apt-pkg/edsp.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 /* ######################################################################
   4    Set of methods to help writing and reading everything needed for EDSP
   5    ##################################################################### */
   6                                                                         /*}}}*/
   7 // Include Files                                                        /*{{{*/
   8 #include <apt-pkg/edsp.h>
   9 #include <apt-pkg/error.h>
  10 #include <apt-pkg/configuration.h>
  11 #include <apt-pkg/version.h>
  12 #include <apt-pkg/policy.h>
  13 #include <apt-pkg/tagfile.h>
  14
  15 #include <apti18n.h>
  16 #include <limits>
  17
  18 #include <stdio.h>
  19                                                                         /*}}}*/
  20
  21 // EDSP::WriteScenario - to the given file descriptor                   /*{{{*/
  22 bool EDSP::WriteScenario(pkgDepCache &Cache, FILE* output)
  23 {
  24    // we could use pkgCache::DepType and ::Priority, but these would be lokalized strings…
  25    const char * const PrioMap[] = {0, "important", "required", "standard",
  26                                    "optional", "extra"};
  27    const char * const DepMap[] = {"", "Depends", "PreDepends", "Suggests",
  28                                   "Recommends" , "Conflicts", "Replaces",
  29                                   "Obsoletes", "Breaks", "Enhances"};
  30
  31    for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg)
  32    {
  33       for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
  34       {
  35          fprintf(output, "Package: %s\n", Pkg.Name());
  36          fprintf(output, "Architecture: %s\n", Ver.Arch());
  37          fprintf(output, "Version: %s\n", Ver.VerStr());
  38          if (Pkg.CurrentVer() == Ver)
  39             fprintf(output, "Installed: yes\n");
  40          if (Pkg->SelectedState == pkgCache::State::Hold)
  41             fprintf(output, "Hold: yes\n");
  42          fprintf(output, "APT-ID: %u\n", Ver->ID);
  43          fprintf(output, "Priority: %s\n", PrioMap[Ver->Priority]);
  44          if ((Pkg->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
  45             fprintf(output, "Essential: yes\n");
  46          fprintf(output, "Section: %s\n", Ver.Section());
  47          if (Ver->MultiArch == pkgCache::Version::Allowed || Ver->MultiArch == pkgCache::Version::AllAllowed)
  48             fprintf(output, "Multi-Arch: allowed\n");
  49          else if (Ver->MultiArch == pkgCache::Version::Foreign || Ver->MultiArch == pkgCache::Version::AllForeign)
  50             fprintf(output, "Multi-Arch: foreign\n");
  51          else if (Ver->MultiArch == pkgCache::Version::Same)
  52             fprintf(output, "Multi-Arch: same\n");
  53          signed short Pin = std::numeric_limits<signed short>::min();
  54          for (pkgCache::VerFileIterator File = Ver.FileList(); File.end() == false; ++File) {
  55             signed short const p = Cache.GetPolicy().GetPriority(File.File());
  56             if (Pin < p)
  57                Pin = p;
  58          }
  59          fprintf(output, "APT-Pin: %d\n", Pin);
  60          if (Cache.GetCandidateVer(Pkg) == Ver)
  61             fprintf(output, "APT-Candidate: yes\n");
  62          if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
  63             fprintf(output, "APT-Automatic: yes\n");
  64          std::string dependencies[pkgCache::Dep::Enhances + 1];
  65          bool orGroup = false;
  66          for (pkgCache::DepIterator Dep = Ver.DependsList(); Dep.end() == false; ++Dep)
  67          {
  68             // Ignore implicit dependencies for multiarch here
  69             if (strcmp(Pkg.Arch(), Dep.TargetPkg().Arch()) != 0)
  70                continue;
  71             if (orGroup == false)
  72                dependencies[Dep->Type].append(", ");
  73             dependencies[Dep->Type].append(Dep.TargetPkg().Name());
  74             if (Dep->Version != 0)
  75                dependencies[Dep->Type].append(" (").append(pkgCache::CompTypeDeb(Dep->CompareOp)).append(" ").append(Dep.TargetVer()).append(")");
  76             if ((Dep->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or)
  77             {
  78                dependencies[Dep->Type].append(" | ");
  79                orGroup = true;
  80             }
  81             else
  82                orGroup = false;
  83          }
  84          for (int i = 1; i < pkgCache::Dep::Enhances + 1; ++i)
  85             if (dependencies[i].empty() == false)
  86                fprintf(output, "%s: %s\n", DepMap[i], dependencies[i].c_str()+2);
  87          string provides;
  88          for (pkgCache::PrvIterator Prv = Ver.ProvidesList(); Prv.end() == false; ++Prv)
  89          {
  90             // Ignore implicit provides for multiarch here
