Shell_Simulator

Linux shell simular that was implemented using some C functions like fork(), execlp(), and waitpid()

Purpose

Learning process management in C/C++.

Running instruction

1.clone the repository
2.type Make or Make shell to produce the executable file
3. run it with ./shell and you can type the commmands below

Commands List

1. cdir <pathname>: change current directory to pathname. can Be absolute or relative path. environmental variable works as well
   example: cdir $HOME/document \
2. pdir: prints the path of the current directory
3. lstasks: list all the processes that were executed by run command
4. run <programName> arg1 .. arg4: runs with their argument. Implemented using fork() and execlp(). becomes a task
   example: run xclock -geometry 200x200
5. stop taskNumber: stops the task using SIGSTOP
6. continue taskNumber: conitune the tasks that were stopped
7. terminate taskNumber: terminate the task
8. check <PID>: list out the descendent process of process with this PID
9. exit: terminate the program. this will free up all the processes that were ran
10. quit: termiane without freeing the process. They will become a zombie process.