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#!/bin/bash
#
# To make apache render files ending with .md with strapdown.js
# markdown renderer (http://strapdownjs.com/), add following lines 
# to /etc/apache2/httpd.conf:
#
#    Action markdown /cgi-bin/strapdown.cgi
#    AddHandler markdown .md
#    DirectoryIndex index.html index.md
#

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/*

## Compile

g++ -Wall -std=c++11 -rdynamic -g stack-backtrace.cpp -lbacktrace -o stack-backtrace &&  ./stack-backtrace
clang++ -Wall -std=c++11 -rdynamic -g stack-backtrace.cpp -lbacktrace -o stack-backtrace && ./stack-backtrace

## Output

  Backtrace:

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// clang++ -Wall -std=c++11 -O0 -o test test.cpp && ./test
// g++ -Wall -std=c++11 -O0 -o test test.cpp && ./test

#include <iostream>
#include <vector>
#include <cstdio>

namespace Ns
{

tsaarni

Using ELK stack for offline SSHD log analysis

To start Elasticsearch + Logstash + Kibana execute:

docker-compose up

The container images will be downloaded from docker hub at first run.

Next, import the log file data to logstash

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// clang++ -Wall -std=c++11 -O0 -o scope-exit scope-exit.cpp && ./scope-exit
// g++ -Wall -std=c++11 -O0 -o scope-exit scope-exit.cpp && ./scope-exit

#include <iostream>

template <typename F>
struct ScopeExit
{
   ScopeExit(F f) : f(f) {}
   ~ScopeExit() { f(); }

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#include <boost/exception/diagnostic_information.hpp> 

struct MyException : virtual boost::exception, virtual std::exception
{
   virtual const char* what() const throw() { return boost::diagnostic_information_what(*this); }
};

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Using member function as boost::asio handler

This example demonstrates how to implement boost::asio handler callback as a member functions in a safe way, even while the ASIO timer or socket object is itself also contained in the same object.

Problem

When deleting the object containing both the handler method and ASIO

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Profanity inside Docker container

Building the container image

Clone this repository:

git clone https://gist.github.com/0c6f5f31f874d39e0860c48fd4b575e8.git docker-profanity
cd docker-profanity

and then run following command to build the image:

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*** RSA

# Generate self-signed certificate with RSA 4096 key-pair
openssl req -x509 -nodes -days 3650 -newkey rsa:4096 -keyout rsakey.pem -out rsacert.pem

# print private and public key
openssl rsa -in rsakey.pem -text -noout

# print certificate
openssl x509 -in rsacert.pem -text -noout

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Install CFSSL

https://github.com/cloudflare/cfssl

go get -v -u github.com/cloudflare/cfssl/cmd/cfssl
go get -v -u github.com/cloudflare/cfssl/cmd/...