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,
 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                   Src = Ver.SourcePkgName();
 307                   // the Version we have is possibly fuzzy or includes binUploads,
 308                   // so we use the Version of the SourcePkg
 309                   VerTag = Ver.SourceVerStr();
 310                   break;
 311                }
 312             }
 313             if (Src.empty() == false)
 314                break;
 315          }
 316       }
 317
 318       if (Src == "" && ArchTag != "")
 319       {
 320          if (VerTag != "")
 321             _error->Error(_("Can not find a package '%s' with version '%s'"),
 322                           Pkg.FullName().c_str(), VerTag.c_str());
 323          if (RelTag != "")
 324             _error->Error(_("Can not find a package '%s' with release '%s'"),
 325                           Pkg.FullName().c_str(), RelTag.c_str());
 326          Src = Name;
 327          return 0;
 328       }
 329
 330
 331       if (Src.empty() == true)
 332       {
 333          // if we don't have found a fitting package yet so we will
 334          // choose a good candidate and proceed with that.
 335          // Maybe we will find a source later on with the right VerTag
 336          // or RelTag
 337          pkgCache::VerIterator Ver = Cache->GetCandidateVer(Pkg);
 338          if (Ver.end() == false)
 339          {
 340             if (strcmp(Ver.SourcePkgName(),Ver.ParentPkg().Name()) != 0)
 341                Src = Ver.SourcePkgName();
 342             if (VerTag.empty() == true && strcmp(Ver.SourceVerStr(),Ver.VerStr()) != 0)
 343                VerTag = Ver.SourceVerStr();
 344          }
 345       }
 346    }
 347
 348    if (Src.empty() == true)
 349    {
 350       Src = TmpSrc;
 351    }
 352    else
 353    {
 354       /* if we have a source pkg name, make sure to only search
 355          for srcpkg names, otherwise apt gets confused if there
 356          is a binary package "pkg1" and a source package "pkg1"
 357          with the same name but that comes from different packages */
 358       MatchSrcOnly = true;
 359       if (Src != TmpSrc)
 360       {
 361          ioprintf(c1out, _("Picking '%s' as source package instead of '%s'\n"), Src.c_str(), TmpSrc.c_str());
 362       }
 363    }
 364
 365    // The best hit
 366    pkgSrcRecords::Parser *Last = 0;
 367    unsigned long Offset = 0;
 368    string Version;
 369    pkgSourceList *SrcList = CacheFile.GetSourceList();
 370
 371    /* Iterate over all of the hits, which includes the resulting
 372       binary packages in the search */
 373    pkgSrcRecords::Parser *Parse;
 374    while (true)
 375    {
 376       SrcRecs.Restart();
 377       while ((Parse = SrcRecs.Find(Src.c_str(), MatchSrcOnly)) != 0)
 378       {
 379          const string Ver = Parse->Version();
 380
 381          // See if we need to look for a specific release tag
 382          if (RelTag != "" && UserRequestedVerTag == "")
 383          {
 384             const string Rel = GetReleaseForSourceRecord(SrcList, Parse);
 385
 386             if (Rel == RelTag)
 387             {
 388                Last = Parse;
 389                Offset = Parse->Offset();
 390                Version = Ver;
 391             }
 392          }
 393
 394          // Ignore all versions which doesn't fit
 395          if (VerTag.empty() == false &&
 396              Cache->VS().CmpVersion(VerTag, Ver) != 0) // exact match
 397             continue;
 398
 399          // Newer version or an exact match? Save the hit
 400          if (Last == 0 || Cache->VS().CmpVersion(Version,Ver) < 0) {
 401             Last = Parse;
 402             Offset = Parse->Offset();
 403             Version = Ver;
 404          }
 405
 406          // was the version check above an exact match?
 407          // If so, we don't need to look further
 408          if (VerTag.empty() == false && (VerTag == Ver))
 409             break;
 410       }
 411       if (UserRequestedVerTag == "" && Version != "" && RelTag != "")
 412          ioprintf(c1out, "Selected version '%s' (%s) for %s\n",
 413                   Version.c_str(), RelTag.c_str(), Src.c_str());
 414
 415       if (Last != 0 || VerTag.empty() == true)
 416          break;
 417       _error->Error(_("Can not find version '%s' of package '%s'"), VerTag.c_str(), TmpSrc.c_str());
 418       return 0;
 419    }
 420
 421    if (Last == 0 || Last->Jump(Offset) == false)
 422       return 0;
 423
 424    return Last;
 425 }
 426                                                                         /*}}}*/
 427 /* mark packages as automatically/manually installed.                   {{{*/
 428 static bool DoMarkAuto(CommandLine &CmdL)
 429 {
 430    bool Action = true;
 431    int AutoMarkChanged = 0;
 432    OpTextProgress progress;
 433    CacheFile Cache;
 434    if (Cache.Open() == false)
 435       return false;
 436
 437    if (strcasecmp(CmdL.FileList[0],"markauto") == 0)
 438       Action = true;
 439    else if (strcasecmp(CmdL.FileList[0],"unmarkauto") == 0)
 440       Action = false;
 441
 442    for (const char **I = CmdL.FileList + 1; *I != 0; I++)
 443    {
 444       const char *S = *I;
 445       // Locate the package
 446       pkgCache::PkgIterator Pkg = Cache->FindPkg(S);
 447       if (Pkg.end() == true) {
 448          return _error->Error(_("Couldn't find package %s"),S);
 449       }
 450       else
 451       {
 452          if (!Action)
 453             ioprintf(c1out,_("%s set to manually installed.\n"), Pkg.Name());
 454          else
 455             ioprintf(c1out,_("%s set to automatically installed.\n"),
 456                       Pkg.Name());
 457
 458          Cache->MarkAuto(Pkg,Action);
 459          AutoMarkChanged++;
 460       }
 461    }
 462
 463    _error->Notice(_("This command is deprecated. Please use 'apt-mark auto' and 'apt-mark manual' instead."));
 464
 465    if (AutoMarkChanged && ! _config->FindB("APT::Get::Simulate",false))
 466       return Cache->writeStateFile(NULL);
 467    return false;
 468 }
 469                                                                         /*}}}*/
 470 // DoDSelectUpgrade - Do an upgrade by following dselects selections    /*{{{*/
 471 // ---------------------------------------------------------------------
 472 /* Follows dselect's selections */
 473 static bool DoDSelectUpgrade(CommandLine &)
 474 {
 475    CacheFile Cache;
 476    if (Cache.OpenForInstall() == false || Cache.CheckDeps() == false)
 477       return false;
 478
 479    pkgDepCache::ActionGroup group(Cache);
 480
 481    // Install everything with the install flag set
 482    pkgCache::PkgIterator I = Cache->PkgBegin();
 483    for (;I.end() != true; ++I)
 484    {
 485       /* Install the package only if it is a new install, the autoupgrader
 486          will deal with the rest */
 487       if (I->SelectedState == pkgCache::State::Install)
 488          Cache->MarkInstall(I,false);
 489    }
 490
 491    /* Now install their deps too, if we do this above then order of
 492       the status file is significant for | groups */
 493    for (I = Cache->PkgBegin();I.end() != true; ++I)
 494    {
 495       /* Install the package only if it is a new install, the autoupgrader
 496          will deal with the rest */
 497       if (I->SelectedState == pkgCache::State::Install)
 498          Cache->MarkInstall(I,true);
 499    }
 500
 501    // Apply erasures now, they override everything else.
