^{Write a C program that prints Hello world! or another simple message, then reads a text file into a buffer on the heap, sets a global integer to the number of bytes read, and then goes into a wait state for a very long time instead of exiting (the sleep() function from unistd.h is a good way of doing this). Compile it into a dynamically linked ELF library (this is the default and you dont have to do anything special).}