg.end() == false)
1197                {
1198                   pkgCache::VerIterator Ver = (*Cache)[Pkg].InstVerIter(*Cache);
1199                   if (BADVER(Ver) == false)
1200                      verlist.insert(Ver);
1201                   Ver = (*Cache)[Pkg].CandidateVerIter(*Cache);
1202                   if (BADVER(Ver) == false)
1203                      verlist.insert(Ver);
1204                }
1205                if (verlist.empty() == true)
1206                {
1207                   pkgCache::PkgIterator BuildPkg = Cache->FindPkg(D->Package, "native");
1208                   if (BuildPkg.end() == false && Pkg != BuildPkg)
1209                   {
1210                      pkgCache::VerIterator Ver = (*Cache)[BuildPkg].InstVerIter(*Cache);
1211                      if (BADVER(Ver) == false)
1212                         verlist.insert(Ver);
1213                      Ver = (*Cache)[BuildPkg].CandidateVerIter(*Cache);
1214                      if (BADVER(Ver) == false)
1215                         verlist.insert(Ver);
1216                   }
1217                }
1218                #undef BADVER
1219
1220                string forbidden;
1221                // We need to decide if host or build arch, so find a version we can look at
1222                APT::VersionList::const_iterator Ver = verlist.begin();
1223                for (; Ver != verlist.end(); ++Ver)
1224                {
1225                   forbidden.clear();
1226                   if (Ver->MultiArch == pkgCache::Version::None || Ver->MultiArch == pkgCache::Version::All)
1227                   {
1228                      if (colon == string::npos)
1229                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
1230                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
1231                         forbidden = "Multi-Arch: none";
1232                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
1233                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1234                   }
1235                   else if (Ver->MultiArch == pkgCache::Version::Same)
1236                   {
1237                      if (colon == string::npos)
1238                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
1239                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
1240                         forbidden = "Multi-Arch: same";
1241                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
1242                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1243                   }
1244                   else if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign)
1245                   {
1246                      if (colon == string::npos)
1247                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1248                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0 ||
1249                               strcmp(D->Package.c_str() + colon, ":native") == 0)
1250                         forbidden = "Multi-Arch: foreign";
1251                   }
1252                   else if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)
1253                   {
1254                      if (colon == string::npos)
1255                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
1256                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
1257                      {
1258                         // prefer any installed over preferred non-installed architectures
1259                         pkgCache::GrpIterator Grp = Ver.ParentPkg().Group();
1260                         // we don't check for version here as we are better of with upgrading than remove and install
1261                         for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
1262                            if (Pkg.CurrentVer().end() == false)
1263                               break;
1264                         if (Pkg.end() == true)
1265                            Pkg = Grp.FindPreferredPkg(true);
1266                      }
1267                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
1268                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1269                   }
1270
1271                   if (forbidden.empty() == false)
1272                   {
1273                      if (_config->FindB("Debug::BuildDeps",false) == true)
1274                         cout << D->Package.substr(colon, string::npos) << " is not allowed from " << forbidden << " package " << (*D).Package << " (" << Ver.VerStr() << ")" << endl;
1275                      continue;
1276                   }
1277
1278                   //we found a good version
1279                   break;
1280                }
1281                if (Ver == verlist.end())
1282                {
1283                   if (_config->FindB("Debug::BuildDeps",false) == true)
1284                      cout << " No multiarch info as we have no satisfying installed nor candidate for " << D->Package << " on build or host arch" << endl;
1285
1286                   if (forbidden.empty() == false)
1287                   {
1288                      if (hasAlternatives)
1289                         continue;
1290                      return _error->Error(_("%s dependency for %s can't be satisfied "
1291                                             "because %s is not allowed on '%s' packages"),
1292                                           Last->BuildDepType(D->Type), Src.c_str(),
1293                                           D->Package.c_str(), forbidden.c_str());
1294                   }
1295                }
1296             }
1297             else
1298                Pkg = Cache->FindPkg(D->Package);
1299
1300             if (Pkg.end() == true || (Pkg->VersionList == 0 && Pkg->ProvidesList == 0))
1301             {
1302                if (_config->FindB("Debug::BuildDeps",false) == true)
1303                     cout << " (not found)" << (*D).Package << endl;
