Bug 19508

Summary:	Even in single-user mode /usr cannot be unmounted
Product:	Gentoo Linux	Reporter:	Marc Ballarin <ballarmc>
Component:	[OLD] Core system	Assignee:	Martin Schlemmer (RETIRED) <azarah>
Status:	RESOLVED WONTFIX
Severity:	minor	CC:	mr_bones_
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Marc Ballarin 2003-04-17 17:17:59 UTC

Under Gentoo, it's not possible to unmount the /usr filesystem. The reason is,
that bash always uses the following files in /usr, keeping the filesystem busy:

/usr/lib/locale/locale-archive
/usr/lib/gconv/gconv-modules.cache
/usr/lib/gconv/ISO8859-15.so (or similiar)

All these files are part of glibc.  While /usr/lib/gconv has a size of ~4.5M and
could easily fit in the root filesystem, locale-archive is over 18M in size.
It seems, that bash doesn't need gconv to run, since it works when I remove /usr
from fstab and reboot with the "single" option.

Reproducible: Always
Steps to Reproduce:
1.You need to have /usr on a separate partition/device
2. Switch to single user mode
3. try to umount /usr

Actual Results:  
umount: /usr: device is busy

Expected Results:  
/usr should have been unmounted

Comment 1 Martin Schlemmer (RETIRED) gentoo-dev

2003-04-21 15:53:00 UTC

Use sash ?

Comment 2 Martin Schlemmer (RETIRED) gentoo-dev

2003-04-27 21:41:15 UTC

Another alternative might be to compile bash without nls support.  I
however do not know if this is an idea that will be appreciated by all
users.

Comment 3 Martin Schlemmer (RETIRED) gentoo-dev

2003-08-03 06:53:26 UTC

Moving /usr/lib/gconf is not a good idea i think.