Kiling processes in C with Signals

Question

The main process in my program forks 3 more process with say process ids as pid1, pid2, pid3. Pid1 and pid2 processes are in infinite loop. What I want is when pid3 process is over all the process including the main are terminated. As of now, I am using :

wait(pid3);
kill(0, SIGKILL);

which do all above as i said, but it prints Killed on the terminal. I don't want the signal to display killed and infact nothing, but gracefully exits from the program. How can I do that?

Answer 1

改用SIGTERM ，并安装一个在接收SIGTERM执行干净出口（例如exit(0) ）的信号处理程序。

Answer 2

另一种方法是在进程之间设置pipe() ，并让pid1和pid2进程在其管道上看到文件结束时退出。