apt-pkg/deb/deblistparser.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: deblistparser.cc,v 1.29.2.5 2004/01/06 01:43:44 mdz Exp $
   4 /* ######################################################################
   5
   6    Package Cache Generator - Generator for the cache structure.
   7
   8    This builds the cache structure from the abstract package list parser.
   9
  10    ##################################################################### */
  11                                                                         /*}}}*/
  12 // Include Files                                                        /*{{{*/
  13 #include <config.h>
  14
  15 #include <apt-pkg/deblistparser.h>
  16 #include <apt-pkg/error.h>
  17 #include <apt-pkg/configuration.h>
  18 #include <apt-pkg/aptconfiguration.h>
  19 #include <apt-pkg/strutl.h>
  20 #include <apt-pkg/fileutl.h>
  21 #include <apt-pkg/crc-16.h>
  22 #include <apt-pkg/md5.h>
  23 #include <apt-pkg/macros.h>
  24
  25 #include <fnmatch.h>
  26 #include <ctype.h>
  27                                                                         /*}}}*/
  28
  29 using std::string;
  30
  31 static debListParser::WordList PrioList[] = {{"important",pkgCache::State::Important},
  32                        {"required",pkgCache::State::Required},
  33                        {"standard",pkgCache::State::Standard},
  34                        {"optional",pkgCache::State::Optional},
  35                        {"extra",pkgCache::State::Extra},
  36                        {}};
  37
  38 // ListParser::debListParser - Constructor                              /*{{{*/
  39 // ---------------------------------------------------------------------
  40 /* Provide an architecture and only this one and "all" will be accepted
  41    in Step(), if no Architecture is given we will accept every arch
  42    we would accept in general with checkArchitecture() */
  43 debListParser::debListParser(FileFd *File, string const &Arch) : Tags(File),
  44                                 Arch(Arch) {
  45    if (Arch == "native")
  46       this->Arch = _config->Find("APT::Architecture");
  47    Architectures = APT::Configuration::getArchitectures();
  48    MultiArchEnabled = Architectures.size() > 1;
  49 }
  50                                                                         /*}}}*/
  51 // ListParser::UniqFindTagWrite - Find the tag and write a unq string   /*{{{*/
  52 // ---------------------------------------------------------------------
  53 /* */
  54 unsigned long debListParser::UniqFindTagWrite(const char *Tag)
  55 {
  56    const char *Start;
  57    const char *Stop;
  58    if (Section.Find(Tag,Start,Stop) == false)
  59       return 0;
  60    return WriteUniqString(Start,Stop - Start);
  61 }
  62                                                                         /*}}}*/
  63 // ListParser::Package - Return the package name                        /*{{{*/
  64 // ---------------------------------------------------------------------
  65 /* This is to return the name of the package this section describes */
  66 string debListParser::Package() {
  67    string const Result = Section.FindS("Package");
  68    if(unlikely(Result.empty() == true))
  69       _error->Error("Encountered a section with no Package: header");
  70    return Result;
  71 }
  72                                                                         /*}}}*/
  73 // ListParser::Architecture - Return the package arch                   /*{{{*/
  74 // ---------------------------------------------------------------------
  75 /* This will return the Architecture of the package this section describes */
  76 string debListParser::Architecture() {
  77    return Section.FindS("Architecture");
  78 }
  79                                                                         /*}}}*/
  80 // ListParser::ArchitectureAll                                          /*{{{*/
  81 // ---------------------------------------------------------------------
  82 /* */
  83 bool debListParser::ArchitectureAll() {
  84    return Section.FindS("Architecture") == "all";
  85 }
  86                                                                         /*}}}*/
  87 // ListParser::Version - Return the version string                      /*{{{*/
  88 // ---------------------------------------------------------------------
  89 /* This is to return the string describing the version in debian form,
  90    epoch:upstream-release. If this returns the blank string then the
  91    entry is assumed to only describe package properties */
  92 string debListParser::Version()
  93 {
  94    return Section.FindS("Version");
  95 }
  96                                                                         /*}}}*/
  97 // ListParser::NewVersion - Fill in the version structure               /*{{{*/
  98 // ---------------------------------------------------------------------
