apt-pkg/acquire-item.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: acquire-item.cc,v 1.46.2.9 2004/01/16 18:51:11 mdz Exp $
   4 /* ######################################################################
   5
   6    Acquire Item - Item to acquire
   7
   8    Each item can download to exactly one file at a time. This means you
   9    cannot create an item that fetches two uri's to two files at the same
  10    time. The pkgAcqIndex class creates a second class upon instantiation
  11    to fetch the other index files because of this.
  12
  13    ##################################################################### */
  14                                                                         /*}}}*/
  15 // Include Files                                                        /*{{{*/
  16 #ifdef __GNUG__
  17 #pragma implementation "apt-pkg/acquire-item.h"
  18 #endif
  19 #include <apt-pkg/acquire-item.h>
  20 #include <apt-pkg/configuration.h>
  21 #include <apt-pkg/sourcelist.h>
  22 #include <apt-pkg/vendorlist.h>
  23 #include <apt-pkg/error.h>
  24 #include <apt-pkg/strutl.h>
  25 #include <apt-pkg/fileutl.h>
  26 #include <apt-pkg/md5.h>
  27
  28 #include <apti18n.h>
  29
  30 #include <sys/stat.h>
  31 #include <unistd.h>
  32 #include <errno.h>
  33 #include <string>
  34 #include <stdio.h>
  35                                                                         /*}}}*/
  36
  37 using namespace std;
  38
  39 // Acquire::Item::Item - Constructor                                    /*{{{*/
  40 // ---------------------------------------------------------------------
  41 /* */
  42 pkgAcquire::Item::Item(pkgAcquire *Owner) : Owner(Owner), FileSize(0),
  43                        PartialSize(0), Mode(0), ID(0), Complete(false),
  44                        Local(false), QueueCounter(0)
  45 {
  46    Owner->Add(this);
  47    Status = StatIdle;
  48 }
  49                                                                         /*}}}*/
  50 // Acquire::Item::~Item - Destructor                                    /*{{{*/
  51 // ---------------------------------------------------------------------
  52 /* */
  53 pkgAcquire::Item::~Item()
  54 {
  55    Owner->Remove(this);
  56 }
  57                                                                         /*}}}*/
  58 // Acquire::Item::Failed - Item failed to download                      /*{{{*/
  59 // ---------------------------------------------------------------------
  60 /* We return to an idle state if there are still other queues that could
  61    fetch this object */
  62 void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
  63 {
  64    Status = StatIdle;
  65    ErrorText = LookupTag(Message,"Message");
  66    if (QueueCounter <= 1)
  67    {
  68       /* This indicates that the file is not available right now but might
  69          be sometime later. If we do a retry cycle then this should be
  70          retried [CDROMs] */
  71       if (Cnf->LocalOnly == true &&
  72           StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
  73       {
  74          Status = StatIdle;
  75          Dequeue();
  76          return;
  77       }
  78
  79       Status = StatError;
  80       Dequeue();
  81    }
  82 }
  83                                                                         /*}}}*/
  84 // Acquire::Item::Start - Item has begun to download                    /*{{{*/
  85 // ---------------------------------------------------------------------
  86 /* Stash status and the file size. Note that setting Complete means
  87    sub-phases of the acquire process such as decompresion are operating */
  88 void pkgAcquire::Item::Start(string /*Message*/,unsigned long Size)
  89 {
  90    Status = StatFetching;
  91    if (FileSize == 0 && Complete == false)
  92       FileSize = Size;
  93 }
  94                                                                         /*}}}*/
  95 // Acquire::Item::Done - Item downloaded OK                             /*{{{*/
  96 // ---------------------------------------------------------------------
  97 /* */
  98 void pkgAcquire::Item::Done(string Message,unsigned long Size,string,
  99                             pkgAcquire::MethodConfig *Cnf)
 100 {
 101    // We just downloaded something..
