Bug#588324: busybox: Please include cttyhack and setsid to enable ^C in initramfs shell

[Taisuke Yamada <tai@rakugaki.org>]

Hi (and excuse me for loooong delay in response).

> See also http://bugs.debian.org/528234 ;)
> Is it really needed?  Maybe setsid is enough?

No, it is not enough. While D-I may not be using it, cttyhack is
essential to enable job control (i.e. ^C). This is really needed for
initramfs hacking/debugging, which requires serious interactive
shell session.

And setsid only won't do. Try doing

  (initramfs) setsid sh
  ...
  (initramfs) sleep 5
  ^C <- this won't work

and compare it with

  (initramfs) setsid cttyhack sh
  ...
  (initramfs) sleep 5
  ^C
  (initramfs) <- returns immediately

Best Regards,

>> Because current debian build of busybox (and busybox-static) does not
>> include 'cttyhack' and 'setsid', it is impossible to use ^C and other
>> job control feature in initramfs shell.
>>
>> - http://lists.busybox.net/pipermail/busybox/2008-January/029936.html
>>
>> As you can see in above URL, enabling CONFIG_SETSID and CONFIG_CTTYHACK
>> would be a big plus, as then you can interrupt command in case it doesn't
>> return (like "ipconfig -c dhcp" or "ping"). Being forced to reboot just
>> because of one "inappropriate" command is not a very happy option.
>
> See also http://bugs.debian.org/528234 ;)
>
> Is it really needed?  Maybe setsid is enough?
>
> /mjt
>