  99 /* */
 100 bool debListParser::NewVersion(pkgCache::VerIterator &Ver)
 101 {
 102    // Parse the section
 103    Ver->Section = UniqFindTagWrite("Section");
 104
 105    // Parse multi-arch
 106    string const MultiArch = Section.FindS("Multi-Arch");
 107    if (MultiArch.empty() == true)
 108       Ver->MultiArch = pkgCache::Version::None;
 109    else if (MultiArch == "same") {
 110       // Parse multi-arch
 111       if (ArchitectureAll() == true)
 112       {
 113          /* Arch all packages can't be Multi-Arch: same */
 114          _error->Warning("Architecture: all package '%s' can't be Multi-Arch: same",
 115                         Section.FindS("Package").c_str());
 116          Ver->MultiArch = pkgCache::Version::None;
 117       }
 118       else
 119          Ver->MultiArch = pkgCache::Version::Same;
 120    }
 121    else if (MultiArch == "foreign")
 122       Ver->MultiArch = pkgCache::Version::Foreign;
 123    else if (MultiArch == "allowed")
 124       Ver->MultiArch = pkgCache::Version::Allowed;
 125    else
 126    {
 127       _error->Warning("Unknown Multi-Arch type '%s' for package '%s'",
 128                         MultiArch.c_str(), Section.FindS("Package").c_str());
 129       Ver->MultiArch = pkgCache::Version::None;
 130    }
 131
 132    if (ArchitectureAll() == true)
 133       Ver->MultiArch |= pkgCache::Version::All;
 134
 135    // Archive Size
 136    Ver->Size = Section.FindULL("Size");
 137    // Unpacked Size (in K)
 138    Ver->InstalledSize = Section.FindULL("Installed-Size");
 139    Ver->InstalledSize *= 1024;
 140
 141    // Priority
 142    const char *Start;
 143    const char *Stop;
 144    if (Section.Find("Priority",Start,Stop) == true)
 145    {
 146       if (GrabWord(string(Start,Stop-Start),PrioList,Ver->Priority) == false)
 147          Ver->Priority = pkgCache::State::Extra;
 148    }
 149
 150    if (ParseDepends(Ver,"Depends",pkgCache::Dep::Depends) == false)
 151       return false;
 152    if (ParseDepends(Ver,"Pre-Depends",pkgCache::Dep::PreDepends) == false)
 153       return false;
 154    if (ParseDepends(Ver,"Suggests",pkgCache::Dep::Suggests) == false)
 155       return false;
 156    if (ParseDepends(Ver,"Recommends",pkgCache::Dep::Recommends) == false)
 157       return false;
 158    if (ParseDepends(Ver,"Conflicts",pkgCache::Dep::Conflicts) == false)
 159       return false;
 160    if (ParseDepends(Ver,"Breaks",pkgCache::Dep::DpkgBreaks) == false)
 161       return false;
 162    if (ParseDepends(Ver,"Replaces",pkgCache::Dep::Replaces) == false)
 163       return false;
 164    if (ParseDepends(Ver,"Enhances",pkgCache::Dep::Enhances) == false)
 165       return false;
 166
 167    // Obsolete.
 168    if (ParseDepends(Ver,"Optional",pkgCache::Dep::Suggests) == false)
 169       return false;
 170
 171    if (ParseProvides(Ver) == false)
 172       return false;
 173
 174    return true;
 175 }
 176                                                                         /*}}}*/
 177 // ListParser::Description - Return the description string              /*{{{*/
 178 // ---------------------------------------------------------------------
 179 /* This is to return the string describing the package in debian
 180    form. If this returns the blank string then the entry is assumed to
 181    only describe package properties */
 182 string debListParser::Description()
 183 {
 184    string const lang = DescriptionLanguage();
 185    if (lang.empty())
 186       return Section.FindS("Description");
 187    else
 188       return Section.FindS(string("Description-").append(lang).c_str());
 189 }
 190                                                                         /*}}}*/
 191 // ListParser::DescriptionLanguage - Return the description lang string /*{{{*/
 192 // ---------------------------------------------------------------------
 193 /* This is to return the string describing the language of
 194    description. If this returns the blank string then the entry is
 195    assumed to describe original description. */
 196 string debListParser::DescriptionLanguage()
 197 {
 198    if (Section.FindS("Description").empty() == false)
 199       return "";
 200
 201    std::vector<string> const lang = APT::Configuration::getLanguages(true);
 202    for (std::vector<string>::const_iterator l = lang.begin();
 203         l != lang.end(); ++l)
 204       if (Section.FindS(string("Description-").append(*l).c_str()).empty() == false)
 205          return *l;
 206
 207    return "";
 208 }
 209                                                                         /*}}}*/
 210 // ListParser::Description - Return the description_md5 MD5SumValue     /*{{{*/
 211 // ---------------------------------------------------------------------
 212 /* This is to return the md5 string to allow the check if it is the right
 213    description. If no Description-md5 is found in the section it will be
 214    calculated.
