SNMP (simple network management protocol) is the way to discover information about remote device or to monitor such device using agentless technique. The agentless approach means that no additional custom spy software is installed on target device. Anyware snmp or WMI are detective features, but usually they are part of operating system. Here is example… Read More »
If you have Java or .Net programming background you used to be familiar with exception which generated in runtime if something is going wrong with code execution. Linux C does not provide direct support to runtime error handling or exception handling. Usually code developer has to check return values from the functions. Generally C function… Read More »
Calling conventions are a standardized methods for c++ compilers how to pass parameters to called function. MS Visual Studio gives possibility to use four of them: cdecl, fastcall, stdcall and vectorcall. The specific of every calling convention is hidden in function prolog and not visible for high level language programmer. This article makes an attempt… Read More »
Do you know what does it mean when some tool shows percentage of CPU usage, for example 60%? Basically this indicates that during some timing interval 60% of time processor spent on execution of some software code and 40% did nothing or was in idle state. Usually CPU timing is divided into 3 main categories:… Read More »
The title of this post looks ridiculous, usually high CPU usage is a problem that slows down your computer and people are fighting to reduce CPU usage. However in my particular case I was working on CPU monitoring code and I need some tool that makes CPU consumption higher. So I created simple C# console… Read More »
Microsoft Windows supports registered custom protocols additionally to the common ones such as http, https, ftp, mailto and so on. To register an application to handle a particular URI scheme, new key, along with the appropriate subkeys and values should be added to the Windows registry. The new key The may be added to HKEY_LOCAL_MACHINE\Software\Classes… Read More »
The sysinfo system call returns a lot of useful system statistic data: memory usage, number of currently running processes, seconds since last boot. The only argument used by sysinfo is a pointer to a sysinfo structure. The first member of sysinfo structure is uptime which contains number of seconds since last reboot. For more details… Read More »
Recently it was needed to convert UTC time string to local computer time string in C++ code. After analyzing several examples from stackoverflow and other resources I implemented this one. It is short application free from explicitely specified time zone. It is not extremely sophisticated at all. I am keeping it here mainly for my… Read More »
This is the first my post in 2018. The main goal of this post is to check how javascript code embedded into WP post works. The javascript code which is used in this post may be downloaded from here. It is pure javascript impementation without jQuery or other libraries. The purpose of the code is… Read More »
Everything has been started by someone. It is related also to any application executed in operating system, except system itself. If you start notepad from command prompt the parent process of notepad process is command prompt. Currently most of the people find parent process using WMI query. For example: C:\projects>wmic process get processid,parentprocessid,name | findstr… Read More »