 102    string FileName = LookupTag(Message,"Filename");
 103    if (Complete == false && FileName == DestFile)
 104    {
 105       if (Owner->Log != 0)
 106          Owner->Log->Fetched(Size,atoi(LookupTag(Message,"Resume-Point","0").c_str()));
 107    }
 108
 109    if (FileSize == 0)
 110       FileSize= Size;
 111
 112    Status = StatDone;
 113    ErrorText = string();
 114    Owner->Dequeue(this);
 115 }
 116                                                                         /*}}}*/
 117 // Acquire::Item::Rename - Rename a file                                /*{{{*/
 118 // ---------------------------------------------------------------------
 119 /* This helper function is used by alot of item methods as thier final
 120    step */
 121 void pkgAcquire::Item::Rename(string From,string To)
 122 {
 123    if (rename(From.c_str(),To.c_str()) != 0)
 124    {
 125       char S[300];
 126       snprintf(S,sizeof(S),_("rename failed, %s (%s -> %s)."),strerror(errno),
 127               From.c_str(),To.c_str());
 128       Status = StatError;
 129       ErrorText = S;
 130    }
 131 }
 132                                                                         /*}}}*/
 133
 134 // AcqIndex::AcqIndex - Constructor                                     /*{{{*/
 135 // ---------------------------------------------------------------------
 136 /* The package file is added to the queue and a second class is
 137    instantiated to fetch the revision file */
 138 pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
 139                          string URI,string URIDesc,string ShortDesc,
 140                          string ExpectedMD5, string comprExt) :
 141    Item(Owner), RealURI(URI), ExpectedMD5(ExpectedMD5)
 142 {
 143    Decompression = false;
 144    Erase = false;
 145
 146    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 147    DestFile += URItoFileName(URI);
 148
 149    if(comprExt.empty())
 150    {
 151       // autoselect
 152       if(FileExists("/usr/bin/bzip2"))
 153          Desc.URI = URI + ".bz2";
 154       else
 155          Desc.URI = URI + ".gz";
 156    } else {
 157       Desc.URI = URI + comprExt;
 158    }
 159
 160    Desc.Description = URIDesc;
 161    Desc.Owner = this;
 162    Desc.ShortDesc = ShortDesc;
 163
 164    QueueURI(Desc);
 165 }
 166                                                                         /*}}}*/
 167 // AcqIndex::Custom600Headers - Insert custom request headers           /*{{{*/
 168 // ---------------------------------------------------------------------
 169 /* The only header we use is the last-modified header. */
 170 string pkgAcqIndex::Custom600Headers()
 171 {
 172    string Final = _config->FindDir("Dir::State::lists");
 173    Final += URItoFileName(RealURI);
 174
 175    struct stat Buf;
 176    if (stat(Final.c_str(),&Buf) != 0)
 177       return "\nIndex-File: true";
 178
 179    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 180 }
 181                                                                         /*}}}*/
 182
 183 void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 184 {
 185    // no .bz2 found, retry with .gz
 186    if(Desc.URI.substr(Desc.URI.size()-3,Desc.URI.size()-1) == "bz2") {
 187       Desc.URI = Desc.URI.substr(0,Desc.URI.size()-3) + "gz";
 188
 189       // retry with a gzip one
 190       new pkgAcqIndex(Owner, RealURI, Desc.Description,Desc.ShortDesc,
 191                       ExpectedMD5, string(".gz"));
 192       Status = StatDone;
 193       Complete = false;
 194       Dequeue();
 195       return;
 196    }
 197
 198
 199    Item::Failed(Message,Cnf);
 200 }
 201
 202
 203 // AcqIndex::Done - Finished a fetch                                    /*{{{*/
 204 // ---------------------------------------------------------------------
 205 /* This goes through a number of states.. On the initial fetch the
 206    method could possibly return an alternate filename which points
 207    to the uncompressed version of the file. If this is so the file
 208    is copied into the partial directory. In all other cases the file
 209    is decompressed with a gzip uri. */
 210 void pkgAcqIndex::Done(string Message,unsigned long Size,string MD5,
 211                        pkgAcquire::MethodConfig *Cfg)
 212 {
 213    Item::Done(Message,Size,MD5,Cfg);
 214
 215    if (Decompression == true)
 216    {
 217       if (_config->FindB("Debug::pkgAcquire::Auth", false))
 218       {
 219          std::cerr << std::endl << RealURI << ": Computed MD5: " << MD5;
 220          std::cerr << "  Expected MD5: " << ExpectedMD5 << std::endl;
 221       }
 222
 223       if (MD5.empty())
 224       {
 225          MD5Summation sum;
 226          FileFd Fd(DestFile, FileFd::ReadOnly);
 227          sum.AddFD(Fd.Fd(), Fd.Size());
 228          Fd.Close();
 229          MD5 = (string)sum.Result();
 230       }
 231
 232       if (!ExpectedMD5.empty() && MD5 != ExpectedMD5)
 233       {
 234          Status = StatAuthError;
 235          ErrorText = _("MD5Sum mismatch");
 236          Rename(DestFile,DestFile + ".FAILED");
 237          return;
 238       }
 239       // Done, move it into position
 240       string FinalFile = _config->FindDir("Dir::State::lists");
 241       FinalFile += URItoFileName(RealURI);
 242       Rename(DestFile,FinalFile);
 243       chmod(FinalFile.c_str(),0644);
 244
 245       /* We restore the original name to DestFile so that the clean operation
 246          will work OK */
 247       DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 248       DestFile += URItoFileName(RealURI);
 249
 250       // Remove the compressed version.
