Use message queues to synchronize three processes P$1,$ P$2,$ and P$3$ as follows $($where P$1$ is the parent of the other

two$)$:

$($a$)$ P$1$ reads a string from the standard input and sends it to P$2$

$($b$)$ P$2$ converts the string to uppercase and sends it to P$3$

$($c$)$ P$3$ prints the converted string to the output screen.

The three processes redo the above tasks forever until the user enters $$exit$$ as an input string.write code in c langhage in lunix