 215  */
 216 MD5SumValue debListParser::Description_md5()
 217 {
 218    string const value = Section.FindS("Description-md5");
 219    if (value.empty() == true)
 220    {
 221       MD5Summation md5;
 222       md5.Add((Description() + "\n").c_str());
 223       return md5.Result();
 224    }
 225    else if (likely(value.size() == 32))
 226    {
 227       if (likely(value.find_first_not_of("0123456789abcdefABCDEF") == string::npos))
 228          return MD5SumValue(value);
 229       _error->Error("Malformed Description-md5 line; includes invalid character '%s'", value.c_str());
 230       return MD5SumValue();
 231    }
 232    _error->Error("Malformed Description-md5 line; doesn't have the required length (32 != %d) '%s'", (int)value.size(), value.c_str());
 233    return MD5SumValue();
 234 }
 235                                                                         /*}}}*/
 236 // ListParser::UsePackage - Update a package structure                  /*{{{*/
 237 // ---------------------------------------------------------------------
 238 /* This is called to update the package with any new information
 239    that might be found in the section */
 240 bool debListParser::UsePackage(pkgCache::PkgIterator &Pkg,
 241                                pkgCache::VerIterator &Ver)
 242 {
 243    if (Pkg->Section == 0)
 244       Pkg->Section = UniqFindTagWrite("Section");
 245
 246    string const static myArch = _config->Find("APT::Architecture");
 247    // Possible values are: "all", "native", "installed" and "none"
 248    // The "installed" mode is handled by ParseStatus(), See #544481 and friends.
 249    string const static essential = _config->Find("pkgCacheGen::Essential", "all");
 250    if (essential == "all" ||
 251        (essential == "native" && Pkg->Arch != 0 && myArch == Pkg.Arch()))
 252       if (Section.FindFlag("Essential",Pkg->Flags,pkgCache::Flag::Essential) == false)
 253          return false;
 254    if (Section.FindFlag("Important",Pkg->Flags,pkgCache::Flag::Important) == false)
 255       return false;
 256
 257    if (strcmp(Pkg.Name(),"apt") == 0)
 258    {
 259       if ((essential == "native" && Pkg->Arch != 0 && myArch == Pkg.Arch()) ||
 260           essential == "all")
 261          Pkg->Flags |= pkgCache::Flag::Essential | pkgCache::Flag::Important;
 262       else
 263          Pkg->Flags |= pkgCache::Flag::Important;
 264    }
 265
 266    if (ParseStatus(Pkg,Ver) == false)
 267       return false;
 268    return true;
 269 }
 270                                                                         /*}}}*/
 271 // ListParser::VersionHash - Compute a unique hash for this version     /*{{{*/
 272 // ---------------------------------------------------------------------
 273 /* */
 274 unsigned short debListParser::VersionHash()
 275 {
 276    const char *Sections[] ={"Installed-Size",
 277                             "Depends",
 278                             "Pre-Depends",
 279 //                            "Suggests",
 280 //                            "Recommends",
 281                             "Conflicts",
 282                             "Breaks",
 283                             "Replaces",0};
 284    unsigned long Result = INIT_FCS;
 285    char S[1024];
 286    for (const char **I = Sections; *I != 0; I++)
 287    {
 288       const char *Start;
 289       const char *End;
 290       if (Section.Find(*I,Start,End) == false || End - Start >= (signed)sizeof(S))
 291          continue;
 292
 293       /* Strip out any spaces from the text, this undoes dpkgs reformatting
 294          of certain fields. dpkg also has the rather interesting notion of
 295          reformatting depends operators < -> <= */
 296       char *J = S;
 297       for (; Start != End; Start++)
 298       {
 299          if (isspace(*Start) == 0)
 300             *J++ = tolower_ascii(*Start);
 301          if (*Start == '<' && Start[1] != '<' && Start[1] != '=')
 302             *J++ = '=';
 303          if (*Start == '>' && Start[1] != '>' && Start[1] != '=')
 304             *J++ = '=';
 305       }
 306
 307       Result = AddCRC16(Result,S,J - S);
 308    }
 309
 310    return Result;
 311 }
 312                                                                         /*}}}*/
 313 // ListParser::ParseStatus - Parse the status field                     /*{{{*/
 314 // ---------------------------------------------------------------------
 315 /* Status lines are of the form,
 316      Status: want flag status
 317    want = unknown, install, hold, deinstall, purge
 318    flag = ok, reinstreq, hold, hold-reinstreq
 319    status = not-installed, unpacked, half-configured,
 320             half-installed, config-files, post-inst-failed,
 321             removal-failed, installed
 322
 323    Some of the above are obsolete (I think?) flag = hold-* and
 324    status = post-inst-failed, removal-failed at least.
