| /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
| /** |
| * Copyright (c) 2014, Regents of the University of California, |
| * Arizona Board of Regents, |
| * Colorado State University, |
| * University Pierre & Marie Curie, Sorbonne University, |
| * Washington University in St. Louis, |
| * Beijing Institute of Technology, |
| * The University of Memphis |
| * |
| * This file is part of NFD (Named Data Networking Forwarding Daemon). |
| * See AUTHORS.md for complete list of NFD authors and contributors. |
| * |
| * NFD is free software: you can redistribute it and/or modify it under the terms |
| * of the GNU General Public License as published by the Free Software Foundation, |
| * either version 3 of the License, or (at your option) any later version. |
| * |
| * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
| * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| * PURPOSE. See the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>. |
| * |
| * @author Jerald Paul Abraham <jeraldabraham@email.arizona.edu> |
| */ |
| |
| #include "version.hpp" |
| |
| #include <ndn-cxx/face.hpp> |
| #include <ndn-cxx/name.hpp> |
| #include <ndn-cxx/interest.hpp> |
| #include <ndn-cxx/encoding/buffer-stream.hpp> |
| |
| #include <ndn-cxx/management/nfd-forwarder-status.hpp> |
| #include <ndn-cxx/management/nfd-channel-status.hpp> |
| #include <ndn-cxx/management/nfd-face-status.hpp> |
| #include <ndn-cxx/management/nfd-fib-entry.hpp> |
| #include <ndn-cxx/management/nfd-strategy-choice.hpp> |
| |
| #include <boost/algorithm/string/replace.hpp> |
| #include <list> |
| |
| namespace ndn { |
| |
| class NfdStatus |
| { |
| public: |
| explicit |
| NfdStatus(char* toolName) |
| : m_toolName(toolName) |
| , m_needVersionRetrieval(false) |
| , m_needChannelStatusRetrieval(false) |
| , m_needFaceStatusRetrieval(false) |
| , m_needFibEnumerationRetrieval(false) |
| , m_needStrategyChoiceRetrieval(false) |
| , m_isOutputXml(false) |
| { |
| } |
| |
| void |
| usage() |
| { |
| std::cout << "Usage: \n " << m_toolName << " [options]\n\n" |
| "Show NFD version and status information\n\n" |
| "Options:\n" |
| " [-h] - print this help message\n" |
| " [-v] - retrieve version information\n" |
| " [-c] - retrieve channel status information\n" |
| " [-f] - retrieve face status information\n" |
| " [-b] - retrieve FIB information\n" |
| " [-s] - retrieve configured strategy choice for NDN namespaces\n" |
| " [-x] - retrieve NFD status information in XML format\n" |
| "\n" |
| " [-V] - show version information of nfd-status and exit\n" |
| "\n" |
| "If no options are provided, all information is retrieved.\n" |
| "If -x is provided, other options(v, f and b) are ignored, and all information is retrieved in XML format.\n" |
| ; |
| } |
| |
| void |
| enableVersionRetrieval() |
| { |
| m_needVersionRetrieval = true; |
| } |
| |
| void |
| enableChannelStatusRetrieval() |
| { |
| m_needChannelStatusRetrieval = true; |
| } |
| |
| void |
| enableFaceStatusRetrieval() |
| { |
| m_needFaceStatusRetrieval = true; |
| } |
| |
| void |
| enableFibEnumerationRetrieval() |
| { |
| m_needFibEnumerationRetrieval = true; |
| } |
| |
| void |
| enableStrategyChoiceRetrieval() |
| { |
