[libvirt] PATCH: 1/7: Removing state from lxc_vm_t

[Jim Meyering]

"Daniel P. Berrange" <berrange at redhat.com> wrote:
> This patch does some simple re-factoring of the way the TTYs and
> control socket are handled to reduce the amount of state stored
> in the lxc_vm_t structure, in preparation for the switchover to
> the generic domain handling APIs.

One more thing:

...
> diff -r 63b8398c302e src/lxc_container.c
> --- a/src/lxc_container.c	Mon Jul 14 12:18:23 2008 +0100
> +++ b/src/lxc_container.c	Tue Jul 15 11:55:48 2008 +0100
...
> -    close(0); close(1); close(2);
> +    /* Just in case someone forget to set FD_CLOEXEC, explicitly
> +     * close all FDs before executing the container */
> +    open_max = sysconf (_SC_OPEN_MAX);
> +    for (i = 0; i < open_max; i++)
> +        if (i != ttyfd)
> +            close(i);

Do you really need to close all file descriptors > 2 ?
I seem to recall that an application doing this caused trouble
when it closed a file descriptor (opened via the shell that I
was using for log output.

I think this might have caused trouble also when I used
valgrind with its --log-* options on that program.