 325  */
 326 bool debListParser::ParseStatus(pkgCache::PkgIterator &Pkg,
 327                                 pkgCache::VerIterator &Ver)
 328 {
 329    const char *Start;
 330    const char *Stop;
 331    if (Section.Find("Status",Start,Stop) == false)
 332       return true;
 333
 334    // UsePackage() is responsible for setting the flag in the default case
 335    bool const static essential = _config->Find("pkgCacheGen::Essential", "") == "installed";
 336    if (essential == true &&
 337        Section.FindFlag("Essential",Pkg->Flags,pkgCache::Flag::Essential) == false)
 338       return false;
 339
 340    // Isolate the first word
 341    const char *I = Start;
 342    for(; I < Stop && *I != ' '; I++);
 343    if (I >= Stop || *I != ' ')
 344       return _error->Error("Malformed Status line");
 345
 346    // Process the want field
 347    WordList WantList[] = {{"unknown",pkgCache::State::Unknown},
 348                           {"install",pkgCache::State::Install},
 349                           {"hold",pkgCache::State::Hold},
 350                           {"deinstall",pkgCache::State::DeInstall},
 351                           {"purge",pkgCache::State::Purge},
 352                           {}};
 353    if (GrabWord(string(Start,I-Start),WantList,Pkg->SelectedState) == false)
 354       return _error->Error("Malformed 1st word in the Status line");
 355
 356    // Isloate the next word
 357    I++;
 358    Start = I;
 359    for(; I < Stop && *I != ' '; I++);
 360    if (I >= Stop || *I != ' ')
 361       return _error->Error("Malformed status line, no 2nd word");
 362
 363    // Process the flag field
 364    WordList FlagList[] = {{"ok",pkgCache::State::Ok},
 365                           {"reinstreq",pkgCache::State::ReInstReq},
 366                           {"hold",pkgCache::State::HoldInst},
 367                           {"hold-reinstreq",pkgCache::State::HoldReInstReq},
 368                           {}};
 369    if (GrabWord(string(Start,I-Start),FlagList,Pkg->InstState) == false)
 370       return _error->Error("Malformed 2nd word in the Status line");
 371
 372    // Isloate the last word
 373    I++;
 374    Start = I;
 375    for(; I < Stop && *I != ' '; I++);
 376    if (I != Stop)
 377       return _error->Error("Malformed Status line, no 3rd word");
 378
 379    // Process the flag field
 380    WordList StatusList[] = {{"not-installed",pkgCache::State::NotInstalled},
 381                             {"unpacked",pkgCache::State::UnPacked},
 382                             {"half-configured",pkgCache::State::HalfConfigured},
 383                             {"installed",pkgCache::State::Installed},
 384                             {"half-installed",pkgCache::State::HalfInstalled},
 385                             {"config-files",pkgCache::State::ConfigFiles},
 386                             {"triggers-awaited",pkgCache::State::TriggersAwaited},
 387                             {"triggers-pending",pkgCache::State::TriggersPending},
 388                             {"post-inst-failed",pkgCache::State::HalfConfigured},
 389                             {"removal-failed",pkgCache::State::HalfInstalled},
 390                             {}};
 391    if (GrabWord(string(Start,I-Start),StatusList,Pkg->CurrentState) == false)
 392       return _error->Error("Malformed 3rd word in the Status line");
 393
 394    /* A Status line marks the package as indicating the current
 395       version as well. Only if it is actually installed.. Otherwise
 396       the interesting dpkg handling of the status file creates bogus
 397       entries. */
 398    if (!(Pkg->CurrentState == pkgCache::State::NotInstalled ||
 399          Pkg->CurrentState == pkgCache::State::ConfigFiles))
 400    {
 401       if (Ver.end() == true)
 402          _error->Warning("Encountered status field in a non-version description");
 403       else
 404          Pkg->CurrentVer = Ver.Index();
 405    }
 406
 407    return true;
 408 }
 409
 410 const char *debListParser::ConvertRelation(const char *I,unsigned int &Op)
 411 {
 412    // Determine the operator
 413    switch (*I)
 414    {
 415       case '<':
 416       I++;
 417       if (*I == '=')
 418       {
 419          I++;
 420          Op = pkgCache::Dep::LessEq;
 421          break;
 422       }
 423
 424       if (*I == '<')
 425       {
 426          I++;
 427          Op = pkgCache::Dep::Less;
 428          break;
 429       }
 430
 431       // < is the same as <= and << is really Cs < for some reason
 432       Op = pkgCache::Dep::LessEq;
 433       break;
 434
 435       case '>':
 436       I++;
 437       if (*I == '=')
 438       {
 439          I++;
 440          Op = pkgCache::Dep::GreaterEq;
 441          break;
 442       }
 443
 444       if (*I == '>')
 445       {
 446          I++;
 447          Op = pkgCache::Dep::Greater;
 448          break;
 449       }
 450
 451       // > is the same as >= and >> is really Cs > for some reason
 452       Op = pkgCache::Dep::GreaterEq;
 453       break;
 454
 455       case '=':
 456       Op = pkgCache::Dep::Equals;
 457       I++;
 458       break;
 459
 460       // HACK around bad package definitions
 461       default:
 462       Op = pkgCache::Dep::Equals;
 463       break;
 464    }
 465    return I;
 466 }
 467
 468 /*
 469  * CompleteArch:
 470  *
 471  * The complete architecture, consisting of <kernel>-<cpu>.