| m_needStrategyChoiceRetrieval = true; |
| } |
| |
| void |
| enableXmlOutput() |
| { |
| m_isOutputXml = true; |
| } |
| |
| void |
| onTimeout() |
| { |
| std::cerr << "Request timed out" << std::endl; |
| |
| runNextStep(); |
| } |
| |
| void |
| fetchSegments(const Data& data, void (NfdStatus::*onDone)()) |
| { |
| m_buffer->write((const char*)data.getContent().value(), |
| data.getContent().value_size()); |
| |
| uint64_t currentSegment = data.getName().get(-1).toSegment(); |
| |
| const name::Component& finalBlockId = data.getMetaInfo().getFinalBlockId(); |
| if (finalBlockId.empty() || |
| finalBlockId.toSegment() > currentSegment) |
| { |
| m_face.expressInterest(data.getName().getPrefix(-1).appendSegment(currentSegment+1), |
| bind(&NfdStatus::fetchSegments, this, _2, onDone), |
| bind(&NfdStatus::onTimeout, this)); |
| } |
| else |
| { |
| return (this->*onDone)(); |
| } |
| } |
| |
| void |
| escapeSpecialCharacters(std::string *data) |
| { |
| using boost::algorithm::replace_all; |
| replace_all(*data, "&", "&"); |
| replace_all(*data, "\"", """); |
| replace_all(*data, "\'", "'"); |
| replace_all(*data, "<", "<"); |
| replace_all(*data, ">", ">"); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////// |
| ////////////////////////////////////////////////////////////////////////////////// |
| |
| void |
| fetchVersionInformation() |
| { |
| Interest interest("/localhost/nfd/status"); |
| interest.setChildSelector(1); |
| interest.setMustBeFresh(true); |
| m_face.expressInterest( |
| interest, |
| bind(&NfdStatus::afterFetchedVersionInformation, this, _2), |
| bind(&NfdStatus::onTimeout, this)); |
| } |
| |
| void |
| afterFetchedVersionInformation(const Data& data) |
| { |
| nfd::ForwarderStatus status(data.getContent()); |
| if (m_isOutputXml) |
| { |
| std::cout << "<generalStatus>"; |
| std::cout << "<version>" |
| << status.getNfdVersion() << "</version>"; |
| std::cout << "<startTime>" |
| << time::toString(status.getStartTimestamp(), "%Y-%m-%dT%H:%M:%S%F") |
| << "</startTime>"; |
| std::cout << "<currentTime>" |
| << time::toString(status.getCurrentTimestamp(), "%Y-%m-%dT%H:%M:%S%F") |
| << "</currentTime>"; |
| std::cout << "<uptime>PT" |
| << time::duration_cast<time::seconds>(status.getCurrentTimestamp() |
| - status.getStartTimestamp()).count() |
| << "S</uptime>"; |
| std::cout << "<nNameTreeEntries>" << status.getNNameTreeEntries() |
| << "</nNameTreeEntries>"; |
| std::cout << "<nFibEntries>" << status.getNFibEntries() |
| << "</nFibEntries>"; |
| std::cout << "<nPitEntries>" << status.getNPitEntries() |
| << "</nPitEntries>"; |
| std::cout << "<nMeasurementsEntries>" << status.getNMeasurementsEntries() |
| << "</nMeasurementsEntries>"; |
| std::cout << "<nCsEntries>" << status.getNCsEntries() |
| << "</nCsEntries>"; |
| std::cout << "<packetCounters>"; |
| std::cout << "<incomingPackets>"; |
| std::cout << "<nInterests>" << status.getNInInterests() |
| << "</nInterests>"; |
| std::cout << "<nDatas>" << status.getNInDatas() |
| << "</nDatas>"; |
| std::cout << "</incomingPackets>"; |
| std::cout << "<outgoingPackets>"; |
| std::cout << "<nInterests>" << status.getNOutInterests() |
| << "</nInterests>"; |
| std::cout << "<nDatas>" << status.getNOutDatas() |