1304
1305                if (hasAlternatives)
1306                   continue;
1307
1308                return _error->Error(_("%s dependency for %s cannot be satisfied "
1309                                       "because the package %s cannot be found"),
1310                                     Last->BuildDepType((*D).Type),Src.c_str(),
1311                                     (*D).Package.c_str());
1312             }
1313
1314             pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
1315             if (IV.end() == false)
1316             {
1317                if (_config->FindB("Debug::BuildDeps",false) == true)
1318                   cout << "  Is installed\n";
1319
1320                if (D->Version.empty() == true ||
1321                    Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
1322                {
1323                   skipAlternatives = hasAlternatives;
1324                   continue;
1325                }
1326
1327                if (_config->FindB("Debug::BuildDeps",false) == true)
1328                   cout << "    ...but the installed version doesn't meet the version requirement\n";
1329
1330                if (((*D).Op & pkgCache::Dep::LessEq) == pkgCache::Dep::LessEq)
1331                   return _error->Error(_("Failed to satisfy %s dependency for %s: Installed package %s is too new"),
1332                                         Last->BuildDepType((*D).Type), Src.c_str(), Pkg.FullName(true).c_str());
1333             }
1334
1335             // Only consider virtual packages if there is no versioned dependency
1336             if ((*D).Version.empty() == true)
1337             {
1338                /*
1339                 * If this is a virtual package, we need to check the list of
1340                 * packages that provide it and see if any of those are
1341                 * installed
1342                 */
1343                pkgCache::PrvIterator Prv = Pkg.ProvidesList();
1344                for (; Prv.end() != true; ++Prv)
1345                {
1346                   if (_config->FindB("Debug::BuildDeps",false) == true)
1347                      cout << "  Checking provider " << Prv.OwnerPkg().FullName() << endl;
1348
1349                   if ((*Cache)[Prv.OwnerPkg()].InstVerIter(*Cache).end() == false)
1350                      break;
1351                }
1352
1353                if (Prv.end() == false)
1354                {
1355                   if (_config->FindB("Debug::BuildDeps",false) == true)
1356                      cout << "  Is provided by installed package " << Prv.OwnerPkg().FullName() << endl;
1357                   skipAlternatives = hasAlternatives;
1358                   continue;
1359                }
1360             }
1361             else // versioned dependency
1362             {
1363                pkgCache::VerIterator CV = (*Cache)[Pkg].CandidateVerIter(*Cache);
1364                if (CV.end() == true ||
1365                    Cache->VS().CheckDep(CV.VerStr(),(*D).Op,(*D).Version.c_str()) == false)
1366                {
1367                   if (hasAlternatives)
1368                      continue;
1369                   else if (CV.end() == false)
1370                      return _error->Error(_("%s dependency for %s cannot be satisfied "
1371                                             "because candidate version of package %s "
1372                                             "can't satisfy version requirements"),
1373                                           Last->BuildDepType(D->Type), Src.c_str(),
1374                                           D->Package.c_str());
1375                   else
1376                      return _error->Error(_("%s dependency for %s cannot be satisfied "
1377                                             "because package %s has no candidate version"),
1378                                           Last->BuildDepType(D->Type), Src.c_str(),
1379                                           D->Package.c_str());
1380                }
1381             }
1382
1383             if (TryToInstallBuildDep(Pkg,Cache,Fix,false,false,false) == true)
1384             {
1385                // We successfully installed something; skip remaining alternatives
1386                skipAlternatives = hasAlternatives;
1387                if(_config->FindB("APT::Get::Build-Dep-Automatic", false) == true)
1388                   Cache->MarkAuto(Pkg, true);
1389                continue;
1390             }
1391             else if (hasAlternatives)
1392             {
1393                if (_config->FindB("Debug::BuildDeps",false) == true)
1394                   cout << "  Unsatisfiable, trying alternatives\n";
1395                continue;
1396             }
1397             else
1398             {
1399                return _error->Error(_("Failed to satisfy %s dependency for %s: %s"),
1400                                     Last->BuildDepType((*D).Type),
1401                                     Src.c_str(),
1402                                     (*D).Package.c_str());
1403             }
1404          }
1405       }
1406
1407       if (Fix.Resolve(true) == false)
1408          _error->Discard();
1409
1410       // Now we check the state of the packages,
1411       if (Cache->BrokenCount() != 0)
1412       {
1413          ShowBroken(cout, Cache, false);
1414          return _error->Error(_("Build-dependencies for %s could not be satisfied."),*I);
1415       }
1416    }
1417
1418    if (InstallPackages(Cache, false, true) == false)
1419       return _error->Error(_("Failed to process build dependencies"));
1420    return true;
1421 }
1422                                                                         /*}}}*/
1423 // GetChangelogPath - return a path pointing to a changelog file or dir /*{{{*/
1424 // ---------------------------------------------------------------------
1425 /* This returns a "path" string for the changelog url construction.
