std::thread vs pthread: C++ Threading Interface Comparison

This one looks obvious… until it isn’t 👇 int i = -3; unsigned int j = 5; printf("%d\n", i < j); What would you expect this to print? Most people would say 1 (true). But the actual output is: 0 So what’s going on here? It comes down to how C handles comparisons between signed and unsigned integers. When i (which is -3) is compared with an unsigned value, it doesn’t stay negative. Instead, it gets implicitly converted to an unsigned integer. That transformation turns -3 into a very large positive number (on a 32-bit system, it becomes 4294967293). So the comparison the compiler actually performs is: 4294967293 < 5 → false Why this matters: This kind of implicit conversion is subtle and easy to miss, but it can introduce serious bugs — especially in: • Embedded systems • Kernel / low-level code • Boundary checks and loop conditions It’s one of those cases where the code looks right, compiles fine, and still behaves unexpectedly. Have you run into bugs caused by signed vs unsigned mismatches? #cprogramming #embeddedc #systemsprogramming #lowlevel #debugging #codingpitfalls #softwareengineering #linux #cplusplus #techinsights

🧠 I worked some time ago on building a minimalist Unix-like shell in Rust — a hands-on way to explore system-level programming. Instead of relying on existing shells or external binaries, the objective was to implement core shell functionality from scratch, focusing on process execution, file system operations, and command parsing. Key features: • Interactive shell loop with a custom prompt • Implementation of core commands: cd, ls, pwd, cat, cp, rm, mv, mkdir, echo, exit • Command parsing and execution flow • Robust error handling for invalid input • Graceful exit handling (EOF) What made this project valuable: Working directly with low-level concepts provided a clearer understanding of how shells manage processes and interact with the filesystem — while applying Rust’s safety model in a real-world context. This experience strengthened my foundation in system programming and gave me practical insight into how Unix-like environments operate under the hood. 🤝 Built in collaboration with mohammed jebbari, Ahmed jebbari, ABDELMOUNAIM JEMI #Rust #Linux #SystemsProgramming #Backend #CLI #Shell #LowLevel

Day 21 of #90DaysOfDevOps - Built My Own Shell Scripting Cheat Sheet! Today I created my own Shell Scripting Cheat Sheet 📘 🔧 What I did: Covered basics, loops, functions, and conditions Added commands like grep, awk, sed Included useful real-world one-liners 📚 What I learned: Writing notes improves understanding Shell scripting is powerful for automation One-liners can save a lot of time Checkout my work: https://lnkd.in/gPN_j_F6 #90DaysOfDevOps #DevOpsKaJosh #TrainWithShubham #ShellScripting #Linux #DevOps #Automation #Bash #Scripting #LearnInPublic #CloudComputing #SysAdmin #DeveloperJourney #TechLearning #Programming

What really happens when you compile a C program using GCC? Most of us just run: 👉 gcc main.c -o main But behind this single command… there are 4 powerful stages working step by step 🔹 Preprocessing Removes comments, expands macros, and handles header files. 🔹 Compilation Converts high-level C code into assembly instructions. 🔹 Assembly Transforms assembly into machine-level object code. 🔹 Linking Combines object files and libraries to create the final executable. From ".c" → ".i" → ".s" → ".o" → executable That’s the real journey of your code! Understanding these stages helps in: ✔ Debugging errors ✔ Optimizing performance ✔ Writing better embedded code #EmbeddedSystems #GCC #Linux Toolchain GNU Project Compiler

No more chasing 'Exception' in aging logs. The terminal just handed you instant context. 🔥 `time grep -R 'Exception' /var/log 2>/dev/null` Time = duration, grep -R = recursive search, 'Exception' = literal, /var/log = log root, 2>/dev/null = hide errors. You're debugging a flaky service at 2AM. Run this on the prod box to surface every exception with timestamps, in one go. One oneliner, instant context, faster triage. 🔥 What command would you pair this with? Drop it below. #linux #terminal #bash #commandline #devops #sysadmin #programming #softwareengineering #productivity #loganalysis #opensource #troubleshooting #buildinpublic #learntocode

