Simulated Shell

Basic simulation of mainly job control.

Usage

1. Type jobs to view all the background jobs (running as well as stopped).
2. Type start x where x is the pid of the stopped background job which you want to run in background.
3. Type stop x where x is the pid of the running background job which you want to stop in background.
4. Append & in the end of command to make the process as background job.
5. Press Ctrl + \ to kill all the jobs (running as well as stopped).
6. Type quit to quit the main program.

Note

• Main program is itself immune to Ctrl + C , Ctrl + Z , Ctrl + \.
• To stop a foreground job running press Ctrl + C.

BUG

• While a foreground job is running pressing Ctrl + Z sends SIGTSTP to the process but doesn't returns the control back to the main program which makes the main program hang. In this case start another terminal and send SIGKILL to the foreground job from there.