[Pkg-sysvinit-devel] Bug#575204: initscripts: grep complains about invalid back reference in umountfs

[Sven Joachim]

On 2010-03-24 10:15 +0100, Petter Reinholdtsen wrote:

> [Sven Joachim]
>> Upon a reboot, I noticed grep complaining about an invalid back
>> reference.
>
> Interesting.  I did not show up when I tested it, so I suspect it is
> related to your setup.

That's why I sent the contents of /proc/mounts.

>> Running this script leads to a "grep: Invalid back reference" error
>> message here.  For the reference, these are the contents of
>> /proc/mounts:
> [...]
>> | /dev/disk/by-label/\134x2f / ext2 rw,relatime,errors=remount-ro,barrier=1,data=writeback 0 0
>
> This is the only one I can imagine lead grep to look for a
> back-reference (the \134 part).
>
> This sound a bit like the udev/mount incompatibility, where mount and
> udev encode special characters differently.
>
> Not quite sure how to fix it properly.  What kind of device is this?

A normal hard disk partition, /dev/sda1.

,----
| % ls -l /dev/disk/by-label
| total 0
| lrwxrwxrwx 1 root root 10 Mar 24 13:12 \x2f -> ../../sda1
| lrwxrwxrwx 1 root root 10 Mar 24 13:12 \x2fhome -> ../../sda8
| lrwxrwxrwx 1 root root 10 Mar 24 13:12 \x2fusr -> ../../sda6
| lrwxrwxrwx 1 root root 10 Mar 24 13:12 \x2fusr\x2flocal -> ../../sda7
| lrwxrwxrwx 1 root root 10 Mar 24 13:12 \x2fvar -> ../../sda5
| lrwxrwxrwx 1 root root 10 Mar 24 13:12 swap -> ../../sda2
`----

> How can I reproduce the setup leading to such strange device name?

Create a label "/" for your root filesystem, e.g. with
"e2label /dev/root /", and reboot with "root=LABEL=/"
in the kernel commandline.

Sven