 502    for (I = Cache->PkgBegin();I.end() != true; ++I)
 503    {
 504       // Remove packages
 505       if (I->SelectedState == pkgCache::State::DeInstall ||
 506           I->SelectedState == pkgCache::State::Purge)
 507          Cache->MarkDelete(I,I->SelectedState == pkgCache::State::Purge);
 508    }
 509
 510    /* Resolve any problems that dselect created, allupgrade cannot handle
 511       such things. We do so quite aggressively too.. */
 512    if (Cache->BrokenCount() != 0)
 513    {
 514       pkgProblemResolver Fix(Cache);
 515
 516       // Hold back held packages.
 517       if (_config->FindB("APT::Ignore-Hold",false) == false)
 518       {
 519          for (pkgCache::PkgIterator I = Cache->PkgBegin(); I.end() == false; ++I)
 520          {
 521             if (I->SelectedState == pkgCache::State::Hold)
 522             {
 523                Fix.Protect(I);
 524                Cache->MarkKeep(I);
 525             }
 526          }
 527       }
 528
 529       if (Fix.Resolve() == false)
 530       {
 531          ShowBroken(c1out,Cache,false);
 532          return _error->Error(_("Internal error, problem resolver broke stuff"));
 533       }
 534    }
 535
 536    // Now upgrade everything
 537    if (APT::Upgrade::Upgrade(Cache, APT::Upgrade::FORBID_REMOVE_PACKAGES | APT::Upgrade::FORBID_INSTALL_NEW_PACKAGES) == false)
 538    {
 539       ShowBroken(c1out,Cache,false);
 540       return _error->Error(_("Internal error, problem resolver broke stuff"));
 541    }
 542
 543    return InstallPackages(Cache,false);
 544 }
 545                                                                         /*}}}*/
 546 // DoClean - Remove download archives                                   /*{{{*/
 547 // ---------------------------------------------------------------------
 548 /* */
 549 static bool DoClean(CommandLine &)
 550 {
 551    std::string const archivedir = _config->FindDir("Dir::Cache::archives");
 552    std::string const listsdir = _config->FindDir("Dir::state::lists");
 553
 554    if (_config->FindB("APT::Get::Simulate") == true)
 555    {
 556       std::string const pkgcache = _config->FindFile("Dir::cache::pkgcache");
 557       std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
 558       cout << "Del " << archivedir << "* " << archivedir << "partial/*"<< endl
 559            << "Del " << listsdir << "partial/*" << endl
 560            << "Del " << pkgcache << " " << srcpkgcache << endl;
 561       return true;
 562    }
 563
 564    bool const NoLocking = _config->FindB("Debug::NoLocking",false);
 565    // Lock the archive directory
 566    FileFd Lock;
 567    if (NoLocking == false)
 568    {
 569       int lock_fd = GetLock(archivedir + "lock");
 570       if (lock_fd < 0)
 571          return _error->Error(_("Unable to lock directory %s"), archivedir.c_str());
 572       Lock.Fd(lock_fd);
 573    }
 574
 575    pkgAcquire Fetcher;
 576    Fetcher.Clean(archivedir);
 577    Fetcher.Clean(archivedir + "partial/");
 578
 579    if (NoLocking == false)
 580    {
 581       Lock.Close();
 582       int lock_fd = GetLock(listsdir + "lock");
 583       if (lock_fd < 0)
 584          return _error->Error(_("Unable to lock directory %s"), listsdir.c_str());
 585       Lock.Fd(lock_fd);
 586    }
 587
 588    Fetcher.Clean(listsdir + "partial/");
 589
 590    pkgCacheFile::RemoveCaches();
 591
 592    return true;
 593 }
 594                                                                         /*}}}*/
 595 // DoAutoClean - Smartly remove downloaded archives                     /*{{{*/
 596 // ---------------------------------------------------------------------
 597 /* This is similar to clean but it only purges things that cannot be
 598    downloaded, that is old versions of cached packages. */
 599 class LogCleaner : public pkgArchiveCleaner
 600 {
 601    protected:
 602    virtual void Erase(const char *File,string Pkg,string Ver,struct stat &St)
 603    {
 604       c1out << "Del " << Pkg << " " << Ver << " [" << SizeToStr(St.st_size) << "B]" << endl;
 605
 606       if (_config->FindB("APT::Get::Simulate") == false)
 607          unlink(File);
 608    };
 609 };
 610
 611 static bool DoAutoClean(CommandLine &)
 612 {
 613    // Lock the archive directory
 614    FileFd Lock;
 615    if (_config->FindB("Debug::NoLocking",false) == false)
 616    {
 617       int lock_fd = GetLock(_config->FindDir("Dir::Cache::Archives") + "lock");
 618       if (lock_fd < 0)
 619          return _error->Error(_("Unable to lock the download directory"));
 620       Lock.Fd(lock_fd);
 621    }
 622
 623    CacheFile Cache;
 624    if (Cache.Open() == false)
 625       return false;
 626
 627    LogCleaner Cleaner;
 628
 629    return Cleaner.Go(_config->FindDir("Dir::Cache::archives"),*Cache) &&
 630       Cleaner.Go(_config->FindDir("Dir::Cache::archives") + "partial/",*Cache);
 631 }
 632                                                                         /*}}}*/
 633 // DoDownload - download a binary                                       /*{{{*/
 634 // ---------------------------------------------------------------------
 635 static bool DoDownload(CommandLine &CmdL)
 636 {
 637    CacheFile Cache;
 638    if (Cache.ReadOnlyOpen() == false)
 639       return false;
 640
 641    APT::CacheSetHelper helper(c0out);
 642    APT::VersionSet verset = APT::VersionSet::FromCommandLine(Cache,
 643                 CmdL.FileList + 1, APT::CacheSetHelper::CANDIDATE, helper);
 644
 645    if (verset.empty() == true)
 646       return false;
 647
 648    AcqTextStatus Stat(ScreenWidth, _config->FindI("quiet", 0));
 649    pkgAcquire Fetcher(&Stat);
 650
 651    pkgRecords Recs(Cache);
 652    pkgSourceList *SrcList = Cache.GetSourceList();
 653
 654    // reuse the usual acquire methods for deb files, but don't drop them into
 655    // the usual directories - keep everything in the current directory
 656    std::vector<std::string> storefile(verset.size());
 657    std::string const cwd = SafeGetCWD();
 658    _config->Set("Dir::Cache::Archives", cwd);
 659    int i = 0;
 660    for (APT::VersionSet::const_iterator Ver = verset.begin();
 661          Ver != verset.end(); ++Ver, ++i)
 662    {
 663       pkgAcquire::Item *I = new pkgAcqArchive(&Fetcher, SrcList, &Recs, *Ver, storefile[i]);
 664       std::string const filename = cwd + flNotDir(storefile[i]);
 665       storefile[i].assign(filename);
 666       I->DestFile.assign(filename);
 667    }
 668