| << "</nDatas>"; |
| std::cout << "</outgoingPackets>"; |
| std::cout << "</packetCounters>"; |
| std::cout << "</generalStatus>"; |
| } |
| else |
| { |
| std::cout << "General NFD status:" << std::endl; |
| std::cout << " version=" |
| << status.getNfdVersion() << std::endl; |
| std::cout << " startTime=" |
| << time::toIsoString(status.getStartTimestamp()) << std::endl; |
| std::cout << " currentTime=" |
| << time::toIsoString(status.getCurrentTimestamp()) << std::endl; |
| std::cout << " uptime=" |
| << time::duration_cast<time::seconds>(status.getCurrentTimestamp() |
| - status.getStartTimestamp()) << std::endl; |
| |
| std::cout << " nNameTreeEntries=" << status.getNNameTreeEntries() << std::endl; |
| std::cout << " nFibEntries=" << status.getNFibEntries() << std::endl; |
| std::cout << " nPitEntries=" << status.getNPitEntries() << std::endl; |
| std::cout << " nMeasurementsEntries=" << status.getNMeasurementsEntries() << std::endl; |
| std::cout << " nCsEntries=" << status.getNCsEntries() << std::endl; |
| std::cout << " nInInterests=" << status.getNInInterests() << std::endl; |
| std::cout << " nOutInterests=" << status.getNOutInterests() << std::endl; |
| std::cout << " nInDatas=" << status.getNInDatas() << std::endl; |
| std::cout << " nOutDatas=" << status.getNOutDatas() << std::endl; |
| } |
| |
| runNextStep(); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////// |
| ////////////////////////////////////////////////////////////////////////////////// |
| |
| void |
| fetchChannelStatusInformation() |
| { |
| m_buffer = make_shared<OBufferStream>(); |
| |
| Interest interest("/localhost/nfd/faces/channels"); |
| interest.setChildSelector(1); |
| interest.setMustBeFresh(true); |
| |
| m_face.expressInterest(interest, |
| bind(&NfdStatus::fetchSegments, this, _2, |
| &NfdStatus::afterFetchedChannelStatusInformation), |
| bind(&NfdStatus::onTimeout, this)); |
| } |
| |
| void |
| afterFetchedChannelStatusInformation() |
| { |
| ConstBufferPtr buf = m_buffer->buf(); |
| if (m_isOutputXml) |
| { |
| std::cout << "<channels>"; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode ChannelStatus TLV" << std::endl; |
| break; |
| } |
| |
| offset += block.size(); |
| |
| nfd::ChannelStatus channelStatus(block); |
| |
| std::cout << "<channel>"; |
| |
| std::string localUri(channelStatus.getLocalUri()); |
| escapeSpecialCharacters(&localUri); |
| std::cout << "<localUri>" << localUri << "</localUri>"; |
| std::cout << "</channel>"; |
| } |
| std::cout << "</channels>"; |
| } |
| else |
| { |
| std::cout << "Channels:" << std::endl; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode ChannelStatus TLV" << std::endl; |
| break; |
| } |
| |
| offset += block.size(); |
| |
| nfd::ChannelStatus channelStatus(block); |
| std::cout << " " << channelStatus.getLocalUri() << std::endl; |
| } |
| } |
| |
| runNextStep(); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////// |
| ////////////////////////////////////////////////////////////////////////////////// |
| |
| void |
| fetchFaceStatusInformation() |
| { |
| m_buffer = make_shared<OBufferStream>(); |
| |
| Interest interest("/localhost/nfd/faces/list"); |
| interest.setChildSelector(1); |