 472  */
 473 static string CompleteArch(std::string const &arch) {
 474     if (arch == "armel")              return "linux-arm";
 475     if (arch == "armhf")              return "linux-arm";
 476     if (arch == "lpia")               return "linux-i386";
 477     if (arch == "powerpcspe")         return "linux-powerpc";
 478     if (arch == "uclibc-linux-armel") return "linux-arm";
 479     if (arch == "uclinux-armel")      return "uclinux-arm";
 480
 481     return (arch.find("-") != string::npos) ? arch : "linux-" + arch;
 482 }
 483                                                                         /*}}}*/
 484 // ListParser::ParseDepends - Parse a dependency element                /*{{{*/
 485 // ---------------------------------------------------------------------
 486 /* This parses the dependency elements out of a standard string in place,
 487    bit by bit. */
 488 const char *debListParser::ParseDepends(const char *Start,const char *Stop,
 489                                         string &Package,string &Ver,
 490                                         unsigned int &Op, bool const &ParseArchFlags,
 491                                         bool const &StripMultiArch)
 492 {
 493    // Strip off leading space
 494    for (;Start != Stop && isspace(*Start) != 0; Start++);
 495
 496    // Parse off the package name
 497    const char *I = Start;
 498    for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
 499         *I != ',' && *I != '|' && *I != '[' && *I != ']'; I++);
 500
 501    // Malformed, no '('
 502    if (I != Stop && *I == ')')
 503       return 0;
 504
 505    if (I == Start)
 506       return 0;
 507
 508    // Stash the package name
 509    Package.assign(Start,I - Start);
 510
 511    // We don't want to confuse library users which can't handle MultiArch
 512    string const arch = _config->Find("APT::Architecture");
 513    if (StripMultiArch == true) {
 514       size_t const found = Package.rfind(':');
 515       if (found != string::npos &&
 516           (strcmp(Package.c_str() + found, ":any") == 0 ||
 517            strcmp(Package.c_str() + found, ":native") == 0 ||
 518            strcmp(Package.c_str() + found + 1, arch.c_str()) == 0))
 519          Package = Package.substr(0,found);
 520    }
 521
 522    // Skip white space to the '('
 523    for (;I != Stop && isspace(*I) != 0 ; I++);
 524
 525    // Parse a version
 526    if (I != Stop && *I == '(')
 527    {
 528       // Skip the '('
 529       for (I++; I != Stop && isspace(*I) != 0 ; I++);
 530       if (I + 3 >= Stop)
 531          return 0;
 532       I = ConvertRelation(I,Op);
 533
 534       // Skip whitespace
 535       for (;I != Stop && isspace(*I) != 0; I++);
 536       Start = I;
 537       I = (const char*) memchr(I, ')', Stop - I);
 538       if (I == NULL || Start == I)
 539          return 0;
 540
 541       // Skip trailing whitespace
 542       const char *End = I;
 543       for (; End > Start && isspace(End[-1]); End--);
 544
 545       Ver.assign(Start,End-Start);
 546       I++;
 547    }
 548    else
 549    {
 550       Ver.clear();
 551       Op = pkgCache::Dep::NoOp;
 552    }
 553
 554    // Skip whitespace
 555    for (;I != Stop && isspace(*I) != 0; I++);
 556
 557    if (ParseArchFlags == true)
 558    {
 559       string completeArch = CompleteArch(arch);
 560
 561       // Parse an architecture
 562       if (I != Stop && *I == '[')
 563       {
 564          // malformed
 565          I++;
 566          if (I == Stop)
 567             return 0;
 568
 569          const char *End = I;
 570          bool Found = false;
 571          bool NegArch = false;
 572          while (I != Stop)
 573          {
 574             // look for whitespace or ending ']'
 575             while (End != Stop && !isspace(*End) && *End != ']')
 576                End++;
 577
 578             if (End == Stop)
 579                return 0;
 580
 581             if (*I == '!')
