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
is composed of two children, the first is “Male”
and the 2nd is “Female”
The program
has two options:
-s The program creates the four pairs sequentially one at a time and waits
for the two process of each pair to terminates before starting the next pair.
-c The program creates all four pairs to run concurrently and then waits for all
processes of the 4 pairs 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
parent process 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.
ü The parent waits for both children and then prints the following messages in any
order:
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 male process waits 4
seconds before reading
the female reply, prints it to the tty, waits a
random time T <=
10 seconds and then exits.
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
ü The female process waits a
random time
T
where 4 <= T <=10 seconds and then exits.
You
may execute my solutions at:
http://www.cs.odu.edu/~cs471w/spring13/assignments/a1/wahab