 669    // Just print out the uris and exit if the --print-uris flag was used
 670    if (_config->FindB("APT::Get::Print-URIs") == true)
 671    {
 672       pkgAcquire::UriIterator I = Fetcher.UriBegin();
 673       for (; I != Fetcher.UriEnd(); ++I)
 674          cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile)  << ' ' <<
 675                I->Owner->FileSize << ' ' << I->Owner->HashSum() << endl;
 676       return true;
 677    }
 678
 679    // Disable drop-privs if "_apt" can not write to the target dir
 680    CheckDropPrivsMustBeDisabled(Fetcher);
 681
 682    if (_error->PendingError() == true || CheckAuth(Fetcher, false) == false)
 683       return false;
 684
 685    bool Failed = false;
 686    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false)
 687       return false;
 688
 689    // copy files in local sources to the current directory
 690    for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); I != Fetcher.ItemsEnd(); ++I)
 691    {
 692       std::string const filename = cwd + flNotDir((*I)->DestFile);
 693       if ((*I)->Local == true &&
 694           filename != (*I)->DestFile &&
 695           (*I)->Status == pkgAcquire::Item::StatDone)
 696       {
 697          std::ifstream src((*I)->DestFile.c_str(), std::ios::binary);
 698          std::ofstream dst(filename.c_str(), std::ios::binary);
 699          dst << src.rdbuf();
 700       }
 701    }
 702    return Failed == false;
 703 }
 704                                                                         /*}}}*/
 705 // DoCheck - Perform the check operation                                /*{{{*/
 706 // ---------------------------------------------------------------------
 707 /* Opening automatically checks the system, this command is mostly used
 708    for debugging */
 709 static bool DoCheck(CommandLine &)
 710 {
 711    CacheFile Cache;
 712    Cache.Open();
 713    Cache.CheckDeps();
 714
 715    return true;
 716 }
 717                                                                         /*}}}*/
 718 // DoSource - Fetch a source archive                                    /*{{{*/
 719 // ---------------------------------------------------------------------
 720 /* Fetch souce packages */
 721 struct DscFile
 722 {
 723    string Package;
 724    string Version;
 725    string Dsc;
 726 };
 727
 728 static bool DoSource(CommandLine &CmdL)
 729 {
 730    CacheFile Cache;
 731    if (Cache.Open(false) == false)
 732       return false;
 733
 734    if (CmdL.FileSize() <= 1)
 735       return _error->Error(_("Must specify at least one package to fetch source for"));
 736
 737    // Read the source list
 738    if (Cache.BuildSourceList() == false)
 739       return false;
 740    pkgSourceList *List = Cache.GetSourceList();
 741
 742    // Create the text record parsers
 743    pkgSrcRecords SrcRecs(*List);
 744    if (_error->PendingError() == true)
 745       return false;
 746
 747    // Create the download object
 748    AcqTextStatus Stat(ScreenWidth,_config->FindI("quiet",0));
 749    pkgAcquire Fetcher(&Stat);
 750
 751    SPtrArray<DscFile> Dsc = new DscFile[CmdL.FileSize()];
 752
 753    // insert all downloaded uris into this set to avoid downloading them
 754    // twice
 755    set<string> queued;
 756
 757    // Diff only mode only fetches .diff files
 758    bool const diffOnly = _config->FindB("APT::Get::Diff-Only", false);
 759    // Tar only mode only fetches .tar files
 760    bool const tarOnly = _config->FindB("APT::Get::Tar-Only", false);
 761    // Dsc only mode only fetches .dsc files
 762    bool const dscOnly = _config->FindB("APT::Get::Dsc-Only", false);
 763
 764    // Load the requestd sources into the fetcher
 765    unsigned J = 0;
 766    std::string UntrustedList;
 767    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
 768    {
 769       string Src;
 770       pkgSrcRecords::Parser *Last = FindSrc(*I,SrcRecs,Src,Cache);
 771
 772       if (Last == 0) {
 773          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
 774       }
 775
 776       if (Last->Index().IsTrusted() == false)
 777          UntrustedList += Src + " ";
 778
 779       string srec = Last->AsStr();
 780       string::size_type pos = srec.find("\nVcs-");
 781       while (pos != string::npos)
 782       {
 783          pos += strlen("\nVcs-");
 784          string vcs = srec.substr(pos,srec.find(":",pos)-pos);
 785          if(vcs == "Browser")
 786          {
 787             pos = srec.find("\nVcs-", pos);
 788             continue;
 789          }
 790          pos += vcs.length()+2;
 791          string::size_type epos = srec.find("\n", pos);
 792          string uri = srec.substr(pos,epos-pos).c_str();
 793          ioprintf(c1out, _("NOTICE: '%s' packaging is maintained in "
 794                            "the '%s' version control system at:\n"
 795                            "%s\n"),
 796                   Src.c_str(), vcs.c_str(), uri.c_str());
 797          if(vcs == "Bzr")
 798             ioprintf(c1out,_("Please use:\n"
 799                              "bzr branch %s\n"
 800                              "to retrieve the latest (possibly unreleased) "
 801                              "updates to the package.\n"),
 802                      uri.c_str());
 803          break;
 804       }
 805
 806       // Back track
 807       vector<pkgSrcRecords::File> Lst;
 808       if (Last->Files(Lst) == false) {
 809          return false;
 810       }
 811
 812       // Load them into the fetcher
 813       for (vector<pkgSrcRecords::File>::const_iterator I = Lst.begin();
 814            I != Lst.end(); ++I)
 815       {
 816          // Try to guess what sort of file it is we are getting.
 817          if (I->Type == "dsc")
 818          {
 819             Dsc[J].Package = Last->Package();
 820             Dsc[J].Version = Last->Version();
 821             Dsc[J].Dsc = flNotDir(I->Path);
 822          }
 823
 824          // Handle the only options so that multiple can be used at once
 825          if (diffOnly == true || tarOnly == true || dscOnly == true)
 826          {
 827             if ((diffOnly == true && I->Type == "diff") ||
 828                 (tarOnly == true && I->Type == "tar") ||
 829                 (dscOnly == true && I->Type == "dsc"))
 830                 ; // Fine, we want this file downloaded
 831             else
 832                continue;
 833          }
 834
 835          // don't download the same uri twice (should this be moved to
 836          // the fetcher interface itself?)
