Bash Shell:

Usage:

1. make
2. ./shell

Files:

* code.c 	            -	contains the main file
* command_split_read.c 	-	helps in parsing the commands
* execute_echo.c 	    -	Function to execute echo
* execute_nightswatch.c 	- 	Function to execute nightswatch
* execute_pwd.c 	    -	Function to get the current working directory
* print_home.c 	        -	helps in printing the prompt
* shell_loop.c 	        -	To continue the prompt after every command
* command_execute.c 	- 	Executing a given command
* execute_cd.c 	        -	Function to execute cd
* execute_pinfo.c 	    -	Function to execute pinfo
* execute_rest.c 	    -	Function to execute commands not in the built in commands
* string_fun.c 	        -	helps in string operations

Commands that can be run on the shell:

* pwd	                -	Get the present working directory
* cd                    -	Change directory
* ls with options -l and -a  -	List the contents(files/folders/symlinks, etc)
* pinfo             	-	Get the process information
* pinfo <pid>	        -	Get the process information of the given process id
* quit	                -	Exit the shell
* clear	                -	Clear the screen
* nightswatch <dirty/interrupt>	with option -n 	-	print the dirty memory/ cpu interrupts from keyboard controller every n seconds (default 2)
* overkill              -    Kills all background processes
* fg [JobNumber]          -   Brings a background process to foreground
* bg [JobNumber]          -   Brings a stopped background process to running background process
* echo, setenv, unsetenv  - Normal functioning as in bash
* kjob [jobNumber] [signalNumber] - Sends the given signal to a process
* background processes can be run with &	    -	Get processes running in the background