 582             {
 583                NegArch = true;
 584                I++;
 585             }
 586
 587             if (stringcmp(arch,I,End) == 0) {
 588                Found = true;
 589             } else {
 590                std::string wildcard = SubstVar(string(I, End), "any", "*");
 591                if (fnmatch(wildcard.c_str(), completeArch.c_str(), 0) == 0)
 592                   Found = true;
 593             }
 594
 595             if (*End++ == ']') {
 596                I = End;
 597                break;
 598             }
 599
 600             I = End;
 601             for (;I != Stop && isspace(*I) != 0; I++);
 602          }
 603
 604          if (NegArch)
 605             Found = !Found;
 606
 607          if (Found == false)
 608             Package = ""; /* not for this arch */
 609       }
 610
 611       // Skip whitespace
 612       for (;I != Stop && isspace(*I) != 0; I++);
 613    }
 614
 615    if (I != Stop && *I == '|')
 616       Op |= pkgCache::Dep::Or;
 617
 618    if (I == Stop || *I == ',' || *I == '|')
 619    {
 620       if (I != Stop)
 621          for (I++; I != Stop && isspace(*I) != 0; I++);
 622       return I;
 623    }
 624
 625    return 0;
 626 }
 627                                                                         /*}}}*/
 628 // ListParser::ParseDepends - Parse a dependency list                   /*{{{*/
 629 // ---------------------------------------------------------------------
 630 /* This is the higher level depends parser. It takes a tag and generates
 631    a complete depends tree for the given version. */
 632 bool debListParser::ParseDepends(pkgCache::VerIterator &Ver,
 633                                  const char *Tag,unsigned int Type)
 634 {
 635    const char *Start;
 636    const char *Stop;
 637    if (Section.Find(Tag,Start,Stop) == false)
 638       return true;
 639
 640    string const pkgArch = Ver.Arch();
 641
 642    while (1)
 643    {
 644       string Package;
 645       string Version;
 646       unsigned int Op;
 647
 648       Start = ParseDepends(Start,Stop,Package,Version,Op,false,!MultiArchEnabled);
 649       if (Start == 0)
 650          return _error->Error("Problem parsing dependency %s",Tag);
 651       size_t const found = Package.rfind(':');
 652
 653       if (MultiArchEnabled == true &&
 654           (Type == pkgCache::Dep::Conflicts ||
 655            Type == pkgCache::Dep::DpkgBreaks ||
 656            Type == pkgCache::Dep::Replaces))
 657       {
 658          for (std::vector<std::string>::const_iterator a = Architectures.begin();
 659               a != Architectures.end(); ++a)
 660             if (NewDepends(Ver,Package,*a,Version,Op,Type) == false)
 661                return false;
 662       }
 663       else if (MultiArchEnabled == true && found != string::npos &&
 664                strcmp(Package.c_str() + found, ":any") != 0)
 665       {
 666          string Arch = Package.substr(found+1, string::npos);
 667          Package = Package.substr(0, found);
 668          // Such dependencies are not supposed to be accepted …
 669          // … but this is probably the best thing to do.
