Objectives

$$ To practice creating, managing, and terminating processes using system calls in C$.$

$$ To manipulate files and directories with system calls.

$$ To demonstrate error handling in system$-$level programming.

Description

In this homework, you will implement a program that performs file manipulation and

manages multiple child processes to perform tasks on files in a given directory. The program

will:

$1.$ Accept a directory as a command$-$line argument.

$2.$ For each file in the directory, create a child process that prints the file name, its size,

and the number of words in the file.

$3.$ Ensure the parent process waits for all child processes to complete before exiting.

$4.$ Implement basic error handling: check for invalid directories, failed process creation,

and inaccessible files.

Detailed Requirements:

$$ Command$-$line Arguments:

o The program should accept one command$-$line argument, which is the

directory name.

o If no argument is provided, the program should print an error message and

exit.

o If the directory is invalid or doesn't exist, print an error message and exit.