 251       if (Erase == true)
 252          unlink(DestFile.c_str());
 253       return;
 254    }
 255
 256    Erase = false;
 257    Complete = true;
 258
 259    // Handle the unzipd case
 260    string FileName = LookupTag(Message,"Alt-Filename");
 261    if (FileName.empty() == false)
 262    {
 263       // The files timestamp matches
 264       if (StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false) == true)
 265          return;
 266
 267       Decompression = true;
 268       Local = true;
 269       DestFile += ".decomp";
 270       Desc.URI = "copy:" + FileName;
 271       QueueURI(Desc);
 272       Mode = "copy";
 273       return;
 274    }
 275
 276    FileName = LookupTag(Message,"Filename");
 277    if (FileName.empty() == true)
 278    {
 279       Status = StatError;
 280       ErrorText = "Method gave a blank filename";
 281    }
 282
 283    // The files timestamp matches
 284    if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
 285       return;
 286
 287    if (FileName == DestFile)
 288       Erase = true;
 289    else
 290       Local = true;
 291
 292    string compExt = Desc.URI.substr(Desc.URI.size()-3,Desc.URI.size()-1);
 293    char *decompProg;
 294    if(compExt == "bz2")
 295       decompProg = "bzip2";
 296    else if(compExt == ".gz")
 297       decompProg = "gzip";
 298    else {
 299       _error->Error("Unsupported extension: %s", compExt.c_str());
 300       return;
 301    }
 302
 303    Decompression = true;
 304    DestFile += ".decomp";
 305    Desc.URI = string(decompProg) + ":" + FileName;
 306    QueueURI(Desc);
 307    Mode = decompProg;
 308 }
 309
 310 pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,
 311                              string URI,string URIDesc,string ShortDesc,
 312                              string MetaIndexURI, string MetaIndexURIDesc,
 313                              string MetaIndexShortDesc,
 314                              const vector<IndexTarget*>* IndexTargets,
 315                              indexRecords* MetaIndexParser) :
 316    Item(Owner), RealURI(URI), MetaIndexURI(MetaIndexURI),
 317    MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc)
 318 {
 319    this->MetaIndexParser = MetaIndexParser;
 320    this->IndexTargets = IndexTargets;
 321    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 322    DestFile += URItoFileName(URI);
 323
 324    // remove any partial downloaded sig-file. it may confuse proxies
 325    // and is too small to warrant a partial download anyway
 326    unlink(DestFile.c_str());
 327
 328    // Create the item
 329    Desc.Description = URIDesc;
 330    Desc.Owner = this;
 331    Desc.ShortDesc = ShortDesc;
 332    Desc.URI = URI;
 333
 334
 335    string Final = _config->FindDir("Dir::State::lists");
 336    Final += URItoFileName(RealURI);
 337    struct stat Buf;
 338    if (stat(Final.c_str(),&Buf) == 0)
 339    {
 340       // File was already in place.  It needs to be re-verified
 341       // because Release might have changed, so Move it into partial
 342       Rename(Final,DestFile);
 343    }
 344
 345    QueueURI(Desc);
 346 }
 347                                                                         /*}}}*/
 348 // pkgAcqMetaSig::Custom600Headers - Insert custom request headers      /*{{{*/
 349 // ---------------------------------------------------------------------
 350 /* The only header we use is the last-modified header. */
 351 string pkgAcqMetaSig::Custom600Headers()
 352 {
 353    // mvo: we don't really need the last-modified header here
 354    //      1) it points to "Final" and that was renamed to "DestFile"
 355    //         so it's never send anyway
 356    //      2) because DestFIle is in partial/ we will send a partial request
 357    //         with if-range in the http method (or the equivalent for ftp).
 358    //         that should give the same result
 359
 360    string Final = _config->FindDir("Dir::State::lists");
 361    Final += URItoFileName(RealURI);
 362
 363    struct stat Buf;
 364    if (stat(Final.c_str(),&Buf) != 0)
 365       return "\nIndex-File: true";
 366
 367    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 368 }
 369
 370 void pkgAcqMetaSig::Done(string Message,unsigned long Size,string MD5,
 371                          pkgAcquire::MethodConfig *Cfg)
 372 {
 373    Item::Done(Message,Size,MD5,Cfg);
 374
 375    string FileName = LookupTag(Message,"Filename");
 376    if (FileName.empty() == true)
 377    {
 378       Status = StatError;
 379       ErrorText = "Method gave a blank filename";
 380       return;
 381    }