1426  * Please note that its not complete, it either needs a "/changelog"
1427  * appended (for the packages.debian.org/changelogs site) or a
1428  * ".changelog" (for third party sites that store the changelog in the
1429  * pool/ next to the deb itself)
1430  * Example return: "pool/main/a/apt/apt_0.8.8ubuntu3"
1431  */
1432 static string GetChangelogPath(CacheFile &Cache,
1433                         pkgCache::PkgIterator Pkg,
1434                         pkgCache::VerIterator Ver)
1435 {
1436    string path;
1437
1438    pkgRecords Recs(Cache);
1439    pkgRecords::Parser &rec=Recs.Lookup(Ver.FileList());
1440    string srcpkg = rec.SourcePkg().empty() ? Pkg.Name() : rec.SourcePkg();
1441    string ver = Ver.VerStr();
1442    // if there is a source version it always wins
1443    if (rec.SourceVer() != "")
1444       ver = rec.SourceVer();
1445    path = flNotFile(rec.FileName());
1446    path += srcpkg + "_" + StripEpoch(ver);
1447    return path;
1448 }
1449                                                                         /*}}}*/
1450 // GuessThirdPartyChangelogUri - return url                             /*{{{*/
1451 // ---------------------------------------------------------------------
1452 /* Contruct a changelog file path for third party sites that do not use
1453  * packages.debian.org/changelogs
1454  * This simply uses the ArchiveURI() of the source pkg and looks for
1455  * a .changelog file there, Example for "mediabuntu":
1456  * apt-get changelog mplayer-doc:
1457  *  http://packages.medibuntu.org/pool/non-free/m/mplayer/mplayer_1.0~rc4~try1.dsfg1-1ubuntu1+medibuntu1.changelog
1458  */
1459 static bool GuessThirdPartyChangelogUri(CacheFile &Cache,
1460                                  pkgCache::PkgIterator Pkg,
1461                                  pkgCache::VerIterator Ver,
1462                                  string &out_uri)
1463 {
1464    // get the binary deb server path
1465    pkgCache::VerFileIterator Vf = Ver.FileList();
1466    if (Vf.end() == true)
1467       return false;
1468    pkgCache::PkgFileIterator F = Vf.File();
1469    pkgIndexFile *index;
1470    pkgSourceList *SrcList = Cache.GetSourceList();
1471    if(SrcList->FindIndex(F, index) == false)
1472       return false;
1473
1474    // get archive uri for the binary deb
1475    string path_without_dot_changelog = GetChangelogPath(Cache, Pkg, Ver);
1476    out_uri = index->ArchiveURI(path_without_dot_changelog + ".changelog");
1477
1478    // now strip away the filename and add srcpkg_srcver.changelog
1479    return true;
1480 }
1481                                                                         /*}}}*/
1482 // DownloadChangelog - Download the changelog                           /*{{{*/
1483 // ---------------------------------------------------------------------
1484 static bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher,
1485                        pkgCache::VerIterator Ver, string targetfile)
1486 /* Download a changelog file for the given package version to
1487  * targetfile. This will first try the server from Apt::Changelogs::Server
1488  * (http://packages.debian.org/changelogs by default) and if that gives
1489  * a 404 tries to get it from the archive directly (see
1490  * GuessThirdPartyChangelogUri for details how)
1491  */
1492 {
1493    string path;
1494    string descr;
1495    string server;
1496    string changelog_uri;
1497
1498    // data structures we need
1499    pkgCache::PkgIterator Pkg = Ver.ParentPkg();
1500
1501    // make the server root configurable
1502    server = _config->Find("Apt::Changelogs::Server",
1503                           "http://packages.debian.org/changelogs");
1504    path = GetChangelogPath(CacheFile, Pkg, Ver);
