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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.
*/
#pragma once
#include <string>
#include <ctime>
#include <iostream>
#include <sstream>
#include <syslog.h>
#include <pthread.h>
#include "namespaces.hh"
#include "dnsname.hh"
#include "iputils.hh"
//! The Logger class can be used to log messages in various ways.
class Logger
{
public:
Logger(const string &, int facility=LOG_DAEMON); //!< pass the identification you wish to appear in the log
//! The urgency of a log message
enum Urgency {All=32767,Alert=LOG_ALERT, Critical=LOG_CRIT, Error=LOG_ERR, Warning=LOG_WARNING,
Notice=LOG_NOTICE,Info=LOG_INFO, Debug=LOG_DEBUG, None=-1};
/** Log a message.
\param msg Message you wish to log
\param u Urgency of the message you wish to log
*/
void log(const string &msg, Urgency u=Notice);
void setFacility(int f){d_facility=f;open();} //!< Choose logging facility
void setFlag(int f){flags|=f;open();} //!< set a syslog flag
void setName(const string &);
//! set lower limit of urgency needed for console display. Messages of this urgency, and higher, will be displayed
void toConsole(Urgency);
void setLoglevel( Urgency );
void disableSyslog(bool d) {
d_disableSyslog = d;
}
void setTimestamps(bool t) {
d_timestamps = t;
}
//! Log to a file.
void toFile( const string & filename );
void resetFlags(){flags=0;open();} //!< zero the flags
/** Use this to stream to your log, like this:
\code
L<<"This is an informational message"<<endl; // logged at default loglevel (Info)
L<<Logger::Warning<<"Out of diskspace"<<endl; // Logged as a warning
L<<"This is an informational message"<<endl; // logged AGAIN at default loglevel (Info)
\endcode
*/
Logger& operator<<(const char *s);
Logger& operator<<(const string &s); //!< log a string
Logger& operator<<(int); //!< log an int
Logger& operator<<(double); //!< log a double
Logger& operator<<(unsigned int); //!< log an unsigned int
Logger& operator<<(long); //!< log an unsigned int
Logger& operator<<(unsigned long); //!< log an unsigned int
Logger& operator<<(unsigned long long); //!< log an unsigned 64 bit int
Logger& operator<<(const DNSName&);
Logger& operator<<(const ComboAddress&); //!< log an address
Logger& operator<<(Urgency); //!< set the urgency, << style
Logger& operator<<(std::ostream & (&)(std::ostream &)); //!< this is to recognise the endl, and to commit the log
private:
struct PerThread
{
PerThread()
{
d_urgency=Info;
}
string d_output;
Urgency d_urgency;
};
static void initKey();
static void perThreadDestructor(void *);
PerThread* getPerThread();
void open();
string name;
int flags;
int d_facility;
Urgency d_loglevel;
Urgency consoleUrgency;
bool opened;
bool d_disableSyslog;
bool d_timestamps{true};
static pthread_once_t s_once;
static pthread_key_t s_loggerKey;
};
extern Logger &theL(const string &pname="");
#ifdef VERBOSELOG
#define DLOG(x) x
#else
#define DLOG(x) ((void)0)
#endif
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