 382
 383    if (FileName != DestFile)
 384    {
 385       // We have to copy it into place
 386       Local = true;
 387       Desc.URI = "copy:" + FileName;
 388       QueueURI(Desc);
 389       return;
 390    }
 391
 392    Complete = true;
 393
 394    // queue a pkgAcqMetaIndex to be verified against the sig we just retrieved
 395    new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
 396                        DestFile, IndexTargets, MetaIndexParser);
 397
 398 }
 399                                                                         /*}}}*/
 400 void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 401 {
 402    // Delete any existing sigfile, so that this source isn't
 403    // mistakenly trusted
 404    string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
 405    unlink(Final.c_str());
 406
 407    // queue a pkgAcqMetaIndex with no sigfile
 408    new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
 409                        "", IndexTargets, MetaIndexParser);
 410
 411    if (Cnf->LocalOnly == true ||
 412        StringToBool(LookupTag(Message,"Transient-Failure"),false) == false)
 413    {
 414       // Ignore this
 415       Status = StatDone;
 416       Complete = false;
 417       Dequeue();
 418       return;
 419    }
 420
 421    Item::Failed(Message,Cnf);
 422 }
 423
 424 pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner,
 425                                  string URI,string URIDesc,string ShortDesc,
 426                                  string SigFile,
 427                                  const vector<struct IndexTarget*>* IndexTargets,
 428                                  indexRecords* MetaIndexParser) :
 429   Item(Owner), RealURI(URI), SigFile(SigFile)
 430 {
 431    this->AuthPass = false;
 432    this->MetaIndexParser = MetaIndexParser;
 433    this->IndexTargets = IndexTargets;
 434    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 435    DestFile += URItoFileName(URI);
 436
 437    // Create the item
 438    Desc.Description = URIDesc;
 439    Desc.Owner = this;
 440    Desc.ShortDesc = ShortDesc;
 441    Desc.URI = URI;
 442
 443    QueueURI(Desc);
 444 }
 445
 446                                                                         /*}}}*/
 447 // pkgAcqMetaIndex::Custom600Headers - Insert custom request headers    /*{{{*/
 448 // ---------------------------------------------------------------------
 449 /* The only header we use is the last-modified header. */
 450 string pkgAcqMetaIndex::Custom600Headers()
 451 {
 452    string Final = _config->FindDir("Dir::State::lists");
 453    Final += URItoFileName(RealURI);
 454
 455    struct stat Buf;
 456    if (stat(Final.c_str(),&Buf) != 0)
 457       return "\nIndex-File: true";
 458
 459    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 460 }
 461
 462 void pkgAcqMetaIndex::Done(string Message,unsigned long Size,string MD5,
 463                            pkgAcquire::MethodConfig *Cfg)
 464 {
 465    Item::Done(Message,Size,MD5,Cfg);
 466
 467    // MetaIndexes are done in two passes: one to download the
 468    // metaindex with an appropriate method, and a second to verify it
 469    // with the gpgv method
 470
 471    if (AuthPass == true)
 472    {
 473       AuthDone(Message);
 474    }
 475    else
 476    {
 477       RetrievalDone(Message);
 478       if (!Complete)
 479          // Still more retrieving to do
 480          return;
 481
 482       if (SigFile == "")
 483       {
 484          // There was no signature file, so we are finished.  Download
 485          // the indexes without verification.
 486          QueueIndexes(false);
 487       }
 488       else
 489       {
 490          // There was a signature file, so pass it to gpgv for
 491          // verification
 492
 493          if (_config->FindB("Debug::pkgAcquire::Auth", false))
 494             std::cerr << "Metaindex acquired, queueing gpg verification ("
 495                       << SigFile << "," << DestFile << ")\n";
 496          AuthPass = true;
 497          Desc.URI = "gpgv:" + SigFile;
 498          QueueURI(Desc);
 499          Mode = "gpgv";
 500       }
 501    }
 502 }
 503
 504 void pkgAcqMetaIndex::RetrievalDone(string Message)
 505 {
 506    // We have just finished downloading a Release file (it is not
 507    // verified yet)
 508
 509    string FileName = LookupTag(Message,"Filename");
 510    if (FileName.empty() == true)
 511    {
 512       Status = StatError;
 513       ErrorText = "Method gave a blank filename";
 514       return;
 515    }
 516
 517    if (FileName != DestFile)
 518    {
