我有一个子进程(在 MacOS 上运行),如果父进程退出、退出、终止、被杀死或崩溃,我想杀死它自己。遵循了如何在父母退出后使子进程死亡的建议?如果父程序崩溃,我无法让它安静地自杀。在我手动杀死它之前,它将进入 100% CPU。
以下是代码的关键点:
int main(int argc, char *argv[])
{
// Catch signals
signal(SIGINT, interruptHandler);
signal(SIGABRT, interruptHandler);
signal(SIGTERM, interruptHandler);
signal(SIGPIPE, interruptHandler);
// Create kqueue event filter
int kqueue_fd = kqueue();
struct kevent kev, recv_kev;
EV_SET(&kev, parent_pid, EVFILT_PROC, EV_ADD|EV_ENABLE, NOTE_EXIT, 0, NULL);
kevent(kqueue_fd, &kev, 1, NULL, 0, NULL);
struct pollfd kqpoll;
kqpoll.fd = kqueue_fd;
kqpoll.events = POLLIN;
// Start a run loop
while(processEvents())
{
if(kill(parent_pid, 0) == -1)
if(errno == ESRCH)
break;
if(poll(&kqpoll, 1, 0) == 1)
if(kevent(kqueue_fd, NULL, 0, &recv_kev, 1, NULL))
break;
parent_pid = getppid();
if(parent_pid == 1)
break;
sleep(a_short_time);
// (simple code here causes subprocess to sleep longer if it hasn't
// received any events recently)
}
}