Messages in this thread | | | Date | Fri, 7 Oct 2011 18:01:14 +0200 | From | Lennart Poettering <> | Subject | Re: A Plumber’ s Wish List for Linux |
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On Fri, 07.10.11 00:49, Matt Helsley (matthltc@us.ibm.com) wrote:
> > On Fri, Oct 07, 2011 at 01:17:02AM +0200, Kay Sievers wrote: > > <snip> > > > * simple, reliable and future-proof way to detect whether a specific pid > > is running in a CLONE_NEWPID container, i.e. not in the root PID > > namespace. Currently, there are available a few ugly hacks to detect > > Is that precisely what's needed or would it be sufficient to know > that the pid is running in a child pid namespace of the current pid > namespace? If so, I think this could eventually be done by comparing > the inode numbers assigned to /proc/<pid>/ns/pid to those of > /proc/1/ns/pid.
I think the most interesting test would be to figure out for a process if itself is running in a PID namespace. And for that comparing inodes wouldn't work since the namespace process would never get access to the inode of the outside init.
Lennart
-- Lennart Poettering - Red Hat, Inc.
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