 670          if (Arch == "native")
 671             Arch = _config->Find("APT::Architecture");
 672          if (NewDepends(Ver,Package,Arch,Version,Op,Type) == false)
 673             return false;
 674       }
 675       else if (NewDepends(Ver,Package,pkgArch,Version,Op,Type) == false)
 676          return false;
 677       if (Start == Stop)
 678          break;
 679    }
 680    return true;
 681 }
 682                                                                         /*}}}*/
 683 // ListParser::ParseProvides - Parse the provides list                  /*{{{*/
 684 // ---------------------------------------------------------------------
 685 /* */
 686 bool debListParser::ParseProvides(pkgCache::VerIterator &Ver)
 687 {
 688    const char *Start;
 689    const char *Stop;
 690    if (Section.Find("Provides",Start,Stop) == true)
 691    {
 692       string Package;
 693       string Version;
 694       string const Arch = Ver.Arch();
 695       unsigned int Op;
 696
 697       while (1)
 698       {
 699          Start = ParseDepends(Start,Stop,Package,Version,Op);
 700          if (Start == 0)
 701             return _error->Error("Problem parsing Provides line");
 702          if (Op != pkgCache::Dep::NoOp) {
 703             _error->Warning("Ignoring Provides line with DepCompareOp for package %s", Package.c_str());
 704          } else if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign) {
 705             if (NewProvidesAllArch(Ver, Package, Version) == false)
 706                return false;
 707          } else {
 708             if (NewProvides(Ver, Package, Arch, Version) == false)
 709                return false;
 710          }
 711
 712          if (Start == Stop)
 713             break;
 714       }
 715    }
 716
 717    if (MultiArchEnabled == false)
 718       return true;
 719    else if ((Ver->MultiArch & pkgCache::Version::Allowed) == pkgCache::Version::Allowed)
 720    {
 721       string const Package = string(Ver.ParentPkg().Name()).append(":").append("any");
 722       return NewProvidesAllArch(Ver, Package, Ver.VerStr());
 723    }
 724    else if ((Ver->MultiArch & pkgCache::Version::Foreign) == pkgCache::Version::Foreign)
 725       return NewProvidesAllArch(Ver, Ver.ParentPkg().Name(), Ver.VerStr());
 726
 727    return true;
 728 }
 729                                                                         /*}}}*/
 730 // ListParser::NewProvides - add provides for all architectures         /*{{{*/
 731 bool debListParser::NewProvidesAllArch(pkgCache::VerIterator &Ver, string const &Package,
 732                                 string const &Version) {
 733    for (std::vector<string>::const_iterator a = Architectures.begin();
 734         a != Architectures.end(); ++a)
 735    {
 736       if (NewProvides(Ver, Package, *a, Version) == false)
 737          return false;
 738    }
 739    return true;
 740 }
 741                                                                         /*}}}*/
 742 // ListParser::GrabWord - Matches a word and returns                    /*{{{*/
 743 // ---------------------------------------------------------------------
 744 /* Looks for a word in a list of words - for ParseStatus */
 745 bool debListParser::GrabWord(string Word,WordList *List,unsigned char &Out)
 746 {
 747    for (unsigned int C = 0; List[C].Str != 0; C++)
 748    {
 749       if (strcasecmp(Word.c_str(),List[C].Str) == 0)
 750       {
 751          Out = List[C].Val;
 752          return true;
 753       }
 754    }
 755    return false;
 756 }
 757                                                                         /*}}}*/
 758 // ListParser::Step - Move to the next section in the file              /*{{{*/
 759 // ---------------------------------------------------------------------
 760 /* This has to be carefull to only process the correct architecture */
 761 bool debListParser::Step()
 762 {
 763    iOffset = Tags.Offset();
 764    while (Tags.Step(Section) == true)
 765    {
 766       /* See if this is the correct Architecture, if it isn't then we
 767          drop the whole section. A missing arch tag only happens (in theory)
 768          inside the Status file, so that is a positive return */
 769       string const Architecture = Section.FindS("Architecture");
 770       if (Architecture.empty() == true)
 771          return true;
 772
 773       if (Arch.empty() == true || Arch == "any" || MultiArchEnabled == false)
 774       {
 775          if (APT::Configuration::checkArchitecture(Architecture) == true)
 776             return true;
 777       }
 778       else
 779       {
 780          if (Architecture == Arch)
 781             return true;
 782
 783          if (Architecture == "all" && Arch == _config->Find("APT::Architecture"))
 784             return true;
 785       }
 786
 787       iOffset = Tags.Offset();
 788    }
 789    return false;
 790 }
 791                                                                         /*}}}*/
