Description

Objective :

• Lab 2 is intended to provide the way to use the most common system calls in order to make input-output operations on files, as well as operations to handle files and directories in Linux
Recommended Systems/Software Requirements:

• Any flavour of Linux
References:
1. Unix concepts and applications, Fourth Edition, Sumitabha Das, TMH.
Tutorial:
• Tut 1 : Learning how to use the system calls for opening, reading and writing to files – open, read, write and lseek system calls
1. Login to the system, open the Terminal and use the man command to read the manual pages of open, read, write and lseek system calls:
2. Download the file open read write with linux sys calls provided in the helpful resources section of Lab2 and compile using gcc. This C program intends to read 100 characters from a file and to print these 100 characters on the terminal. It uses open system call to open a file. The open call returns a file descriptor fd which is then used in the successive read and write system calls to access the file.
• Tut 2: Writing lines of text using system calls
1. Download the file write lines of text sys call provided in the helpful resources section of Lab2 and compile using gcc.
• Tut 3: Simulating the ls command
1. Download the file simulating ”ls” command provided in the helpful resources section of Lab2 and compile using gcc.
This C program performs the simulation of the ls command in Linux which lists all the folders and sub-folders of its present working directory.
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Assignemnts:

1. Using a similar approach as covered in Tut 3 , implement in C the following UNIX commands using System calls : cat and mv
3. Write a C program that deletes a directory with all its subfolders. The name of the directory should be read from the command line.
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