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Handling Standard Signals #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> void signal_handler(int sig_num) { if (sig_num == SIGINT) { printf("Ctrl+C signal received\n"); } } int main(void) { // Set SIGINT to be ignored if (signal(SIGINT, SIG_IGN) == SIG_E ...

Inter-Process Communication (IPC) enables different processes to exchange data and coordinate operations within an operating system. Below are common IPC mechanisms along with implementation examples for both Windows and Linux platforms. Fundamentals Pipe: A half-duplex communication channel typical used between related processes like parent-c ...

Inspecting Process Memory Usage Using top PID – Process ID USER – Owner PR – Priority (lower = higher) NI – Nice value VIRT – Virtual memory RES – Physical memory SHR – Shared memory S – State (S=sleep, R=run, Z=zombie, N=negative nice) %CPU – CPU usage %MEM – Physical memory ratio TIME+ – Cumulative CPU time COMMAND – Execu ...

Basic Signal Handling #include <signal.h> #include <unistd.h> #include <stdio.h> void signal_handler(int signum) { if (signum == SIGINT) { printf("User pressed CTRL + C\n"); } } int main() { // Capture SIGINT signal if (signal(SIGINT, signal_handler) == SIG_ERR) { perror("signal ...

Understanding IPC Objects System V IPC provides three main inter-process communication mechanisms known as IPC objects: message queues, shared memory, and semaphore arrays. These objects exist in kernel space and are globally accessible through unique identifiers, enabling communication between unrelated processes. IPC objects persist in the sy ...

Linux provides multiple mechanisms for processes to exchange data and coordinate execution. These range from simple notifications to complex shared data structures, each optimized for specific use cases regarding speed, relationship between processes, and data volume. Signal-Based Notification Signals represent the asynchronous communication la ...

The CEF3 framwork operates using a multi-process architecture where the Browser and Renderer live in separate address spaces. While the Browser process typically aligns with the application's main window thread, the Renderer runs independently. Both processes maintain their own instances of browser and frame objects. Traditionally, interacting ...

Signal Handlign Examples 1. Capturing SIGINT This program demonstrates capturing the SIGINT signal (Ctrl+C) with a custom handler. #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> void sigint_handler(int sig_num) { if (sig_num == SIGINT) { printf("Ctrl+C was pressed.\n&quot ...

Underlying Architecture and IPC Mechanics ContentProvider acts as a standardized abstraction layer for exposing application datasets to external processes. Instead of handling raw filesystem I/O or direct database queries from outside, developers encapsulate their storage mechanisms within this component. This design enables secure, permisssion ...

ServiceManager Initialization Flow When the system boots, the init process parses init.rc to launch the servicemanager. The startup sequence invokes the main() functon in main.cpp, which performs four critical operations: Open the /dev/binder device node Map the binder device's memory space into the ServiceManager process address space Registe ...