 837          if(queued.find(Last->Index().ArchiveURI(I->Path)) != queued.end())
 838             continue;
 839          queued.insert(Last->Index().ArchiveURI(I->Path));
 840
 841          // check if we have a file with that md5 sum already localy
 842          std::string localFile = flNotDir(I->Path);
 843          if (FileExists(localFile) == true)
 844             if(I->Hashes.VerifyFile(localFile) == true)
 845             {
 846                ioprintf(c1out,_("Skipping already downloaded file '%s'\n"),
 847                         localFile.c_str());
 848                continue;
 849             }
 850
 851          // see if we have a hash (Acquire::ForceHash is the only way to have none)
 852          if (I->Hashes.usable() == false && _config->FindB("APT::Get::AllowUnauthenticated",false) == false)
 853          {
 854             ioprintf(c1out, "Skipping download of file '%s' as requested hashsum is not available for authentication\n",
 855                      localFile.c_str());
 856             continue;
 857          }
 858
 859          new pkgAcqFile(&Fetcher,Last->Index().ArchiveURI(I->Path),
 860                         I->Hashes, I->Size, Last->Index().SourceInfo(*Last,*I), Src);
 861       }
 862    }
 863
 864    // Display statistics
 865    unsigned long long FetchBytes = Fetcher.FetchNeeded();
 866    unsigned long long FetchPBytes = Fetcher.PartialPresent();
 867    unsigned long long DebBytes = Fetcher.TotalNeeded();
 868
 869    // Check for enough free space
 870    struct statvfs Buf;
 871    string OutputDir = ".";
 872    if (statvfs(OutputDir.c_str(),&Buf) != 0) {
 873       if (errno == EOVERFLOW)
 874          return _error->WarningE("statvfs",_("Couldn't determine free space in %s"),
 875                                 OutputDir.c_str());
 876       else
 877          return _error->Errno("statvfs",_("Couldn't determine free space in %s"),
 878                                 OutputDir.c_str());
 879    } else if (unsigned(Buf.f_bfree) < (FetchBytes - FetchPBytes)/Buf.f_bsize)
 880      {
 881        struct statfs Stat;
 882        if (statfs(OutputDir.c_str(),&Stat) != 0
 883 #if HAVE_STRUCT_STATFS_F_TYPE
 884            || unsigned(Stat.f_type) != RAMFS_MAGIC
 885 #endif
 886            )  {
 887           return _error->Error(_("You don't have enough free space in %s"),
 888               OutputDir.c_str());
 889        }
 890      }
 891
 892    // Number of bytes
 893    if (DebBytes != FetchBytes)
 894       //TRANSLATOR: The required space between number and unit is already included
 895       // in the replacement strings, so %sB will be correctly translate in e.g. 1,5 MB
 896       ioprintf(c1out,_("Need to get %sB/%sB of source archives.\n"),
 897                SizeToStr(FetchBytes).c_str(),SizeToStr(DebBytes).c_str());
 898    else
 899       //TRANSLATOR: The required space between number and unit is already included
 900       // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
 901       ioprintf(c1out,_("Need to get %sB of source archives.\n"),
 902                SizeToStr(DebBytes).c_str());
 903
 904    if (_config->FindB("APT::Get::Simulate",false) == true)
 905    {
 906       for (unsigned I = 0; I != J; I++)
 907          ioprintf(cout,_("Fetch source %s\n"),Dsc[I].Package.c_str());
 908       return true;
 909    }
 910
 911    // Just print out the uris an exit if the --print-uris flag was used
 912    if (_config->FindB("APT::Get::Print-URIs") == true)
 913    {
 914       pkgAcquire::UriIterator I = Fetcher.UriBegin();
 915       for (; I != Fetcher.UriEnd(); ++I)
 916          cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
 917                I->Owner->FileSize << ' ' << I->Owner->HashSum() << endl;
 918       return true;
 919    }
 920
 921    // Disable drop-privs if "_apt" can not write to the target dir
 922    CheckDropPrivsMustBeDisabled(Fetcher);
 923
 924    // check authentication status of the source as well
 925    if (UntrustedList != "" && !AuthPrompt(UntrustedList, false))
 926       return false;
 927
 928    // Run it
 929    bool Failed = false;
 930    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
 931    {
 932       return _error->Error(_("Failed to fetch some archives."));
 933    }
 934
 935    if (_config->FindB("APT::Get::Download-only",false) == true)
 936    {
 937       c1out << _("Download complete and in download only mode") << endl;
 938       return true;
 939    }
 940
 941    // Unpack the sources
 942    pid_t Process = ExecFork();
 943
 944    if (Process == 0)
 945    {
 946       bool const fixBroken = _config->FindB("APT::Get::Fix-Broken", false);
 947       for (unsigned I = 0; I != J; ++I)
 948       {
 949          string Dir = Dsc[I].Package + '-' + Cache->VS().UpstreamVersion(Dsc[I].Version.c_str());
 950
 951          // Diff only mode only fetches .diff files
 952          if (_config->FindB("APT::Get::Diff-Only",false) == true ||
 953              _config->FindB("APT::Get::Tar-Only",false) == true ||
 954              Dsc[I].Dsc.empty() == true)
 955             continue;
 956
 957          // See if the package is already unpacked
 958          struct stat Stat;
 959          if (fixBroken == false && stat(Dir.c_str(),&Stat) == 0 &&
 960              S_ISDIR(Stat.st_mode) != 0)
 961          {
 962             ioprintf(c0out ,_("Skipping unpack of already unpacked source in %s\n"),
 963                               Dir.c_str());
 964          }
 965          else
 966          {
 967             // Call dpkg-source
 968             std::string const sourceopts = _config->Find("DPkg::Source-Options", "-x");
 969             std::string S;
 970             strprintf(S, "%s %s %s",
 971                      _config->Find("Dir::Bin::dpkg-source","dpkg-source").c_str(),
 972                      sourceopts.c_str(), Dsc[I].Dsc.c_str());
 973             if (system(S.c_str()) != 0)
 974             {
 975                fprintf(stderr, _("Unpack command '%s' failed.\n"), S.c_str());
 976                fprintf(stderr, _("Check if the 'dpkg-dev' package is installed.\n"));
 977                _exit(1);
 978             }
 979          }
 980
 981          // Try to compile it with dpkg-buildpackage
 982          if (_config->FindB("APT::Get::Compile",false) == true)
 983          {
 984             string buildopts = _config->Find("APT::Get::Host-Architecture");
 985             if (buildopts.empty() == false)
 986                buildopts = "-a" + buildopts + " ";
 987
 988             // get all active build profiles
 989             std::string const profiles = APT::Configuration::getBuildProfilesString();
 990             if (profiles.empty() == false)
 991                buildopts.append(" -P").append(profiles).append(" ");
 992
 993             buildopts.append(_config->Find("DPkg::Build-Options","-b -uc"));
 994
 995             // Call dpkg-buildpackage
 996             std::string S;
 997             strprintf(S, "cd %s && %s %s",
 998                      Dir.c_str(),
 999                      _config->Find("Dir::Bin::dpkg-buildpackage","dpkg-buildpackage").c_str(),
1000                      buildopts.c_str());
1001
1002             if (system(S.c_str()) != 0)
1003             {
1004                fprintf(stderr, _("Build command '%s' failed.\n"), S.c_str());
1005                _exit(1);
1006             }
1007          }
1008       }
1009
1010       _exit(0);
1011    }
1012
1013    // Wait for the subprocess
1014    int Status = 0;
1015    while (waitpid(Process,&Status,0) != Process)
1016    {
1017       if (errno == EINTR)
1018          continue;
1019       return _error->Errno("waitpid","Couldn't wait for subprocess");
1020    }
1021
1022    if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1023       return _error->Error(_("Child process failed"));
1024
1025    return true;
1026 }
1027                                                                         /*}}}*/
1028 // DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
1029 // ---------------------------------------------------------------------
1030 /* This function will look at the build depends list of the given source
1031    package and install the necessary packages to make it true, or fail. */
1032 static bool DoBuildDep(CommandLine &CmdL)
1033 {
1034    CacheFile Cache;
1035
1036    _config->Set("APT::Install-Recommends", false);
1037
1038    if (Cache.Open(true) == false)
1039       return false;
1040
1041    if (CmdL.FileSize() <= 1)
1042       return _error->Error(_("Must specify at least one package to check builddeps for"));
1043
1044    // Read the source list
1045    if (Cache.BuildSourceList() == false)
1046       return false;
1047    pkgSourceList *List = Cache.GetSourceList();
1048
1049    // Create the text record parsers
1050    pkgSrcRecords SrcRecs(*List);
1051    if (_error->PendingError() == true)
1052       return false;
1053
1054    bool StripMultiArch;
1055    string hostArch = _config->Find("APT::Get::Host-Architecture");
1056    if (hostArch.empty() == false)
1057    {
1058       std::vector<std::string> archs = APT::Configuration::getArchitectures();
1059       if (std::find(archs.begin(), archs.end(), hostArch) == archs.end())
1060          return _error->Error(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
1061       StripMultiArch = false;
1062    }
1063    else
1064       StripMultiArch = true;
1065
1066    unsigned J = 0;
1067    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
1068    {
1069       string Src;
1070       pkgSrcRecords::Parser *Last = 0;
1071
1072       // an unpacked debian source tree
1073       using APT::String::Startswith;
1074       if ((Startswith(*I, "./") || Startswith(*I, "/")) &&
1075           DirectoryExists(*I))
1076       {
1077          ioprintf(c1out, _("Note, using directory '%s' to get the build dependencies\n"), *I);
1078          // FIXME: how can we make this more elegant?
