rshell is a linux based terminal emulator in C++ created by Bradd Carey (git: radbradd).
For a full documentation and description of classes please refer to the dOxygen code.

This project was created by guidelines set by Professor Brian Crites for UC Riverside Bourne’s College of Engineering course CS 100 (Software Construction) Spring 2016.

Description

This project uses C++ to emulate the linux terminal by running programs found in /bin/. It is designed to run any number of those programs given the correct commands. For example: ls whoami echo pwd mkdir

Additionally commands can be linked by common connectors (&& || and ;) and comments are also detected and properly parsed.

A set of tests are included in rshell/scripts/ to fully test the functionality of the program.

Version

1.2 - Assignment 4

Release Notes

1.2:

• Added functionality to emulate pipes | and redirects < > >>

 cat < foo.txt | tr A-Z a-z | tee out1.txt | tr a-z A-Z > out2.txt

• Cleaned parsing and execution functions to be more consistent in calls

1.1:

• Added functionality for parentheses guiding precedence

(echo a && echo b)||(echo c && echo d) # separate sets of parentheses
echo a && (echo b || (echo c && echo d)); (echo e) # shallow nesting
(echo a && (echo b && (echo c && (echo d || (echo e))))) # deep nesting

• Added functionality for path testing

# no flag or '-e' flag preceded by test or in [] verifies path exists
[ ../makefile ] && echo "makefile exists" || echo "makefile does not exist"
test -e ../makefile && echo "makefile exists" || echo "makefile does not exist"

# flag '-f' verifies path points to file
[ -f ../makefile ] && echo "makefile is a file" || echo "makefile is not a file"

# flag '-d' verifies path points to directory
[ -d ../src ] && echo "src is a directory" || echo "src is not a directory"

• Fixed a bug that would sometimes allow a false on the left side of an && to return true
• Fixed a bug where a command beginning with a comment exit shell

Installation

$ git clone https://github.com/radbradd/rshell.git
$ cd rshell
$ git checkout hw3
$ make
$ bin/rshell

Known Bugs

Future Implementations

• To make use of bash specific functions such as cd