Rshell Linux command

Rshell functionality

Rshell is a c++ shell that is meant to replicate the same one used in UNIX. It only has basic functionalties for now but more will be added onto it later.

• A command prompt
• Recognition of various commands
• Exit functionality
• Clear functionality
• User login recognition
• Comment recognition
• Ability to change directories

How to use cd

• To change directories, type cd <path>
• Path can be changed for example cd home/rshell/bin/rshell
• cd will change back to the home directory
• cd - will change to the previous directory
• the current directory will be printed after the prompt
• ^C will kill the child process without exiting out of my current rshell

Bugs

• Multiple piping does not work
• piping only works when it is provide with two arguments
• the <<< will only work by itself, will not work with any other command
• The 1>, 1>>, 2>, 2>> will also only work by itself.
• The only commands that can be combined together is input and output redirection

##Limitations

• Commands has a limit of 50,000 characters
• host have a name character limit of 500 characters
• every command in the piping assignment other than input and output redirection can only be used by itself
• piping can only take in two arguments
• <<< command only works by itself
• file descriptor change to stderr only works when used by itself
• cat < existingInputFile | tr A-Z a-z | tee newOutputfile1 | tr a-z A-Z > newOutputFile2 this does not work
• Make file is not attached to other functions like rm, cp, or ls. Will fix in future so make file and deal with other functionality