rshell

rshell is a basic command shell. It displays the currently logged in user as well as host name followed by a $ command prompt. It is able to take in commands and execute them. There are however, several bugs and limitations in the program listed below.

Installation guide

   $ git clone  http://github.com/SpaceCowboy100/rshell.git
   $ cd rshell
   $ git checkout hw3
   $ make
   $ bin/rshell

Bugs/Limitations

• Accepts invalid connectors such as

   ls &&& ls -a
   ls |||| false

• echo of a spaced out phrase in quotes is compressed.

   echo "hello               world "

outputs hello world

• rshell accepts instances of the separators when it should not, the same applies for the ; and & characters.

   jcand003@hammer$ ||||||

• A semicolon followed by a valid command executes ie. jcand003@hammer$ ;pwd

• Valid arguements but connected by a ;; passes such asls;; ls.

• If an invalid argument such exceeds 100 characters, and error is not thrown.

• error is thrown if host name exceeds 50 characters

• piping only functions with one pipe, it cannot be chained.

• piping throws several perrors, with correct output in only some cases.

• make must be called after every IO redirection command < > >> |.

• cd changes to home directory only, it cannot take in arguements.

ls

rshell also includes an implementation of the ls command to download this implementation of ls do the following.

	$ git clone  http://github.com/SpaceCowboy100/rshell.git
	$ cd rshell
	$ git checkout hw1
	$ make
	$ bin/ls

ls - Bugs/Limitations

• bin/ls - does not throw an error

• There is no support for the -R flag

• bin/ls -l of a directory path will output the entire path, instead of just the file or directory.