...and library functions may operate on all members of a process group, including kill (2), killpg (3), getpriority (2), setpriority (2), ioprio_get (2), ioprio_set (2), waitid (2)…...m. pidfd_send_signal (2) Sends a signal to a process identified by a PID file descriptor. killpg (3) Sends a signal to all of the members of a specified process group. pthread_k…