kcsh

A tiny UNIX shell written in C.

Features

• Parses commands from standard input and executes them until a command exit is evaluated;

• Terminates the foreground process upon input of ^D;

• Change directory using cd command, and display files/directories within a directory using ls as well as all other built-in functions;

• Executes any number of processes in background (i.e., in parallel with the foreground process), including in particular, the ability to start another process while a process has been temporarily suspended;

• Informs the user when the background process finishes or is waiting for an input from the terminal;

• Informs the user what commands are executing in the background via the jobs command, includes information about the state of the process (i.e. suspended, background, waiting for input, etc.);

• Terminates involuntarily a background processes by through the kill command.

How to compile and run

1. Open Terminal/Command Prompt.

2. Navigate to the src directory containing the kcsh.c file (and the headers.h file).

3. Compile the shell program using the following command:

   gcc -g -lreadline kcsh.c -o kcsh

4. Run the shell by typing ./kcsh (or simply kcsh on Windows) and pressing enter.