| interest.setMustBeFresh(true); |
| |
| m_face.expressInterest(interest, |
| bind(&NfdStatus::fetchSegments, this, _2, |
| &NfdStatus::afterFetchedFaceStatusInformation), |
| bind(&NfdStatus::onTimeout, this)); |
| } |
| |
| void |
| afterFetchedFaceStatusInformation() |
| { |
| ConstBufferPtr buf = m_buffer->buf(); |
| if (m_isOutputXml) |
| { |
| std::cout << "<faces>"; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode FaceStatus TLV" << std::endl; |
| break; |
| } |
| |
| offset += block.size(); |
| |
| nfd::FaceStatus faceStatus(block); |
| |
| std::cout << "<face>"; |
| std::cout << "<faceId>" << faceStatus.getFaceId() << "</faceId>"; |
| |
| std::string remoteUri(faceStatus.getRemoteUri()); |
| escapeSpecialCharacters(&remoteUri); |
| std::cout << "<remoteUri>" << remoteUri << "</remoteUri>"; |
| |
| std::string localUri(faceStatus.getLocalUri()); |
| escapeSpecialCharacters(&localUri); |
| std::cout << "<localUri>" << localUri << "</localUri>"; |
| std::cout << "<packetCounters>"; |
| std::cout << "<incomingPackets>"; |
| std::cout << "<nInterests>" << faceStatus.getNInInterests() |
| << "</nInterests>"; |
| std::cout << "<nDatas>" << faceStatus.getNInInterests() |
| << "</nDatas>"; |
| std::cout << "</incomingPackets>"; |
| std::cout << "<outgoingPackets>"; |
| std::cout << "<nInterests>" << faceStatus.getNOutInterests() |
| << "</nInterests>"; |
| std::cout << "<nDatas>" << faceStatus.getNOutInterests() |
| << "</nDatas>"; |
| std::cout << "</outgoingPackets>"; |
| std::cout << "</packetCounters>"; |
| std::cout << "</face>"; |
| } |
| std::cout << "</faces>"; |
| } |
| else |
| { |
| std::cout << "Faces:" << std::endl; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode FaceStatus TLV" << std::endl; |
| break; |
| } |
| |
| offset += block.size(); |
| |
| nfd::FaceStatus faceStatus(block); |
| |
| std::cout << " faceid=" << faceStatus.getFaceId() |
| << " remote=" << faceStatus.getRemoteUri() |
| << " local=" << faceStatus.getLocalUri() |
| << " counters={" |
| << "in={" << faceStatus.getNInInterests() << "i " |
| << faceStatus.getNInDatas() << "d}" |
| << " out={" << faceStatus.getNOutInterests() << "i " |
| << faceStatus.getNOutDatas() << "d}" |
| << "}" << std::endl; |
| } |
| } |
| |
| runNextStep(); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////// |
| ////////////////////////////////////////////////////////////////////////////////// |
| |
| void |
| fetchFibEnumerationInformation() |
| { |
| m_buffer = make_shared<OBufferStream>(); |
| |
| Interest interest("/localhost/nfd/fib/list"); |
| interest.setChildSelector(1); |
| interest.setMustBeFresh(true); |
| m_face.expressInterest(interest, |
| bind(&NfdStatus::fetchSegments, this, _2, |
| &NfdStatus::afterFetchedFibEnumerationInformation), |
| bind(&NfdStatus::onTimeout, this)); |
| } |
| |
| void |
| afterFetchedFibEnumerationInformation() |
| { |
| ConstBufferPtr buf = m_buffer->buf(); |
| if (m_isOutputXml) |
| { |
| std::cout << "<fib>"; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode FibEntry TLV"; |
| break; |
| } |
| offset += block.size(); |
| |
| nfd::FibEntry fibEntry(block); |
| |
| std::cout << "<fibEntry>"; |
| std::string prefix(fibEntry.getPrefix().toUri()); |
