Modern df lists the actual fs types for those 'none' devices. E.g.
udev, tmpfs, et al. I'm guessing the reason that '-x none' was not
excluding them in this old df version was because the type wasn't
literally 'none' but perhaps \0 or else was just not being displayed.
In any case, I no longer am reproducing this very old bug, so am closing
it out as fixed.
** Changed in: coreutils (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/843306
Title:
df ignores fs type none in options
Status in coreutils package in Ubuntu:
Fix Released
Bug description:
df appears to ignore the filesystem type "none" when specifying
options on the command line. Some example output:
gecko@magina ~> df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 16018264 5669900 9534672 38% /
none 2020908 652 2020256 1% /dev
none 2028632 68 2028564 1% /dev/shm
none 2028632 440 2028192 1% /var/run
none 2028632 0 2028632 0% /var/lock
/dev/sdb6 457072296 42896024 390958336 10% /home
[four different "none" systems]
gecko@magina ~> df -x none
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 16018264 5669900 9534672 38% /
none 2020908 652 2020256 1% /dev
none 2028632 68 2028564 1% /dev/shm
none 2028632 440 2028192 1% /var/run
none 2028632 0 2028632 0% /var/lock
/dev/sdb6 457072296 42896032 390958328 10% /home
[would expect "none" systems not to appear]
gecko@magina ~> df -t none
df: no file systems processed
[would expect only "none" systems to appear]
I have no idea on whether this behaviour is intentional, however I do know
that it causes a minor bug to appear in the munin package - the df plugin is
unable to ignore a bunch of filesystems even though it is configured to do so
by default.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: coreutils 8.5-1ubuntu6
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic x86_64
Architecture: amd64
Date: Tue Sep 6 23:48:25 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, user)
LANG=en_GB.UTF-8
SHELL=/usr/bin/fish
SourcePackage: coreutils
UpgradeStatus: Upgraded to natty on 2011-08-04 (33 days ago)
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