 519       Local = true;
 520       Desc.URI = "copy:" + FileName;
 521       QueueURI(Desc);
 522       return;
 523    }
 524
 525    Complete = true;
 526
 527    string FinalFile = _config->FindDir("Dir::State::lists");
 528    FinalFile += URItoFileName(RealURI);
 529
 530    // The files timestamp matches
 531    if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == false)
 532    {
 533       // Move it into position
 534       Rename(DestFile,FinalFile);
 535    }
 536    DestFile = FinalFile;
 537 }
 538
 539 void pkgAcqMetaIndex::AuthDone(string Message)
 540 {
 541    // At this point, the gpgv method has succeeded, so there is a
 542    // valid signature from a key in the trusted keyring.  We
 543    // perform additional verification of its contents, and use them
 544    // to verify the indexes we are about to download
 545
 546    if (!MetaIndexParser->Load(DestFile))
 547    {
 548       Status = StatAuthError;
 549       ErrorText = MetaIndexParser->ErrorText;
 550       return;
 551    }
 552
 553    if (!VerifyVendor())
 554    {
 555       return;
 556    }
 557
 558    if (_config->FindB("Debug::pkgAcquire::Auth", false))
 559       std::cerr << "Signature verification succeeded: "
 560                 << DestFile << std::endl;
 561
 562    // Download further indexes with verification
 563    QueueIndexes(true);
 564
 565    // Done, move signature file into position
 566
 567    string VerifiedSigFile = _config->FindDir("Dir::State::lists") +
 568       URItoFileName(RealURI) + ".gpg";
 569    Rename(SigFile,VerifiedSigFile);
 570    chmod(VerifiedSigFile.c_str(),0644);
 571 }
 572
 573 void pkgAcqMetaIndex::QueueIndexes(bool verify)
 574 {
 575    for (vector <struct IndexTarget*>::const_iterator Target = IndexTargets->begin();
 576         Target != IndexTargets->end();
 577         Target++)
 578    {
 579       string ExpectedIndexMD5;
 580       if (verify)
 581       {
 582          const indexRecords::checkSum *Record = MetaIndexParser->Lookup((*Target)->MetaKey);
 583          if (!Record)
 584          {
 585             Status = StatAuthError;
 586             ErrorText = "Unable to find expected entry  "
 587                + (*Target)->MetaKey + " in Meta-index file (malformed Release file?)";
 588             return;
 589          }
 590          ExpectedIndexMD5 = Record->MD5Hash;
 591          if (_config->FindB("Debug::pkgAcquire::Auth", false))
 592          {
 593             std::cerr << "Queueing: " << (*Target)->URI << std::endl;
 594             std::cerr << "Expected MD5: " << ExpectedIndexMD5 << std::endl;
 595          }
 596          if (ExpectedIndexMD5.empty())
 597          {
 598             Status = StatAuthError;
 599             ErrorText = "Unable to find MD5 sum for "
 600                + (*Target)->MetaKey + " in Meta-index file";
 601             return;
 602          }
 603       }
 604
 605       // Queue Packages file
 606       new pkgAcqIndex(Owner, (*Target)->URI, (*Target)->Description,
 607                       (*Target)->ShortDesc, ExpectedIndexMD5);
 608    }
 609 }
 610
 611 bool pkgAcqMetaIndex::VerifyVendor()
 612 {
 613 //    // Maybe this should be made available from above so we don't have
 614 //    // to read and parse it every time?
 615 //    pkgVendorList List;
 616 //    List.ReadMainList();
 617
 618 //    const Vendor* Vndr = NULL;
 619 //    for (std::vector<string>::const_iterator I = GPGVOutput.begin(); I != GPGVOutput.end(); I++)
 620 //    {
 621 //       string::size_type pos = (*I).find("VALIDSIG ");
 622 //       if (_config->FindB("Debug::Vendor", false))
 623 //          std::cerr << "Looking for VALIDSIG in \"" << (*I) << "\": pos " << pos
 624 //                    << std::endl;
 625 //       if (pos != std::string::npos)
 626 //       {
 627 //          string Fingerprint = (*I).substr(pos+sizeof("VALIDSIG"));
 628 //          if (_config->FindB("Debug::Vendor", false))
 629 //             std::cerr << "Looking for \"" << Fingerprint << "\" in vendor..." <<
 630 //                std::endl;
 631 //          Vndr = List.FindVendor(Fingerprint) != "";
 632 //          if (Vndr != NULL);
 633 //          break;
 634 //       }
 635 //    }
 636
 637    string Transformed = MetaIndexParser->GetExpectedDist();
 638
 639    if (Transformed == "../project/experimental")
 640    {
 641       Transformed = "experimental";
 642    }
 643
 644    string::size_type pos = Transformed.rfind('/');
 645    if (pos != string::npos)
 646    {
 647       Transformed = Transformed.substr(0, pos);
 648    }
 649
 650    if (Transformed == ".")
