diff options
Diffstat (limited to 'apt-pkg/edsp')
-rw-r--r-- | apt-pkg/edsp/edspindexfile.cc | 128 | ||||
-rw-r--r-- | apt-pkg/edsp/edspindexfile.h | 62 | ||||
-rw-r--r-- | apt-pkg/edsp/edsplistparser.cc | 186 | ||||
-rw-r--r-- | apt-pkg/edsp/edsplistparser.h | 67 | ||||
-rw-r--r-- | apt-pkg/edsp/edspsystem.cc | 167 | ||||
-rw-r--r-- | apt-pkg/edsp/edspsystem.h | 69 |
6 files changed, 679 insertions, 0 deletions
diff --git a/apt-pkg/edsp/edspindexfile.cc b/apt-pkg/edsp/edspindexfile.cc new file mode 100644 index 000000000..042a88cf9 --- /dev/null +++ b/apt-pkg/edsp/edspindexfile.cc @@ -0,0 +1,128 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + The scenario file is designed to work as an intermediate file between + APT and the resolver. Its on propose very similar to a dpkg status file + ##################################################################### */ + /*}}}*/ +// Include Files /*{{{*/ +#include <config.h> + +#include <apt-pkg/edspindexfile.h> +#include <apt-pkg/edsplistparser.h> +#include <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/indexfile.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/pkgrecords.h> + +#include <stddef.h> +#include <unistd.h> +#include <string> + /*}}}*/ + +// EDSP-like Index /*{{{*/ +edspLikeIndex::edspLikeIndex(std::string const &File) : pkgDebianIndexRealFile(File, true) +{ +} +std::string edspLikeIndex::GetArchitecture() const +{ + return std::string(); +} +bool edspLikeIndex::HasPackages() const +{ + return true; +} +bool edspLikeIndex::Exists() const +{ + return true; +} +uint8_t edspLikeIndex::GetIndexFlags() const +{ + return 0; +} +bool edspLikeIndex::OpenListFile(FileFd &Pkg, std::string const &FileName) +{ + if (FileName.empty() == false && FileName != "/nonexistent/stdin") + return pkgDebianIndexRealFile::OpenListFile(Pkg, FileName); + if (Pkg.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false) + return _error->Error("Problem opening %s",FileName.c_str()); + return true; +} + /*}}}*/ +// EDSP Index /*{{{*/ +edspIndex::edspIndex(std::string const &File) : edspLikeIndex(File) +{ +} +std::string edspIndex::GetComponent() const +{ + return "edsp"; +} +pkgCacheListParser * edspIndex::CreateListParser(FileFd &Pkg) +{ + if (Pkg.IsOpen() == false) + return NULL; + _error->PushToStack(); + pkgCacheListParser * const Parser = new edspListParser(&Pkg); + bool const newError = _error->PendingError(); + _error->MergeWithStack(); + return newError ? NULL : Parser; +} + /*}}}*/ +// EIPP Index /*{{{*/ +eippIndex::eippIndex(std::string const &File) : edspLikeIndex(File) +{ +} +std::string eippIndex::GetComponent() const +{ + return "eipp"; +} +pkgCacheListParser * eippIndex::CreateListParser(FileFd &Pkg) +{ + if (Pkg.IsOpen() == false) + return NULL; + _error->PushToStack(); + pkgCacheListParser * const Parser = new eippListParser(&Pkg); + bool const newError = _error->PendingError(); + _error->MergeWithStack(); + return newError ? NULL : Parser; +} + /*}}}*/ + +// Index File types for APT /*{{{*/ +class APT_HIDDEN edspIFType: public pkgIndexFile::Type +{ + public: + virtual pkgRecords::Parser *CreatePkgParser(pkgCache::PkgFileIterator const &) const APT_OVERRIDE + { + // we don't have a record parser for this type as the file is not presistent + return NULL; + }; + edspIFType() {Label = "EDSP scenario file";}; +}; +APT_HIDDEN edspIFType _apt_Edsp; +const pkgIndexFile::Type *edspIndex::GetType() const +{ + return &_apt_Edsp; +} + +class APT_HIDDEN eippIFType: public pkgIndexFile::Type +{ + public: + virtual pkgRecords::Parser *CreatePkgParser(pkgCache::PkgFileIterator const &) const APT_OVERRIDE + { + // we don't have a record parser for this type as the file is not presistent + return NULL; + }; + eippIFType() {Label = "EIPP scenario file";}; +}; +APT_HIDDEN eippIFType _apt_Eipp; +const pkgIndexFile::Type *eippIndex::GetType() const +{ + return &_apt_Eipp; +} + /*}}}*/ + +edspLikeIndex::~edspLikeIndex() {} +edspIndex::~edspIndex() {} +eippIndex::~eippIndex() {} diff --git a/apt-pkg/edsp/edspindexfile.h b/apt-pkg/edsp/edspindexfile.h new file mode 100644 index 000000000..e146ca80c --- /dev/null +++ b/apt-pkg/edsp/edspindexfile.h @@ -0,0 +1,62 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + The scenario file is designed to work as an intermediate file between + APT and the resolver. Its on propose very similar to a dpkg status file + ##################################################################### */ + /*}}}*/ +#ifndef PKGLIB_EDSPINDEXFILE_H +#define PKGLIB_EDSPINDEXFILE_H + +#include <apt-pkg/debindexfile.h> +#include <string> + +#ifndef APT_8_CLEANER_HEADERS +#include <apt-pkg/indexfile.h> +#endif + +class OpProgress; +class pkgCacheGenerator; + +class APT_HIDDEN edspLikeIndex : public pkgDebianIndexRealFile +{ +protected: + virtual bool OpenListFile(FileFd &Pkg, std::string const &File) APT_OVERRIDE; + virtual uint8_t GetIndexFlags() const APT_OVERRIDE; + virtual std::string GetArchitecture() const APT_OVERRIDE; + +public: + virtual bool Exists() const APT_OVERRIDE; + virtual bool HasPackages() const APT_OVERRIDE; + + edspLikeIndex(std::string const &File); + virtual ~edspLikeIndex(); +}; + +class APT_HIDDEN edspIndex : public edspLikeIndex +{ +protected: + APT_HIDDEN virtual pkgCacheListParser * CreateListParser(FileFd &Pkg) APT_OVERRIDE; + virtual std::string GetComponent() const APT_OVERRIDE; + +public: + virtual const Type *GetType() const APT_OVERRIDE APT_CONST; + + edspIndex(std::string const &File); + virtual ~edspIndex(); +}; + +class APT_HIDDEN eippIndex : public edspLikeIndex +{ +protected: + APT_HIDDEN virtual pkgCacheListParser * CreateListParser(FileFd &Pkg) APT_OVERRIDE; + virtual std::string GetComponent() const APT_OVERRIDE; + +public: + virtual const Type *GetType() const APT_OVERRIDE APT_CONST; + + eippIndex(std::string const &File); + virtual ~eippIndex(); +}; + +#endif diff --git a/apt-pkg/edsp/edsplistparser.cc b/apt-pkg/edsp/edsplistparser.cc new file mode 100644 index 000000000..4119639a6 --- /dev/null +++ b/apt-pkg/edsp/edsplistparser.cc @@ -0,0 +1,186 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + Package Cache Generator - Generator for the cache structure. + + This builds the cache structure from the abstract package list parser. + + ##################################################################### */ + /*}}}*/ +// Include Files /*{{{*/ +#include <config.h> + +#include <apt-pkg/configuration.h> +#include <apt-pkg/edsplistparser.h> +#include <apt-pkg/md5.h> +#include <apt-pkg/deblistparser.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/cacheiterators.h> +#include <apt-pkg/tagfile.