Process 15979: Parent process
Process 15979: Going to sleep
Process 15981: Child process
Process 15981: Going to sleep
Process 15979: Caught SIGINT (signal 2) (use SIGQUIT (signal 3) to kill this process)
Process 15979: Going to sleep
Process 15979: Caught SIGINT (signal 2) (use SIGQUIT (signal 3) to kill this process)
Process 15979: Going to sleep
Process 15979: Caught SIGINT (signal 2) (use SIGQUIT (signal 3) to kill this process)
Process 15979: Going to sleep
Process 15981: Caught SIGUSR1 (signal 10)
Process 15981: Going to sleep
Process 15981: Caught SIGUSR1 (signal 10)
Process 15981: Going to sleep
Process 15979: Caught SIGQUIT (signal 3)
Process 15979: Going to sleep
Process 15981: Caught SIGUSR2 (signal 12) and exiting ...
Process 15979: Caught SIGCHLD (signal 17)
Process 15979: Child process 15981 terminated with exit status 0