1505    strprintf(changelog_uri, "%s/%s/changelog", server.c_str(), path.c_str());
1506    if (_config->FindB("APT::Get::Print-URIs", false) == true)
1507    {
1508       std::cout << '\'' << changelog_uri << '\'' << std::endl;
1509       return true;
1510    }
1511
1512    strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), changelog_uri.c_str());
1513    // queue it
1514    new pkgAcqFile(&Fetcher, changelog_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
1515
1516    // try downloading it, if that fails, try third-party-changelogs location
1517    // FIXME: Fetcher.Run() is "Continue" even if I get a 404?!?
1518    Fetcher.Run();
1519    if (!FileExists(targetfile))
1520    {
1521       string third_party_uri;
1522       if (GuessThirdPartyChangelogUri(CacheFile, Pkg, Ver, third_party_uri))
1523       {
1524          strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), third_party_uri.c_str());
1525          new pkgAcqFile(&Fetcher, third_party_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
1526          Fetcher.Run();
1527       }
1528    }
1529
1530    if (FileExists(targetfile))
1531       return true;
1532
1533    // error
1534    return _error->Error("changelog download failed");
1535 }
1536                                                                         /*}}}*/
1537 // DoChangelog - Get changelog from the command line                    /*{{{*/
1538 // ---------------------------------------------------------------------
1539 static bool DoChangelog(CommandLine &CmdL)
1540 {
1541    CacheFile Cache;
1542    if (Cache.ReadOnlyOpen() == false)
1543       return false;
1544
1545    APT::CacheSetHelper helper(c0out);
1546    APT::VersionList verset = APT::VersionList::FromCommandLine(Cache,
1547                 CmdL.FileList + 1, APT::VersionList::CANDIDATE, helper);
1548    if (verset.empty() == true)
1549       return false;
1550    pkgAcquire Fetcher;
1551
1552    if (_config->FindB("APT::Get::Print-URIs", false) == true)
1553    {
1554       bool Success = true;
1555       for (APT::VersionList::const_iterator Ver = verset.begin();
1556            Ver != verset.end(); ++Ver)
1557          Success &= DownloadChangelog(Cache, Fetcher, Ver, "");
1558       return Success;
1559    }
1560
1561    AcqTextStatus Stat(ScreenWidth, _config->FindI("quiet",0));
1562    Fetcher.Setup(&Stat);
1563
1564    bool const downOnly = _config->FindB("APT::Get::Download-Only", false);
1565
1566    char tmpname[100];
1567    const char* tmpdir = NULL;
1568    if (downOnly == false)
1569    {
1570       std::string systemTemp = GetTempDir();
1571       snprintf(tmpname, sizeof(tmpname), "%s/apt-changelog-XXXXXX",
1572                systemTemp.c_str());
1573       tmpdir = mkdtemp(tmpname);
1574       if (tmpdir == NULL)
1575          return _error->Errno("mkdtemp", "mkdtemp failed");
1576    }
1577
1578    for (APT::VersionList::const_iterator Ver = verset.begin();
1579         Ver != verset.end();
1580         ++Ver)
1581    {
1582       string changelogfile;
1583       if (downOnly == false)
1584          changelogfile.append(tmpname).append("changelog");
1585       else
1586          changelogfile.append(Ver.ParentPkg().Name()).append(".changelog");
1587       if (DownloadChangelog(Cache, Fetcher, Ver, changelogfile) && downOnly == false)
1588       {
1589          DisplayFileInPager(changelogfile);
1590          // cleanup temp file
1591          unlink(changelogfile.c_str());
1592       }
1593    }
1594    // clenaup tmp dir
1595    if (tmpdir != NULL)
1596       rmdir(tmpdir);
1597    return true;
1598 }
1599                                                                         /*}}}*/
