[Bug 891688] Re: mount -o remount always appends options to /etc/mtab even if they already exist
Martin Pitt
martin.pitt at ubuntu.com
Fri Dec 9 07:35:23 UTC 2011
Upstream (Karel Zak) says that this is pretty much wontfix for util-
linux, and man mount says that it doesn't try to parse mount options.
What pm-utils could do here is to remember the old mount options and use
this form instead, i. e. with explicitly specifying the directory:
The remount functionality follows the standard way how the mount
command works with options from fstab. It means the mount command
doesn't read fstab (or mtab) only when a device and dir are fully
specified.
mount -o remount,rw /dev/foo /dir
After this call all old mount options are replaced and arbitrary stuff
from fstab is ignored, except the loop= option which is internally
generated and maintained by the mount command.
(from man mount).
** Package changed: util-linux (Ubuntu) => pm-utils (Ubuntu)
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https://bugs.launchpad.net/bugs/891688
Title:
mount -o remount always appends options to /etc/mtab even if they
already exist
Status in “pm-utils” package in Ubuntu:
Triaged
Bug description:
I have an external usb HDD attached to my system to store parts of
/home. Every time I suspend and resume the laptop, mount appends a
subset of the mount options to the already existing list.
I currently have this in the output of mount:
/dev/sdc1 on /media/LaCie type ext4
(rw,nosuid,nodev,commit=600,commit=600,commit=0,commit=600,commit=0,commit=600,commit=0,commit=0,commit=0,commit=600,commit=0,commit=0,commit=600,commit=0,commit=600,commit=600,commit=0,uhelper=udisks)
/etc/fstab doesn't have a line for this disk.
---------
Reproducer:
$ sudo modprobe scsi_debug
# ATTENTION! MAKE TRIPLE-SURE ABOUT THE DEVICE NAME HERE!
$ sudo mkfs.ext4 /dev/sdb
$ sudo mount /dev/sdb /mnt
$ grep sdb /etc/mtab
/dev/sdb /mnt ext4 rw 0 0
$ sudo mount -o remount,commit=600 /dev/sdb
$ grep sdb /etc/mtab
/dev/sdb /mnt ext4 rw,commit=600 0 0
$ sudo mount -o remount,commit=600 /dev/sdb
$ grep sdb /etc/mtab
/dev/sdb /mnt ext4 rw,commit=600,commit=600 0 0
----------
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: mount 2.19.1-2ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
CheckboxSubmission: ebb646ad5c6c4ca2fe9420855758001f
CheckboxSystem: 7e42599bda39ea7ff8b528272b6ef52b
Date: Thu Nov 17 21:29:08 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64+mac (20110127)
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
LC_PAPER=a4
SourcePackage: util-linux
UpgradeStatus: Upgraded to oneiric on 2011-10-15 (33 days ago)
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