1079          std::string TypeName = "debian/control File Source Index";
1080          pkgIndexFile::Type *Type = pkgIndexFile::Type::GetType(TypeName.c_str());
1081          if(Type != NULL)
1082             Last = Type->CreateSrcPkgParser(*I);
1083       }
1084       // if its a local file (e.g. .dsc) use this
1085       else if (FileExists(*I))
1086       {
1087          ioprintf(c1out, _("Note, using file '%s' to get the build dependencies\n"), *I);
1088
1089          // see if we can get a parser for this pkgIndexFile type
1090          string TypeName = flExtension(*I) + " File Source Index";
1091          pkgIndexFile::Type *Type = pkgIndexFile::Type::GetType(TypeName.c_str());
1092          if(Type != NULL)
1093             Last = Type->CreateSrcPkgParser(*I);
1094       } else {
1095          // normal case, search the cache for the source file
1096          Last = FindSrc(*I,SrcRecs,Src,Cache);
1097       }
1098
1099       if (Last == 0)
1100          return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
1101
1102       // Process the build-dependencies
1103       vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
1104       // FIXME: Can't specify architecture to use for [wildcard] matching, so switch default arch temporary
1105       if (hostArch.empty() == false)
1106       {
1107          std::string nativeArch = _config->Find("APT::Architecture");
1108          _config->Set("APT::Architecture", hostArch);
1109          bool Success = Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch);
1110          _config->Set("APT::Architecture", nativeArch);
1111          if (Success == false)
1112             return _error->Error(_("Unable to get build-dependency information for %s"),Src.c_str());
1113       }
1114       else if (Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), StripMultiArch) == false)
1115             return _error->Error(_("Unable to get build-dependency information for %s"),Src.c_str());
1116
1117       // Also ensure that build-essential packages are present
1118       Configuration::Item const *Opts = _config->Tree("APT::Build-Essential");
1119       if (Opts)
1120          Opts = Opts->Child;
1121       for (; Opts; Opts = Opts->Next)
1122       {
1123          if (Opts->Value.empty() == true)
1124             continue;
1125
1126          pkgSrcRecords::Parser::BuildDepRec rec;
1127          rec.Package = Opts->Value;
1128          rec.Type = pkgSrcRecords::Parser::BuildDependIndep;
1129          rec.Op = 0;
1130          BuildDeps.push_back(rec);
1131       }
1132
1133       if (BuildDeps.empty() == true)
1134       {
1135          ioprintf(c1out,_("%s has no build depends.\n"),Src.c_str());
1136          continue;
1137       }
1138
1139       // Install the requested packages
1140       vector <pkgSrcRecords::Parser::BuildDepRec>::iterator D;
1141       pkgProblemResolver Fix(Cache);
1142       bool skipAlternatives = false; // skip remaining alternatives in an or group
1143       for (D = BuildDeps.begin(); D != BuildDeps.end(); ++D)
1144       {
1145          bool hasAlternatives = (((*D).Op & pkgCache::Dep::Or) == pkgCache::Dep::Or);
1146
1147          if (skipAlternatives == true)
1148          {
1149             /*
1150              * if there are alternatives, we've already picked one, so skip
1151              * the rest
1152              *
1153              * TODO: this means that if there's a build-dep on A|B and B is
1154              * installed, we'll still try to install A; more importantly,
1155              * if A is currently broken, we cannot go back and try B. To fix
1156              * this would require we do a Resolve cycle for each package we
1157              * add to the install list. Ugh
1158              */
1159             if (!hasAlternatives)
1160                skipAlternatives = false; // end of or group
1161             continue;
1162          }
1163
1164          if ((*D).Type == pkgSrcRecords::Parser::BuildConflict ||
1165              (*D).Type == pkgSrcRecords::Parser::BuildConflictIndep)
1166          {
1167             pkgCache::GrpIterator Grp = Cache->FindGrp((*D).Package);
1168             // Build-conflicts on unknown packages are silently ignored
1169             if (Grp.end() == true)
1170                continue;
1171
1172             for (pkgCache::PkgIterator Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
1173             {
1174                pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
1175                /*
1176                 * Remove if we have an installed version that satisfies the
1177                 * version criteria
1178                 */
1179                if (IV.end() == false &&
1180                    Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
1181                   TryToInstallBuildDep(Pkg,Cache,Fix,true,false);
1182             }
1183          }
1184          else // BuildDep || BuildDepIndep
1185          {
1186             if (_config->FindB("Debug::BuildDeps",false) == true)
1187                  cout << "Looking for " << (*D).Package << "...\n";
1188
1189             pkgCache::PkgIterator Pkg;
1190
1191             // Cross-Building?
1192             if (StripMultiArch == false && D->Type != pkgSrcRecords::Parser::BuildDependIndep)
1193             {
1194                size_t const colon = D->Package.find(":");
1195                if (colon != string::npos)
1196                {
1197                   if (strcmp(D->Package.c_str() + colon, ":any") == 0 || strcmp(D->Package.c_str() + colon, ":native") == 0)
1198                      Pkg = Cache->FindPkg(D->Package.substr(0,colon));
1199                   else
1200                      Pkg = Cache->FindPkg(D->Package);
1201                }
1202                else
1203                   Pkg = Cache->FindPkg(D->Package, hostArch);
1204
1205                // a bad version either is invalid or doesn't satify dependency
1206                #define BADVER(Ver) (Ver.end() == true || \
1207                                     (D->Version.empty() == false && \
1208                                      Cache->VS().CheckDep(Ver.VerStr(),D->Op,D->Version.c_str()) == false))
1209
1210                APT::VersionList verlist;
1211                if (Pkg.end() == false)
1212                {
1213                   pkgCache::VerIterator Ver = (*Cache)[Pkg].InstVerIter(*Cache);
1214                   if (BADVER(Ver) == false)
1215                      verlist.insert(Ver);
1216                   Ver = (*Cache)[Pkg].CandidateVerIter(*Cache);
1217                   if (BADVER(Ver) == false)
1218                      verlist.insert(Ver);
1219                }
1220                if (verlist.empty() == true)
1221                {
1222                   pkgCache::PkgIterator BuildPkg = Cache->FindPkg(D->Package, "native");
1223                   if (BuildPkg.end() == false && Pkg != BuildPkg)
1224                   {
1225                      pkgCache::VerIterator Ver = (*Cache)[BuildPkg].InstVerIter(*Cache);
1226                      if (BADVER(Ver) == false)
1227                         verlist.insert(Ver);
1228                      Ver = (*Cache)[BuildPkg].CandidateVerIter(*Cache);
1229                      if (BADVER(Ver) == false)
1230                         verlist.insert(Ver);
1231                   }
1232                }
1233                #undef BADVER
1234
1235                string forbidden;
1236                // We need to decide if host or build arch, so find a version we can look at
1237                APT::VersionList::const_iterator Ver = verlist.begin();
1238                for (; Ver != verlist.end(); ++Ver)
1239                {
1240                   forbidden.clear();
1241                   if (Ver->MultiArch == pkgCache::Version::None || Ver->MultiArch == pkgCache::Version::All)
1242                   {
1243                      if (colon == string::npos)
1244                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
1245                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
1246                         forbidden = "Multi-Arch: none";
1247                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
1248                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1249                   }
1250                   else if (Ver->MultiArch == pkgCache::Version::Same)
1251                   {
1252                      if (colon == string::npos)
1253                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
1254                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
1255                         forbidden = "Multi-Arch: same";
1256                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
1257                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1258                   }
1259                   else if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign)
1260                   {
1261                      if (colon == string::npos)
1262                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1263                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0 ||