 651    {
 652       Transformed = "";
 653    }
 654
 655    if (_config->FindB("Debug::pkgAcquire::Auth", false))
 656    {
 657       std::cerr << "Got Codename: " << MetaIndexParser->GetDist() << std::endl;
 658       std::cerr << "Expecting Dist: " << MetaIndexParser->GetExpectedDist() << std::endl;
 659       std::cerr << "Transformed Dist: " << Transformed << std::endl;
 660    }
 661
 662    if (MetaIndexParser->CheckDist(Transformed) == false)
 663    {
 664       // This might become fatal one day
 665 //       Status = StatAuthError;
 666 //       ErrorText = "Conflicting distribution; expected "
 667 //          + MetaIndexParser->GetExpectedDist() + " but got "
 668 //          + MetaIndexParser->GetDist();
 669 //       return false;
 670       if (!Transformed.empty())
 671       {
 672          _error->Warning("Conflicting distribution: %s (expected %s but got %s)",
 673                          Desc.Description.c_str(),
 674                          Transformed.c_str(),
 675                          MetaIndexParser->GetDist().c_str());
 676       }
 677    }
 678
 679    return true;
 680 }
 681                                                                 /*}}}*/
 682 // pkgAcqMetaIndex::Failed - no Release file present or no signature
 683 //      file present                                            /*{{{*/
 684 // ---------------------------------------------------------------------
 685 /* */
 686 void pkgAcqMetaIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 687 {
 688    if (AuthPass == true)
 689    {
 690       // gpgv method failed
 691       _error->Warning("GPG error: %s: %s",
 692                       Desc.Description.c_str(),
 693                       LookupTag(Message,"Message").c_str());
 694    }
 695
 696    // No Release file was present, or verification failed, so fall
 697    // back to queueing Packages files without verification
 698    QueueIndexes(false);
 699 }
 700
 701                                                                         /*}}}*/
 702
 703 // AcqArchive::AcqArchive - Constructor                                 /*{{{*/
 704 // ---------------------------------------------------------------------
 705 /* This just sets up the initial fetch environment and queues the first
 706    possibilitiy */
 707 pkgAcqArchive::pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources,
 708                              pkgRecords *Recs,pkgCache::VerIterator const &Version,
 709                              string &StoreFilename) :
 710                Item(Owner), Version(Version), Sources(Sources), Recs(Recs),
 711                StoreFilename(StoreFilename), Vf(Version.FileList()),
 712                Trusted(false)
 713 {
 714    Retries = _config->FindI("Acquire::Retries",0);
 715
 716    if (Version.Arch() == 0)
 717    {
 718       _error->Error(_("I wasn't able to locate a file for the %s package. "
 719                       "This might mean you need to manually fix this package. "
 720                       "(due to missing arch)"),
 721                     Version.ParentPkg().Name());
 722       return;
 723    }
 724
 725    /* We need to find a filename to determine the extension. We make the
 726       assumption here that all the available sources for this version share
 727       the same extension.. */
 728    // Skip not source sources, they do not have file fields.
 729    for (; Vf.end() == false; Vf++)
 730    {
 731       if ((Vf.File()->Flags & pkgCache::Flag::NotSource) != 0)
 732          continue;
 733       break;
 734    }
 735
 736    // Does not really matter here.. we are going to fail out below
 737    if (Vf.end() != true)
 738    {
 739       // If this fails to get a file name we will bomb out below.
 740       pkgRecords::Parser &Parse = Recs->Lookup(Vf);
 741       if (_error->PendingError() == true)
 742          return;
 743
 744       // Generate the final file name as: package_version_arch.foo
 745       StoreFilename = QuoteString(Version.ParentPkg().Name(),"_:") + '_' +
 746                       QuoteString(Version.VerStr(),"_:") + '_' +
 747                       QuoteString(Version.Arch(),"_:.") +
 748                       "." + flExtension(Parse.FileName());
 749    }
 750
 751    // check if we have one trusted source for the package. if so, switch
 752    // to "TrustedOnly" mode
 753    for (pkgCache::VerFileIterator i = Version.FileList(); i.end() == false; i++)
 754    {
 755       pkgIndexFile *Index;
 756       if (Sources->FindIndex(i.File(),Index) == false)
 757          continue;
 758       if (_config->FindB("Debug::pkgAcquire::Auth", false))
 759       {
 760          std::cerr << "Checking index: " << Index->Describe()
 761                    << "(Trusted=" << Index->IsTrusted() << ")\n";
 762       }
 763       if (Index->IsTrusted()) {
 764          Trusted = true;
 765          break;
 766       }
 767    }
 768
 769    // Select a source
 770    if (QueueNext() == false && _error->PendingError() == false)
 771       _error->Error(_("I wasn't able to locate file for the %s package. "
 772                     "This might mean you need to manually fix this package."),
 773                     Version.ParentPkg().Name());
 774 }
 775                                                                         /*}}}*/
 776 // AcqArchive::QueueNext - Queue the next file source                   /*{{{*/
 777 // ---------------------------------------------------------------------
 778 /* This queues the next available file version for download. It checks if
 779    the archive is already available in the cache and stashs the MD5 for
 780    checking later. */
 781 bool pkgAcqArchive::QueueNext()
 782 {
 783    for (; Vf.end() == false; Vf++)