1600 // ShowHelp - Show a help screen                                        /*{{{*/
1601 // ---------------------------------------------------------------------
1602 /* */
1603 static bool ShowHelp(CommandLine &)
1604 {
1605    ioprintf(cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,PACKAGE_VERSION,
1606             COMMON_ARCH,__DATE__,__TIME__);
1607
1608    if (_config->FindB("version") == true)
1609    {
1610       cout << _("Supported modules:") << endl;
1611
1612       for (unsigned I = 0; I != pkgVersioningSystem::GlobalListLen; I++)
1613       {
1614          pkgVersioningSystem *VS = pkgVersioningSystem::GlobalList[I];
1615          if (_system != 0 && _system->VS == VS)
1616             cout << '*';
1617          else
1618             cout << ' ';
1619          cout << "Ver: " << VS->Label << endl;
1620
1621          /* Print out all the packaging systems that will work with
1622             this VS */
1623          for (unsigned J = 0; J != pkgSystem::GlobalListLen; J++)
1624          {
1625             pkgSystem *Sys = pkgSystem::GlobalList[J];
1626             if (_system == Sys)
1627                cout << '*';
1628             else
1629                cout << ' ';
1630             if (Sys->VS->TestCompatibility(*VS) == true)
1631                cout << "Pkg:  " << Sys->Label << " (Priority " << Sys->Score(*_config) << ")" << endl;
1632          }
1633       }
1634
1635       for (unsigned I = 0; I != pkgSourceList::Type::GlobalListLen; I++)
1636       {
1637          pkgSourceList::Type *Type = pkgSourceList::Type::GlobalList[I];
1638          cout << " S.L: '" << Type->Name << "' " << Type->Label << endl;
1639       }
1640
1641       for (unsigned I = 0; I != pkgIndexFile::Type::GlobalListLen; I++)
1642       {
1643          pkgIndexFile::Type *Type = pkgIndexFile::Type::GlobalList[I];
1644          cout << " Idx: " << Type->Label << endl;
1645       }
1646
1647       return true;
1648    }
1649
1650    cout <<
1651     _("Usage: apt-get [options] command\n"
1652       "       apt-get [options] install|remove pkg1 [pkg2 ...]\n"
1653       "       apt-get [options] source pkg1 [pkg2 ...]\n"
1654       "\n"
1655       "apt-get is a simple command line interface for downloading and\n"
1656       "installing packages. The most frequently used commands are update\n"
1657       "and install.\n"
1658       "\n"
1659       "Commands:\n"
1660       "   update - Retrieve new lists of packages\n"
1661       "   upgrade - Perform an upgrade\n"
1662       "   install - Install new packages (pkg is libc6 not libc6.deb)\n"
1663       "   remove - Remove packages\n"
1664       "   autoremove - Remove automatically all unused packages\n"
1665       "   purge - Remove packages and config files\n"
1666       "   source - Download source archives\n"
1667       "   build-dep - Configure build-dependencies for source packages\n"
1668       "   dist-upgrade - Distribution upgrade, see apt-get(8)\n"
1669       "   dselect-upgrade - Follow dselect selections\n"
1670       "   clean - Erase downloaded archive files\n"
1671       "   autoclean - Erase old downloaded archive files\n"
1672       "   check - Verify that there are no broken dependencies\n"
1673       "   changelog - Download and display the changelog for the given package\n"
1674       "   download - Download the binary package into the current directory\n"
1675       "\n"
1676       "Options:\n"
1677       "  -h  This help text.\n"
1678       "  -q  Loggable output - no progress indicator\n"
1679       "  -qq No output except for errors\n"
1680       "  -d  Download only - do NOT install or unpack archives\n"
1681       "  -s  No-act. Perform ordering simulation\n"
1682       "  -y  Assume Yes to all queries and do not prompt\n"