1264                               strcmp(D->Package.c_str() + colon, ":native") == 0)
1265                         forbidden = "Multi-Arch: foreign";
1266                   }
1267                   else if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)
1268                   {
1269                      if (colon == string::npos)
1270                         Pkg = Ver.ParentPkg().Group().FindPkg(hostArch);
1271                      else if (strcmp(D->Package.c_str() + colon, ":any") == 0)
1272                      {
1273                         // prefer any installed over preferred non-installed architectures
1274                         pkgCache::GrpIterator Grp = Ver.ParentPkg().Group();
1275                         // we don't check for version here as we are better of with upgrading than remove and install
1276                         for (Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg))
1277                            if (Pkg.CurrentVer().end() == false)
1278                               break;
1279                         if (Pkg.end() == true)
1280                            Pkg = Grp.FindPreferredPkg(true);
1281                      }
1282                      else if (strcmp(D->Package.c_str() + colon, ":native") == 0)
1283                         Pkg = Ver.ParentPkg().Group().FindPkg("native");
1284                   }
1285
1286                   if (forbidden.empty() == false)
1287                   {
1288                      if (_config->FindB("Debug::BuildDeps",false) == true)
1289                         cout << D->Package.substr(colon, string::npos) << " is not allowed from " << forbidden << " package " << (*D).Package << " (" << Ver.VerStr() << ")" << endl;
1290                      continue;
1291                   }
1292
1293                   //we found a good version
1294                   break;
1295                }
1296                if (Ver == verlist.end())
1297                {
1298                   if (_config->FindB("Debug::BuildDeps",false) == true)
1299                      cout << " No multiarch info as we have no satisfying installed nor candidate for " << D->Package << " on build or host arch" << endl;
1300
1301                   if (forbidden.empty() == false)
1302                   {
1303                      if (hasAlternatives)
1304                         continue;
1305                      return _error->Error(_("%s dependency for %s can't be satisfied "
1306                                             "because %s is not allowed on '%s' packages"),
1307                                           Last->BuildDepType(D->Type), Src.c_str(),
1308                                           D->Package.c_str(), forbidden.c_str());
1309                   }
1310                }
1311             }
1312             else
1313                Pkg = Cache->FindPkg(D->Package);
1314
1315             if (Pkg.end() == true || (Pkg->VersionList == 0 && Pkg->ProvidesList == 0))
1316             {
1317                if (_config->FindB("Debug::BuildDeps",false) == true)
1318                     cout << " (not found)" << (*D).Package << endl;
1319
1320                if (hasAlternatives)
1321                   continue;
1322
1323                return _error->Error(_("%s dependency for %s cannot be satisfied "
1324                                       "because the package %s cannot be found"),
1325                                     Last->BuildDepType((*D).Type),Src.c_str(),
1326                                     (*D).Package.c_str());
1327             }
1328
1329             pkgCache::VerIterator IV = (*Cache)[Pkg].InstVerIter(*Cache);
1330             if (IV.end() == false)
1331             {
1332                if (_config->FindB("Debug::BuildDeps",false) == true)
1333                   cout << "  Is installed\n";
1334
1335                if (D->Version.empty() == true ||
1336                    Cache->VS().CheckDep(IV.VerStr(),(*D).Op,(*D).Version.c_str()) == true)
1337                {
1338                   skipAlternatives = hasAlternatives;
1339                   continue;
1340                }
1341
1342                if (_config->FindB("Debug::BuildDeps",false) == true)
1343                   cout << "    ...but the installed version doesn't meet the version requirement\n";
1344
1345                if (((*D).Op & pkgCache::Dep::LessEq) == pkgCache::Dep::LessEq)
1346                   return _error->Error(_("Failed to satisfy %s dependency for %s: Installed package %s is too new"),
1347                                         Last->BuildDepType((*D).Type), Src.c_str(), Pkg.FullName(true).c_str());
1348             }
1349
1350             // Only consider virtual packages if there is no versioned dependency
1351             if ((*D).Version.empty() == true)
1352             {
1353                /*
1354                 * If this is a virtual package, we need to check the list of
1355                 * packages that provide it and see if any of those are
1356                 * installed
1357                 */
1358                pkgCache::PrvIterator Prv = Pkg.ProvidesList();
1359                for (; Prv.end() != true; ++Prv)
1360                {
1361                   if (_config->FindB("Debug::BuildDeps",false) == true)
1362                      cout << "  Checking provider " << Prv.OwnerPkg().FullName() << endl;
1363
1364                   if ((*Cache)[Prv.OwnerPkg()].InstVerIter(*Cache).end() == false)
1365                      break;
1366                }
1367
1368                if (Prv.end() == false)
1369                {
1370                   if (_config->FindB("Debug::BuildDeps",false) == true)
1371                      cout << "  Is provided by installed package " << Prv.OwnerPkg().FullName() << endl;
1372                   skipAlternatives = hasAlternatives;
1373                   continue;
1374                }
1375             }
1376             else // versioned dependency
1377             {
1378                pkgCache::VerIterator CV = (*Cache)[Pkg].CandidateVerIter(*Cache);
1379                if (CV.end() == true ||
1380                    Cache->VS().CheckDep(CV.VerStr(),(*D).Op,(*D).Version.c_str()) == false)
1381                {
1382                   if (hasAlternatives)
1383                      continue;
1384                   else if (CV.end() == false)
1385                      return _error->Error(_("%s dependency for %s cannot be satisfied "
1386                                             "because candidate version of package %s "
1387                                             "can't satisfy version requirements"),
1388                                           Last->BuildDepType(D->Type), Src.c_str(),
1389                                           D->Package.c_str());
1390                   else
1391                      return _error->Error(_("%s dependency for %s cannot be satisfied "
1392                                             "because package %s has no candidate version"),
1393                                           Last->BuildDepType(D->Type), Src.c_str(),
1394                                           D->Package.c_str());
1395                }
1396             }
1397
1398             if (TryToInstallBuildDep(Pkg,Cache,Fix,false,false,false) == true)
1399             {
1400                // We successfully installed something; skip remaining alternatives
1401                skipAlternatives = hasAlternatives;
1402                if(_config->FindB("APT::Get::Build-Dep-Automatic", false) == true)
1403                   Cache->MarkAuto(Pkg, true);
1404                continue;
1405             }
1406             else if (hasAlternatives)
1407             {
1408                if (_config->FindB("Debug::BuildDeps",false) == true)
1409                   cout << "  Unsatisfiable, trying alternatives\n";
1410                continue;
1411             }
1412             else
1413             {
1414                return _error->Error(_("Failed to satisfy %s dependency for %s: %s"),
1415                                     Last->BuildDepType((*D).Type),
1416                                     Src.c_str(),
1417                                     (*D).Package.c_str());
1418             }
1419          }
1420       }
1421
1422       if (Fix.Resolve(true) == false)
1423          _error->Discard();
1424
1425       // Now we check the state of the packages,
1426       if (Cache->BrokenCount() != 0)
1427       {
1428          ShowBroken(cout, Cache, false);
1429          return _error->Error(_("Build-dependencies for %s could not be satisfied."),*I);
1430       }
1431    }
1432
1433    if (InstallPackages(Cache, false, true) == false)
1434       return _error->Error(_("Failed to process build dependencies"));
1435    return true;
1436 }
1437                                                                         /*}}}*/
1438 // GetChangelogPath - return a path pointing to a changelog file or dir /*{{{*/
1439 // ---------------------------------------------------------------------
1440 /* This returns a "path" string for the changelog url construction.
