* Another question on bind mounts without mtab
@ 2014-01-10 14:38 Phillip Susi
2014-01-13 8:48 ` Karel Zak
0 siblings, 1 reply; 2+ messages in thread
From: Phillip Susi @ 2014-01-10 14:38 UTC (permalink / raw)
To: util-linux
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I've had another question come up about bind mounts and the lack of
mtab and I'm not sure how to answer it because it does seem a more
important use case that has been lost than those previously discussed.
If /dev/sda1 is mounted in /, and you bind mount /home/foo to /mnt,
then there is no way to tell from the output of mount that it is in
fact, the /home/foo directory of /dev/sda1 that is in /mnt. It looks
like you just bind mounted the whole drive there, and the subdirectory
path is lost.
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Another question on bind mounts without mtab
2014-01-10 14:38 Another question on bind mounts without mtab Phillip Susi
@ 2014-01-13 8:48 ` Karel Zak
0 siblings, 0 replies; 2+ messages in thread
From: Karel Zak @ 2014-01-13 8:48 UTC (permalink / raw)
To: Phillip Susi; +Cc: util-linux
On Fri, Jan 10, 2014 at 09:38:20AM -0500, Phillip Susi wrote:
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>
> I've had another question come up about bind mounts and the lack of
> mtab and I'm not sure how to answer it because it does seem a more
> important use case that has been lost than those previously discussed.
>
> If /dev/sda1 is mounted in /, and you bind mount /home/foo to /mnt,
> then there is no way to tell from the output of mount that it is in
> fact, the /home/foo directory of /dev/sda1 that is in /mnt. It looks
> like you just bind mounted the whole drive there, and the subdirectory
> path is lost.
See findmnt output, the /proc/self/mountinfo contains info about the
mounted filesystem directory (usually '/', but /home/foo in your
example).
Note that I'd like to learn people to use findmnt(8) rather mount
output. The mount(8) output is there mostly for backward
compatibility.
Karel
--
Karel Zak <kzak@redhat.com>
http://karelzak.blogspot.com
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