[gentoo-user] Re: Output of "mount" and "cat /etc/mtab" inside install chroot?

[Jonathan Callen <jcallen@gentoo.org>]

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On 04/22/2014 04:48 AM, Peter Humphrey wrote:
> On Monday 21 Apr 2014 19:44:45 Walter Dnes wrote:
> 
>> *AFTER YOU CHROOT* what are the contents of /proc/self/mounts and /proc/mounts ?  Can you
>> copy either of them into /etc/mtab and have the correct result?
> 
> No, of course it's the same as outside the chroot, because before entering, I do a 'mount
> -tproc proc /mnt/atom/proc'. I did check anyway to be sure.
> 

You may want to check again: you likely won't see any /mnt/atom/* in /proc/mounts (which is a
symlink to /proc/self/mounts), as they will have their paths correctly output for inside the
chroot, but you *will* see mounts that only exist outside the chroot.  /proc/self/mountinfo will
only show mounts reachable from inside the chroot, but it is incompatible with the mtab format.
Newer versions of mount(8) will use /proc/self/mountinfo if it detects that the final target of
/etc/mtab (possibly /proc/self/mounts) is not writable.

- -- 
Jonathan Callen
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