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authorMatthias P. Braendli <matthias.braendli@mpb.li>2019-08-13 10:48:49 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2019-08-13 10:48:49 +0200
commitef536ba0e190df286d273ded5ba93f4a2f39b45e (patch)
tree5d45c336e2244e3e59e5ae681dd74df037d809ad /lib/Log.cpp
parent14f69f9c915cf644147a52b803d79ff8f40a4ea1 (diff)
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Pull in files from odr-mmbtools-common
Telnet RC is now single-user only.
Diffstat (limited to 'lib/Log.cpp')
-rw-r--r--lib/Log.cpp194
1 files changed, 194 insertions, 0 deletions
diff --git a/lib/Log.cpp b/lib/Log.cpp
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+/*
+ Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
+ Her Majesty the Queen in Right of Canada (Communications Research
+ Center Canada)
+
+ Copyright (C) 2018
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://www.opendigitalradio.org
+ */
+/*
+ This file is part of the ODR-mmbTools.
+
+ This program 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.
+
+ 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <list>
+#include <cstdarg>
+#include <cinttypes>
+#include <chrono>
+
+#include "Log.h"
+
+using namespace std;
+
+/* etiLog is a singleton used in all parts of the program to output log messages.
+ */
+Logger etiLog;
+
+void Logger::register_backend(std::shared_ptr<LogBackend> backend)
+{
+ backends.push_back(backend);
+}
+
+
+void Logger::log(log_level_t level, const char* fmt, ...)
+{
+ if (level == discard) {
+ return;
+ }
+
+ int size = 100;
+ std::string str;
+ va_list ap;
+ while (1) {
+ str.resize(size);
+ va_start(ap, fmt);
+ int n = vsnprintf((char *)str.c_str(), size, fmt, ap);
+ va_end(ap);
+ if (n > -1 && n < size) {
+ str.resize(n);
+ break;
+ }
+ if (n > -1)
+ size = n + 1;
+ else
+ size *= 2;
+ }
+
+ logstr(level, move(str));
+}
+
+void Logger::logstr(log_level_t level, std::string&& message)
+{
+ if (level == discard) {
+ return;
+ }
+
+ log_message_t m(level, move(message));
+ m_message_queue.push(move(m));
+}
+
+void Logger::io_process()
+{
+ while (1) {
+ log_message_t m;
+ try {
+ m_message_queue.wait_and_pop(m);
+ }
+ catch (const ThreadsafeQueueWakeup&) {
+ break;
+ }
+
+ auto message = m.message;
+
+ /* Remove a potential trailing newline.
+ * It doesn't look good in syslog
+ */
+ if (message[message.length()-1] == '\n') {
+ message.resize(message.length()-1);
+ }
+
+ for (auto &backend : backends) {
+ backend->log(m.level, message);
+ }
+
+ if (m.level != log_level_t::trace) {
+ std::lock_guard<std::mutex> guard(m_cerr_mutex);
+ std::cerr << levels_as_str[m.level] << " " << message << std::endl;
+ }
+ }
+}
+
+
+LogLine Logger::level(log_level_t level)
+{
+ return LogLine(this, level);
+}
+
+LogToFile::LogToFile(const std::string& filename) : name("FILE")
+{
+ FILE* fd = fopen(filename.c_str(), "a");
+ if (fd == nullptr) {
+ fprintf(stderr, "Cannot open log file !");
+ throw std::runtime_error("Cannot open log file !");
+ }
+
+ log_file.reset(fd);
+}
+
+void LogToFile::log(log_level_t level, const std::string& message)
+{
+ if (not (level == log_level_t::trace or level == log_level_t::discard)) {
+ const char* log_level_text[] = {
+ "DEBUG", "INFO", "WARN", "ERROR", "ALERT", "EMERG"};
+
+ // fprintf is thread-safe
+ fprintf(log_file.get(), SYSLOG_IDENT ": %s: %s\n",
+ log_level_text[(size_t)level], message.c_str());
+ fflush(log_file.get());
+ }
+}
+
+void LogToSyslog::log(log_level_t level, const std::string& message)
+{
+ if (not (level == log_level_t::trace or level == log_level_t::discard)) {
+ int syslog_level = LOG_EMERG;
+ switch (level) {
+ case debug: syslog_level = LOG_DEBUG; break;
+ case info: syslog_level = LOG_INFO; break;
+ /* we don't have the notice level */
+ case warn: syslog_level = LOG_WARNING; break;
+ case error: syslog_level = LOG_ERR; break;
+ default: syslog_level = LOG_CRIT; break;
+ case alert: syslog_level = LOG_ALERT; break;
+ case emerg: syslog_level = LOG_EMERG; break;
+ }
+
+ syslog(syslog_level, SYSLOG_IDENT " %s", message.c_str());
+ }
+}
+
+LogTracer::LogTracer(const string& trace_filename) : name("TRACE")
+{
+ etiLog.level(info) << "Setting up TRACE to " << trace_filename;
+
+ FILE* fd = fopen(trace_filename.c_str(), "a");
+ if (fd == nullptr) {
+ fprintf(stderr, "Cannot open trace file !");
+ throw std::runtime_error("Cannot open trace file !");
+ }
+ m_trace_file.reset(fd);
+
+ using namespace std::chrono;
+ auto now = steady_clock::now().time_since_epoch();
+ m_trace_micros_startup = duration_cast<microseconds>(now).count();
+
+ fprintf(m_trace_file.get(),
+ "0,TRACER,startup at %" PRIu64 "\n", m_trace_micros_startup);
+}
+
+void LogTracer::log(log_level_t level, const std::string& message)
+{
+ if (level == log_level_t::trace) {
+ using namespace std::chrono;
+ const auto now = steady_clock::now().time_since_epoch();
+ const auto micros = duration_cast<microseconds>(now).count();
+
+ fprintf(m_trace_file.get(), "%" PRIu64 ",%s\n",
+ micros - m_trace_micros_startup,
+ message.c_str());
+ }
+}