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