Problem
Explain pair of programs, in C or as shell scripts, to send and receive a message.
Your programs will:
1) Send and receive a message by a covert channel on a MINIX 3 system. Hint: A permission bit can be seen even when a file is otherwise inaccessible, and the sleep command or system call is guaranteed to delay for a fixed time, set by its argument.
2) Measure the data rate on an idle system.
3) Explain artificially heavy load by starting up numerous different background processes and measure the data rate again.
Use Loom to show the code, the execution of the code, and brief explanation as to why you expanded the code the way you did.
Explain rationale explaining why you created the code the way you did. Explain your reasoning for writing the code, what the code is accomplishing, etc.