eswaraprasath802/learn-linux-internals-through-programming

Purpose and Entry Points

This is a C systems-programming repository centered on small, standalone demonstrations of OS concepts: process creation, threads, synchronization, IPC, scheduling, memory allocation, device access, signals/alarms, timer interrupts, and a tiny filesystem. There is no README describing a unified application. main.c is the likely general entry point, while many concept files may be independently compiled or contain their own demonstrations.

Paths: main.c, Makefile, samples.c

Process, Thread, and Identity Model

Process and execution-context examples cover forking, PIDs, waits, and POSIX threads. These define the repository’s concurrency boundary between address-space processes and in-process threads.

Paths: fork.c, pid.c, wait.c, thread.c, pthread.c

Synchronization Primitives

Multiple files implement or demonstrate competing synchronization mechanisms: mutexes, spinlocks, binary/counting semaphores, reader/writer-style locking, and atomic operations. These components are the core coordination layer for shared-state examples.

Paths: mutex.c, spinlock.c, atomic.c, binarysemaphore.c, countsemaphore.c, rmlock.c

IPC and Producer/Consumer Flow

Named sender and receiver programs indicate a pipe-based message flow: a sender writes data to a pipe and a receiver consumes it. Semaphore and mutex examples likely support related producer/consumer coordination patterns, but remain separate source-level demonstrations unless linked by the build.

Paths: sender_pipe.c, receiver_pipe.c, semaphone.c

Scheduling and Time/Event Simulation

Scheduling, alarms, and simulated timer interrupts model control flow driven by time or kernel-like events. These files likely demonstrate ordering, preemption concepts, or periodic event handling rather than production scheduling infrastructure.

Paths: sheduler.c, timer_irq_sim.c, alarm.c

Memory and Fault Handling

Custom allocation and page-fault examples isolate memory-management behavior. The allocator is a material ownership boundary: callers request and release memory through repository-defined logic rather than only the C runtime allocator.

Paths: myalloctaor.c, pagefault.c

Kernel-/Device-Like Interfaces and Storage

Character-device and filesystem examples represent the lowest-level interface boundary in the repository. mychardev.c likely models device-file interaction; tinyfs.c and the tinyfs artifact represent a compact filesystem implementation or executable.

Paths: mychardev.c, tinyfs.c, tinyfs

Runtime and Infrastructure

The repository targets a native C/POSIX-style runtime, with likely dependencies on libc and OS facilities such as fork, pipes, signals, file descriptors, and pthreads. Makefile is the build orchestration point; no external cloud services, databases, web runtime, or network service dependencies are evident from the tree.

Paths: Makefile, doubt.c, main.c