Write a C
or C++ program called FourPairs described below.
Usage Syntax:
FourPairs
[-s | -c]
Where:
-s
sequential
-c
concurrent
ü The program creates four pairs of children
processes P1, P2, P3 and P4.
Each pair Pi
composed of two children, the first is “Male”
and the 2nd is “Female”
The program
has two options:
-s
option: The program
creates the four pairs sequentially one at a time and waits for two process of
each pair to terminates before starting the next pair.
-c
option: The program
creates all the four pairs to run concurrently and then waits for all the 8 processes to
terminate.
ü The children of pair Pi
communicate using the following IPC
methods:
P1: shared memory
P2: sockets
P3: pipe
P4: shared file
ü The program prints the following after the
creation of each pair:
Pair Pi: Using
“IPC method”
Created Son PID
of Pair Pi.
Created
Daughter PID of Pair Pi.
and prints
the following after the termination of each process:
Daughter PID of Pair Pi EXITED
after (t) seconds.
OR
Son PID of
Pair Pi EXITED after (t) seconds.
ü The male process of the pair writes the following message to the
female process:
How
are you my sister?
Your brother PID
Date
ü The female process of the pair waits 1 second before reading the message,
prints it to the tty, waits 2 seconds before replying with the following
message:
I am fine my
brother.
Your sister
PID
Date
It waits a random time between 4 and 10 seconds and then exits.
ü The male process waits 4 seconds before reading the female reply,
prints it to the tty, waits a random time <= 10
seconds and then exits.
ü The parent waits for both children and then prints the following messages in any
order:
Daughter PID
of Pair Pi Exited.
Son PID of
Pair Pi Exited.
You
may execute my solutions at:
http://www.cs.odu.edu/~cs471w/spring13/assignments/a1/wahab