Add code to set up a timer (using setitimerLinks to an external site.) for s seconds (where s is obtained from the command line). You shouldn't use real time, since your results will be affected if your system is busy. Instead, use ITIMER_PROF to make the itimer send a SIGPROF. Then change your signal handler to print a message to standard out (use the MESSAGE format in the starter code) that provides both the total number of reads completed and the time elapsed (s seconds).