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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include <string> |
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#include "monitor.h" |
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#include "swissknife.h" |
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#include "util/exception.h" |
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#include "util/logging.h" |
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#include "util/posix.h" |
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#include "util/string.h" |
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#include "reactor.h" |
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static const char *kDefaultReceiverLogDir = "/var/log/cvmfs_receiver/"; |
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static const char *kDefaultDebugLog = "/dev/null"; |
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swissknife::ParameterList MakeParameterList() { |
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swissknife::ParameterList params; |
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params.push_back( |
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swissknife::Parameter::Optional('i', "File descriptor to use for input")); |
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params.push_back(swissknife::Parameter::Optional( |
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'o', "File descriptor to use for output")); |
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params.push_back(swissknife::Parameter::Optional( |
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'w', "Watchdog stacktrace output dir, " |
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"use without parameter to disable watchdog. " |
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"Default: " + std::string(kDefaultReceiverLogDir))); |
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params.push_back(swissknife::Parameter::Optional( |
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'd', "Path to debug log. Ignored if the non-debug version runs, " |
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"Default: " + std::string(kDefaultDebugLog))); |
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return params; |
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} |
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bool ReadCmdLineArguments(int argc, char** argv, |
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const swissknife::ParameterList& params, |
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swissknife::ArgumentList* arguments) { |
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// parse the command line arguments for the Command |
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optind = 1; |
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std::string option_string = ""; |
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for (unsigned j = 0; j < params.size(); ++j) { |
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option_string.push_back(params[j].key()); |
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if (!params[j].switch_only()) option_string.push_back(':'); |
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} |
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int c; |
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while ((c = getopt(argc, argv, option_string.c_str())) != -1) { |
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bool valid_option = false; |
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for (unsigned j = 0; j < params.size(); ++j) { |
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if (c == params[j].key()) { |
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valid_option = true; |
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(*arguments)[c].Reset(); |
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if (!params[j].switch_only()) { |
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(*arguments)[c].Reset(new std::string(optarg)); |
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} |
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break; |
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} |
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} |
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if (!valid_option) { |
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LogCvmfs(kLogReceiver, kLogSyslog, |
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"CVMFS gateway services receiver component. Usage:"); |
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for (size_t i = 0; i < params.size(); ++i) { |
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LogCvmfs(kLogReceiver, kLogSyslog, " \"%c\" - %s", params[i].key(), |
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params[i].description().c_str()); |
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} |
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return false; |
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} |
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} |
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for (size_t j = 0; j < params.size(); ++j) { |
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if (!params[j].optional()) { |
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if (arguments->find(params[j].key()) == arguments->end()) { |
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LogCvmfs(kLogReceiver, kLogSyslogErr, "parameter -%c missing", |
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params[j].key()); |
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return false; |
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} |
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} |
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} |
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return true; |
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} |
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int main(int argc, char** argv) { |
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swissknife::ArgumentList arguments; |
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if (!ReadCmdLineArguments(argc, argv, MakeParameterList(), &arguments)) { |
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return 1; |
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} |
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// The receiver is spawned from the gateway go service. The gateway connects |
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// a pipe to stdout and stderr but will collect the results only at the end. |
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// This means that only small pieces of output can be send to stdout or |
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// stderr, otherwise the pipes run full and block. |
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// This should probably be addressed. |
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// |
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// For the debug mode, the gateway sets a debug log file that is collected |
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// after the application quits. |
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SetLogSyslogFacility(1); |
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SetLogSyslogShowPID(true); |
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int fdin = 0; |
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int fdout = 1; |
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std::string watchdog_out_dir = kDefaultReceiverLogDir; |
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std::string debug_log = kDefaultDebugLog; |
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if (arguments.find('i') != arguments.end()) { |
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fdin = std::atoi(arguments.find('i')->second->c_str()); |
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} |
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if (arguments.find('o') != arguments.end()) { |
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fdout = std::atoi(arguments.find('o')->second->c_str()); |
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} |
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if (arguments.find('w') != arguments.end()) { |
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watchdog_out_dir = *arguments.find('w')->second; |
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} |
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if (arguments.find('d') != arguments.end()) { |
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debug_log = *arguments.find('d')->second; |
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} |
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// The gateway hard-codes this to /var/log/cvmfs_receiver/debug.log |
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SetLogDebugFile(debug_log); |
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// Spawn monitoring process (watchdog) |
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UniquePtr<Watchdog> watchdog; |
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if (watchdog_out_dir != "") { |
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if (!MkdirDeep(watchdog_out_dir, 0755)) { |
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LogCvmfs(kLogReceiver, kLogSyslogErr | kLogStderr, |
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"Failed to create stacktrace directory: %s", |
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watchdog_out_dir.c_str()); |
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return 1; |
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} |
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std::string timestamp = GetGMTimestamp("%Y.%m.%d-%H.%M.%S"); |
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watchdog = Watchdog::Create(NULL); |
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if (watchdog.IsValid() == false) { |
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LogCvmfs(kLogReceiver, kLogSyslogErr | kLogStderr, |
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"Failed to initialize watchdog"); |
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return 1; |
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} |
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watchdog->Spawn(watchdog_out_dir + "/stacktrace." + timestamp); |
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} |
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LogCvmfs(kLogReceiver, kLogSyslog, "CVMFS receiver started"); |
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receiver::Reactor reactor(fdin, fdout); |
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try { |
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if (!reactor.Run()) { |
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LogCvmfs(kLogReceiver, kLogSyslogErr, |
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"Error running CVMFS Receiver event loop"); |
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return 1; |
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} |
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} catch (const ECvmfsException& e) { |
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LogCvmfs(kLogReceiver, kLogSyslogErr, |
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"Runtime error during CVMFS Receiver event loop.\n" |
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"%s", |
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e.what()); |
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return 2; |
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} catch (...) { |
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LogCvmfs(kLogReceiver, kLogSyslogErr, |
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"Unknown error during CVMFS Receiver event loop.\n"); |
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return 3; |
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} |
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LogCvmfs(kLogReceiver, kLogSyslog, "CVMFS receiver finished"); |
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return 0; |
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} |
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