On 11/04/2011 12:22 PM, Kevin Wolf wrote:
>
> That's exactly what this series did. However, daemonization has also to
> be done before opening the image file. So the series has to support
> reporting errors to syslog, and also qemu-nbd will not give a nonzero
> exit status when errors occur.
The parent could wait until the initialisation is done.
You need to daemonize first, then fork the server. If you fork the
server before daemonizing, the server:
1) is not in its own process group, and still has a controlling TTY;
2) is not your child so your process structure is all broken, with the
client and server being both child of PID 1;
3) is not your child, so you cannot reliably kill it (because if it has
exited and PID 1 has already reaped it, you might kill a random process
instead!).
Paolo
