eject cd before reboot?

RobertDavid · Posted: Wed Nov 16, 2005 8:16 pm Post subject: eject cd before reboot?

How to do script to wait for ejecting CD from drive befre livecd shuts down and than press a key to shutdown/reboot,

I have tryed to add these lines to /etc/init.d/reboot.sh

i92guboj · Posted: Wed Nov 16, 2005 8:22 pm Post subject:

I have one, but never tested it, so it might work, of might not.

You can try to put it in the /etc/conf.d/local.stop file. Just make sure that the service "local" is used on boot (rc-update add local default). On startup local reads local.start, and when it is turned off in shutdown it should read local.stop, but I cant confim this. Just try it and see if you can get some usefull result...

RobertDavid · Posted: Thu Nov 17, 2005 5:20 pm Post subject:

So I tryed that but didnt work:( Because local is stoping at first (so nothing is unmounted and I dont know what to unmount coz it should be anytime different).

So I need to change somehow stoping scripts, maybe not to remount filesystems readonly,,

The best way will be to look at knoppix, I will try to find that.. Is there some way how decompress knoppix image directly on disk or mount it somehow?
_________________
Arch & Fluxbox & 2.6.24-rc-zen!!!!
robertek.brevnov.net

i92guboj · Posted: Thu Nov 17, 2005 5:49 pm Post subject:

Knoppix uses a compressed fs image. I think that it is squashfs, wich can be compiled into the linux kernel. So, select squashfs into your kernel, recompile it, reboot and try to mounc that image into any other place with the -oloop option and -t squashfs type. That should work.

nativemad · Posted: Sun Dec 04, 2005 8:26 pm Post subject:

Did you get this working? I'm searching for quite a while now...

Omega21 · Posted: Mon Dec 05, 2005 3:37 am Post subject:

An init script maybe?
_________________
iMac G4 1GHz :: q6600 //2x 500GB//2GB RAM//8600GT//Gentoo :: MacBook Pro//2.53GHz

i92guboj · Posted: Mon Dec 05, 2005 3:53 am Post subject:

When 6th goes bored...

nativemad · Posted: Mon Dec 05, 2005 12:30 pm Post subject:

A simple init-script does not work on a Live-CD... The root is still mounted when you call the script (and it will not be the last script wich is called...

, so it will not eject!

You have to put 'eject' and its libs in the initrd and call it somewhere in the shutdown scripts... but where, which script?!? I always get a "failed to unmount"!

i tried /etc/init.d/shutdown.sh and /etc/init.d/halt.sh wich seems to be very interesting... but i had no luck so far!

i92guboj · Posted: Mon Dec 05, 2005 5:23 pm Post subject:

carl.anderson · Posted: Fri Jan 06, 2006 8:31 pm Post subject: well, sorta

I was able to do something "almost" right. I but the binary for eject into the squashfs filesystem, but I'm still not able to eject the cd while it's mounted.

So I can umount -l /mnt/cdrom and then eject, but I get all kinds of error messages after that. Apparently the system is depending on files that are on the CDrom.

I would like to mount the entire squashfs onto a hard drive once I've booted from the cdrom.

If I copy the squashfs file, how can I switch into that image and cleanly unmount the cdrom?

gieltje · n00b Joined: 14 Aug 2004 Posts: 59

Little late bump, but anyways.

Has anyone found a way to do this (using genkernel)?

carl.anderson

Sorry I didn't post this before.

Among the kernel boot options there is a 'docache' option. This forces the squashfs file to be copied to ram on boot up. If you want to eject the cd before reboot you need this. You can add it to the default kernel options if you want.

I'm assuming you know how to copy the livecd iso, modify a file and create a new iso to test. When I was hacking livecds I used an RW until I got it right. The newer livecds actually include the eject binary, so all you need to do is make sure the docache option has been used.

Then take a look at /bin/bashlogin. This is a script that is launched on all seven terminals to drop you into a bash prompt. If you can script, you can do practically anything you want by modifying this file. Although I warn you, to edit this file you need to know a little more.

To see the file you have to be able to extract the contents of the squashfs file on the livecd. You need FUSE enabled in your kernel to use squashfs. emerge squashfs-tools. You will find tools to mount a squashfs filesystem and create a new one. You basically need to do this (as root):

gieltje · n00b Joined: 14 Aug 2004 Posts: 59

would it not be possible to add a minimalist image to the memory instead of the whole cd with just eject and needed library's?

carl.anderson · Posted: Fri Sep 07, 2007 4:27 pm Post subject:

It's actually not the whole cd; it's only the 50MB squashfs file. So unless you are working on an embedded system with less than 50MB of RAM - loading the squashfs file is not a very big deal. Frankly I'm surprised it's not the default behavior.

gieltje · n00b Joined: 14 Aug 2004 Posts: 59

carl.anderson · Posted: Fri Sep 07, 2007 7:13 pm Post subject:

Are you using mksquashfs to customize your squashfs filesystem? Are you putting extra stuff in there?

When I was hacking install cds I was working with the minimal isos. I don't have a lot of experience with the 'live' cds, so they may be different than I expect. If that's the case, you might open a bug as a feature request and let the developers look into it.

gieltje · n00b Joined: 14 Aug 2004 Posts: 59