One glance, instant truth about a backup's footprint. Here's a one-liner that shows name, size, and mtime in one go 🔥 `stat -c '%n %s bytes %y' backup.tar.gz` In -c, format string. %n = name, %s = size in bytes, %y = last modification time. You're auditing a nightly backup; you need to confirm it's the right file, the size matches, and the timestamp is fresh. This prints a single line you can paste into notes or tickets ⚡ The terminal doesn't bluff: exact, fast, repeatable checks. Try it in your backup workflow and drop your output in the comments. #linux #terminal #oneliner #filesystem #stat #devops #sysadmin #programming #softwareengineering #opensource #productivity #scripting #backup #datamanagement #buildinpublic

Me before today: "Yeah, I know what ThreadPool is... theoretically." Me after today: Actually implements background workers, fixes race conditions with locks, and makes code run 3x faster. The "Aha!" moment: running multiple tasks simultaneously vs. one by one and watching the execution time drop from 6 seconds to 2 seconds.  Level 3 task with Codveda done! #CodvedaAchievements! Finally put those OS theory concepts (Linux daemons, who? 😂) into real C# code. Biggest wins: Async/await = non-blocking magic ThreadPool = reusing workers like a boss lock = stopping threads from fighting over data Simulated daemons in Windows (feeling powerful) Theory → Practice = Growth 📈 Anyone else remember their first "aha" moment with async programming? #Codveda #CodvedaProjects #CSharp #NeverStopLearning #threading

C++ is often associated with performance-critical applications, but its true strength lies in how deeply it connects you to the system. From system programming and operating systems to high-performance applications, C++ gives you control that few languages can match. To dive deeper into this, I recently built a custom Unix shell from scratch — and the experience was both challenging and rewarding. What my shell can do: ->Display a dynamic prompt and read user input ->Parse commands and arguments ->Execute standard programs like ls, cat, grep ->Handle built-in commands such as cd, exit, and help ->Support piping (ls | grep .cpp) Gracefully handle interrupts like Ctrl + C Example interactions: help pwd ls ls -la cd /tmp pwd echo hello world ls | grep myshell exit What I learned: ->How processes are created and managed (fork, exec) ->Inter-process communication using pipes ->Signal handling and making programs robust ->Parsing and interpreting user input at a low level Although it is a very small project, but it made me appreciate how tools we use daily (like the terminal) actually work behind the scenes. It’s fascinating how much control C++ provides when working close to the system. If you're learning C++, I highly recommend building something like this — it's one of the best ways to truly understand system-level programming. If you want to check out what I made: https://lnkd.in/gnfK3EMv #CPlusPlus #SystemProgramming #Unix #Linux #SoftwareEngineering #LearningByDoing #Projects

If you include the programming done by Agents In their response to your prayers What is the most popular language? Not Python Not Typescript Not Java or C# lol Not M6800 Assembler Although that would be a good answer, I grant you that And Not the Others What then pray tell! It is Windows Powershell Yes, Windows Powershell Why? Because in every project Regardless of your role Regardless of what you have installed Regardless of the setup It's there Never gonna give you up Never gonna let you down Never gonna run around and desert you Never gonna make you cry Never gonna say goodbye Never gonna tell a lie and hurt you

What really happens when you compile a C program using GCC? Most of us just run: 👉 gcc main.c -o main But behind this single command… there are 4 powerful stages working step by step 🔹 Preprocessing Removes comments, expands macros, and handles header files. 🔹 Compilation Converts high-level C code into assembly instructions. 🔹 Assembly Transforms assembly into machine-level object code. 🔹 Linking Combines object files and libraries to create the final executable. From ".c" → ".i" → ".s" → ".o" → executable That’s the real journey of your code! Understanding these stages helps in: ✔ Debugging errors ✔ Optimizing performance ✔ Writing better embedded code #EmbeddedSystems #GCC #Linux #Toolchain #GNU #Project #Compiler #embedded #embeddedsystems #embeddedapplications #embeddedprogramming #embeddedsystem #EmbeddedSoftware #EngineeringMindset #CareerDevelopment #embeddedengineering #testing #coding #engineering #engineer #learning #safety #standards #bootloader