Is that possible with C to wait until the popen subprocess is finished? I have a script launched by a C daemon which will connect to a wifi network when an external signal is triggered. Here is my code for now : However, I’m not waiting for the subprocess to finish so when I’m closing the pipe, the ressource is
Tag: c++
Why compiled code creates corrupted file in windows in linux works fine [closed]
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 5 years ago. Improve this question
Raw clone system call not working correctly
I’m trying to use the raw clone system call to avoid having to refactor the pid 0 code into a function. Linux requires stacks to by 16 bytes, additionally, libc reserves 16 bits presumably to store ptid and ctid. The code below creates an aligned stack then exits from the child. After waiting for the child cloned by libc’s wrapper
shmat() Permission denied even i have read access
In my simple code: I already have read access, but I got “shmat: Permission denied”. Do I have permission to write? Answer From man shmat: If SHM_RDONLY is specified in shmflg, the segment is attached for reading and the process must have read permission for the segment. Otherwise the segment is attached for read and write and the process must
Who can send to a socket bound to INADDR_LOOPBACK?
I’m somewhat new to socket programming, and am confused about the concept of binding a socket to the address INADDR_LOOPBACK, or 127.0.0.1. If I’m writing server code to listen for messages on a specific port, and I bind a socket to an address as in the following code exerpt… …my question is: who is able to send to this socket?
.Net Core ignoring Environment Variable DOTNET_SKIP_FIRST_TIME_EXPERIENCE
It seems apparent that you can save some time doing .NET Core builds by setting Environment variable DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true. I am finding this is not the case on CentOS 7 and Debian Jessie Linux distros. I have a Jenkins slave Docker image, used by Jenkins to build .NET Core services, my image tag is jenkins.slave.dotnet.image. The Jenkins Docker Plugin, uses jenkins.slave.dotnet.image
Working with multiple displays – will XOpenDisplay(NULL) sometimes fail to get current display of a window?
I have an *.SO library, which when called from an application, removes window decorations from the specified window. Here is my code: My question – with my current code set up – will it sometimes fail to remove window decorations depending on which display the window is currently displayed on? My impression is that XOpenDisplay(NULL) will return the default or
What’s the difference between XOpenDisplay(0) and XOpenDisplay(NULL)?
What’s the difference between Display XOpenDisplay(0) and XOpenDisplay(NULL)? In the above code I wrote an *.SO library for Linux that when called removes the window decorations of the specified window. In the line of that code which reads: I have tried replacing that with: And both usages seem to successfully remove the window decorations on the Ubuntu 16.04 LTS laptop
How to Mock Linux System Calls in C
When writing C modules that use linux system calls, what is the best practice to mock those calls in order to test the module? Are there maybe any libraries that offer mocks for linux system calls? “my-module.h” – The interface description “my-module.c” – The module to test. “my-module.test.cpp” – The unit test the way I would expect this to work
SonarQube MsBuild scanner on linux build agent
We build or dotnet core 1.1 projects on our own linux build agents in docker. (https://github.com/Microsoft/vsts-agent-docker) We would like to use Sonar to analyze our C# code. But it seems that the SonarQube MsBuild Scanner can’t run in linux environment. Does anybody know a workaround for this. We don’t really want to use Windows agents just to do the code