[SOLVED] Resuming build with lfs live-cd

grumpy.biatch · 12-30-2010, 08:29 PM

Hi,

I am using lfs live cd for building CLFS Version SVN-20100828-x86_64-Multilib. I was able to build till 10.4.1. Installation of Perl and had to quit due to few errors or possible mistakes on my part.

I wish to the chroot and start over. How do I find out what went wrong and rectify it. I am a BSD user and this is bit trivial for me.

Should I just mount the partition, 'export CLFS=/mnt/clfs' and chroot or I need to do something else.

Best,

Dave

Oliv' · 12-31-2010, 05:06 AM

Hello,

Just from memory, here is what you need to do (as root):

Code:

mount /dev/sda1 /mnt/clfs
mount -t proc none /mnt/clfs/proc
mount -o bind /dev /mnt/clfs/dev
chroot /mnt/clfs

So I have assumed that you just have one partition... maybe you will also need to mount boot, usr or another partition.
Another point: I am not sure if that step is mandatory, but you may have to do a "mount -o bind /dev/pts /mnt/clfs/dev/pts". But you will quickly know if that step is mandatory as it may complain about a missing pty or something like that during the chroot step if that's really mandatory.

Regards,

Oliv'

grumpy.biatch · 12-31-2010, 06:21 AM

Quote:

Originally Posted by Oliv'

Hello,

Just from memory, here is what you need to do (as root):

Code:

mount /dev/sda1 /mnt/clfs
mount -t proc none /mnt/clfs/proc
mount -o bind /dev /mnt/clfs/dev
chroot /mnt/clfs

So I have assumed that you just have one partition... maybe you will also need to mount boot, usr or another partition.
Another point: I am not sure if that step is mandatory, but you may have to do a "mount -o bind /dev/pts /mnt/clfs/dev/pts". But you will quickly know if that step is mandatory as it may complain about a missing pty or something like that during the chroot step if that's really mandatory.

Regards,

Oliv'

Hi Oliv',

Thanks a bunch. I have '/' and everything is in it.

Let me sum this up -

Code:

mount /dev/sdc2 /mnt/clfs
export CLFS=/mnt/clfs
mkdir -pv ${CLFS}
echo ${CLFS}
mount -v /dev/sdc2 ${CLFS}
mount -t proc none /mnt/clfs/proc
mount -o bind /dev /mnt/clfs/dev
mount -o bind /dev/pts /mnt/clfs/dev/pts (uncertain)
chroot "${CLFS}" /tools/bin/env -i \
    HOME=/root TERM="${TERM}" PS1='\u:\w\$ ' \
    PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin \
    /tools/bin/bash --login +h

Let me know if this is right or I am messing it up.

Best

Oliv' · 12-31-2010, 06:34 AM

Your first mount is useless... and may fail if /mnt/clfs does not exist as you do the mkdir after

And the mount /dev/pts is also probably useless. In fact, after thinking a bit about that, it would be useful only if use something like 'bin/login' instead of '/bin/bash' when running your chroot command.
Else it seems perfect

Best regards,

Oliv'

grumpy.biatch · 12-31-2010, 08:17 AM

Quote:

Originally Posted by Oliv'

Your first mount is useless... and may fail if /mnt/clfs does not exist as you do the mkdir after

And the mount /dev/pts is also probably useless. In fact, after thinking a bit about that, it would be useful only if use something like 'bin/login' instead of '/bin/bash' when running your chroot command.
Else it seems perfect

Best regards,

Oliv'

I will be using live cd so I need to create a directory and a mount point. Please let me know if this is correct-

Code:

mkdir -pv ${CLFS}
mount /dev/sdc2 /mnt/clfs
export CLFS=/mnt/clfs
echo ${CLFS}
mount -t proc none /mnt/clfs/proc
mount -o bind /dev /mnt/clfs/dev
chroot "${CLFS}" /tools/bin/env -i \
    HOME=/root TERM="${TERM}" PS1='\u:\w\$ ' \
    PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin \
    /tools/bin/login --login +h

grumpy.biatch · 12-31-2010, 09:03 AM

I applied mind to this during GCC test suit build and this is according to me should work -

Code:

