To have my .cpp and .h files a little bit sorted up pending on their responsibilitie I decided to put them into seperate folders I used the following structure: root | -CMakeLists.txt [rootCmakeList] src | -main.cpp …….| ……. math …….| …….-CMakeLists.txt[mathCmak…
Tag: c++
How to stop the repetition of inotify result?
In this code, I am trying to monitor two paths at the same time. I used while(1) for this purpose. But the problem that I am facing is that whenever I run the code, it gives me the same result two times like this. Giving result Expected result I debugged the code. After breaking the main function and stepping…
How to capture and modify mouse events in linux?
I want to write a program that changes the behavior of mouse when certain key is pressed. But I am not quite familiar with event mechanisms in linux. My guess is that I need to filter through the “event queue” looking for “key press” and “mouse press” events, and somehow mo…
How to generate an exectutable file with netbeans 8.2 in linux
I installed NetBeans 8.2 (but the same is for any version of NetBeans C/C++) in a linux OS (Linux Mint Ulyssa, which based to what i know is ubuntu core. I can run successfully with the expected result a project (simple “hello world”) but can’t in the build folder of the project i can’…
Why cannot I read data from a serial port?
I have faced the following problem: I wish to read data comming to my serial port on linux. Data are send from an external device with standard serial settings. I’m sure that the external device sends them, that has been already checked. However, on linux all i can read is an empty byte. What am I setti…
Can not achieve real time SCHED_FIFO thread within process
Good day everyone ! I am trying to get a 2nd thread (the serial thread) to run as near real time as possible. Within my 2nd spawned serial thread I select() with timeout of 3 mS on a serial port. I also get real time before select() … and then after to get select() delta time. Problem is that sometimes
test case to make os.getuid() and os.geteuid() return different results
I got the same uid and euid even though the file belongs to root and has the suid bit set. Does anybody know how to make a test case to let getuid() and geteuid() return different results? Thanks. EDIT: I tried a C program. uid and euid are still the same. Answer Typo! should read Then the C program will
Signals – SIGUSR1 class exercise
I got this as a class exercise. I had to analyze the output without running it and I figured that the output should be num=4. But actually the output of this code after running it is: I’ll be glad to know what am I missing? Answer This is an interesting question. So what’s happening is that a sign…
How to configure systemd *.service using XML file configuration
I’m making a cross-platform background process. For Windows, I have a XML configuration file, which has a service name, load type etc. On windows, program during execution just parses this file and creates the service, easy. Linux, on other hand, has this *.service config file, which doesn’t allow…
Why doesn’t defining `__cxa_throw` cause a link error?
Why doesn’t the following C++ program have a link conflict with the system-provided __cxa_throw ? Is there something magical about that symbol? For a normal function this would be an ODR violation wouldn’t it? Answer As @Igor pointed out, you need to add extern “C” to prevent name mang…