1683       "  -f  Attempt to correct a system with broken dependencies in place\n"
1684       "  -m  Attempt to continue if archives are unlocatable\n"
1685       "  -u  Show a list of upgraded packages as well\n"
1686       "  -b  Build the source package after fetching it\n"
1687       "  -V  Show verbose version numbers\n"
1688       "  -c=? Read this configuration file\n"
1689       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n"
1690       "See the apt-get(8), sources.list(5) and apt.conf(5) manual\n"
1691       "pages for more information and options.\n"
1692       "                       This APT has Super Cow Powers.\n");
1693    return true;
1694 }
1695                                                                         /*}}}*/
1696 int main(int argc,const char *argv[])                                   /*{{{*/
1697 {
1698    CommandLine::Dispatch Cmds[] = {{"update",&DoUpdate},
1699                                    {"upgrade",&DoUpgrade},
1700                                    {"install",&DoInstall},
1701                                    {"remove",&DoInstall},
1702                                    {"purge",&DoInstall},
1703                                    {"autoremove",&DoInstall},
1704                                    {"markauto",&DoMarkAuto},
1705                                    {"unmarkauto",&DoMarkAuto},
1706                                    {"dist-upgrade",&DoDistUpgrade},
1707                                    {"dselect-upgrade",&DoDSelectUpgrade},
1708                                    {"build-dep",&DoBuildDep},
1709                                    {"clean",&DoClean},
1710                                    {"autoclean",&DoAutoClean},
1711                                    {"check",&DoCheck},
1712                                    {"source",&DoSource},
1713                                    {"download",&DoDownload},
1714                                    {"changelog",&DoChangelog},
1715                                    {"moo",&DoMoo},
1716                                    {"help",&ShowHelp},
1717                                    {0,0}};
1718
1719    std::vector<CommandLine::Args> Args = getCommandArgs("apt-get", CommandLine::GetCommand(Cmds, argc, argv));
1720
1721    // Set up gettext support
1722    setlocale(LC_ALL,"");
1723    textdomain(PACKAGE);
1724
1725    // Parse the command line and initialize the package library
1726    CommandLine CmdL(Args.data(),_config);
1727    if (pkgInitConfig(*_config) == false ||
1728        CmdL.Parse(argc,argv) == false ||
1729        pkgInitSystem(*_config,_system) == false)
1730    {
1731       if (_config->FindB("version") == true)
1732          ShowHelp(CmdL);
1733
1734       _error->DumpErrors();
1735       return 100;
1736    }
1737
1738    // See if the help should be shown
1739    if (_config->FindB("help") == true ||
1740        _config->FindB("version") == true ||
1741        CmdL.FileSize() == 0)
1742    {
1743       ShowHelp(CmdL);
1744       return 0;
1745    }
1746
1747    // see if we are in simulate mode
1748    CheckSimulateMode(CmdL);
1749
1750    // Init the signals
1751    InitSignals();
1752
1753    // Setup the output streams
1754    InitOutput();
1755
1756    // Match the operation
1757    CmdL.DispatchArg(Cmds);
1758
1759    // Print any errors or warnings found during parsing
1760    bool const Errors = _error->PendingError();
1761    if (_config->FindI("quiet",0) > 0)
1762       _error->DumpErrors();
1763    else
1764       _error->DumpErrors(GlobalError::DEBUG);
1765    return Errors == true ? 100 : 0;
1766 }
1767                                                                         /*}}}*/