How do I set the log directory of glog from code

glog documentation
install glog
glog to stdout
glog golang doc
glog debugf
godoc glog

Does anyone know how to set/modify the log dir in the golang source code? I want to set the log dir in the soure code, instead of -log_dir= in the cmdline

This is a hack I have seen lying around: set the flags in code. Also very good for setting log levels from code.

package main

import (


func main() {



>>> hi_b
>>> v4b

How To Use Google Logging Library (glog), Google glog is a library that implements application-level logging. If the Google gflags library isn't installed, you set flags via environment variables, prefixing the Please grep the source code for "DEFINE_" to see a complete list of all flags. How To Use Google Logging Library (glog) (as of ) Introduction. Google glog is a library that implements application-level logging. This library provides logging APIs based on C++-style streams and various helper macros. You can log a message by simply streaming things to LOG(<a particular severity level>), e.g.

The glog package is a dump of the log package used inside Google. Google configures logging using command line flags and that's what the package supports.

You should look to another log package or fork the package if you want to set the directory from code.

can glog write to a specified file name? � Issue #147 � google/glog , I want to write log to a specified file name, is there any parameter or to host and review code, manage projects, and build software together. trouble, first you need to understand that GLOG will create 4 level log files (INFO,� if glog.V(2) { glog.Info("log this") } or glog.V(2).Info("log this") The second form is shorter but the first is cheaper if logging is off because it does not evaluate its arguments. Whether an individual call to V generates a log record depends on the setting of the -v and --vmodule flags; both are off by default.

Variable logDir really exist in glog package It just not exported. So you can change it in source of your instance of glog. It's little hacky, but not hard.

google/glog: C++ implementation of the Google logging , Contribute to google/glog development by creating an account on GitHub. GitHub is home to over 50 million developers working together to host and review code, manage Files. Permalink. Failed to load latest commit information. Type. Name See INSTALL for (generic) installation instructions for C++: basically. If you want to completely customize the file name, then some trouble, first you need to understand that GLOG will create 4 level log files (INFO, WARNING, ERROR, FATAL), and high levels of log files will be written not only written to their lower level than their files, so you should pay attention to distinguish between these 4 files in the

First of all Glog rely on the package Flag. If you will not import it, you will have annoying warning in log message.

If you only need to set parameters one time in initialisation it is very easy.

flag.Set("logtostderr", "true")
glog.Infof("starting main program")

How to install and use GLog – Code Yarns , It makes it real easy for you to add logging to any C++ application. Install: Installing GLog header files and library files is easy: Header file: The� For any system that follows the Filesystem Hierarchy Standard this should be /var/log.I think this is safe to assume for most modern systems. Note that this is for system processes (ie daemons etc), for user processes the common thing to do is just to create the log file as a hidden file in the user's home directory.

Getting Started Quickly With Go Logging, The simplest code that you can use to write logs is the following: package main We need to be careful about what we put on those log files. For example, I wanna keep log files for only 7 days. Then the glog should delete all the log files which last modify time before 7 days.

glog, -log_dir="" Log files will be written to this directory instead of the default temporary directory. Other flags provide aids to debugging. -log_backtrace_at="" When set� A file with the LOG file extension is a Log Data file (sometimes called a logfile) used by all kinds of software and operating systems to keep track of something that has occurred, usually complete with an event detail, date, and time. It could really be used for anything that the application deems appropriate to write down.

third_party/glog/src/src/windows/glog/logging.h - webm , This file is automatically generated from src/glog/ You can log messages the first N times your code executes a line. E.g.. //. // LOG_FIRST_N( INFO, 20) Sets the path of the directory into which to put additional links. // to the log� I installed glog under Windows using VS2015 and CMake. I got the output libraries, headfiles together with glog-config.cmake. It seems that the generated file glog-config.cmake doesn't set these three variables.

  • I was wondering what these getter and setter methods were for. Note that with this method (lacking a documentation) you can also print the value glog.Info("Log level: ", flag.Lookup("v").Value). Thank you very much. I don't think it's a hack. It is the intended use.