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/*
* This file is part of PowerDNS or dnsdist.
* Copyright -- PowerDNS.COM B.V. and its contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* In addition, for the avoidance of any doubt, permission is granted to
* link this program with OpenSSL and to (re)distribute the binaries
* produced as the result of such linking.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <mutex>
#include <sys/time.h>
#include "dolog.hh"
namespace dnsdist::logging
{
std::optional<std::ofstream> LoggingConfiguration::s_verboseStream{std::nullopt};
std::string LoggingConfiguration::s_structuredLevelPrefix{"prio"};
LoggingConfiguration::TimeFormat LoggingConfiguration::s_structuredTimeFormat{LoggingConfiguration::TimeFormat::Numeric};
bool LoggingConfiguration::s_structuredLogging{false};
bool LoggingConfiguration::s_logTimestamps{false};
bool LoggingConfiguration::s_syslog{true};
namespace
{
const char* getTimeFormat()
{
if (!dnsdist::logging::LoggingConfiguration::getStructuredLogging()) {
return "%b %d %H:%M:%S ";
}
auto format = dnsdist::logging::LoggingConfiguration::getStructuredLoggingTimeFormat();
if (format == dnsdist::logging::LoggingConfiguration::TimeFormat::ISO8601) {
return "%FT%H:%M:%S%z";
}
return nullptr;
}
}
void logTime(std::ostream& stream)
{
std::array<char, 50> buffer{""};
if (LoggingConfiguration::getStructuredLogging() && LoggingConfiguration::getStructuredLoggingTimeFormat() == LoggingConfiguration::TimeFormat::Numeric) {
struct timeval now{};
gettimeofday(&now, nullptr);
snprintf(buffer.data(), buffer.size(), "%lld.%03ld", static_cast<long long>(now.tv_sec), static_cast<long>(now.tv_usec / 1000));
}
else {
const auto* timeFormat = getTimeFormat();
if (timeFormat == nullptr) {
return;
}
time_t now{0};
time(&now);
struct tm localNow{};
localtime_r(&now, &localNow);
{
// strftime is not thread safe, it can access locale information
static std::mutex mutex;
auto lock = std::lock_guard(mutex);
if (strftime(buffer.data(), buffer.size(), timeFormat, &localNow) == 0) {
buffer[0] = '\0';
}
}
}
if (dnsdist::logging::LoggingConfiguration::getStructuredLogging()) {
stream << "ts=" << std::quoted(buffer.data()) << " ";
}
else {
stream << buffer.data();
}
}
}
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