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spoofy
n00b
Joined: 28 Mar 2005
Posts: 58
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 Posted: Tue Jun 07, 2005 3:00 am Post subject: Trying to chroot to 32bit.... |
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| Quote: | bash-2.05b# linux32 chroot /mnt/gentoo32 /bin/bash
chroot: cannot run command `/bin/bash': No such file or directory
bash-2.05b# |
the guide at
http://www.gentoo.org/proj/en/base/amd64/technotes/index.xml?part=1&chap=4
doesnt say thing about this.. i do have bash installed so i'm not quite sure what is going on ..anyone? |
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whig
l33t
Joined: 27 Nov 2004
Posts: 973
Location: New Zealand
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| Posted: Tue Jun 07, 2005 4:31 am Post subject: |
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| Dumb question, but do you have a (complete?) 32 bit system under /mnt/gentoo32? |
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kabage
Guru
Joined: 31 Jan 2005
Posts: 340
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| Posted: Tue Jun 07, 2005 5:59 am Post subject: Maybe |
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I think whig is trying to say you need to make
sure you unzipped your stage1 2 or 3 before you chroot in otherwise there will be no bash
to login to
_________________
The solutions are easy. Its finding them that is hard.
Last edited by kabage on Thu Jun 09, 2005 4:30 am; edited 1 time in total |
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wnreynolds
n00b
Joined: 22 Nov 2004
Posts: 5
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| Posted: Tue Jun 07, 2005 6:32 am Post subject: |
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I think you need to be root. To do this as a normal user, you have to make linux32 setuid (WARNING! BIG SECURITY HOLE)
| Code: |
$ chmod 4755 /bin/linux32
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Following http://gentoo-wiki.com/HOWTO_AMD_64, I've set up a 32 bit chroot. I've also written a little script that allows you to launch 32 bit apps from
the kde/gnome desktop. This script assumes you have 2 home dirs - one 32 bit, one 64 bit, and that the 64 bit home is accessible (via mount -o bind) from the 32 bit chroot. The syntax is:
| Code: |
$ exec32 <unix socket display> <path to 64 bit home dir from 32 bit env or "false" if shared with 32 bit env> <32 bit dir to run in> <app and args to execute>
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For example, to launch 32 bit firefox from my kde desktop, I create an application shortcut and use the following for the command:
| Code: |
/bin/linux32 /bin/chroot /old /usr/local/bin/exec32 myHostName/unix:0 /home64/my64BitHome /home/my32BitHome firefox
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To launch a shell in the 32 bit env, create an application shortcut with the following:
| Code: |
konsole -e linux32 /bin/chroot /old /usr/local/bin/exec32 myHostName/unix:0 /home64/my64BitHome /home/my32BitHome bash -login
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You can now launch all your 32 bit apps from this console, and they should open fine on your desktop. The script uses xauth, so you shouldn't be compromising your X server security (although this trick definitely needs a setuid linux32).
Here is the script, exec32, put it somewhere in your 32 bit env (I use /usr/local/bin/exec32).
| Code: |
#!/bin/sh
# This script is run from the 32 bit environment with 4 args:
# 1) The display in the 64 bit environment
# 2) The path in 32 bit environment to the dir containing the .Xauthority
# from the 64 bit environment
# 3) The directory to execute the program in in the 32 bit environment
# 4) The name of the file to be executed in the 32 bit environment
DISPLAY=$1
shift
HOME_64=$1
shift
NEWDIR=$1
shift
EXE=$*
if [ ! "$HOME_64" = "false" ]; then
HOST_AUTH=$(xauth -f ${HOME_64}/.Xauthority list | grep ${DISPLAY})
xauth add ${HOST_AUTH}
export DISPLAY=$DISPLAY
fi
cd ${NEWDIR}
exec $EXE
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spoofy
n00b
Joined: 28 Mar 2005
Posts: 58
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| Posted: Tue Jun 07, 2005 7:54 pm Post subject: |
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| whig wrote: | | Dumb question, but do you have a (complete?) 32 bit system under /mnt/gentoo32? |
the directions in the guide simply stated to emerge various packages ..which i did |
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spoofy
n00b
Joined: 28 Mar 2005
Posts: 58
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| Posted: Tue Jun 07, 2005 8:00 pm Post subject: |
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| wnreynolds wrote: | I think you need to be root. To do this as a normal user, you have to make linux32 setuid (WARNING! BIG SECURITY HOLE)
| Code: |
$ chmod 4755 /bin/linux32
|
Following http://gentoo-wiki.com/HOWTO_AMD_64, I've set up a 32 bit chroot. I've also written a little script that allows you to launch 32 bit apps from
the kde/gnome desktop. This script assumes you have 2 home dirs - one 32 bit, one 64 bit, and that the 64 bit home is accessible (via mount -o bind) from the 32 bit chroot. The syntax is:
| Code: |
$ exec32 <unix socket display> <path to 64 bit home dir from 32 bit env or "false" if shared with 32 bit env> <32 bit dir to run in> <app and args to execute>
|
For example, to launch 32 bit firefox from my kde desktop, I create an application shortcut and use the following for the command:
| Code: |
/bin/linux32 /bin/chroot /old /usr/local/bin/exec32 myHostName/unix:0 /home64/my64BitHome /home/my32BitHome firefox
|
To launch a shell in the 32 bit env, create an application shortcut with the following:
| Code: |
konsole -e linux32 /bin/chroot /old /usr/local/bin/exec32 myHostName/unix:0 /home64/my64BitHome /home/my32BitHome bash -login
|
You can now launch all your 32 bit apps from this console, and they should open fine on your desktop. The script uses xauth, so you shouldn't be compromising your X server security (although this trick definitely needs a setuid linux32).
Here is the script, exec32, put it somewhere in your 32 bit env (I use /usr/local/bin/exec32).
| Code: |
#!/bin/sh
# This script is run from the 32 bit environment with 4 args:
# 1) The display in the 64 bit environment
# 2) The path in 32 bit environment to the dir containing the .Xauthority
# from the 64 bit environment
# 3) The directory to execute the program in in the 32 bit environment
# 4) The name of the file to be executed in the 32 bit environment
DISPLAY=$1
shift
HOME_64=$1
shift
NEWDIR=$1
shift
EXE=$*
if [ ! "$HOME_64" = "false" ]; then
HOST_AUTH=$(xauth -f ${HOME_64}/.Xauthority list | grep ${DISPLAY})
xauth add ${HOST_AUTH}
export DISPLAY=$DISPLAY
fi
cd ${NEWDIR}
exec $EXE
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thanks |
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Gentoo on AMD64
