Can I create a CD with an ACL enabled kernel?

Forum: Other Help Topics
Topic: Can I create a CD with an ACL enabled kernel?
started by: msteinbo

Posted by msteinbo on Dec. 13 2005,12:07

Hi everybody,

as my local filesystem(s) are containing ACLs (< http://acl.bestbits.at >) and it is not wise to mount them without ACL support , I'd like to create my own boot cd with an updated kernel (above link provides a patch for kernel 2.4.x) and SYSLINUX.

BTW: Compiling the kernel is no problem at all - possibly I can use the already compiled kernel from my PC.

Any ideas how to do that?

Greetings

Markus

PS: This would also be an idea for new releases of DSL Linux.

Posted by clacker on Dec. 13 2005,19:40

I'd be interested in seeing a kernel recompilation howto as well. It looks like it should be easy, but when I try it it doesn't work.

I see that in the download section there are sources so I got linux-2.4.31.tar.gz, dsl.config, and knoppix-kernel.patch

I installed three extensions: dsl-dpgk.dsl, gnu-utils.dsl, and gcc1.dsl. I made a source directory to put the files in, and downloaded libncurses5-dev and patch:

Code Sample

sudo su
mkdir /usr/src
chmod 775 /usr/src
chown dsl /usr/src
chgroup staff /usr/src
chgrp staff /usr/src
apt-get update
apt-get install patch libncurses5-dev
exit

Then I copied linux-2.4.31.tar.gz, dsl.config, and knoppix-kernel.patch into /usr/src. I untared the linux package, copied the dsl configuration to the linux directory.

I had to modify the patch before I could use it. Has anyone else run into this? Should we change the patch to be a "dsl-2.0.patch?" I had to change two lines that had gcc-2.95 to plain old gcc to avoid error further on.

Code Sample

cd /usr/src
tar -xzvf linux-2.4.31.tar.gz

beaver knoppix-kernel.patch
# save as knoppix-kernel.patch2
# change gcc-2.95 to just gcc in 2 places and save the new file
# I had to do this to avoid errors

patch -p1 -d linux-2.4.31 < knoppix-kernel.patch2
cp dsl.config linux-2.4.31/.config
cd linux-2.4.31

then I ran the three parts of the makefile, which I though would result in a bzImage that would be identical to the one in dsl (linux24) but it was slightly larger. Why would that be?

Code Sample

make menuconfig
make dep
make bzImage

# now the new kernel bzImage is waiting in
# /usr/src/linux-2.4.31/arch/i386/boot/bzImage

then I made a newcd, replacing the old linux24 with a renamed bzImage but the cd didn't work (started, but couldn't write to ld.so.cache, write only file system).

Code Sample

cd /home/dsl
mkdir newcd
mkdir newcd/KNOPPIX
cp -Rp /cdrom/boot newcd
cp -Rp /cdrom/lost+found newcd
cp -p /cdrom/index.html newcd
cp /cdrom/KNOPPIX/KNOPPIX newcd/KNOPPIX
sudo cp /ramdisk/usr/src/linux-2.4.31/arch/i386/boot/bzImage newcd/boot/isolinux/linux24
# note the kernel name is now linux24

# what follows is all on one line
sudo mkisofs -no-pad -l -r -J -no-emul-boot -boot-load-size 4 -boot-info-table -b boot/isolinux/isolinux.bin -c boot/isolinux/boot.cat -hide-rr-moved -o mydsl.iso newcd
# line ends

It would be nice to know how this can be done. I'd also recomend fixing the patch so that it actually works with dsl.

I also had problems using the libncurses5.dsl and libncurses5-dev.dsl packages. I had loaded libc.dsl and libc-dev.dsl and kernel sources.dsl first, created my /usr/src directory, and make menuconfig worked fine. After the patch it would fail because it couldn't find the libncurses5 libraries.