1441  * Please note that its not complete, it either needs a "/changelog"
1442  * appended (for the packages.debian.org/changelogs site) or a
1443  * ".changelog" (for third party sites that store the changelog in the
1444  * pool/ next to the deb itself)
1445  * Example return: "pool/main/a/apt/apt_0.8.8ubuntu3"
1446  */
1447 static string GetChangelogPath(CacheFile &Cache,
1448                         pkgCache::VerIterator Ver)
1449 {
1450    pkgRecords Recs(Cache);
1451    pkgRecords::Parser &rec=Recs.Lookup(Ver.FileList());
1452    string path = flNotFile(rec.FileName());
1453    path.append(Ver.SourcePkgName());
1454    path.append("_");
1455    path.append(StripEpoch(Ver.SourceVerStr()));
1456    return path;
1457 }
1458                                                                         /*}}}*/
1459 // GuessThirdPartyChangelogUri - return url                             /*{{{*/
1460 // ---------------------------------------------------------------------
1461 /* Contruct a changelog file path for third party sites that do not use
1462  * packages.debian.org/changelogs
1463  * This simply uses the ArchiveURI() of the source pkg and looks for
1464  * a .changelog file there, Example for "mediabuntu":
1465  * apt-get changelog mplayer-doc:
1466  *  http://packages.medibuntu.org/pool/non-free/m/mplayer/mplayer_1.0~rc4~try1.dsfg1-1ubuntu1+medibuntu1.changelog
1467  */
1468 static bool GuessThirdPartyChangelogUri(CacheFile &Cache,
1469                                  pkgCache::VerIterator Ver,
1470                                  string &out_uri)
1471 {
1472    // get the binary deb server path
1473    pkgCache::VerFileIterator Vf = Ver.FileList();
1474    if (Vf.end() == true)
1475       return false;
1476    pkgCache::PkgFileIterator F = Vf.File();
1477    pkgIndexFile *index;
1478    pkgSourceList *SrcList = Cache.GetSourceList();
1479    if(SrcList->FindIndex(F, index) == false)
1480       return false;
1481
1482    // get archive uri for the binary deb
1483    string path_without_dot_changelog = GetChangelogPath(Cache, Ver);
1484    out_uri = index->ArchiveURI(path_without_dot_changelog + ".changelog");
1485
1486    // now strip away the filename and add srcpkg_srcver.changelog
1487    return true;
1488 }
1489                                                                         /*}}}*/
1490 // DownloadChangelog - Download the changelog                           /*{{{*/
1491 // ---------------------------------------------------------------------
1492 static bool DownloadChangelog(CacheFile &CacheFile, pkgAcquire &Fetcher,
1493                        pkgCache::VerIterator Ver, string targetfile)
1494 /* Download a changelog file for the given package version to
1495  * targetfile. This will first try the server from Apt::Changelogs::Server
1496  * (http://packages.debian.org/changelogs by default) and if that gives
1497  * a 404 tries to get it from the archive directly (see
1498  * GuessThirdPartyChangelogUri for details how)
1499  */
1500 {
1501    // make the server root configurable
1502    string const server = _config->Find("Apt::Changelogs::Server",
1503                           "http://packages.debian.org/changelogs");
1504    string const path = GetChangelogPath(CacheFile, Ver);
1505    string changelog_uri;
1506    strprintf(changelog_uri, "%s/%s/changelog", server.c_str(), path.c_str());
1507    if (_config->FindB("APT::Get::Print-URIs", false) == true)
1508    {
1509       std::cout << '\'' << changelog_uri << '\'' << std::endl;
1510       return true;
1511    }
1512    pkgCache::PkgIterator const Pkg = Ver.ParentPkg();
1513
1514    string descr;
1515    strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), changelog_uri.c_str());
1516    // queue it
1517    new pkgAcqFile(&Fetcher, changelog_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
1518
1519    // Disable drop-privs if "_apt" can not write to the target dir
1520    CheckDropPrivsMustBeDisabled(Fetcher);
1521
1522    // try downloading it, if that fails, try third-party-changelogs location
1523    // FIXME: Fetcher.Run() is "Continue" even if I get a 404?!?
1524    Fetcher.Run();
1525    if (!FileExists(targetfile))
1526    {
1527       string third_party_uri;
1528       if (GuessThirdPartyChangelogUri(CacheFile, Ver, third_party_uri))
1529       {
1530          strprintf(descr, _("Changelog for %s (%s)"), Pkg.Name(), third_party_uri.c_str());
1531          new pkgAcqFile(&Fetcher, third_party_uri, "", 0, descr, Pkg.Name(), "ignored", targetfile);
1532          Fetcher.Run();
1533       }
1534    }
1535
1536    if (FileExists(targetfile))
1537       return true;
1538
1539    // error
1540    return _error->Error("changelog download failed");
1541 }
1542                                                                         /*}}}*/
1543 // DoChangelog - Get changelog from the command line                    /*{{{*/
1544 // ---------------------------------------------------------------------
1545 static bool DoChangelog(CommandLine &CmdL)
1546 {
1547    CacheFile Cache;
1548    if (Cache.ReadOnlyOpen() == false)
1549       return false;
1550
1551    APT::CacheSetHelper helper(c0out);
1552    APT::VersionList verset = APT::VersionList::FromCommandLine(Cache,
1553                 CmdL.FileList + 1, APT::CacheSetHelper::CANDIDATE, helper);
1554    if (verset.empty() == true)
1555       return false;
1556    pkgAcquire Fetcher;
1557
1558    if (_config->FindB("APT::Get::Print-URIs", false) == true)
1559    {
1560       bool Success = true;
1561       for (APT::VersionList::const_iterator Ver = verset.begin();
1562            Ver != verset.end(); ++Ver)
1563          Success &= DownloadChangelog(Cache, Fetcher, Ver, "");
1564       return Success;
1565    }
1566
1567    AcqTextStatus Stat(ScreenWidth, _config->FindI("quiet",0));
1568    Fetcher.SetLog(&Stat);
1569
1570    bool const downOnly = _config->FindB("APT::Get::Download-Only", false);
1571
1572    char tmpname[100];
1573    const char* tmpdir = NULL;
1574    if (downOnly == false)
1575    {
1576       std::string systemTemp = GetTempDir();
1577       snprintf(tmpname, sizeof(tmpname), "%s/apt-changelog-XXXXXX",
1578                systemTemp.c_str());
1579       tmpdir = mkdtemp(tmpname);
1580       if (tmpdir == NULL)
1581          return _error->Errno("mkdtemp", "mkdtemp failed");
1582    }
1583
1584    for (APT::VersionList::const_iterator Ver = verset.begin();
1585         Ver != verset.end();
1586         ++Ver)
1587    {
1588       string changelogfile;
1589       if (downOnly == false)
1590          changelogfile.append(tmpname).append("/changelog");
1591       else
1592          changelogfile.append(Ver.ParentPkg().Name()).append(".changelog");
1593       if (DownloadChangelog(Cache, Fetcher, Ver, changelogfile) && downOnly == false)
1594       {
1595          DisplayFileInPager(changelogfile);
1596          // cleanup temp file
1597          unlink(changelogfile.c_str());
1598       }
1599    }
1600    // clenaup tmp dir
1601    if (tmpdir != NULL)
1602       rmdir(tmpdir);
1603    return true;
1604 }
1605                                                                         /*}}}*/
1606 // ShowHelp - Show a help screen                                        /*{{{*/
1607 // ---------------------------------------------------------------------
