I am not sure what you mean. libdevmapper is a dependency for cryptsetup for almost 2 years now: http://hg.slitaz.org/wok/rev/e7272bdeb3bd

Maybe you update your system.

i'm using slitaz cooking 20100221. cryptsetup requires libdevmapper but give me this error:

root@slitaz:/home/tux# cryptsetup luksOpen /dev/disk/by-uuid/8c02a1c4-dac1-4385-9d69-ef6d5faf36eb cryptohome        
Command failed: No setup backend available

that, if i get it right, means that cryptsetup can't use libdevmapper because have been built without libdevmapper support:
http://www.linuxquestions.org/questions/linux-security-4/cryptsetup-luks-error-491282/
archlinux's cryptsetup works right.

Hi ernia,

I am not the maintainer for this pkg but crypstsetup is definitely built with libdevmapper support. There must be some other problem like udev.

I have updated the pkg now and use lvms2 pkg to split libdevmapper as per the new guidelines on device_mapper site.

http://hg.slitaz.org/wok/rev/efd761ce4594
http://hg.slitaz.org/wok/rev/92bad8adb911

Can you help to see if this work? There is also "udev" rules now. Let me know if you find any difference in Arch's pkg and slitaz pkg. Would you be able to help debug this problem?

Thanks

The problem is still present after tazpkg upgrade. I would like to help you to debug the problem but i'm not a developer and i think i'm not smart enough to help you. i just install from slitaz repositories linux-md and cryptsetup with all the dependencies, modprobe dm-crypt and try the command above. after the error i remove cryptsetup, download the archlinux cryptsetup from http://mi.mirror.garr.it/mirrors/archlinux/core/os/i686/cryptsetup-1.1.0-2-i686.pkg.tar.gz and then convert and install it with tazpkg convert and tazpkg install. after this procedure the command works, so i thought that the problem was limited to the crypsetup package. you can find more info about archlinux cryptsetup here: http://www.archlinux.org/packages/core/i686/cryptsetup/
if you want me to make some more test let me know.

Hi guys, I did discover this a couple of months ago and sent some code to the devs for mountbox, but forgot to update the receipt.

My bad.

Paul

http://hg.slitaz.org/wok/rev/e1cbfcb07467

Hi,

I don't know how cryptsetup is supposed to be compiled, but it's a fact that it's compiled without the option --enable-libdevmapper :

compile_rules()
{
	cd $src
	./configure --prefix=/usr $CONFIGURE_ARGS &&
	make &&
	make DESTDIR=$PWD/_pkg install
}

EDIT : I just see you're link Paul. I guess it's fixed now

Yes, this is strange. It should auto-enable the feature once it detects *-dev file but it does not. There is no compile option "--enable-libdevmapper" in "configure -h".

Even Arch's PKGBUILD does not enable it and yet it works:
http://repos.archlinux.org/wsvn/packages/cryptsetup/repos/core-i686/PKGBUILD

Anyway's I think its ok. Can try upgrading to see if it works?

I've tested it right now, it works, but it seems that libreadline (readline) is required to open luks partitions and not installed as a dependency. It gives me an "error loading libreadline.so.6" which disappear installing the readline package.
Thanks

Fixed: http://hg.slitaz.org/wok/rev/06c240988a31