$1.$ Read the section that addresses message queues in the lab manual.

$2.$ Read the manual pages of the following systems calls:

#include

#include

#include

int msgget$($key$\_$t key, int msgflg$)$;

int msgsnd$($int msqid, const void $*$msgp$,$ size$\_$t msgsz$,$ int msgflg$)$;

ssize$\_$t msgrcv$($int msqid, void $*$msgp$,$ size$\_$t msgsz$,$ long msgtyp$,$ int msgflg$)$;

Experiment

$1.$ Write two programs and name them send.c and receive.c to send and receive messages from a message queue

respectively. The send program is executed as follows:

$./$send key type data

it writes the text message $$data $$ into the message queue whose key is $$key$,$ where $$type$$ is the type of the

written message. The receive function, on the other hand, is executed as follows:

$./$receive key type

it reads a message of type $$type$$ from the message queue whose key is $$key$$ if such message exists, and blocks

otherwise. Test your code and show your work to your lab instructor.

Use the following message format:

struct Message$\{$

long type;

char data$[15]$;

$\}$

$2.$ Assume you have two processes, a parent and a child. The parent prints the numbers from $1$ to $5,$ while the

child prints the characters from A to E$.$ Use a single message queue to synchronize the two processes such that

they produce the following output:

$1$

A

$2$

B

$....$

$5$

E