Anyway in java to way for the child process to wait for parent process to die

[Christos Zoulas]

On Nov 12,  8:29am, David.Holmes at Sun.COM (David Holmes - Sun Microsystems) wrote:
-- Subject: Re: Anyway in java to way for the child process to wait for paren

| Paulo Levi said the following on 11/12/09 05:31:
| > In process builder.
| 
| No.
| 
| I'm not aware of any OS support for waiting for a parent process to die.
| 
| David Holmes

All the BSD's have it.

christos

#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>
#include <err.h>

int
main(int argc, char *argv[])
{
	int kq, nev;
	struct kevent ev, ch;

	if ((kq = kqueue()) == -1)
		err(1, "Cannot create kqueue");

	EV_SET(&ch, getppid(), EVFILT_PROC, EV_ADD | EV_ENABLE | EV_CLEAR, 
	    NOTE_EXIT, 0, 0);
	nev = kevent(kq, &ch, 1, &ev, 1, NULL);
	if (nev == -1)
		err(1, "kevent");
	if (nev == 0)
		errx("no event");
	if (ev.fflags & NOTE_EXIT)
		printf("my parent is now %u\n", (unsigned)getppid());
	else
		errx("unknown flags %x", ev.fflags);
	return;
}