 792 // ListParser::LoadReleaseInfo - Load the release information           /*{{{*/
 793 // ---------------------------------------------------------------------
 794 /* */
 795 bool debListParser::LoadReleaseInfo(pkgCache::PkgFileIterator &FileI,
 796                                     FileFd &File, string component)
 797 {
 798    // apt-secure does no longer download individual (per-section) Release
 799    // file. to provide Component pinning we use the section name now
 800    FileI->Component = WriteUniqString(component);
 801
 802    // FIXME: Code depends on the fact that Release files aren't compressed
 803    FILE* release = fdopen(dup(File.Fd()), "r");
 804    if (release == NULL)
 805       return false;
 806
 807    char buffer[101];
 808    bool gpgClose = false;
 809    while (fgets(buffer, sizeof(buffer), release) != NULL)
 810    {
 811       size_t len = 0;
 812
 813       // Skip empty lines
 814       for (; buffer[len] == '\r' && buffer[len] == '\n'; ++len)
 815          /* nothing */
 816          ;
 817       if (buffer[len] == '\0')
 818          continue;
 819
 820       // only evalute the first GPG section
 821       if (strncmp("-----", buffer, 5) == 0)
 822       {
 823          if (gpgClose == true)
 824             break;
 825          gpgClose = true;
 826          continue;
 827       }
 828
 829       // seperate the tag from the data
 830       const char* dataStart = strchr(buffer + len, ':');
 831       if (dataStart == NULL)
 832          continue;
 833       len = dataStart - buffer;
 834       for (++dataStart; *dataStart == ' '; ++dataStart)
 835          /* nothing */
 836          ;
 837       const char* dataEnd = (const char*)rawmemchr(dataStart, '\0');
 838       // The last char should be a newline, but we can never be sure: #633350
 839       const char* lineEnd = dataEnd;
 840       for (--lineEnd; *lineEnd == '\r' || *lineEnd == '\n'; --lineEnd)
 841          /* nothing */
 842          ;
 843       ++lineEnd;
 844
 845       // which datastorage need to be updated
 846       enum { Suite, Component, Version, Origin, Codename, Label, None } writeTo = None;
 847       if (buffer[0] == ' ')
 848          ;
 849       #define APT_PARSER_WRITETO(X) else if (strncmp(#X, buffer, len) == 0) writeTo = X;
 850       APT_PARSER_WRITETO(Suite)
 851       APT_PARSER_WRITETO(Component)
 852       APT_PARSER_WRITETO(Version)
 853       APT_PARSER_WRITETO(Origin)
 854       APT_PARSER_WRITETO(Codename)
 855       APT_PARSER_WRITETO(Label)
 856       #undef APT_PARSER_WRITETO
 857       #define APT_PARSER_FLAGIT(X) else if (strncmp(#X, buffer, len) == 0) \
 858          pkgTagSection::FindFlag(FileI->Flags, pkgCache::Flag:: X, dataStart, lineEnd);
 859       APT_PARSER_FLAGIT(NotAutomatic)
 860       APT_PARSER_FLAGIT(ButAutomaticUpgrades)
 861       #undef APT_PARSER_FLAGIT
 862
 863       // load all data from the line and save it
 864       string data;
 865       if (writeTo != None)
 866          data.append(dataStart, dataEnd);
 867       if (sizeof(buffer) - 1 == (dataEnd - buffer))
 868       {
 869          while (fgets(buffer, sizeof(buffer), release) != NULL)
 870          {
 871             if (writeTo != None)
 872                data.append(buffer);
 873             if (strlen(buffer) != sizeof(buffer) - 1)
 874                break;
 875          }
 876       }
 877       if (writeTo != None)
 878       {
 879          // remove spaces and stuff from the end of the data line
 880          for (std::string::reverse_iterator s = data.rbegin();
 881               s != data.rend(); ++s)
 882          {
 883             if (*s != '\r' && *s != '\n' && *s != ' ')
 884                break;
 885             *s = '\0';
 886          }
 887          switch (writeTo) {
 888          case Suite: FileI->Archive = WriteUniqString(data); break;
 889          case Component: FileI->Component = WriteUniqString(data); break;
 890          case Version: FileI->Version = WriteUniqString(data); break;
 891          case Origin: FileI->Origin = WriteUniqString(data); break;
 892          case Codename: FileI->Codename = WriteUniqString(data); break;
 893          case Label: FileI->Label = WriteUniqString(data); break;
 894          case None: break;
 895          }
 896       }
 897    }
 898    fclose(release);
 899
 900    return !_error->PendingError();
 901 }
 902                                                                         /*}}}*/
 903 // ListParser::GetPrio - Convert the priority from a string             /*{{{*/
 904 // ---------------------------------------------------------------------
 905 /* */
 906 unsigned char debListParser::GetPrio(string Str)
 907 {
 908    unsigned char Out;
 909    if (GrabWord(Str,PrioList,Out) == false)
 910       Out = pkgCache::State::Extra;
 911
 912    return Out;
 913 }
 914                                                                         /*}}}*/