# COMP-325 Assignment 2 - mo khan (3431709)

> Write shell scripts specified in problem 6 at the end of Chapter 16.
> Write shell scripts specified in problem 7 at the end of Chapter 16.
> shell scripts specified in problem 13 at the end of Chapter 16.

I have placed the Bourne shell scripts in the `bin` directory. I have
also included tests for these scripts in the `test` directory. I have
bundled a copy of [bats](https://github.com/sstephenson/bats) to make it
easier to run the tests.

```bash
$ sh ./bin/test
1..10
ok 1 testing
ok 2 invoke with a single integer
ok 3 invoke with multiple integers
ok 4 invoke with single non-numeric
ok 5 invoke with multiple non-numeric
ok 6 invoke with mixed numeric and non-numeric
ok 7 invoke with a host on the network
ok 8 invoke with a host not on the network
ok 9 invoke without a hostname argument
ok 10 invoke with multiple hostnames
```

All source code related to this assigment is stored in a private git
repository hosted on GitHub. Access is available upon request.

## Chapter 16

### Problem 6

Write a Bourne shell script that takes a list of integers as the command line argument and displays a list of their squares and the sum of the numbers in the list of squares.

```bash
$ sh bin/problem-6.sh 1 2 3 4 5
squares: 1 4 9 16 25
sum: 15
```

### Problem 7

Write a Bourne shell script that takes a machine name as an argument and displays a message informing you whether the host is on the local network.

```bash
$ sh bin/problem-7.sh localhost
localhost is on the network
$ sh bin/problem-7.sh invalid
invalid is NOT on the network
```

### Problem 13

Write a Bourne shell script for Problem 16 in Chapter 15, but use functions to implement the service code for various options.
Modify the script in the `case_demo` file in Section 15.6.6 so that it allows you to try any number of options and quits only when you use the q option.

```bash
$ sh bin/problem-13.sh
Use one of the following options:
    d: To display today's date and present time
    l: To see the listing of files in your present working directory
    w: To see who's logged in
    q: To quit this program
Enter your option and hit <Enter>:
d
Sat May 25 19:52:41 MDT 2019
Use one of the following options:
    d: To display today's date and present time
    l: To see the listing of files in your present working directory
    w: To see who's logged in
    q: To quit this program
Enter your option and hit <Enter>:
l
bin  Gemfile  Gemfile.lock  node_modules  package.json  pkg  Rakefile  README.md  README.pdf  test  tmp  vendor  yarn.lock
Use one of the following options:
    d: To display today's date and present time
    l: To see the listing of files in your present working directory
    w: To see who's logged in
    q: To quit this program
Enter your option and hit <Enter>:
w
mokha    tty2         2019-05-21 20:12 (tty2)
Use one of the following options:
    d: To display today's date and present time
    l: To see the listing of files in your present working directory
    w: To see who's logged in
    q: To quit this program
Enter your option and hit <Enter>:
q
```