rshell

rshell imitates the functionality of a terminal. rshell performs the following steps:

hw0

1. Print the command prompt userName@hostName $
2. Read in a command on one line. Commands can be separated by connectors.
   • Connectors include &&, ||, and ;.
3. Execute the line of commands
   • If a command is followed by ;, then the next command (if any) is always executed.
   • If a command is followed by &&, then the next command is executed only if the first one succeeds (returning true).
   • If a command is followed by ||, then the next command is executed only if the first one does not succeed (returning false).
   • Anything found after the first found # is considered a comment and will be ignored.

Known Bugs(hw0)

• Commands with more than 2 but less than 7 flags will not execute.
• echo with quotes will include quotes in output.

hw2

In addition to hw0 functionality, rshell can now perform the following:

1. Input redirection (< and <<<)
2. Output redirection (> and >>)
3. Pipes (single and chained)

Known Bugs(hw2)

• single and double quotes are always included in string inputs
• Cannot pipe with input redirection

hw3

In addition to hw0 and hw2 funcionality, rshell can now perform the following:

1. prompt also displays the current working directory
   • the home folder is replaced with a ~ for readability
2. cd <PATH> which will change the current working directory to
3. cd which will change the current working directory to the home directory
4. cd - prints an error if OLDPID is not set
5. ^C does not exist rshell. The current foreground job receives the SIGINT signal instead. This kills the job, and control is returned to rshell.

Known Bugs(hw3)

• cd - does not change the current working directory

ls

ls implements a subset of the GNU ls command:

1. It can support the -a, -l, and -R optional flags; and the ability to pass in one or many files optional.
2. It also displays different types of files in different colors that can be combinable
   • directories are blue
   • executables are green
   • hidden files have a gray background

Known Bugs(hw1)

• Files are listed in alphabetical order from left to right, then top to bottom.
• Columns are all of equal width.
• Sometimes outputs an unnecessary endl.

How To Run rshell

$ git clone https://github.com/jle034/rshell.git
$ cd rshell
$ git checkout hw3
$ make
$ bin/rshell

How To Run ls

$ git clone https://github.com/jle034/rshell.git
$ cd rshell
$ git checkout hw1
$ make
$ bin/ls