Editing the read-only parts of an image

[scruff1963]

Not sure as I won't put gemini on my box (clone killer) but is'nt gemini a maxvar image ?

Not sure if this method works with maxvar images ? you could try specifying the blocksize with -b <blocksize> , I think the default is 65535
./mksquashfs -help
will give more info


Another thing to check is that you have the correct version of mksquashfs.

[baderh]

how to know which version i have to use? i used 2 versions and still same...

maybe as you said... i have to mention the size also... once i reach home i will give it a try....

[drhg]

how to know which version i have to use? i used 2 versions and still same...

maybe as you said... i have to mention the size also... once i reach home i will give it a try....

just use mksquashfs with lzma patch & all will be ok
note that all squashfs parts in the recent images need mksquashfs with lzma patch to be recompressed in right way ( pli needs mksquashfs 3 with lzma)
hope this help
cheers

drhg

[exclusive2020]

Devilfish hi

how i can extract all xxxx.img and compress this after edit enything
plase

[redmarx]

this method works with mtd0 too?

[micromouse]

22222222222222222222222222222222

[PDApunch]

Hi All

Perhaps the ones who got this to work could let us know which distro they are using and any additional software they installed on there x86 machine.

I couldn't get this to work with Slax 6.1.1 mounted on HDD which has squashfs-lzma 3.x support built in. I don't know how to check if the byte order patch has been built in to squashfs? PPC big endian, x86 little endian.

I did get a different solution working tho using the dreambox itself to put the image back together after editing.

1. On the dreambox mount an NFS share to your x86 machine.

2. Create a swap file, format it and turn on swap.

3. Put your tools and image you want edit in the mounted HDD.

4. Now you can open a complete image, edit it then pack it back together again.

Tools and scripts needed:

mkcramfs
mkdreamboxfs
mksquashfs
uncramfs
undreamboxfs

NOTE: The tools I have will not pack it as the same version of squashfs as the newest images, so the image will be slightly larger, but I can CONFIRM this works.

PS
This is not a tutorial, just a summary of what I did to edit an image. If there is much interest I will try and document more of what I did.

Best regards

[badboy123]

I followed the steps by devilfish using ubuntu 9.04...

I got upto "
./mksquashfs root mtd5.img -be
After putting in that command I got the following error:

bash: ./mksquashfs: No such file or directory

So I tried the above command without "./" at the begining of mksquashfs and it created the image...I then typed the following in telnet:

cd /tmp && eraseall /dev/mtd/5 && cp mtd5.img /dev/mtd/5 && reboot

It erased successfully but then gave the error:

cp: Write Error: No space left on device

I did not make many alterations...I also tried the above process without any changes but still got the above error...

Any suggestions on how to resolve this? Thanks

[PDApunch]

@badboy123

Try a reboot of the dreambox before you FTP mtd5.img back to the dreambox, lets us know how you get on.

[badboy123]

I tried rebooting before I uploaded the image but still the same issue...do you have any other suggestions?

Thanks

[PDApunch]

@badboy123

What is the size of your .img file?

[badboy123]

5.29 MB...This transfers across with no problems

[duracell]

Are you using mksquashfs from the the dreambox cdk?

 /home/ubuntu/tuxbox-cvs/root/cdkflash/mksquashfs

[badboy123]

I wasnt using that mksquashfs...tried it with that and managed to sort it out...

Thanks.

[Wizard1]

Black Screen issue

Hi Guys

I too kept experiencing the blank screen issue after following the Devilfish Tut. I found that the problem was down to the wrong mksquashfs file. The one attatched works perfect for me. Put it on my Desktop (Ubuntu) along with the tuxbox-cvs & root directory. The ''./mksquashfs'' is a correct command. A big thanks to Devilfish for an excellent Tut.

Regards

Wizard