Introduction - If you have any usage issues, please Google them yourself
Some examples/programs of using unix signals.
Write a program wich simulates a stopwatch. First the timer is
initialized at 0. When receiving SIGUSR1 an intermediate time
will be displayed. When receiving SIGUSR2 the program will end.
Write a program which, upon receiveing the semnal SIGUSR1 signal starts to
read a text file and, upon receiving the the SIGUSR2 signal displays the status#of a file:number of lines, number of words, number of characters