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https://github.com/Icinga/icinga2.git
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0eeac3b385
not to run into an exec(3) error E2BIG due to a too long argument. This sends a notification with truncated output instead of not sending.
124 lines
4.0 KiB
C++
124 lines
4.0 KiB
C++
/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
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#include "methods/pluginnotificationtask.hpp"
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#include "icinga/notification.hpp"
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#include "icinga/notificationcommand.hpp"
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#include "icinga/pluginutility.hpp"
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#include "icinga/service.hpp"
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#include "icinga/macroprocessor.hpp"
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#include "base/function.hpp"
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#include "base/logger.hpp"
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#include "base/utility.hpp"
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#include "base/process.hpp"
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#include "base/convert.hpp"
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#ifdef __linux__
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# include <linux/binfmts.h>
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# include <unistd.h>
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# ifndef PAGE_SIZE
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// MAX_ARG_STRLEN is a multiple of PAGE_SIZE which is missing
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# define PAGE_SIZE getpagesize()
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# endif /* PAGE_SIZE */
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// Make e.g. the $host.output$ itself even 10% shorter to leave enough room
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// for e.g. --host-output= as in --host-output=$host.output$, but without int overflow
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const static auto l_MaxOutLen = MAX_ARG_STRLEN - MAX_ARG_STRLEN / 10u;
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#endif /* __linux__ */
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using namespace icinga;
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REGISTER_FUNCTION_NONCONST(Internal, PluginNotification, &PluginNotificationTask::ScriptFunc, "notification:user:cr:itype:author:comment:resolvedMacros:useResolvedMacros");
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void PluginNotificationTask::ScriptFunc(const Notification::Ptr& notification,
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const User::Ptr& user, const CheckResult::Ptr& cr, int itype,
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const String& author, const String& comment, const Dictionary::Ptr& resolvedMacros,
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bool useResolvedMacros)
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{
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REQUIRE_NOT_NULL(notification);
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REQUIRE_NOT_NULL(user);
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NotificationCommand::Ptr commandObj = NotificationCommand::ExecuteOverride ? NotificationCommand::ExecuteOverride : notification->GetCommand();
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auto type = static_cast<NotificationType>(itype);
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Checkable::Ptr checkable = notification->GetCheckable();
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Dictionary::Ptr notificationExtra = new Dictionary({
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{ "type", Notification::NotificationTypeToStringCompat(type) }, //TODO: Change that to our types.
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{ "author", author },
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#ifdef __linux__
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{ "comment", comment.SubStr(0, l_MaxOutLen) }
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#else /* __linux__ */
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{ "comment", comment }
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#endif /* __linux__ */
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});
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Host::Ptr host;
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Service::Ptr service;
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tie(host, service) = GetHostService(checkable);
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MacroProcessor::ResolverList resolvers;
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if (MacroResolver::OverrideMacros)
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resolvers.emplace_back("override", MacroResolver::OverrideMacros);
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resolvers.emplace_back("user", user);
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resolvers.emplace_back("notification", notificationExtra);
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resolvers.emplace_back("notification", notification);
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if (service) {
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#ifdef __linux__
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auto cr (service->GetLastCheckResult());
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if (cr) {
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auto output (cr->GetOutput());
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if (output.GetLength() > l_MaxOutLen) {
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resolvers.emplace_back("service", new Dictionary({{"output", output.SubStr(0, l_MaxOutLen)}}));
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}
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}
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#endif /* __linux__ */
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resolvers.emplace_back("service", service);
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}
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#ifdef __linux__
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auto hcr (host->GetLastCheckResult());
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if (hcr) {
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auto output (hcr->GetOutput());
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if (output.GetLength() > l_MaxOutLen) {
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resolvers.emplace_back("host", new Dictionary({{"output", output.SubStr(0, l_MaxOutLen)}}));
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}
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}
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#endif /* __linux__ */
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resolvers.emplace_back("host", host);
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resolvers.emplace_back("command", commandObj);
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int timeout = commandObj->GetTimeout();
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std::function<void(const Value& commandLine, const ProcessResult&)> callback;
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if (Checkable::ExecuteCommandProcessFinishedHandler) {
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callback = Checkable::ExecuteCommandProcessFinishedHandler;
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} else {
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callback = [checkable](const Value& commandline, const ProcessResult& pr) { ProcessFinishedHandler(checkable, commandline, pr); };
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}
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PluginUtility::ExecuteCommand(commandObj, checkable, cr, resolvers,
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resolvedMacros, useResolvedMacros, timeout, callback);
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}
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void PluginNotificationTask::ProcessFinishedHandler(const Checkable::Ptr& checkable, const Value& commandLine, const ProcessResult& pr)
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{
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if (pr.ExitStatus != 0) {
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Process::Arguments parguments = Process::PrepareCommand(commandLine);
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Log(LogWarning, "PluginNotificationTask")
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<< "Notification command for object '" << checkable->GetName() << "' (PID: " << pr.PID
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<< ", arguments: " << Process::PrettyPrintArguments(parguments) << ") terminated with exit code "
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<< pr.ExitStatus << ", output: " << pr.Output;
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}
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}
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