  91             if (strcmp(Pkg.Arch(), Prv.ParentPkg().Arch()) != 0 || strcmp(Pkg.Name(),Prv.Name()) == 0)
  92                continue;
  93             provides.append(", ").append(Prv.Name());
  94          }
  95          if (provides.empty() == false)
  96             fprintf(output, "Provides: %s\n", provides.c_str()+2);
  97
  98
  99          fprintf(output, "\n");
 100       }
 101    }
 102    return true;
 103 }
 104                                                                         /*}}}*/
 105 // EDSP::WriteRequest - to the given file descriptor                    /*{{{*/
 106 bool EDSP::WriteRequest(pkgDepCache &Cache, FILE* output, bool const Upgrade,
 107                         bool const DistUpgrade, bool const AutoRemove)
 108 {
 109    string del, inst;
 110    for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg)
 111    {
 112       string* req;
 113       if (Cache[Pkg].Delete() == true)
 114          req = &del;
 115       else if (Cache[Pkg].NewInstall() == true || Cache[Pkg].Upgrade() == true)
 116          req = &inst;
 117       else
 118          continue;
 119       req->append(" ").append(Pkg.FullName());
 120    }
 121    fprintf(output, "Request: EDSP 0.2\n");
 122    if (del.empty() == false)
 123       fprintf(output, "Remove: %s\n", del.c_str()+1);
 124    if (inst.empty() == false)
 125       fprintf(output, "Install: %s\n", inst.c_str()+1);
 126    if (Upgrade == true)
 127       fprintf(output, "Upgrade: yes\n");
 128    if (DistUpgrade == true)
 129       fprintf(output, "Dist-Upgrade: yes\n");
 130    if (AutoRemove == true)
 131       fprintf(output, "Autoremove: yes\n");
 132    if (_config->FindB("APT::Solver::Strict-Pinning", true) == false)
 133       fprintf(output, "Strict-Pinning: no\n");
 134    string solverpref("APT::Solver::");
 135    solverpref.append(_config->Find("APT::Solver::Name", "internal")).append("::Preferences");
 136    if (_config->Exists(solverpref) == true)
 137       fprintf(output, "Preferences: %s\n", _config->Find(solverpref,"").c_str());
 138    fprintf(output, "\n");
 139
 140    return true;
 141 }
 142                                                                         /*}}}*/
 143 // EDSP::ReadResponse - from the given file descriptor                  /*{{{*/
 144 bool EDSP::ReadResponse(int const input, pkgDepCache &Cache) {
 145         FileFd in;
 146         in.OpenDescriptor(input, FileFd::ReadOnly);
 147         pkgTagFile response(&in);
 148         pkgTagSection section;
 149         while (response.Step(section) == true) {
 150                 std::string type;
 151                 if (section.Exists("Install") == true)
 152                         type = "Install";
 153                 else if (section.Exists("Remove") == true)
 154                         type = "Remove";
 155                 //FIXME: handle progress
 156                 else
 157                         continue;
 158
 159                 int const id = section.FindI(type.c_str(), -1);
 160                 if (id == -1)
 161                         return _error->Error("Unable to parse %s request!", type.c_str());
 162
 163                 //FIXME: find version by id and mark it correctly
 164         }
 165         return true;
 166 }
 167                                                                         /*}}}*/
 168 // EDSP::ReadLine - first line from the given file descriptor           /*{{{*/
 169 // ---------------------------------------------------------------------
 170 /* Little helper method to read a complete line into a string. Similar to
 171    fgets but we need to use the low-level read() here as otherwise the
 172    listparser will be confused later on as mixing of fgets and read isn't
 173    a supported action according to the manpages and results are undefined */
 174 bool EDSP::ReadLine(int const input, std::string &line) {
 175         char one;
 176         ssize_t data = 0;
 177         line.erase();
 178         line.reserve(100);
 179         while ((data = read(input, &one, sizeof(one))) != -1) {
 180                 if (data != 1)
 181                         continue;
 182                 if (one == '\n')
 183                         return true;
 184                 if (one == '\r')
 185                         continue;
 186                 if (line.empty() == true && isblank(one) != 0)
 187                         continue;
 188                 line += one;
 189         }
 190         return false;
 191 }
 192                                                                         /*}}}*/
 193 // EDSP::StringToBool - convert yes/no to bool                          /*{{{*/
 194 // ---------------------------------------------------------------------
 195 /* we are not as lazy as we are in the global StringToBool as we really
 196    only accept yes/no here - but we will ignore leading spaces */