1. Boot from LiveCD
2. Mount clfs partition
        export CLFS=/mnt/clfs
        mkdir -pv ${CLFS}
        mount /dev/sdc2 ${CLFS}
3.      swapon /dev/sda5
4.      Mount the virtual kernel filesystems
        mount -vt proc proc $CLFS/proc
        mount -vt sysfs sysfs $CLFS/sys
        mount -v -o bind /dev ${CLFS}/dev
        mount -f -vt tmpfs tmpfs ${CLFS}/dev/shm
        mount -f -vt devpts -o gid=4,mode=620 devpts ${CLFS}/dev/pts
5. Entering the chroot environment
        chroot "${CLFS}" /tools/bin/env -i \
        HOME=/root TERM="${TERM}" PS1='\u:\w\$ ' \
        PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin \
        /tools/bin/bash --login +h
6. Mount the rest
        mount -vt devpts -o gid=4,mode=620 none /dev/pts
        mount -vt tmpfs none /dev/shm
        cd /sources

Oliv' · 12-31-2010, 09:34 AM

this setup seems perfect... about your "doubtful" line, I also find it quite strange as to my knowledge a typical mount command is: "mount [option] device mount-point". But there might have evolution that I am not aware

Anyway, I think that you will quickly see if that command fails or not.

crts · 12-31-2010, 10:04 AM

Quote:

Originally Posted by grumpy.biatch

I applied mind to this during GCC test suit build and this is according to me should work -

Code:

1. Boot from LiveCD
2. Mount clfs partition
        export CLFS=/mnt/clfs
        mkdir -pv $CLFS
        mount /dev/sdc2 $CLFS
3.      swapon /dev/sda5
4. Mount the virtual kernel filesystems
        mount -vt proc proc $CLFS/proc
        mount -vt sysfs sysfs $CLFS/sys
5. Entering the chroot environment
        chroot "$CLFS" /usr/bin/env -i \
        HOME=/root TERM="$TERM" PS1='\u:\w\$ ' \
         PATH=/bin:/usr/bin:/sbin:/usr/sbin \
        /bin/bash --login
6. Populating /dev
        mount -nvt tmpfs none /dev/sbin/udevstart (this is doubtful)
        mkdir -v /dev/pts
        mkdir -v /dev/shm
        mount -vt devpts -o gid=4,mode=620 none /dev/pts
        mount -vt tmpfs none /dev/shm
7. Entering working directory
        cd /sources

Hi,

I haven't build CLFS yet, however, I think you should switch order of point 5. and 6., i.e.
do all the mounting before you chroot. There should also be no need to create directories like /dev/pts when you re-chroot. I am also not sure if

Code:

mount -nvt tmpfs none /dev/sbin/udevstart (this is doubtful)

is really necessary.
So here is what I would do:

Code:

1. Boot from LiveCD
2.      swapon /dev/sda5
3. Mount clfs partition
        export CLFS=/mnt/clfs
        mkdir -pv $CLFS
        mount /dev/sdc2 $CLFS

4. Mount the virtual kernel filesystems
        mount -vt proc proc $CLFS/proc
        mount -vt sysfs sysfs $CLFS/sys
5. Populating /dev
        mount -vt devpts -o gid=4,mode=620 none $CLFS/dev/pts
        mount -vt tmpfs none $CLFS/dev/shm
6. Entering the chroot environment
        chroot "$CLFS" /usr/bin/env -i \
        HOME=/root TERM="$TERM" PS1='\u:\w\$ ' \
         PATH=/bin:/usr/bin:/sbin:/usr/sbin \
        /bin/bash --login
7. Entering working directory
        cd /sources

It is basically the same procedure as for 'normal' LFS.

grumpy.biatch · 12-31-2010, 10:34 AM

Quote:

Originally Posted by crts

Hi,

I haven't build CLFS yet, however, I think you should switch order of point 5. and 6., i.e.
do all the mounting before you chroot. There should also be no need to create directories like /dev/pts when you re-chroot. I am also not sure if

Code:

mount -nvt tmpfs none /dev/sbin/udevstart (this is doubtful)

is really necessary.

I've not yet installed udev and in my opinion

Quote:

mount -nvt tmpfs none /dev/sbin/udevstart

is not necessary, trying wont hurt; it may return an error at most.

Thanks,

Dave

grumpy.biatch · 01-01-2011, 12:58 AM

Been there done that, it worked.

Thanks guys.