C Program to Simulate grep Command in Linux

This post contains C program to simulate grep command in Linux or Unix operating systems

Simulation of  grep command in Linux

#include<stdio.h>
#include<string.h>
main()
{

C Program to Simulate the ls Command in Linux Operating system

This is a c program to do Simulation of ls Command in linux. The ls command lists all the contents of the directory including filse and sub-directories. The following program in C language will simulate the ls command.

#include<stdio.h>
#include<dirent.h>
main()
{

C Program to Remove (Delete) a Directory using LINUX System Calls

This is a C program to delete  or remove a directory using the system calls in Linux or Unix operating systems. The program make use of the remove() system call in Linux.

#include<stdio.h>
#include<fcntl.h>
main()
{

C Program to open, read and write files and perform file copy operation usingSystem Calls in UNIX

Write a program to open, read and write files and perform file copy operation. This program show how to open, read, write and copy files using Linux or Unix system calls like open(), read() and write().

#include<stdio.h>
#include<fcntl.h>
main()
{

C Program to Open, Read and Write a file using System Calls

This is a C program to open , read and write files using system calls in Linux (UNIX) operating systems. The system calls open(), read() and write() are used in the C program to open, read and write files in Unix/Linux operating systems.

#include<stdio.h>
#include<fcntl.h>
main()
{

Using System calls in C Program to rename a Directory in Linux

C Program to rename a directory in Unix or Linux operating systems using system call rename().

#include<stdio.h>
main()
{

How to Create process and display Process ID (pid) of Both Parent and Child

This program shows how to create process and display Process ID (pid) of Both Parent and Child processes. The process is created using the fork system call in UNIX (Linux) operating systems.

#include<stdio.h>
#include<dirent.h>
main(int argc,char **argv)
{

How to use fork and exec System Call

Using fork and exec System calls in Linux (UNIX) operating systems. Fork system call is used to create a child process from a parent process.
#include<stdio.h>
main()
{

How to use exit() System call

C program to show how to use exit system call. The function exit() is used to exit from a process (or to terminate a process). This works both in Linux or UNIX and Windows operating systems.

#include<stdio.h>
main()
{

How to make parent process wait till Completion of Child Process (Joining parent with child process)

How to make the parent process wait till the completion of execution of child process. The following C program makes the parent process to wait till the completion of its child process.

#include<stdio.h>
main()
{

How to make Child process an Orphan Process

C program in Linux or Unix to make a child process orphan:

Making child as orphan

#include<stdio.h>
main()
{

Inter Process Communication using Named Pipes - Chat Program in C

In this post, we will see a chat program using named pipes (fifo). Pipes are used for communication between processes. The named pipes are fifos. They enable two way communication unlike ordinary pipes. But they are half duplex, i.e. communication can take place only in one direction at a time. The program is in 3 parts: pipe_creation.c, leftTerminal.c and rightTerminal.c.

pipe_creation.c

#include<stdio.h>
void main()

Creating A Process in Linux (UNIX) - fork() Example Program

The system call fork() is used to  create a new process in UNIX based operating systems and Linux systems. The fork() system call creates a child process when called from a parent process. Unix will make an exact copy of the parent's address space and give it to the child. Therefore, the parent and child processes have separate address spaces. Here is a C program which uses the fork() system call to create a process during execution. The program is commented well for better understanding.

Program

/*The program (parent process) reads an array from the user.
It sorts it in descending order.

Intel 8085 Microprocessor Simulator Software for Computer

In this post, I am adding links to some of the Intel 8085 Microprocessor kit Simulator software for your computer. They are available free of cost. There are 8085 simulator applications with Microprocessor textbooks like 8085 Microprocessor by Gaonkar. The following are 8085 simulator software for computer available for free download.

Java simulator with good features.
http://8085simulator.codeplex.com

GNU SIM 8085 simulator for Windows and Linux
http://gnusim8085.org