This simple shell implementation is my take on a project described in this assignment for the Operating Systems: Three easy pieces book. The only functionality I added beside the described are pipes.

Supported features

• Running commands found in the search path (more in the built-in section). Ex: ls -l
• Multiple commands ls & cat foo.txt & echo "bar"
• Output redirection ls -l > foo.txt
• Pipes ls -l | grep foo | wc
• Running a batch file containing a list of commands ./mishell batch.txt
• A usable CLI provided by the readline lib - better line editing and command history

Built in commands

• path p1 p2 ... - Adds p1, p2... to the shell search path. The search path is a list of directories in which the shell searches for the command the user wants to execute. By default the search path is equal to /usr/bin.
• cd dir- Change the current working directory to dir.
• exit- exit the shell

My opinion

Since this was the first bigger c-project I did I'm fairly satisfied. However the way I did parsing seems a bit hacky. I definitely to rewrite this part. Another one is error reporting which is almost nonexistent because every failure results in the same "An error has occurred" message.