I was reading source code of glibc. In function void *__libc_malloc(size_t bytes): It shows that if the first thread was created, it calls ptmalloc_init(), and links thread_arena with main_arena, and sets __malloc_initialized to true. On the other hand, the second thread was blocked by the following code in p…
Tag: linux
Problem with a Golang webapp and system service
I am trying to create a Golang server using the gin framework on ubuntu. It works fine when it is executed in the terminal after building it with go build and equally works well locally. Systemd I got this error Answer Adding a working directory to the systemd fix this error.
How can capture args with xargs across multiple pipe in bash
I have this command Suppose that argument from first xargs is $1 and it gets subsituted in like helm list –short -n {$1} and $2 is the argument of second Xargs and its gets substituted like but i also want $1 to use like this in last comand is this possible ? output of first xargs second xargs Answer I
Create a symbolic link named long_file pointing to the largest file in the current directory
I know how to create a symbolic link but I don’t kow how to get largetst file in current directory. Please, help me! Answer You can do it with the following command: which breaks down as follows: find /path/to/dir-with-big-file/ -type f -printf “%st%pn” – find files and print %s files …
Cross-Platform Installer paths
I’m writing an installer for a Python app I’m making, and needed to have paths for different file locations. These are what I have so far, and so wondered if these were correct of if I should change any of them (particularly the Linux/macOS ones) I have a path for: the actual binary for the config…
Error while trying to compile an c++ sdl2 program with mingw
Basically, when I’m trying to compile my program for windows on linux, I get such an error: My main function starts like this: My compiling script looks like this: And this is my file structure: Any clues on why can’t I compile it? Answer Oh, okay I was just dumb, didn’t pass the name of mai…
XFCE – keyboard configuration migration
where are the Xfce store keyboard configurations for a migration? I want to prepare the “startup” script to prepare newly installed Linux to match my preference and persistently set up a Czech keyboard for the user who runs it. I try lots of Google and documentation but sadly I can’t find a …
How to use 1GB hugepages in DPDK?
DPDK has two hugepage sizes:2MB hugepages and 1GB hugepages. I run the command below to use the 1GB hugepages: However, when I run the command cat /proc/meminfo: It still seems to use the 2MB hugepages. What should I do to use the 1GB hugepages? Answer The Hugepagesize field of /proc/meminfo is the default hu…
why called function can get arguments of parent-function by va_start()?
I implemented a function with variable arguments below: Then I hope to implement another named “errExit()” based on the function above. I just tried like below.It works as I hoped but I dont’t think it correct. I tried errExit(“hello,%s,%s,%s”, “arg1″,”arg2̶…
how to achieve backward compatibility with missing shared library
I upgrade a program that needs to run on both old and new platform. In the new platform, I have new config so certain functions will not get called in the old platform. However, when I run the program on old platform, it complains missing shared library. What I need is something like “lazyload” or…