32-Bit Chroot How-To

[Joybin]

Currently when the do_chroot script passes program arguments to the chroot, it does not protect special characters from being interpreted by the shell

You can use this shell script as do_chroot to protect most special characters, except for continuous backslashes.

#!/bin/sh
args="`echo $0 | sed 's|^.*/\(.*\)\(32\)*$|\1|'`"
for arg; do
    args="$args `echo $arg | sed 's|\([^-_a-zA-Z0-9]\)|\\\\\1|g'`"
done
/usr/bin/dchroot -d "$args"

[petriborg]

Here is an update to make the whole do_dchroot process easier.

#!/bin/sh
args="`echo $0 | perl -e '$_=<>; s/^.*\/(.*?)(32)?$/\1/; print; '`"
for arg; do
    args="$args `echo $arg | sed 's|\([^-_a-zA-Z0-9]\)|\\\\\1|g'`"
done
if [ -e /usr/bin/linux32 ]; then
    /usr/bin/linux32 /usr/bin/dchroot -d "$args"
else
    /usr/bin/dchroot -d "$args"
fi

Because of the change in do_dchroot step five becomes simpler:

• dchroot -d
• sudo apt-get install synaptic
• sudo ln -s /usr/sbin/synaptic /usr/sbin/synaptic32 (DELETE, NO LONGER NEEDED)
• exit
• sudo ln -s /usr/local/bin/do_dchroot /usr/local/bin/synaptic32
• sudo synaptic32

This is a small change to the regex to allow this. This makes one assumption, the 64 bit program is not visible from within the 32bit chroot - which would make sense, after all we just spent all that time making a seperate area for the 32 bit programs! If there is no 32 at the end of the name it will ignore it and try and launch the program in the chroot anyway. The corrected handling of 32 required a non-greedy operator which I don't think seds can do (which is why it now uses perl).

I also added a check for linux32 for those that need to do compiling in the chroot, this should automatically run the chroot with linux32 in front if it exists.

[petriborg]

On a side note, you can *also* add another detail, under Dapper, if you add a file named "debian_chroot" to the /chroot/etc directory, the default profile will append the content of the file at the start of the PS1 variable. For example, if you put "dapper32" in the file it displays: (dapper32)petri@linuxbox:~$

How cool is *that*

[hacktorious]

I followed the directions from this thread. I am running the sudo synaptic32 command and getting the following error message:

scott@zeus:~/downloads/BasicStamp$ sudo synaptic32
I: [edgy chroot] Running command: “synaptic32 ”

(synaptic32:29339): Gtk-WARNING **: Locale not supported by C library.
Using the fallback 'C' locale.


Does anyone know what is going wrong here and how I can fix it? Thanks.

I am running Kubuntu 6.10.

[babwe]

im running Ubuntu 6.06 LTS on a 64-bit pc
getting this error in step 1 line 5
Failure trying to run: chroot /chroot dpkg --force-depends --install var/cache/apt/archives/base-files_3.1.0ubuntu3_i386.deb var/cache/apt/archives/base-passwd_3.5.9_i386.deb
dont know what t do

note: Im trying to run xchat with support of http://fish.sekure.us/. cant get that t run on the pc

[gbajosh]

HI!

I am very new to Linux, but am enjoying learning about it. When I try to do this I get this

josh120@josh120-desktop:~$ sudo apt-get install dchroot debootstrap
Password:

Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package dchroot


Whenever I try to apt getupdate it never connects. Same with Add/remove, it says "Downloading 1/35" and does nothing. I have been working on this 1 problem for a few days now and am lost.

PLEASE HELP!

Thanks so much

[kragen]

hey, nice guide - worked a treat for me, simply had to install an extra package to get around a locale problem, but apart from that it was plain sailing

two things:

1) All my apps look ugly How do I go about installing gtk themes in the chroot, is there any way to get the chroot to use the same themes as the rest of my desktop via another fstab mount point or something similar?

EDIT: Answered my own question here: http://www.ubuntuforums.org/showthread.php?t=307194

2) someone else earlier mentioned using "sudo mount --bind /etc/passwd /usr/chroot32/passwd" etc... as a neater way than simply copying all the required files, I'm a perfectionist and woud quite like to do this but all I get is:

mount: mount point /usr/chroot32/passwd does not exist

Should this work? I've seen this in another guide, so I'm geusing there is a way of making it work...

Thanks

[cibercol]

http://lambda-complex.blogspot.com/2...86-en-una.html
correction for locales problem

[dukeleto]

Hi all,

my chroot edgy32 under edgy 64 works, except I am unable to install dbus; I get an error
stating that "/etc/init.d/dbus start" fails; has anyone come across this or does anyone have an idea of what to do? dbus is kinda necessary for what I wanted to do!
many thanks,

Olivier

[petriborg]

2) someone else earlier mentioned using "sudo mount --bind /etc/passwd /usr/chroot32/passwd" etc... as a neater way than simply copying all the required files, I'm a perfectionist and woud quite like to do this but all I get is:

mount: mount point /usr/chroot32/passwd does not exist

Should this work? I've seen this in another guide, so I'm geusing there is a way of making it work...

Thanks

Sorry Kragen, no you can't do that, mount will only do that for folders to my knowledge.