Create a microshell, myshell, that adheres to the following requirements. The program will be written in C. myshell will parse the user input. myshell has its own set of built-in commands.

1. myshell will read the user input from stdin, one line at a time.
2. myshell will parse the user input into a list of arguments. Assume that only whitespace is used to separate the arguments from each other. Assume no quoting or backslash escaping will be used.
3. myshell will execute the command. If the input is one of the built-in commands, myshell will execute the built-in command. Otherwise, it will execute the default Unix command.
4. myshell will be terminated if the user enters the command exit.
5. myshell will parse the line (user input) to separate it into an array of strings.
6. The built-in commands are:

//builtin.c

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include "builtin.h"

#include

//Prototypes

static void exitProgram(char** args, int argcp);

static void cd(char** args, int argpcp);

static void pwd(char** args, int argcp);

/* builtIn

* built in checks each built in command the given command, if the given command

* matches one of the built in commands, that command is called and builtin returns 1.

* If none of the built in commands match the wanted command, builtin returns 0;

*/

int builtIn(char** args, int argcp) {

//write your code

}

static void exitProgram(char** args, int argcp) {

//write your code

}

static void pwd(char** args, int argpc) {

//write your code

}

static void cd(char** args, int argcp) {

//write your code

}

//builtin.h

#ifndef BUILTIN_H

#define BUILTIN_H

/*BuiltIn

* args args is an array of char*'s that contain a command and the arguements

* that command

* argcp - The count of how many arguments are in args

* returns 1 if it finds a builtin command to run, returns 0 otherwise

*/

int builtIn(char** args, int argcp);

#endif

o exit [value]: exit the shell with the value. If value is not given, exit with value 0. This built-in command should call the exit(3) libra call. Hint: man 3 atoi. pwd: it will print the current working directory. Sample output: % pwd /some/path/to/directory o cd: it will change the current working directory. Consider reading the man page for chdir(2). Sample output: % pwd /some/path/to/directory % cd .. % pwd /some/path/to