Re: [PATCH 2/4] clone.2: Describe the user namespace

Hi Eric,

On Tue, Jan 1, 2013 at 10:39 AM, Eric W. Biederman
[off-list ref] wrote:

"Michael Kerrisk (man-pages)" [off-list ref] writes:

quoted

Hi Eric,

On Thu, Dec 27, 2012 at 6:47 PM, Eric W. Biederman
[off-list ref] wrote:

quoted

There is one other bit that needs to be documented in clone, although
I am not certain where/how.

The sequences:

unshare(CLONE_NEWPID).
clone(CLONE_VM)

setns(fd, CLONE_NEWPID).
clone(CLONE_VM).

Now fail.

Can you define "now" please. Which kernel version?

3.8

The sequence was impossible in 3.7.

I think that change that made that impossible happened in the 3.8-rc1 to
3.8-rc2 window.

Adding something along these lines to the man page would be fine, but
we need some text to explain *why* these sequences fail. Could you
send me a sentence or two about that?

Thanks,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface"; http://man7.org/tlpi/