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all: | ||
$(CXX) ../../src/easylogging++.cc main.cpp -o logrotate-sample -DELPP_DEBUG_INFO --std=c++11 | ||
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#include "../../src/easylogging++.h" | ||
#include <stdio.h> | ||
#include <iostream> | ||
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INITIALIZE_EASYLOGGINGPP | ||
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/* | ||
* Send SIGHUP to the application and log is | ||
* reopended | ||
* | ||
* Ex: | ||
* $ ls -l logfile.log | ||
* -rw-r--r-- 1 el staff 200 Dec 8 10:29 logfile.log | ||
* $ rm logfile.log | ||
* $ kill -SIGHUP $(pgrep logrotate-sample) | ||
* $ ls -l logfile.log | ||
* -rw-r--r-- 1 el staff 0 Dec 8 10:33 logfile.log | ||
* | ||
* */ | ||
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#define loggerName "rotate-logger" | ||
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void configure_logger() | ||
{ | ||
el::Configurations logConf; | ||
logConf.setToDefault(); | ||
logConf.setGlobally(el::ConfigurationType::ToStandardOutput, | ||
"false"); | ||
logConf.setGlobally(el::ConfigurationType::ToFile, "true"); | ||
logConf.setGlobally(el::ConfigurationType::Filename, "logfile.log"); | ||
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logConf.set(el::Level::Debug, el::ConfigurationType::Enabled, "true"); | ||
logConf.set(el::Level::Debug, | ||
el::ConfigurationType::Format, | ||
"%datetime %level %msg"); | ||
el::Logger* logger = el::Loggers::getLogger(loggerName); | ||
el::Loggers::reconfigureLogger(logger, logConf); | ||
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} | ||
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void handler_hup(int signal) | ||
{ | ||
LOG(INFO) << "SIGHUP received - reconfigure logger"; | ||
el::Logger* logger = el::Loggers::getLogger(loggerName); | ||
logger->reconfigure(); | ||
} | ||
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void handler_usr1(int signal) | ||
{ | ||
LOG(INFO) << "SIGUSR1 received - unregister logger"; | ||
el::Loggers::unregisterLogger(loggerName); | ||
} | ||
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int main() | ||
{ | ||
std::signal(SIGHUP, handler_hup); | ||
std::signal(SIGUSR1, handler_usr1); | ||
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LOG(INFO) << "Configuring logger"; | ||
configure_logger(); | ||
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char c; | ||
c = getchar(); | ||
CLOG(DEBUG, loggerName) << "My logger"; | ||
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while ((c = getchar()) != 'q') | ||
{ | ||
CLOG(DEBUG, loggerName) << "My logger"; | ||
} | ||
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std::cout << "Unregistred my logger\n"; | ||
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return 0; | ||
} | ||
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