Re: /sbin/init

On Thu, 23 Nov 2006 13:50:51 -0700 Perianayagam Somasundaram <somu@xxxxxxxxxxxxxx> wrote:
| On Thu, 23 Nov 2006, Jerry Peters wrote:
|
|> Kaz Kylheku <kkylheku@xxxxxxxxx> wrote:
|>> Pascal Bourguignon wrote:
|>>> When init is run, no file system has been mounted yet (but of course
|>>> the root file system where /sbin/init is, but it may be mounted
|>>> read-only). And no service, like syslog is running yet either.
|>>
|>> init can dump messages to the console.
|>>
|>> The only time I've needed debug from init, it was actually from its
|>> ld.so interpreter.
|>>
|>> To do that, I added LD_DEBUG to the list of enviornment variables that
|>> are permitted on the kernel command line and recompiled the kernel.
|>
|> I don't understand why you needed to recompile the kernel, any strings
|> that look like keyword=value that are not recognized as kernel parameters
|> are passed to init as environment variables.
|> I use this extensively in my initramfs startup script.
|>
|> Jerry
|>
|
| Nope. Kernel has not boot params passed thru GRUB atleast. I am
| just worried about the console initialization and whether that
| was done correctly. The only reason I think /sbin/init or /bin/sh
| is hanging is because they are not able to grab the terminal.

If you are manipulating devices somewhere along the way, such as with
initrd, initramfs, etc, be sure that /dev/console is in fact available
to be opened. I left out a /dev/console in one of my init replacements
that was juggling filesystems around ahead of time (something that will
eventually move to initramfs), and not-so-strangely, no output appeared.

--
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| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
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