 784    {
 785       // Ignore not source sources
 786       if ((Vf.File()->Flags & pkgCache::Flag::NotSource) != 0)
 787          continue;
 788
 789       // Try to cross match against the source list
 790       pkgIndexFile *Index;
 791       if (Sources->FindIndex(Vf.File(),Index) == false)
 792             continue;
 793
 794       // only try to get a trusted package from another source if that source
 795       // is also trusted
 796       if(Trusted && !Index->IsTrusted())
 797          continue;
 798
 799       // Grab the text package record
 800       pkgRecords::Parser &Parse = Recs->Lookup(Vf);
 801       if (_error->PendingError() == true)
 802          return false;
 803
 804       string PkgFile = Parse.FileName();
 805       MD5 = Parse.MD5Hash();
 806       if (PkgFile.empty() == true)
 807          return _error->Error(_("The package index files are corrupted. No Filename: "
 808                               "field for package %s."),
 809                               Version.ParentPkg().Name());
 810
 811       Desc.URI = Index->ArchiveURI(PkgFile);
 812       Desc.Description = Index->ArchiveInfo(Version);
 813       Desc.Owner = this;
 814       Desc.ShortDesc = Version.ParentPkg().Name();
 815
 816       // See if we already have the file. (Legacy filenames)
 817       FileSize = Version->Size;
 818       string FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(PkgFile);
 819       struct stat Buf;
 820       if (stat(FinalFile.c_str(),&Buf) == 0)
 821       {
 822          // Make sure the size matches
 823          if ((unsigned)Buf.st_size == Version->Size)
 824          {
 825             Complete = true;
 826             Local = true;
 827             Status = StatDone;
 828             StoreFilename = DestFile = FinalFile;
 829             return true;
 830          }
 831
 832          /* Hmm, we have a file and its size does not match, this means it is
 833             an old style mismatched arch */
 834          unlink(FinalFile.c_str());
 835       }
 836
 837       // Check it again using the new style output filenames
 838       FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(StoreFilename);
 839       if (stat(FinalFile.c_str(),&Buf) == 0)
 840       {
 841          // Make sure the size matches
 842          if ((unsigned)Buf.st_size == Version->Size)
 843          {
 844             Complete = true;
 845             Local = true;
 846             Status = StatDone;
 847             StoreFilename = DestFile = FinalFile;
 848             return true;
 849          }
 850
 851          /* Hmm, we have a file and its size does not match, this shouldnt
 852             happen.. */
 853          unlink(FinalFile.c_str());
 854       }
 855
 856       DestFile = _config->FindDir("Dir::Cache::Archives") + "partial/" + flNotDir(StoreFilename);
 857
 858       // Check the destination file
 859       if (stat(DestFile.c_str(),&Buf) == 0)
 860       {
 861          // Hmm, the partial file is too big, erase it
 862          if ((unsigned)Buf.st_size > Version->Size)
 863             unlink(DestFile.c_str());
 864          else
 865             PartialSize = Buf.st_size;
 866       }
 867
 868       // Create the item
 869       Local = false;
 870       Desc.URI = Index->ArchiveURI(PkgFile);
 871       Desc.Description = Index->ArchiveInfo(Version);
 872       Desc.Owner = this;
 873       Desc.ShortDesc = Version.ParentPkg().Name();
 874       QueueURI(Desc);
 875
 876       Vf++;
 877       return true;
 878    }
 879    return false;
 880 }
 881                                                                         /*}}}*/
 882 // AcqArchive::Done - Finished fetching                                 /*{{{*/
 883 // ---------------------------------------------------------------------
 884 /* */
 885 void pkgAcqArchive::Done(string Message,unsigned long Size,string Md5Hash,
 886                          pkgAcquire::MethodConfig *Cfg)
 887 {
 888    Item::Done(Message,Size,Md5Hash,Cfg);
 889
 890    // Check the size
 891    if (Size != Version->Size)
 892    {
 893       Status = StatError;
 894       ErrorText = _("Size mismatch");
 895       return;
 896    }
 897
 898    // Check the md5
 899    if (Md5Hash.empty() == false && MD5.empty() == false)
 900    {
 901       if (Md5Hash != MD5)
 902       {
 903          Status = StatError;
 904          ErrorText = _("MD5Sum mismatch");
 905          Rename(DestFile,DestFile + ".FAILED");
 906          return;
 907       }
 908    }
 909
 910    // Grab the output filename
 911    string FileName = LookupTag(Message,"Filename");
 912    if (FileName.empty() == true)
 913    {
 914       Status = StatError;
 915       ErrorText = "Method gave a blank filename";
 916       return;
 917    }
 918
 919    Complete = true;
 920
 921    // Reference filename
 922    if (FileName != DestFile)
 923    {
 924       StoreFilename = DestFile = FileName;
 925       Local = true;
 926       return;
 927    }
 928
 929    // Done, move it into position
 930    string FinalFile = _config->FindDir("Dir::Cache::Archives");
 931    FinalFile += flNotDir(StoreFilename);
 932    Rename(DestFile,FinalFile);
 933
 934    StoreFilename = DestFile = FinalFile;
 935    Complete = true;
 936 }
 937                                                                         /*}}}*/
 938 // AcqArchive::Failed - Failure handler                                 /*{{{*/
 939 // ---------------------------------------------------------------------
 940 /* Here we try other sources */
 941 void pkgAcqArchive::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 942 {
 943    ErrorText = LookupTag(Message,"Message");
 944
 945    /* We don't really want to retry on failed media swaps, this prevents