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/pkgsystem.h> +#include <apt-pkg/string_view.h> + +#include <array> + + /*}}}*/ + +// ListParser::edspListParser - Constructor /*{{{*/ +edspLikeListParser::edspLikeListParser(FileFd * const File) : debListParser(File) +{ +} +edspListParser::edspListParser(FileFd * const File) : edspLikeListParser(File) +{ + std::string const states = _config->FindFile("Dir::State::extended_states"); + RemoveFile("edspListParserPrivate", states); + extendedstates.Open(states, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive, 0600); + std::string const prefs = _config->FindFile("Dir::Etc::preferences"); + RemoveFile("edspListParserPrivate", prefs); + preferences.Open(prefs, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive, 0600); +} + /*}}}*/ +// ListParser::NewVersion - Fill in the version structure /*{{{*/ +bool edspLikeListParser::NewVersion(pkgCache::VerIterator &Ver) +{ + _system->SetVersionMapping(Ver->ID, Section.FindI("APT-ID", Ver->ID)); + return debListParser::NewVersion(Ver); +} + /*}}}*/ +// ListParser::Description - Return the description string /*{{{*/ +// --------------------------------------------------------------------- +/* Sorry, no description for the resolvers… */ +std::vector<std::string> edspLikeListParser::AvailableDescriptionLanguages() +{ + return {}; +} +APT::StringView edspLikeListParser::Description_md5() +{ + return APT::StringView(); +} + /*}}}*/ +// ListParser::VersionHash - Compute a unique hash for this version /*{{{*/ +unsigned short edspLikeListParser::VersionHash() +{ + if (Section.Exists("APT-Hash") == true) + return Section.FindI("APT-Hash"); + else if (Section.Exists("APT-ID") == true) + return Section.FindI("APT-ID"); + return 0; +} + /*}}}*/ +// ListParser::LoadReleaseInfo - Load the release information /*{{{*/ +APT_CONST bool edspLikeListParser::LoadReleaseInfo(pkgCache::RlsFileIterator & /*FileI*/, + FileFd & /*File*/, std::string const &/*component*/) +{ + return true; +} + /*}}}*/ +// ListParser::ParseStatus - Parse the status field /*{{{*/ +// --------------------------------------------------------------------- +/* The Status: line here is not a normal dpkg one but just one which tells + use if the package is installed or not, where missing means not. */ +bool edspListParser::ParseStatus(pkgCache::PkgIterator &Pkg, + pkgCache::VerIterator &Ver) +{ + unsigned long state = 0; + if (Section.FindFlag("Hold",state,pkgCache::State::Hold) == false) + return false; + if (state != 0) + Pkg->SelectedState = pkgCache::State::Hold; + + state = 0; + if (Section.FindFlag("Installed",state,pkgCache::State::Installed) == false) + return false; + if (state != 0) + { + Pkg->CurrentState = pkgCache::State::Installed; + Pkg->CurrentVer = Ver.Index(); + } + + if (Section.FindB("APT-Automatic", false)) + { + std::string out; + strprintf(out, "Package: %s\nArchitecture: %s\nAuto-Installed: 1\n\n", Pkg.Name(), Pkg.Arch()); + if (extendedstates.Write(out.c_str(), out.length()) == false) + return false; + } + + // FIXME: Using an overriding pin is wrong. + if (Section.FindB("APT-Candidate", false)) + { + std::string out; + strprintf(out, "Package: %s\nPin: version %s\nPin-Priority: 9999\n\n", Pkg.FullName().c_str(), Ver.VerStr()); + if (preferences.Write(out.c_str(), out.length()) == false) + return false; + } + + signed short const pinvalue = Section.FindI("APT-Pin", 500); + if (pinvalue != 500) + { + std::string out; + strprintf(out, "Package: %s\nPin: version %s\nPin-Priority: %d\n\n", Pkg.FullName().c_str(), Ver.VerStr(), pinvalue); + if (preferences.Write(out.c_str(), out.length()) == false) + return false; + } + + return true; +} + /*}}}*/ + +// ListParser::eippListParser - Constructor /*{{{*/ +eippListParser::eippListParser(FileFd *File) : edspLikeListParser(File) +{ +} + /*}}}*/ +// ListParser::ParseStatus - Parse the status