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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2012-2013 ZeroTier Networks 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/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <time.h>
#include "Constants.hpp"
#include "Logger.hpp"
namespace ZeroTier {
Logger::Logger(const char *p,const char *prefix,unsigned long maxLogSize) :
_path((p) ? p : ""),
_prefix((prefix) ? (std::string(prefix) + " ") : ""),
_maxLogSize(maxLogSize),
_log_m(),
_log((FILE *)0)
{
if (_path.length())
_log = fopen(_path.c_str(),"a");
else _log = stdout;
}
Logger::~Logger()
{
fflush(_log);
if ((_log)&&(_log != stdout)&&(_log != stderr))
fclose(_log);
}
void Logger::log(const char *fmt,...)
{
va_list ap;
char tmp[128];
if (_log) {
Mutex::Lock _l(_log_m);
_rotateIfNeeded();
if (_log) {
time_t now = time(0);
#ifdef __WINDOWS__
ctime_s(tmp,sizeof(tmp),&now);
char *nowstr = tmp;
#else
char *nowstr = ctime_r(&now,tmp);
#endif
for(char *c=nowstr;*c;++c) {
if (*c == '\n')
*c = '\0';
}
if (_prefix.length())
fwrite(_prefix.data(),1,_prefix.length(),_log);
fprintf(_log,"[%s] ",nowstr);
va_start(ap,fmt);
vfprintf(_log,fmt,ap);
va_end(ap);
#ifdef _WIN32
fwrite("\r\n",1,2,_log);
#else
fwrite("\n",1,1,_log);
#endif
fflush(_log);
}
}
}
#ifdef ZT_TRACE
void Logger::trace(const char *module,unsigned int line,const char *fmt,...)
{
va_list ap;
char tmp[128];
if (_log) {
Mutex::Lock _l(_log_m);
_rotateIfNeeded();
if (_log) {
time_t now = time(0);
#ifdef __WINDOWS__
ctime_s(tmp,sizeof(tmp),&now);
char *nowstr = tmp;
#else
char *nowstr = ctime_r(&now,tmp);
#endif
for(char *c=nowstr;*c;++c) {
if (*c == '\n')
*c = '\0';
}
if (_prefix.length())
fwrite(_prefix.data(),1,_prefix.length(),_log);
fprintf(_log,"[%s] TRACE/%s:%u ",nowstr,module,line);
va_start(ap,fmt);
vfprintf(_log,fmt,ap);
va_end(ap);
#ifdef _WIN32
fwrite("\r\n",1,2,_log);
#else
fwrite("\n",1,1,_log);
#endif
fflush(_log);
}
}
}
#endif
void Logger::_rotateIfNeeded()
{
if ((_maxLogSize)&&(_log != stdout)&&(_log != stderr)) {
long pos = ftell(_log);
if (pos > (long)_maxLogSize) {
fclose(_log);
rename(_path.c_str(),std::string(_path).append(".old").c_str());
_log = fopen(_path.c_str(),"w");
}
}
}
} // namespace ZeroTier
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