pamiętnik programisty

There are many articles describing how to setup GMail as a relayhost in Postfix mail server. Most of them involve creating local CA certificate and generation of client certificate. There is absolutely no need to! Just think, how GMail would be able to validate your own certificate created by your own CA available only on [...]

Today I used git cherry-pick command for the first time, and I am really impressed. In my current project I’ve few branches, just for fixing/delopment. There are also a few common files like documentation, TODO – simple text files. Sometimes I came up with a genius idea and I want to put it in TODO [...]

AwesomeWM is so called „tiling window manager”. It aranges windows using certain policy. Usually windows are organized in a such way that none of them overlapped another one. Most of the commands can be invoked directly from keybord, there is no need to use a mouse at all. Screen is organized into tags, on each [...]

Funkcja scanf z biblioteki standardowej C umożliwia odczyt i parsowanie danych z stdin zgodnie z określonym formatem. Większość modyfikatorów jest opisana na stronie cppreference, która nomen omen pojawia się jako pierwsza po wpisaniu „scanf” w wyszukiwarce. Jak się jednak okazuje nie są to wszystkie dostępne modyfikatory. Brakuje jednego istotnego, który umożliwia np. czytanie standardowego wejścia [...]

My BSc Thesis is to implement steganography algorithm that use VoIP packets as a transport. The main aim is to modify delay of RTP packets without noticeable impact on transmission quality. I create hidden channel by sending two packets that average delay is 20ms. For example if we send 1 packet 10ms after previous and [...]