How to execute the shell

Use ./esh to run the shell and -p path to load plugins

Description of Base Functionality

• jobs: print a list of current jobs with their job id, status, and command line

• fg: put the specified background job or most recent background job into foreground and run it.

• bg: make the specified background job or most recent background job run in background.

• kill: kill the specified background job.

• stop: stop the specified background job.

• ctrl+z: send SIGTSTP to the current running job and update job status

• ctrl+c: sent SIGINT to the current running job and update job status.

Description of Extend Functionality

• I/O: Use open system call to open a file in special mode and connect it to the 0 or 1 file descriptor

• Pipes: Using two pipes to give the output of the last command as the input of the command following.

• Exclusive Access: Give terminal to application like VIM

List of Plugins Implemented

• circalc Calculates and outputs the area and circumference of the given circle.