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should df looked at /proc/mounts on linux?
From: |
Marty Leisner |
Subject: |
should df looked at /proc/mounts on linux? |
Date: |
Sun, 13 Apr 2008 06:33:25 +0000 |
I had a "head-scratching" incident when dealing with applications
which called umount(2) and then trying to run df to see what is done.
/proc/mounts is the kernels idea of what's mounted, /etc/mtab is manipulted
in user space.
df uses calls with look at /etc/mtab.
I've heard of a technique to link /etc/mtab to /proc/mounts, which
seems like a good idea (I've never seen a distribution which does this).
When /etc/mtab is out of sync with /proc/mounts, strange things start
happening regarding user space information
(doing df was obviously wrong, so was mount(1).
Should df start by seeing if /proc/mounts exists, and then
using it if it does (falling back onto /etc/mtab?)
marty
- should df looked at /proc/mounts on linux?,
Marty Leisner <=