import os
import subprocess
should_run=1
while(should_run):
        x=input("ubos>")
        if(x=="exit"):
                break   #breaks the loop when the input command is exit
        else:
                z=x.split(" ") # else the given command must be split based on spaces and loaded into list
        pid=os.fork()           # fork is created
        if(pid<0):
                print("Fork Failed") #prints that the fork is failed if obtained pid <0
        if(pid==0):
                subprocess.call(z)  #call the execvp and execute the command in the list z
                print("Child Process Created") # prints that the child process is completed
        else:
                os.waitpid(pid,0)               #wait till the parent process is completed
                should_run=-1
                print("Parent Process Created")
                break