 197 bool EDSP::StringToBool(char const *answer, bool const defValue) {
 198    for (; isspace(*answer) != 0; ++answer);
 199    if (strncasecmp(answer, "yes", 3) == 0)
 200       return true;
 201    else if (strncasecmp(answer, "no", 2) == 0)
 202       return false;
 203    else
 204       _error->Warning("Value '%s' is not a boolean 'yes' or 'no'!", answer);
 205    return defValue;
 206 }
 207                                                                         /*}}}*/
 208 // EDSP::ReadRequest - first stanza from the given file descriptor      /*{{{*/
 209 bool EDSP::ReadRequest(int const input, std::list<std::string> &install,
 210                         std::list<std::string> &remove, bool &upgrade,
 211                         bool &distUpgrade, bool &autoRemove)
 212 {
 213    install.clear();
 214    remove.clear();
 215    upgrade = false;
 216    distUpgrade = false;
 217    autoRemove = false;
 218    std::string line;
 219    while (ReadLine(input, line) == true)
 220    {
 221       // Skip empty lines before request
 222       if (line.empty() == true)
 223          continue;
 224       // The first Tag must be a request, so search for it
 225       if (line.compare(0, 8, "Request:") != 0)
 226          continue;
 227
 228       while (ReadLine(input, line) == true)
 229       {
 230          // empty lines are the end of the request
 231          if (line.empty() == true)
 232             return true;
 233
 234          std::list<std::string> *request = NULL;
 235          if (line.compare(0, 8, "Install:") == 0)
 236          {
 237             line.erase(0, 8);
 238             request = &install;
 239          }
 240          else if (line.compare(0, 7, "Remove:") == 0)
 241          {
 242             line.erase(0, 7);
 243             request = &remove;
 244          }
 245          else if (line.compare(0, 8, "Upgrade:") == 0)
 246             upgrade = EDSP::StringToBool(line.c_str() + 9, false);
 247          else if (line.compare(0, 13, "Dist-Upgrade:") == 0)
 248             distUpgrade = EDSP::StringToBool(line.c_str() + 14, false);
 249          else if (line.compare(0, 11, "Autoremove:") == 0)
 250             autoRemove = EDSP::StringToBool(line.c_str() + 12, false);
 251          else
 252             _error->Warning("Unknown line in EDSP Request stanza: %s", line.c_str());
 253
 254          if (request == NULL)
 255             continue;
 256          size_t end = line.length();
 257          do {
 258             size_t begin = line.rfind(' ');
 259             if (begin == std::string::npos)
 260             {
 261                request->push_back(line.substr(0, end));
 262                break;
 263             }
 264             else if (begin < end)
 265                request->push_back(line.substr(begin + 1, end));
 266             line.erase(begin);
 267             end = line.find_last_not_of(' ');
 268          } while (end != std::string::npos);
 269       }
 270    }
 271    return false;
 272 }
 273                                                                         /*}}}*/
 274 // EDSP::ApplyRequest - first stanza from the given file descriptor     /*{{{*/
 275 bool EDSP::ApplyRequest(std::list<std::string> const &install,
 276                          std::list<std::string> const &remove,
 277                          pkgDepCache &Cache)
 278 {
 279         for (std::list<std::string>::const_iterator i = install.begin();
 280              i != install.end(); ++i)
 281                 Cache.MarkInstall(Cache.FindPkg(*i), false);
 282
 283         for (std::list<std::string>::const_iterator i = remove.begin();
 284              i != remove.end(); ++i)
 285                 Cache.MarkDelete(Cache.FindPkg(*i));
 286         return true;
 287 }
 288                                                                         /*}}}*/
 289 // EDSP::WriteSolution - to the given file descriptor                   /*{{{*/
 290 bool EDSP::WriteSolution(pkgDepCache &Cache, FILE* output)
 291 {
 292    bool const Debug = _config->FindB("Debug::EDSP::WriteSolution", false);
 293    for (pkgCache::PkgIterator Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg)
 294    {
 295       if (Cache[Pkg].Delete() == true)
 296          fprintf(output, "Remove: %d\n", Cache.GetCandidateVer(Pkg)->ID);
 297       else if (Cache[Pkg].NewInstall() == true || Cache[Pkg].Upgrade() == true)
 298          fprintf(output, "Install: %d\n", Cache.GetCandidateVer(Pkg)->ID);
 299       else
 300          continue;
 301       if (Debug == true)
 302          fprintf(output, "Package: %s\nVersion: %s\n", Pkg.FullName().c_str(), Cache.GetCandidateVer(Pkg).VerStr());
 303       fprintf(output, "\n");
 304    }
 305
 306    return true;
 307 }
 308                                                                         /*}}}*/
 309 bool EDSP::WriteError(std::string const &message, FILE* output) { return false; }