In a program, SIGCHLD is blocked from main thread, then thread “THREAD_1” is doing sigwait(), thread “THREAD_2” which forks a child process and kills it, in this thread I called pthread_sigmask(SIG_UNBLOCK, &set, 0) to unblock SIGCHLD before killing the child. But SIGCHLD is still …
Inserting text in vim causes each line to be shifted right
When I copy some text from one opened window (browser and text editor) to vim by pressing Shift + Insert, The text is inserted in a way that each consecutive line is shifted right with progressive amount of tabs. Meaning that second line is shifted by 1 tab, 3rd line is shifted by 2 tabs, 4th line is shifted …
grep the filename using sed
I have the following line I would like to get and change just the (result_0.01) part to a different text which might include numbers. Preferably I would like this to be done using sed. Thank you in advance. Answer what happens here in sed part is: we substitude (s flag at the beginning of sed) we find everyth…
Bash script wait depended commands processes
I am fairly new in bash scripting. I need to use bash script for manage my microservices, so these services need build and deploy(on docker). So I have commands like that : So as you see(a little part of script, i am grouping depended commands in functions),commands need to wait previous depended commands lik…
How do you convert c code into assembly’s hex representation?
Edit: It appears I have a lot more reading to do… Also, for those telling me this is a bad idea, it’s for a buffer overflow exercise. I have a fairly simple C program: I want to turn it into hex assembly code. Think something like: I tried doing: And that gave me a nice long string of hex. But
root user of linux spanning lots of processes of python script uncontrollably
I wrote a python script to work with a message queue and the script was launched by crontab. I removed from crontab but the root user of my linux system keeps launching it every 9 minutes. I’ve rebooted system and restarted cron but this script keeps getting executed. Any idea how to keep it from happen…
Disable variable-length automatic arrays in gcc
I couldn’t disable it even though by using -std=c89 flag. How can I disable it? Answer You can generate an error for variable length arrays using a compiler flag:
CUDA C++: Using a template function which calls a template kernel
I have a class which has a template function. This function calls a template kernel. I’m doing my development in Nsight on a Linux box. In doing this, I encounter the following pair of conflicting requirements: 1 – When implementing a template function, the definition must appear in the *.h (or *.…
Remove .htpasswd Password Protection .(Nginx)
I added an htpasswd.txt to sites-avaiable/default to protect my site: Now that i’m trying to remove it, I can’t get rid of a .htpasswd protection I set up previously. I’ve tried everything from creating .htaccess in the root of my site with satisfy any like this post suggests and this, to de…
use local yum repository created by createrepo in other servers
Is there a way to use the local repository created by createrepo on one redhat box in the other redhat boxes? Answer You just need to expose it over http (or ftp) on that first box. Or you can periodically sync it with rsync.