1608 /* */
1609 static bool ShowHelp(CommandLine &)
1610 {
1611    ioprintf(cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,PACKAGE_VERSION,
1612             COMMON_ARCH,__DATE__,__TIME__);
1613
1614    if (_config->FindB("version") == true)
1615    {
1616       cout << _("Supported modules:") << endl;
1617
1618       for (unsigned I = 0; I != pkgVersioningSystem::GlobalListLen; I++)
1619       {
1620          pkgVersioningSystem *VS = pkgVersioningSystem::GlobalList[I];
1621          if (_system != 0 && _system->VS == VS)
1622             cout << '*';
1623          else
1624             cout << ' ';
1625          cout << "Ver: " << VS->Label << endl;
1626
1627          /* Print out all the packaging systems that will work with
1628             this VS */
1629          for (unsigned J = 0; J != pkgSystem::GlobalListLen; J++)
1630          {
1631             pkgSystem *Sys = pkgSystem::GlobalList[J];
1632             if (_system == Sys)
1633                cout << '*';
1634             else
1635                cout << ' ';
1636             if (Sys->VS->TestCompatibility(*VS) == true)
1637                cout << "Pkg:  " << Sys->Label << " (Priority " << Sys->Score(*_config) << ")" << endl;
1638          }
1639       }
1640
1641       for (unsigned I = 0; I != pkgSourceList::Type::GlobalListLen; I++)
1642       {
1643          pkgSourceList::Type *Type = pkgSourceList::Type::GlobalList[I];
1644          cout << " S.L: '" << Type->Name << "' " << Type->Label << endl;
1645       }
1646
1647       for (unsigned I = 0; I != pkgIndexFile::Type::GlobalListLen; I++)
1648       {
1649          pkgIndexFile::Type *Type = pkgIndexFile::Type::GlobalList[I];
1650          cout << " Idx: " << Type->Label << endl;
1651       }
1652
1653       return true;
1654    }
1655
1656    cout <<
1657     _("Usage: apt-get [options] command\n"
1658       "       apt-get [options] install|remove pkg1 [pkg2 ...]\n"
1659       "       apt-get [options] source pkg1 [pkg2 ...]\n"
1660       "\n"
1661       "apt-get is a simple command line interface for downloading and\n"
1662       "installing packages. The most frequently used commands are update\n"
1663       "and install.\n"
1664       "\n"
1665       "Commands:\n"
1666       "   update - Retrieve new lists of packages\n"
1667       "   upgrade - Perform an upgrade\n"
1668       "   install - Install new packages (pkg is libc6 not libc6.deb)\n"
1669       "   remove - Remove packages\n"
1670       "   autoremove - Remove automatically all unused packages\n"
1671       "   purge - Remove packages and config files\n"
1672       "   source - Download source archives\n"
1673       "   build-dep - Configure build-dependencies for source packages\n"
1674       "   dist-upgrade - Distribution upgrade, see apt-get(8)\n"
1675       "   dselect-upgrade - Follow dselect selections\n"
1676       "   clean - Erase downloaded archive files\n"
1677       "   autoclean - Erase old downloaded archive files\n"
1678       "   check - Verify that there are no broken dependencies\n"
1679       "   changelog - Download and display the changelog for the given package\n"
1680       "   download - Download the binary package into the current directory\n"
1681       "\n"
1682       "Options:\n"
1683       "  -h  This help text.\n"
1684       "  -q  Loggable output - no progress indicator\n"
1685       "  -qq No output except for errors\n"
1686       "  -d  Download only - do NOT install or unpack archives\n"
1687       "  -s  No-act. Perform ordering simulation\n"
1688       "  -y  Assume Yes to all queries and do not prompt\n"
1689       "  -f  Attempt to correct a system with broken dependencies in place\n"
1690       "  -m  Attempt to continue if archives are unlocatable\n"
1691       "  -u  Show a list of upgraded packages as well\n"
1692       "  -b  Build the source package after fetching it\n"
1693       "  -V  Show verbose version numbers\n"
1694       "  -c=? Read this configuration file\n"
1695       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n"
1696       "See the apt-get(8), sources.list(5) and apt.conf(5) manual\n"
1697       "pages for more information and options.\n"
1698       "                       This APT has Super Cow Powers.\n");
1699    return true;
1700 }
1701                                                                         /*}}}*/
1702 int main(int argc,const char *argv[])                                   /*{{{*/
1703 {
1704    CommandLine::Dispatch Cmds[] = {{"update",&DoUpdate},
1705                                    {"upgrade",&DoUpgrade},
1706                                    {"install",&DoInstall},
1707                                    {"remove",&DoInstall},
1708                                    {"purge",&DoInstall},
1709                                    {"autoremove",&DoInstall},
1710                                    {"markauto",&DoMarkAuto},
1711                                    {"unmarkauto",&DoMarkAuto},
1712                                    {"dist-upgrade",&DoDistUpgrade},
1713                                    {"dselect-upgrade",&DoDSelectUpgrade},
1714                                    {"build-dep",&DoBuildDep},
1715                                    {"clean",&DoClean},
1716                                    {"autoclean",&DoAutoClean},
1717                                    {"check",&DoCheck},
1718                                    {"source",&DoSource},
1719                                    {"download",&DoDownload},
1720                                    {"changelog",&DoChangelog},
1721                                    {"moo",&DoMoo},
1722                                    {"help",&ShowHelp},
1723                                    {0,0}};
1724
1725    std::vector<CommandLine::Args> Args = getCommandArgs("apt-get", CommandLine::GetCommand(Cmds, argc, argv));
1726
1727    // Set up gettext support
1728    setlocale(LC_ALL,"");
1729    textdomain(PACKAGE);
1730
1731    // Parse the command line and initialize the package library
1732    CommandLine CmdL(Args.data(),_config);
1733    if (pkgInitConfig(*_config) == false ||
1734        CmdL.Parse(argc,argv) == false ||
1735        pkgInitSystem(*_config,_system) == false)
1736    {
1737       if (_config->FindB("version") == true)
1738          ShowHelp(CmdL);
1739
1740       _error->DumpErrors();
1741       return 100;
1742    }
1743
1744    // See if the help should be shown
1745    if (_config->FindB("help") == true ||
1746        _config->FindB("version") == true ||
1747        CmdL.FileSize() == 0)
1748    {
1749       ShowHelp(CmdL);
1750       return 0;
1751    }
1752
1753    // see if we are in simulate mode
1754    CheckSimulateMode(CmdL);
1755
1756    // Init the signals
1757    InitSignals();
1758
1759    // Setup the output streams
1760    InitOutput();
1761
1762    // Match the operation
1763    CmdL.DispatchArg(Cmds);
1764
1765    // Print any errors or warnings found during parsing
1766    bool const Errors = _error->PendingError();
1767    if (_config->FindI("quiet",0) > 0)
1768       _error->DumpErrors();
1769    else
1770       _error->DumpErrors(GlobalError::DEBUG);
1771    return Errors == true ? 100 : 0;
1772 }
1773                                                                         /*}}}*/