| escapeSpecialCharacters(&prefix); |
| std::cout << "<prefix>" << prefix << "</prefix>"; |
| std::cout << "<nextHops>"; |
| for (std::list<nfd::NextHopRecord>::const_iterator |
| nextHop = fibEntry.getNextHopRecords().begin(); |
| nextHop != fibEntry.getNextHopRecords().end(); |
| ++nextHop) |
| { |
| std::cout << "<nextHop>" ; |
| std::cout << "<faceId>" << nextHop->getFaceId() << "</faceId>"; |
| std::cout << "<cost>" << nextHop->getCost() << "</cost>"; |
| std::cout << "</nextHop>"; |
| } |
| std::cout << "</nextHops>"; |
| std::cout << "</fibEntry>"; |
| } |
| |
| std::cout << "</fib>"; |
| } |
| else |
| { |
| std::cout << "FIB:" << std::endl; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode FibEntry TLV" << std::endl; |
| break; |
| } |
| offset += block.size(); |
| |
| nfd::FibEntry fibEntry(block); |
| |
| std::cout << " " << fibEntry.getPrefix() << " nexthops={"; |
| for (std::list<nfd::NextHopRecord>::const_iterator |
| nextHop = fibEntry.getNextHopRecords().begin(); |
| nextHop != fibEntry.getNextHopRecords().end(); |
| ++nextHop) |
| { |
| if (nextHop != fibEntry.getNextHopRecords().begin()) |
| std::cout << ", "; |
| std::cout << "faceid=" << nextHop->getFaceId() |
| << " (cost=" << nextHop->getCost() << ")"; |
| } |
| std::cout << "}" << std::endl; |
| } |
| } |
| |
| runNextStep(); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////////// |
| ////////////////////////////////////////////////////////////////////////////////// |
| |
| void |
| fetchStrategyChoiceInformation() |
| { |
| m_buffer = make_shared<OBufferStream>(); |
| |
| Interest interest("/localhost/nfd/strategy-choice/list"); |
| interest.setChildSelector(1); |
| interest.setMustBeFresh(true); |
| m_face.expressInterest(interest, |
| bind(&NfdStatus::fetchSegments, this, _2, |
| &NfdStatus::afterFetchedStrategyChoiceInformationInformation), |
| bind(&NfdStatus::onTimeout, this)); |
| } |
| |
| void |
| afterFetchedStrategyChoiceInformationInformation() |
| { |
| ConstBufferPtr buf = m_buffer->buf(); |
| if (m_isOutputXml) |
| { |
| std::cout << "<strategyChoices>"; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode StrategyChoice TLV"; |
| break; |
| } |
| offset += block.size(); |
| |
| nfd::StrategyChoice strategyChoice(block); |
| |
| std::cout << "<strategyChoice>"; |
| |
| std::string name(strategyChoice.getName().toUri()); |
| escapeSpecialCharacters(&name); |
| std::cout << "<namespace>" << name << "</namespace>"; |
| std::cout << "<strategy>"; |
| |
| std::string strategy(strategyChoice.getStrategy().toUri()); |
| escapeSpecialCharacters(&strategy); |
| |
| std::cout << "<name>" << strategy << "</name>"; |
| std::cout << "</strategy>"; |
| std::cout << "</strategyChoice>"; |
| } |
| |
| std::cout << "</strategyChoices>"; |
| } |
| else |
| { |
| std::cout << "Strategy choices:" << std::endl; |
| |
| Block block; |
| size_t offset = 0; |
| while (offset < buf->size()) |
| { |
| bool ok = Block::fromBuffer(buf, offset, block); |
| if (!ok) |
| { |
| std::cerr << "ERROR: cannot decode StrategyChoice TLV" << std::endl; |
| break; |
| } |
| offset += block.size(); |
| |
| nfd::StrategyChoice strategyChoice(block); |
| |
| std::cout << " " << strategyChoice.getName() |
