Student Information
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Nayef Copty - nayefc
K Alnajar - kar

How to execute the shell
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After using the Make command, use the command ./esh to run the shell. Pass '-p <directory>' as an argument to run custom plugins.

Important Notes
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There are no critical notes about the shell. All basic and advanced tests pass without issue.

Description of Base Functionality
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jobs:
The 'jobs' command will display a list of currently running jobs.
It will display the jobs' IDs, their status and the actual command confirming to the regular expression in eshoutpy.py

fg:
fg will bring up a job from the background to the foreground and gives that process group terminal access. 
If a job ID is given: fg % 2, it will bring that job to the foreground and give that foreground group terminal access.

bg:
The 'bg' command will continue a stopped job (by sending it SIGCONT).
It can take a job ID as an argument (starting that specific job) or if no argument was passed, it will start the latest added job.

kill:
The 'kill' command will kill a job (by sending it SIGKILL).
It can take a job ID as an argument (killing that specific job) or if no argument was passed, it will kill the latest started job.

stop:
The 'stop' command will stop a job (by sending it SIGSTOP).
It can take a job ID as an argument (stopping that specific job) or if no argument was passed, it will stop the latest started job.

^C:
Ctrl-C is initiated by the user and will send a SIGINT signal, interrupting the job in the foreground.

^Z:
Ctrl-Z is initiated by the user and will send a SIGSTOP signal, stopping the job in the foreground.

Description of Extended Functionality
-------------------------------------

I/O Redirection:
I/O redirection will change the stdin or stdout source from/to a file. 
To redirect output, this is implemented using "process > out" to redirect "process" output to file "out".
To redirect input, this is implemented using "process < in" to redirect "process" stdin from file "in".

Pipes:
Pipes direct the stdout of one process into the stdin of the next process. For example:
ls | grep esh | sort -r will run 'ls', direct its stdout into 'grep esh' which will search the output of 'ls' (list of current directory) for files that contain the name 'esh'.
The stdout of that process (all files that contain esh) will be redirected into the stdin of 'sort -r' (which sorts data coming from stdin) which will sort the data 
(in reverse order, -r flag) and that is outout to stdonut.

Exclusive Access:
Exclusive access allows a foreground process to have exclusive access to the terminal. Our test file demonstrates in multiple ways using a text editor. It also
attemps to run Emacs in the background (which requires the terminal). Emacs is immediately stopped until the user puts it into the foreground.