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//
// Copyright 2012,2014,2016 Ettus Research LLC
//
// 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 <uhd/utils/log.hpp>
#include <uhd/utils/static.hpp>
#include <uhd/utils/paths.hpp>
#include <boost/filesystem.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/thread/locks.hpp>
#include <boost/interprocess/sync/file_lock.hpp>
#include <fstream>
#include <cctype>
namespace fs = boost::filesystem;
namespace pt = boost::posix_time;
namespace ip = boost::interprocess;
/***********************************************************************
* Global resources for the logger
**********************************************************************/
class log_resource_type{
public:
uhd::log::severity_level level;
uhd::log::severity_level file_level;
uhd::log::severity_level console_level;
log_resource_type(void){
//file lock pointer must be null
_file_lock = NULL;
//default to no file logging
this->file_logging = false;
//set the default log level
this->level = uhd::log::off;
this->file_level = uhd::log::off;
this->console_level = uhd::log::off;
//allow override from macro definition
#ifdef UHD_LOG_MIN_LEVEL
this->level = _get_log_level(BOOST_STRINGIZE(UHD_LOG_MIN_LEVEL));
#endif
#if defined(UHD_LOG_FILE_LEVEL) && defined(UHD_LOG_FILE_PATH)
this->file_level = _get_log_level(BOOST_STRINGIZE(UHD_LOG_FILE_LEVEL));
#endif
#ifdef UHD_LOG_CONSOLE_LEVEL
this->console_level = _get_log_level(BOOST_STRINGIZE(UHD_LOG_CONSOLE_LEVEL));
#endif
#ifdef UHD_LOG_FILE
this->log_file_target = BOOST_STRINGIZE(UHD_LOG_FILE);
this->file_logging = true;
#endif
//allow override from environment variables
const char * log_level_env = std::getenv("UHD_LOG_LEVEL");
if (log_level_env != NULL && log_level_env[0] != '\0') this->level = _get_log_level(log_level_env);
const char * log_file_level_env = std::getenv("UHD_LOG_FILE_LEVEL");
if (log_file_level_env != NULL && log_file_level_env[0] != '\0') this->file_level = _get_log_level(log_file_level_env);
const char * log_console_level_env = std::getenv("UHD_LOG_CONSOLE_LEVEL");
if (log_console_level_env != NULL && log_console_level_env[0] != '\0') this->console_level = _get_log_level(log_console_level_env);
const char* log_file_env = std::getenv("UHD_LOG_FILE");
if ((log_file_env != NULL) && (log_file_env[0] != '\0')) {
this->log_file_target = log_file_env;
this->file_logging = true;
}
}
~log_resource_type(void){
if (this->file_logging){
boost::lock_guard<boost::mutex> lock(_mutex);
_file_stream.close();
if (_file_lock != NULL) delete _file_lock;
}
}
void log_to_file(const std::string &log_msg){
if ( this->file_logging ){
boost::lock_guard<boost::mutex> lock(_mutex);
if (_file_lock == NULL){
_file_stream.open(this->log_file_target.c_str(), std::fstream::out | std::fstream::app);
_file_lock = new ip::file_lock(this->log_file_target.c_str());
}
_file_lock->lock();
_file_stream << log_msg << std::flush;
_file_lock->unlock();
}
}
private:
//! set the log level from a string that is either a digit or an enum name
bool file_logging;
std::string log_file_target;
uhd::log::severity_level _get_log_level(const std::string &log_level_str){
if (std::isdigit(log_level_str[0])) {
const uhd::log::severity_level log_level_num =
uhd::log::severity_level(std::stoi(log_level_str));
if (log_level_num >= uhd::log::trace and
log_level_num <= uhd::log::fatal) {
return log_level_num;
}
}
#define if_loglevel_equal(name) \
else if (log_level_str == #name) return uhd::log::name
if_loglevel_equal(trace);
if_loglevel_equal(debug);
if_loglevel_equal(info);
if_loglevel_equal(warning);
if_loglevel_equal(error);
if_loglevel_equal(fatal);
return uhd::log::off;
}
//file stream and lock:
std::ofstream _file_stream;
ip::file_lock *_file_lock;
boost::mutex _mutex;
};
UHD_SINGLETON_FCN(log_resource_type, log_rs);
/***********************************************************************
* The logger object implementation
**********************************************************************/
//! get the relative file path from the host directory
inline std::string path_to_filename(std::string path)
{
return path.substr(path.find_last_of("/\\") + 1);
}
uhd::_log::log::log(
const uhd::log::severity_level verbosity,
const std::string &file,
const unsigned int line,
const std::string &component,
const boost::thread::id id
)
{
_log_it = (verbosity >= log_rs().level);
_log_file =(verbosity >= log_rs().file_level);
_log_console = (verbosity >= log_rs().console_level);
if (_log_it)
{
if (_log_file){
const std::string time = pt::to_simple_string(pt::microsec_clock::local_time());
_file
<< time << ","
<< "0x" << id << ","
<< path_to_filename(file) << ":" << line << ","
<< verbosity << ","
<< component << ","
;
}
#ifndef UHD_LOG_CONSOLE_DISABLE
if (_log_console){
#ifdef UHD_LOG_CONSOLE_TIME
const std::string time = pt::to_simple_string(pt::microsec_clock::local_time());
#endif
_console
#ifdef UHD_LOG_CONSOLE_TIME
<< "[" << time << "] "
#endif
#ifdef UHD_LOG_CONSOLE_THREAD
<< "[0x" << id << "] "
#endif
#ifdef UHD_LOG_CONSOLE_SRC
<< "[" << path_to_filename(file) << ":" << line << "] "
#endif
<< "[" << verbosity << "] "
<< "[" << component << "] "
;
}
#endif
}
}
uhd::_log::log::~log(void)
{
if (not _log_it)
return;
#ifndef UHD_LOG_CONSOLE_DISABLE
if ( _log_console ){
std::clog << _console.str() << _ss.str() << std::endl;
}
#endif
if ( _log_file){
_file << _ss.str() << std::endl;
try{
log_rs().log_to_file(_file.str());
}
catch(const std::exception &e){
/*!
* Critical behavior below.
* The following steps must happen in order to avoid a lock-up condition.
* This is because the message facility will call into the logging facility.
* Therefore we must disable the logger (level = never) before messaging.
*/
log_rs().level = uhd::log::off;
std::cerr
<< "Logging failed: " << e.what() << std::endl
<< "Logging has been disabled for this process" << std::endl
;
}
}
}
void
uhd::_log::log::set_log_level(uhd::log::severity_level level){
log_rs().level = level;
}
void
uhd::_log::log::set_console_level(uhd::log::severity_level level){
log_rs().console_level = level;
}
void
uhd::_log::log::set_file_level(uhd::log::severity_level level){
log_rs().file_level = level;
}
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