Q2: Issuse with using unix, I'm not great at this please i'll rate. please show work by using a program

C Programming cc, vi or vim or notepad, cat, gets, scanf, printf, strcmp, strtok, running program, instructor notes on C Language programming and textbook

Write a C program to perform the following. Read the name of an ftp command, identify whether it is a valid command or not and print a line indicating the command is valid or invalid.

The list of valid ftp command to use for this question is: (1) ascii, (2) recv (and/or get), (3) send (and/or put), (4) rmdir, (5) mkdir, (6) pwd, (7) ls, (8) cd, (9) status and (10) quit.

The pseudo code is given below.

Step 1: Read an ftp command into a character array from keyboard using gets function or scanf.

Step 2: Identify what command it is using strcmp function.

Step 3: For valid ftp command print a line of output as: pwd is a valid ftp command

For invalid ftp command print a line of output as: xyz is not a valid ftp command

Display the content of source code file hw3q2.c.

Run the executable file which will produce output.

NOTE: You can run the program multiple times testing for valid ftp commands and one invalid command. Alternately, you can write a loop around Step 1 to 3 and loop until quit command is typed.

Optional Extra Credit 15 Points: Depending on the ftp command, it may be just the command name (example: ascii, quit, status) or command name followed by one argument (example: get hw1.c, put hw3q1.c).

To get the extra credit points, read an ftp command with or without an argument and separate the command and argument using strtok function. Perform the comparison to find out the ftp command is valid, and then print both command and argument like: The ftp command is get and argument is hw1.c

Incorporating this feature is optional. This requires only couple of lines of extra code. You still write one program for Q2.

Create the source code file, compile and create an executable file. Run the program and get the output. You have to test the program using all the ftp commands given above one by one as input.

Print the source code file, cc command, running the command and the output as part of this question.

Extra Credit 25 Points:

Make utility and makefile are widely used in the software development on UNIX systems. Knowing it will be helpful to you. Hence, if you do it with the makefile as explained below, you will get extra points which will improve your grade. It will help in your quiz. Make sure you understand the concept of make command and the makefile.

You can do this question without using make command and makefile. However, you will not get the extra points.

Create a file called makefile containing the following 4 lines assuming hw3q2.c is the name of the C program filename for this Q2.

hw3q2: hw3q2.o

cc hw3q2.o -o hw3q2

hw3q2.o: hw3q2.c

cc -c hw3q2.c

The statements in the above makefile consist of a line with (1) target filename to be created like hw3q2.o followed by : (colon character), (2) followed by a list of dependent filename(s) like hw3q2.c which are needed to create the target file, and (3) in the next line the command to create the target file like the cc command. This command line MUST start with tab key as the first character in the line, otherwise, make command will generate an error resulting in the target file not getting created. Using this description, describe the first two lines and understand them.

Note, the ultimate target file you want to create must be specified first, in this case hw3q2, and then other target file(s) to be created.

Now try to understand all the four lines together. You will see what the makefile does.

To perform the statements in the makefile, you have to run the make command. The make command will read the statements (lines) specified in the makefile and perform what you have asked to do. The make command can be invoked in one of two ways as shown below:

make f makefile

make

In the first case, you specify the name of the makefile. If you name of the file with a different name like hw3q2make, then you can specify the make command as

make f hw3q2make

In the second case, when the filename is not specified, the make command reads the file named makefile by default.

IMPORTANT NOTE: The line containing the cc command MUST start with a tab.

Otherwise, make command will not work and fail with an error.

Create a directory called q2makedir. Put hw3q2.c file, and the makefile in that directory.

Change working directory to q2makedir.

Issue make command. It will compile hw3q2.c program, link it and create the object file called hw3q2.o and an executable file called hw3q2. Fix any error you made in hw3q2.c and makefile.

Issue ls l to display all the files in the directory.

Display the content of source code file hw3q2.c, and the makefile.

Run the executable file which will produce output.