clrung/myshell

An implementation of a shell

myshell

A custom implementation of a shell that I wrote for CSCI 315: Operating Systems Design, during my Junior year at Bucknell. The shell is basic, but has some added functionality; it is able to read and execute multiple commands that are separated by a semicolon, and it also supports piping.

Installation

Use the provided makefile to compile the source.

$ make
gcc -std=gnu99 -Wall -g  myshell.c -o myshell

To view debug output, uncomment the —DDEBUG flag in the makefile, run make clean to delete the compiled files, and then run make again.

Usage

After running myshell from the command line, you will see myshell’s prompt

$ ./myshell
myshell>

Input any bash command into this shell and it will execute the command as you would expect in a regular shell.

myshell>ls
LICENSE		makefile	myshell.c
README.md	myshell		myshell.dSYM

Separating commands with a semicolon executes both commands.

myshell>mkdir test; ls
LICENSE		makefile	myshell.c	test
README.md	myshell		myshell.dSYM