field /*{{{*/ +// --------------------------------------------------------------------- +/* The Status: line here is not a normal dpkg one but just one which tells + use if the package is installed or not, where missing means not. */ +bool eippListParser::ParseStatus(pkgCache::PkgIterator &Pkg, + pkgCache::VerIterator &Ver) +{ + // Process the flag field + static std::array<WordList, 8> const statusvalues = {{ + {"not-installed",pkgCache::State::NotInstalled}, + {"config-files",pkgCache::State::ConfigFiles}, + {"half-installed",pkgCache::State::HalfInstalled}, + {"unpacked",pkgCache::State::UnPacked}, + {"half-configured",pkgCache::State::HalfConfigured}, + {"triggers-awaited",pkgCache::State::TriggersAwaited}, + {"triggers-pending",pkgCache::State::TriggersPending}, + {"installed",pkgCache::State::Installed}, + }}; + auto const status = Section.Find("Status"); + if (status.empty() == false) + { + for (auto && sv: statusvalues) + { + if (status != sv.Str) + continue; + Pkg->CurrentState = sv.Val; + switch (Pkg->CurrentState) + { + case pkgCache::State::NotInstalled: + case pkgCache::State::ConfigFiles: + break; + case pkgCache::State::HalfInstalled: + case pkgCache::State::UnPacked: + case pkgCache::State::HalfConfigured: + case pkgCache::State::TriggersAwaited: + case pkgCache::State::TriggersPending: + case pkgCache::State::Installed: + Pkg->CurrentVer = Ver.Index(); + break; + } + break; + } + } + + return true; +} + /*}}}*/ + +edspLikeListParser::~edspLikeListParser() {} +edspListParser::~edspListParser() {} +eippListParser::~eippListParser() {} diff --git a/apt-pkg/edsp/edsplistparser.h b/apt-pkg/edsp/edsplistparser.h new file mode 100644 index 000000000..4904b6567 --- /dev/null +++ b/apt-pkg/edsp/edsplistparser.h @@ -0,0 +1,67 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + EDSP Package List Parser - This implements the abstract parser + interface for the APT specific intermediate format which is passed + to external resolvers + + ##################################################################### */ + /*}}}*/ +#ifndef PKGLIB_EDSPLISTPARSER_H +#define PKGLIB_EDSPLISTPARSER_H + +#include <apt-pkg/deblistparser.h> +#include <apt-pkg/md5.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/fileutl.h> + +#include <string> + +#ifndef APT_8_CLEANER_HEADERS +#include <apt-pkg/pkgcachegen.h> +#include <apt-pkg/indexfile.h> +#include <apt-pkg/tagfile.h> +#endif + +namespace APT { + class StringView; +} +class APT_HIDDEN edspLikeListParser : public debListParser +{ + public: + virtual bool NewVersion(pkgCache::VerIterator &Ver) APT_OVERRIDE; + virtual std::vector<std::string> AvailableDescriptionLanguages() APT_OVERRIDE; + virtual APT::StringView Description_md5() APT_OVERRIDE; + virtual unsigned short VersionHash() APT_OVERRIDE; + + bool LoadReleaseInfo(pkgCache::RlsFileIterator &FileI,FileFd &File, + std::string const §ion); + + edspLikeListParser(FileFd *File); + virtual ~edspLikeListParser(); +}; + +class APT_HIDDEN edspListParser : public edspLikeListParser +{ + FileFd extendedstates; + FileFd preferences; + +protected: + virtual bool ParseStatus(pkgCache::PkgIterator &Pkg,pkgCache::VerIterator &Ver) APT_OVERRIDE; + +public: + edspListParser(FileFd *File); + virtual ~edspListParser(); +}; + +class APT_HIDDEN eippListParser : public edspLikeListParser +{ +protected: + virtual bool ParseStatus(pkgCache::PkgIterator &Pkg,pkgCache::VerIterator &Ver) APT_OVERRIDE; + +public: + eippListParser(FileFd *File); + virtual ~eippListParser(); +}; +#endif diff --git a/apt-pkg/edsp/edspsystem.cc b/apt-pkg/edsp/edspsystem.cc new file mode 100644 index 000000000..1ceb21a17 --- /dev/null +++ b/apt-pkg/edsp/edspsystem.cc @@ -0,0 +1,167 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + This system provides the abstraction to use the scenario file as the + only source of package information to be able to feed the created file + back to APT for its own consumption (eat your own dogfood). + + ##################################################################### */ + /*}}}*/ +// Include Files /*{{{*/ +#include <config.h> + +#include <apt-pkg/configuration.h> +#include <apt-pkg/debversion.h> +#include <apt-pkg/edspindexfile.h> +#include <apt-pkg/edspsystem.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/cacheiterators.h> +#include <apt-pkg/fileutl.h> + +#include <stddef.h> +#include <stdlib.h> +#include <unistd.h> + +#include <string> +#include <vector> + + /*}}}*/ + +// System::System - Constructor /*{{{*/ +edspLikeSystem::edspLikeSystem(char const * const Label) : pkgSystem(Label, &debVS) +{ +} +edspSystem::edspSystem() : edspLikeSystem("Debian APT solver interface") +{ +} +eippSystem::eippSystem() : edspLikeSystem("Debian APT planner interface") +{ +} + /*}}}*/ +// System::Lock - Get the lock /*{{{*/ +bool edspLikeSystem::Lock() +{ + return true; +} + /*}}}*/ +// System::UnLock - Drop a lock /*{{{*/ +bool edspLikeSystem::UnLock(bool /*NoErrors*/) +{ + return true; +} + /*}}}*/ +// System::CreatePM - Create the underlying package manager /*{{{*/ +// --------------------------------------------------------------------- +/* we can't use edsp input as input for real installations - just a + simulation can work, but everything else will fail bigtime */ +pkgPackageManager *edspLikeSystem::CreatePM(pkgDepCache * /*Cache*/) const +{ + return nullptr; +} + /*}}}*/ +// System::Initialize - Setup the configuration space.. /*{{{*/ +bool edspLikeSystem::Initialize(Configuration &Cnf) +{ + Cnf.Set("Dir::Log", "/dev/null"); + // state is included completely in the input files + Cnf.Set("Dir::Etc::preferences", "/dev/null"); + Cnf.Set("Dir::Etc::preferencesparts", "/dev/null"); + Cnf.Set("Dir::State::status","/dev/null"); + Cnf.Set("Dir::State::extended_states","/dev/null"); + Cnf.Set("Dir::State::lists","/dev/null"); + // do not store an mmap cache + Cnf.Set("Dir::Cache::pkgcache", ""); + Cnf.Set("Dir::Cache::srcpkgcache", ""); + // the protocols only propose actions, not do them + Cnf.Set("Debug::NoLocking", "true"); + Cnf.Set("APT::Get::Simulate", "true"); + + StatusFile.reset(nullptr); + return true; +} +bool edspSystem::Initialize(Configuration &Cnf) +{ + if (edspLikeSystem::Initialize(Cnf) == false) + return false; + std::string const tmp = GetTempDir(); + char tmpname[300]; + snprintf(tmpname, sizeof(tmpname), "%s/apt-edsp-solver-XXXXXX", tmp.c_str()); + if (nullptr == mkdtemp(tmpname)) + return false; + tempDir = tmpname; + tempStatesFile = flCombine(tempDir, "extended_states"); + Cnf.Set("Dir::State::extended_states", tempStatesFile); + tempPrefsFile = flCombine(tempDir, "apt_preferences"); + Cnf.Set("Dir::Etc::preferences", tempPrefsFile); + return true; +} + /*}}}*/ +// System::ArchiveSupported - Is a file format supported /*{{{*/ +bool edspLikeSystem::ArchiveSupported(const char * /*Type*/) +{ + return false; +} + /*}}}*/ +// System::Score - Never use the EDSP system automatically /*{{{*/ +signed edspLikeSystem::Score(Configuration const &) +{ + return -1000; +} + /*}}}*/ +// System::FindIndex - Get an index file for status files /*{{{*/ +bool edspLikeSystem::FindIndex(pkgCache::PkgFileIterator File, + pkgIndexFile *&Found) const +{ + if (StatusFile == 0) + return false; + if (StatusFile->FindInCache(*File.Cache()) == File) + { + Found = StatusFile.get(); + return true; + } + + return false; +} + /*}}}*/ +bool edspSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List) /*{{{*/ +{ + if (StatusFile == nullptr) + { + if (_config->Find("edsp::scenario", "") == "/nonexistent/stdin") + StatusFile.reset(new edspIndex("/nonexistent/stdin")); + else + StatusFile.reset(new edspIndex(_config->FindFile("edsp::scenario"))); + } + List.push_back(StatusFile.get()); + return true; +} + /*}}}*/ +bool eippSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List) /*{{{*/ +{ + if (StatusFile == nullptr) + { + if (_config->Find("eipp::scenario", "") == "/nonexistent/stdin") + StatusFile.reset(new eippIndex("/nonexistent/stdin")); + else + StatusFile.reset(new eippIndex(_config->FindFile("eipp::scenario"))); + } + List.push_back(StatusFile.get()); + return true; +} + /*}}}*/ + +edspLikeSystem::~edspLikeSystem() {} +edspSystem::~edspSystem() +{ + if (tempDir.empty()) + return; + + RemoveFile("~edspSystem", tempStatesFile); + RemoveFile("~edspSystem", tempPrefsFile); + rmdir(tempDir.c_str()); +} +eippSystem::~eippSystem() {} + +APT_HIDDEN edspSystem edspSys; +APT_HIDDEN eippSystem eippSys; diff --git a/apt-pkg/edsp/edspsystem.h b/apt-pkg/edsp/edspsystem.h new file mode 100644 index 000000000..c0c9526b5 --- /dev/null +++ b/apt-pkg/edsp/edspsystem.h @@ -0,0 +1,69 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +// $Id: debsystem.h,v 1.4 2003/01/11 07:16:33 jgg Exp $ +/* ###################################################################### + + System - Debian version of the System Class + + ##################################################################### */ + /*}}}*/ +#ifndef PKGLIB_EDSPSYSTEM_H +#define PKGLIB_EDSPSYSTEM_H + +#include <apt-pkg/pkgsystem.h> +#include <apt-pkg/cacheiterators.h> +#include <apt-pkg/pkgcache.h> + +#include <memory> +#include <vector> + +#include <apt-pkg/macros.h> + +class Configuration; +class pkgDepCache; +class pkgIndexFile; +class pkgPackageManager; + +class APT_HIDDEN edspLikeSystem : public pkgSystem +{ +protected: + std::unique_ptr<pkgIndexFile> StatusFile; + +public: + virtual bool Lock() APT_OVERRIDE APT_CONST; + virtual bool UnLock(bool NoErrors = false) APT_OVERRIDE APT_CONST; + virtual pkgPackageManager *CreatePM(pkgDepCache *Cache) const APT_OVERRIDE APT_CONST; + virtual bool Initialize(Configuration &Cnf) APT_OVERRIDE; + virtual bool ArchiveSupported(const char *Type) APT_OVERRIDE APT_CONST; + virtual signed Score(Configuration const &Cnf) APT_OVERRIDE; + virtual bool FindIndex(pkgCache::PkgFileIterator File, + pkgIndexFile *&Found) const APT_OVERRIDE; + + edspLikeSystem(char const * const Label); + virtual ~edspLikeSystem(); +}; + +class APT_HIDDEN edspSystem : public edspLikeSystem +{ + std::string tempDir; + std::string tempStatesFile; + std::string tempPrefsFile; + +public: + virtual bool Initialize(Configuration &Cnf) APT_OVERRIDE; + virtual bool AddStatusFiles(std::vector<pkgIndexFile *> &List) APT_OVERRIDE; + + edspSystem(); + virtual ~edspSystem(); +}; + +class APT_HIDDEN eippSystem : public edspLikeSystem +{ + public: + virtual bool AddStatusFiles(std::vector<pkgIndexFile *> &List) APT_OVERRIDE; + + eippSystem(); + virtual ~eippSystem(); +}; + +#endif |