I’m recently digging into linux io model, and I frequently hear that like windows IOCP, linux has its own aio model implementation: Glibc aio and kernel aio. Question: (1) when people say “linux native aio”, which model is indicated? (2) I hear 2 different terms, “linux aio” and …
Compiling standalone ASIO with Makefile on Linux
I’m trying to compile a small c++ program that captures an image from a camera using libv4l2 and then sends it over UDP to a separate computer using asio. The file structure of the project is: My Makefile for the project is: However, when I try to compile this, my compiler spits on dozens of undefined r…
What is use of struct i2c_device_id if we are already using struct of_device_id?
I was trying to understand a codec driver code on Linux kernel 4.4. The codec is connected to sound card using i2c bus and the codec driver code is written as I2C client. Client’s struct i2c_driver contains both i2c_device_id information and of_device_id information. Now as per my understanding client&#…
(GDB) Breakpoints and Disassemble
I’ve been recently interested in reading books and articles about hacking and I found out that Hacking:The art of exploitation is just a must read title. I am following the basic tutorials on how to work with standard Linux tools and analyze your code (Programming chapter). I am not a beginner in progra…
unexpected result(-wS-wx–T) on file permission with open() function in C
I wrote this program to open a file. Everything was OK until I saw this permission(-wS-wx–T) with ls -lh open.c I compiled the program featly, didn’t take any error or warning. I haven’t ever seen kind of permission. What are ‘S’ and ‘T’ meaning in the file permission…
Move to the end or beginning of the current line in VI when in insert mode
I am not proficient with my knowledge of VI editor and find it troublesome to keep pressing the -> (Right Arrow) key to move to the end of the line While searching on google I found that exiting the insert mode and then pressing the $ key will move the cursor to the end of the line. It works fine,
How to copy files to each user’s space in docker
I am writing a docker file to conduct an evaluation of an R package that I have written. The package is installed inside RStudio server. My docker file inherits from FROM rocker/rstudio. I want the docker file to install the everything (which it does) and create 20 users (user1, user2, …, user20) as tes…
Hide Multiple Excel Worksheets
I am using the Perl module Excel::Writer::XLSX to write an Excel workbook in Linux. I am writing to three separate worksheets and am trying to hide the first two so that only the third worksheet is visible. Perl Code: Instead, using the code below, only the first worksheet tab is being hidden. What am I doing…
Shell script file with multiple commands
I want to make shell script file in windows and linux with multiple commands inside it. E.g run.sh and run.bat with the below commands run.bat or run.sh When I run my run.bat file it only executes first command mvn clean but it do not execute other commands. How to make shell-script file with multiple command…
Download older curl rpm’s [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Closed 6 years ago. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-top…