Re: [uml-devel] Any way to give /dev/console a controlling TTY?

[Rob Landley <rob@landley.net>]

On Sunday 25 September 2005 07:49, Henrik Nordstrom wrote:

> The ctty program mentioned has only been truly tested from inittab. Does
> not seem to work proper when used as init= so it's probably missing some
> process group thing or similar. Did work when executed interactively from
> a init=/bin/sh shell however.

I tried it.  I did the following:

./linux rootfstype=hostfs rw init=/bin/sh LD_ASSUME_KERNEL=2.4.1
#/path/to/ctty /bin/sh

And although it did give me a nested shell invocation, it made no difference 
that I could see as far as ctrl-c went.

> To be honest it skips quite many steps in 
> the terminal initialization compared to how getty etc opens their
> terminal.

It's obviously a quick hack or it wouldn't segfault when you ran it with no 
arguments.  I don't hold that against it.

The thing is, all the various invocation methods you've mentioned are attempts 
to give a controlling tty to something _other_ than /dev/console.  The 
various virtual terminals, for instance.  I haven't figured out how to get 
those to attach to fd:0,fd:1 so that I have ctrl-c working on stdio of the 
UML instance, so getting ctrl-c working on them doesn't help me.  (I could 
just use init.)

I can fiddle around and create an initramfs to do all sorts of complicated 
things if necessary, and probably will, but it would be nice if there was an 
easy solution...

> Regards
> Henrik

Rob


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