I'm trying to use the signaling mechanism of UNIX to do some processing. To test out this functionality, I wrote the following code: #include <stdio.h> #include <signal.h> #include <stdlib.h> #include <unistd.h> #include <sys/wait.h> void handler(int sig) { printf("Received %d signal…
I have come across the command line wc < f1 f2 and it's not clear for me what is happening under the hood: $ echo -n 'a' > f1 $ wc f1 0 1 1 f1 $ echo -n 'bb'…
I'm trying to write a wrapper over Docker to propagate signals and standard output in a sensible way. First, Docker doesn't handle SIGPIPE nicely: $ docker run --rm ubuntu yes | head y y y y y y y y…
I need to make diff ignore the case of my inputs. Both inputs contain German umlauts like ä and Ä. Option -i successfully makes diff ignore the case of my input for other characters like a and A, but not…
I have few files under the current directory, ./a.txt ./b.txt ./dir1/c.txt ./dir1/d.txt When I execute find . -path './dir1' -prune -o -name "*.txt", as expected, it excludes everything under 'dir1' and prints, ./a.txt ./b.txt ./dir1 now if I switch the…
I have a bash script: #! usr/bin/env bash # test bash script to call python scripts cd ~/python for ((i = 1; i <= 2; i++)); do python3 test_0$i.py; done cd ~/bash that pulls test_0x.py files from the python directory…
Below is the code I'm compiling: #include <stdio.h> void main() { printf("Hello%cWorldn", 0); } Below is the compiler output: HelloWorld Bing Chat-GPT response:start Below is the same output by Bing chat-gpt in creative mode Copilot: The output of printf("Hello%cWorldn", 0)…
4 years ago, I using apt-cyg can install Python2.7.x directly, successfully, without any error But now, I can't find Python2 in cygwin list so I try to through complipe source on cygwin, and get failed I also try to through…
Reading The Unix Programming Environment by Brian W. Kernighan and Rob Pike. Working on an exercise, where one should find all palindromes in a wordlist using grep -E. The most concise solution I've been able to find online and understand…
I am new to Docker. I want to containerise a small environment so that I can run executables, but I am stuck because I can't even get an executable to run. My folder structure looks like this: example/ |-Dockerfile |-hello_world…