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/*
* Copyright 2009, 2010 Free Software Foundation, Inc.
* Copyright 2010 Kestrel Signal Processing, Inc.
* Copyright 2011, 2012 Range Networks, Inc.
*
*
* This software is distributed under the terms of the GNU Affero Public License.
* See the COPYING file in the main directory for details.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <cstdio>
#include <fstream>
#include <string>
#include <stdarg.h>
#include <sys/time.h> // For gettimeofday
#include "Logger.h"
#include "Threads.h" // pat added
#define MAX_ALARMS 20
using namespace std;
// Switches to enable/disable logging targets
bool gLogToConsole = true;
bool gLogToSyslog = false;
FILE *gLogToFile = NULL;
Mutex gLogToLock;
// Global log level threshold:
int config_log_level;
/**@ The global alarms table. */
//@{
Mutex alarmsLock;
list<string> alarmsList;
void addAlarm(const string&);
//@}
// (pat) If Log messages are printed before the classes in this module are inited
// (which happens when static classes have constructors that do work)
// the OpenBTS just crashes.
// Prevent that by setting sLoggerInited to true when this module is inited.
static bool sLoggerInited = 0;
static struct CheckLoggerInitStatus {
CheckLoggerInitStatus() { sLoggerInited = 1; }
} sCheckloggerInitStatus;
/** Names of the logging levels. */
const char *levelNames[] = {
"EMERG", "ALERT", "CRIT", "ERR", "WARNING", "NOTICE", "INFO", "DEBUG"
};
int numLevels = 8;
int levelStringToInt(const string& name)
{
// Reverse search, since the numerically larger levels are more common.
for (int i=numLevels-1; i>=0; i--) {
if (name == levelNames[i]) return i;
}
// Common substitutions.
if (name=="INFORMATION") return 6;
if (name=="WARN") return 4;
if (name=="ERROR") return 3;
if (name=="CRITICAL") return 2;
if (name=="EMERGENCY") return 0;
// Unknown level.
return -1;
}
static std::string format(const char *fmt, ...)
{
va_list ap;
char buf[300];
va_start(ap,fmt);
int n = vsnprintf(buf,300,fmt,ap);
va_end(ap);
if (n >= (300-4)) { strcpy(&buf[(300-4)],"..."); }
return std::string(buf);
}
const std::string timestr()
{
struct timeval tv;
struct tm tm;
gettimeofday(&tv,NULL);
localtime_r(&tv.tv_sec,&tm);
unsigned tenths = tv.tv_usec / 100000; // Rounding down is ok.
return format(" %02d:%02d:%02d.%1d",tm.tm_hour,tm.tm_min,tm.tm_sec,tenths);
}
std::ostream& operator<<(std::ostream& os, std::ostringstream& ss)
{
return os << ss.str();
}
// copies the alarm list and returns it. list supposed to be small.
list<string> gGetLoggerAlarms()
{
alarmsLock.lock();
list<string> ret;
// excuse the "complexity", but to use std::copy with a list you need
// an insert_iterator - copy technically overwrites, doesn't insert.
insert_iterator< list<string> > ii(ret, ret.begin());
copy(alarmsList.begin(), alarmsList.end(), ii);
alarmsLock.unlock();
return ret;
}
/** Add an alarm to the alarm list. */
void addAlarm(const string& s)
{
alarmsLock.lock();
alarmsList.push_back(s);
while (alarmsList.size() > MAX_ALARMS) alarmsList.pop_front();
alarmsLock.unlock();
}
Log::~Log()
{
if (mDummyInit) return;
// Anything at or above LOG_CRIT is an "alarm".
// Save alarms in the local list and echo them to stderr.
if (mPriority <= LOG_ERR) {
if (sLoggerInited) addAlarm(mStream.str().c_str());
cerr << mStream.str() << endl;
}
// Current logging level was already checked by the macro. So just log.
// Log to syslog
if (gLogToSyslog) {
syslog(mPriority, "%s", mStream.str().c_str());
}
// Log to file and console
if (gLogToConsole||gLogToFile) {
int mlen = mStream.str().size();
int neednl = (mlen==0 || mStream.str()[mlen-1] != '\n');
ScopedLock lock(gLogToLock);
if (gLogToConsole) {
// The COUT() macro prevents messages from stomping each other but adds uninteresting thread numbers,
// so just use std::cout.
std::cout << mStream.str();
if (neednl) std::cout<<"\n";
}
if (gLogToFile) {
fputs(mStream.str().c_str(),gLogToFile);
if (neednl) {fputc('\n',gLogToFile);}
fflush(gLogToFile);
}
}
}
Log::Log(const char* name, const char* level, int facility)
{
mDummyInit = true;
gLogInit(name, level, facility);
}
ostringstream& Log::get()
{
assert(mPriority<numLevels);
mStream << levelNames[mPriority] << ' ';
return mStream;
}
void gLogInit(const char* name, const char* level, int facility, char* fn)
{
// Set the level if one has been specified.
if (level)
config_log_level = levelStringToInt(level);
// Both the transceiver and OpenBTS use this same facility, but only OpenBTS/OpenNodeB may use this log file:
if (!gLogToFile && fn) {
gLogToFile = fopen(fn,"w"); // New log file each time we start.
if (gLogToFile) {
time_t now;
time(&now);
fprintf(gLogToFile,"Starting at %s",ctime(&now));
fflush(gLogToFile);
std::cout << "Logging to file: " << fn << "\n";
}
}
// Open the log connection.
openlog(name,0,facility);
}
// vim: ts=4 sw=4
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