Description
Print the string “Hello World” on screen. Each character must be printed by a different process. The process that prints the it h letter must have been spawned by the process that printed the (i-1)t h letter. Each process must first print its designated character, as well as its own process ID, second, sleep for a random number of seconds (from 1 to 4 seconds), and then, do anything else it must do to achieve the given task.
What is the minimum lines of C code with which you can achieve the above?
Remember these processes have to be run in the guest Minix3 system. To compile in the guest system, we use a C compiler named clang (instead of gcc). Also, standard make is invoked as gmake in the Minix3 environment.
Submit: a single zip file (format: <roll-number-1>_<roll-number-2>_lab2_part1.zip) with all required source files and a Makefile. The evaluator will simply unzip the submission, and run “gmake hello”. If the desired output is not seen, you will not be awarded any marks.
Part II
Modify the Minix3 source code such that:
- ● A message “Minix: PID <pid> created” is printed, whenever a process is created. (Let us
follow the convention throughout this course that anything printed by the Operating
System code will be prepended by the string “Minix: “.)
- ● A message “Minix: PID <pid> exited” is printed, whenever a process ends.
Comment on the order in which processes are created and processes exit and justify it is as expected.
