Extract root from Squashfs

[renwich]

I used to play with the sportster images a while ago, they were pretty easy to mod, but since the new Squashfs 3.0 LZMA was put into the CVS, I've never had success in being ably to re-compress the root and flash it back on

tonight however after a bit of trial and error I found out why.

following the TUT from PT-1's help file

Telnet to your Box


Please then check where your root is located

Example:
dev: size erasesize name
mtd0: 00020000 00004000 "BR bootloader"
mtd1: 00020000 00020000 "flfs (u-boot)"
mtd2: 007c0000 00020000 "root (jffs2)" our example might be different on your Image
mtd3: 007e0000 00020000 "flash without bootloader"
mtd4: 00800000 00020000 "complete flash"

Then make

mkdir /var/tmp/root

Then

mount -t squashfs -o ro /dev/mtdblock/2 /var/tmp/root
(MAKE SURE YOU CHECK BEFORE WHAT MTD ROOT IS!!)


Then

cd /var/tmp <<--- exactely like this; Do NOT change into /var/tmp/root !!!

Then

tar -cf root.tar root

Copy that file via FTP to your PC and add/mod the files you want changed.

tar -xf root.tar and mod it yourself within Linux and after that


all is well upto to this step


I use to use this to re-compress the image



mksquashfs root mtd3.img -be



and then flash the root back onto the box

but since LZMA this has always caused my box to hang on loading kernel

Tonight I found the following works, sorta obvious once you know Doh..!

/home/dbox(on-my-box)/tuxbox/dbox2/cdk/bin/mksquashfs-lzma root mtd3.img -be