What is Linux Out-Of-Memory OOM Killer
Major distribution kernels set the default value of /proc/sys/vm/overcommit_memory to zero, which means that processes can request … Read more
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Avoid a process from being killed in case of Out of Memory
In our previous post, we understood “What is Out of Memory Killer ?” In this post, we … Read more
How Android System Properties Work Across Partitions
Android system properties are a system-wide string key/value mechanism, but they are not an unrestricted global preferences store. Reads use shared property areas; writes are validated by init’s property service and SELinux policy. Modern cross-partition contracts should use generated typed Sysprop APIs.
Insmod: ERROR: could not insert module hello.ko
We tried to write a simple class driver framework which will create a directory in /sys/class, we … Read more
C program to print Hex values of characters in string
Following program prints the hexadecimal values of all the characters in any string. Currently we have used … Read more
Avoid zombie process in Linux
Zombie process is the process which dies/finishes immediately and whose parent didn’t cares to handle the status … Read more
Create process in Linux using fork system call
Below is simple process creation program using fork system call, fork return child’s process Id in main/parent … Read more
Use Splint for C Analysis—and Know When to Move On
Splint can still expose useful C mistakes through annotations and strict checking, but its last upstream release is from 2007. Use it for legacy compatibility or learning—not as the only security control—and pair it with current compilers, path-sensitive analyzers, sanitizers, tests, and human review.
Use Valgrind to find memory leaks
Valgrind is an instrumentation framework for building dynamic analysis tools. There are Valgrind tools that can automatically … Read more
Add AdSense Auto Ads to AMP and WordPress Safely
AMP pages require AMP-specific AdSense code. Load the amp-auto-ads component once in the document head and place the publisher element immediately after the opening body tag—then validate the generated AMP page, consent flow, ads.txt, and real performance rather than editing theme files blindly.
XML file which can be used for rss feed for website
If you want to create a Email subscription using google Feedburner, we will need to have rss.xml … Read more
Canonical URLs: Choose One Version Without Hiding Content
A canonical URL is the representative address search engines select for duplicate or very similar pages. Your canonical annotation is a strong preference—not an instruction—so redirects, internal links, sitemaps, hreflang, indexability, and page content must tell the same story.
Send and Receive (Transfer) integer over socket using C program
Following the simple example which shows how we can send and receive an integer over a socket. … Read more
Build an Android AAR Library That Is Ready to Share
Creating an Android library module is the easy click. Making its AAR safe for another app requires a deliberate API, resource and manifest hygiene, consumer shrinker rules, compatibility metadata, tests, and a distribution path that preserves dependencies.
Connect Android Library Modules with Gradle
A library module can depend on another module with one Gradle project dependency. The important design choice is whether the dependency remains an implementation detail or becomes part of your public API—and how that relationship survives publication.
What is m4 and How to Fix: “m4: command not found” error
If you have installed fresh Ubuntu on your development machine and tried to compile some opensource source … Read more
Add a Local AAR Dependency to an Android Project
A precompiled AAR can be linked directly from an app module, but the file carries no Maven dependency metadata. Here is the clean Gradle setup, plus the checks that prevent missing classes, resource conflicts, native ABI surprises, and release-only failures.
Display WordPress Categories on home page of website
If we have a website which is largely text based, something like this website which shows mostly … Read more
Fix “Invoke-customs” Android min-api 26 Build Error
This dex error usually means a module or dependency emits Java 8 invocation bytecode without compatible desugaring. First configure the module correctly; if the failing code calls MethodHandle.invoke, use the API-26-safe path instead of masking the problem.
Solved : fatal error: pcap.h: No such file or directory
If you are writing some packet sniffing code using libpcap on Ubuntu Linux, there are higher chances … Read more
Check if its tag page or category page in WordPress
As we have seen in our previous post “How to display WordPress Categories on home page of … Read more
Adb shell getprop
As we have seen in our another post “commands to Identify Product Model, Serial Number ( Device … Read more
Center views in LinearLayout and RelativeLayout
Recently while developing one of our application, we wanted to have center aligned buttons, while in one … Read more
Keep Android Immersive Mode After a PopupMenu
A PopupMenu temporarily owns window focus, so Android may reveal system bars. Use the current WindowInsets controller, track whether fullscreen remains desired, and restore bars only after focus returns or the popup is dismissed—without fighting system gestures or accessibility.