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moby--moby/oci
Michael Crosby ee3ac3aa66 Add init process for zombie fighting
This adds a small C binary for fighting zombies.  It is mounted under
`/dev/init` and is prepended to the args specified by the user.  You
enable it via a daemon flag, `dockerd --init`, as it is disable by
default for backwards compat.

You can also override the daemon option or specify this on a per
container basis with `docker run --init=true|false`.

You can test this by running a process like this as the pid 1 in a
container and see the extra zombie that appears in the container as it
is running.

```c

int main(int argc, char ** argv) {
	pid_t pid = fork();
	if (pid == 0) {
		pid = fork();
		if (pid == 0) {
			exit(0);
		}
		sleep(3);
		exit(0);
	}
	printf("got pid %d and exited\n", pid);
	sleep(20);
}
```

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
2016-09-19 17:33:50 -07:00
..
defaults_linux.go Add init process for zombie fighting 2016-09-19 17:33:50 -07:00
defaults_solaris.go Replace old oci specs import with runtime-specs 2016-08-17 09:38:34 -07:00
defaults_windows.go Windows OCI convergence step 1 2016-09-12 16:11:47 -07:00