 946       that. An interesting observation is that permanent failures are not
 947       recorded. */
 948    if (Cnf->Removable == true &&
 949        StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
 950    {
 951       // Vf = Version.FileList();
 952       while (Vf.end() == false) Vf++;
 953       StoreFilename = string();
 954       Item::Failed(Message,Cnf);
 955       return;
 956    }
 957
 958    if (QueueNext() == false)
 959    {
 960       // This is the retry counter
 961       if (Retries != 0 &&
 962           Cnf->LocalOnly == false &&
 963           StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
 964       {
 965          Retries--;
 966          Vf = Version.FileList();
 967          if (QueueNext() == true)
 968             return;
 969       }
 970
 971       StoreFilename = string();
 972       Item::Failed(Message,Cnf);
 973    }
 974 }
 975                                                                         /*}}}*/
 976 // AcqArchive::IsTrusted - Determine whether this archive comes from a
 977 // trusted source                                                       /*{{{*/
 978 // ---------------------------------------------------------------------
 979 bool pkgAcqArchive::IsTrusted()
 980 {
 981    return Trusted;
 982 }
 983
 984 // AcqArchive::Finished - Fetching has finished, tidy up                /*{{{*/
 985 // ---------------------------------------------------------------------
 986 /* */
 987 void pkgAcqArchive::Finished()
 988 {
 989    if (Status == pkgAcquire::Item::StatDone &&
 990        Complete == true)
 991       return;
 992    StoreFilename = string();
 993 }
 994                                                                         /*}}}*/
 995
 996 // AcqFile::pkgAcqFile - Constructor                                    /*{{{*/
 997 // ---------------------------------------------------------------------
 998 /* The file is added to the queue */
 999 pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string MD5,
1000                        unsigned long Size,string Dsc,string ShortDesc) :
1001                        Item(Owner), Md5Hash(MD5)
1002 {
1003    Retries = _config->FindI("Acquire::Retries",0);
1004
1005    DestFile = flNotDir(URI);
1006
1007    // Create the item
1008    Desc.URI = URI;
1009    Desc.Description = Dsc;
1010    Desc.Owner = this;
1011
1012    // Set the short description to the archive component
1013    Desc.ShortDesc = ShortDesc;
1014
1015    // Get the transfer sizes
1016    FileSize = Size;
1017    struct stat Buf;
1018    if (stat(DestFile.c_str(),&Buf) == 0)
1019    {
1020       // Hmm, the partial file is too big, erase it
1021       if ((unsigned)Buf.st_size > Size)
1022          unlink(DestFile.c_str());
1023       else
1024          PartialSize = Buf.st_size;
1025    }
1026
1027    QueueURI(Desc);
1028 }
1029                                                                         /*}}}*/
1030 // AcqFile::Done - Item downloaded OK                                   /*{{{*/
1031 // ---------------------------------------------------------------------
1032 /* */
1033 void pkgAcqFile::Done(string Message,unsigned long Size,string MD5,
1034                       pkgAcquire::MethodConfig *Cnf)
1035 {
1036    // Check the md5
1037    if (Md5Hash.empty() == false && MD5.empty() == false)
1038    {
1039       if (Md5Hash != MD5)
1040       {
1041          Status = StatError;
1042          ErrorText = "MD5Sum mismatch";
1043          Rename(DestFile,DestFile + ".FAILED");
1044          return;
1045       }
1046    }
1047
1048    Item::Done(Message,Size,MD5,Cnf);
1049
1050    string FileName = LookupTag(Message,"Filename");
1051    if (FileName.empty() == true)
1052    {
1053       Status = StatError;
1054       ErrorText = "Method gave a blank filename";
1055       return;
1056    }
1057
1058    Complete = true;
1059
1060    // The files timestamp matches
1061    if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
1062       return;
1063
1064    // We have to copy it into place
1065    if (FileName != DestFile)
1066    {
1067       Local = true;
1068       if (_config->FindB("Acquire::Source-Symlinks",true) == false ||
1069           Cnf->Removable == true)
1070       {
1071          Desc.URI = "copy:" + FileName;
1072          QueueURI(Desc);
1073          return;
1074       }
1075
1076       // Erase the file if it is a symlink so we can overwrite it
1077       struct stat St;
1078       if (lstat(DestFile.c_str(),&St) == 0)
1079       {
1080          if (S_ISLNK(St.st_mode) != 0)
1081             unlink(DestFile.c_str());
1082       }
1083
1084       // Symlink the file
1085       if (symlink(FileName.c_str(),DestFile.c_str()) != 0)
1086       {
1087          ErrorText = "Link to " + DestFile + " failure ";
1088          Status = StatError;
1089          Complete = false;
1090       }
1091    }
1092 }
1093                                                                         /*}}}*/
1094 // AcqFile::Failed - Failure handler                                    /*{{{*/
1095 // ---------------------------------------------------------------------
1096 /* Here we try other sources */
1097 void pkgAcqFile::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
1098 {
1099    ErrorText = LookupTag(Message,"Message");
1100
1101    // This is the retry counter
1102    if (Retries != 0 &&
1103        Cnf->LocalOnly == false &&
1104        StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
1105    {
1106       Retries--;
1107       QueueURI(Desc);
1108       return;
1109    }
1110
1111    Item::Failed(Message,Cnf);
1112 }
1113                                                                         /*}}}*/