| << " strategy=" << strategyChoice.getStrategy() << std::endl; |
| } |
| } |
| |
| runNextStep(); |
| } |
| |
| void |
| fetchInformation() |
| { |
| if (m_isOutputXml || |
| (!m_needVersionRetrieval && |
| !m_needChannelStatusRetrieval && |
| !m_needFaceStatusRetrieval && |
| !m_needFibEnumerationRetrieval && |
| !m_needStrategyChoiceRetrieval)) |
| { |
| enableVersionRetrieval(); |
| enableChannelStatusRetrieval(); |
| enableFaceStatusRetrieval(); |
| enableFibEnumerationRetrieval(); |
| enableStrategyChoiceRetrieval(); |
| } |
| |
| if (m_isOutputXml) |
| m_fetchSteps.push_back(bind(&NfdStatus::printXmlHeader, this)); |
| |
| if (m_needVersionRetrieval) |
| m_fetchSteps.push_back(bind(&NfdStatus::fetchVersionInformation, this)); |
| |
| if (m_needChannelStatusRetrieval) |
| m_fetchSteps.push_back(bind(&NfdStatus::fetchChannelStatusInformation, this)); |
| |
| if (m_needFaceStatusRetrieval) |
| m_fetchSteps.push_back(bind(&NfdStatus::fetchFaceStatusInformation, this)); |
| |
| if (m_needFibEnumerationRetrieval) |
| m_fetchSteps.push_back(bind(&NfdStatus::fetchFibEnumerationInformation, this)); |
| |
| if (m_needStrategyChoiceRetrieval) |
| m_fetchSteps.push_back(bind(&NfdStatus::fetchStrategyChoiceInformation, this)); |
| |
| if (m_isOutputXml) |
| m_fetchSteps.push_back(bind(&NfdStatus::printXmlFooter, this)); |
| |
| runNextStep(); |
| m_face.processEvents(); |
| } |
| |
| private: |
| void |
| printXmlHeader() |
| { |
| std::cout << "<?xml version=\"1.0\"?>"; |
| std::cout << "<nfdStatus xmlns=\"ndn:/localhost/nfd/status/1\">"; |
| |
| runNextStep(); |
| } |
| |
| void |
| printXmlFooter() |
| { |
| std::cout << "</nfdStatus>"; |
| |
| runNextStep(); |
| } |
| |
| void |
| runNextStep() |
| { |
| if (m_fetchSteps.empty()) |
| return; |
| |
| function<void()> nextStep = m_fetchSteps.front(); |
| m_fetchSteps.pop_front(); |
| nextStep(); |
| } |
| |
| private: |
| std::string m_toolName; |
| bool m_needVersionRetrieval; |
| bool m_needChannelStatusRetrieval; |
| bool m_needFaceStatusRetrieval; |
| bool m_needFibEnumerationRetrieval; |
| bool m_needStrategyChoiceRetrieval; |
| bool m_isOutputXml; |
| Face m_face; |
| |
| shared_ptr<OBufferStream> m_buffer; |
| |
| std::deque<function<void()> > m_fetchSteps; |
| }; |
| |
| } |
| |
| int main(int argc, char* argv[]) |
| { |
| int option; |
| ndn::NfdStatus nfdStatus(argv[0]); |
| |
| while ((option = getopt(argc, argv, "hvcfbsxV")) != -1) { |
| switch (option) { |
| case 'h': |
| nfdStatus.usage(); |
| return 0; |
| case 'v': |
| nfdStatus.enableVersionRetrieval(); |
| break; |
| case 'c': |
| nfdStatus.enableChannelStatusRetrieval(); |
| break; |
| case 'f': |
| nfdStatus.enableFaceStatusRetrieval(); |
| break; |
| case 'b': |
| nfdStatus.enableFibEnumerationRetrieval(); |
| break; |
| case 's': |
| nfdStatus.enableStrategyChoiceRetrieval(); |
| break; |
| case 'x': |
| nfdStatus.enableXmlOutput(); |
| break; |
| case 'V': |
| std::cout << NFD_VERSION_BUILD_STRING << std::endl; |
| return 0; |
| default: |
| nfdStatus.usage(); |
| return 1; |
| } |
| } |
| |
| try { |
| nfdStatus.fetchInformation(); |
| } |
| catch (std::exception& e) { |
| std::cerr << "ERROR: " << e.what() << std::endl; |
| return 2; |
| } |
| |
| return 0; |
| } |