Re: Backspace is not working in a chroot environment

[L A Walsh]

RAJESH DASARI wrote:
> Hi ,
>
> I did chroot on my environment and  after i switched to the chrooted
> directory ,backspace key is not working properly , when i enter
> backspace it is taken  as a "space".
>   
---
   This is not likely a coreutils issue, but likely a behavior
of the how your chroot environment is different from your default
environment.

According to the trace you included below, the BackSpace key
it is being interpreted as the "DELETE" (DEL) key, not as
"BACKSPACE" (BS) or 0x08 (\010).

To see values for the erase key, use "stty -a|grep erase".

Try that before and after you chroot.

After chroot, you'll likely see erase = ^H, when you
probably want it to be 'erase = ^?'. To set it,
just type:

 stty erase KEY

(where you press your backspace key where it says KEY).
If your KEY has a special meaning (like it was mapped to
some function, you'd have to press "control-v" before they
key to get the literal key).

Likely, when you chroot, some init script is
run to set keys like 'erase' to some default value, but some
other script that sets it to your *desired* value isn't
getting run (example: maybe a system /etc/profile gets
run when you 'chroot', but your normal user init-script
isn't run).  It depends on what shell you are running
and what the differences are between your normal and your
chroot environment are.

You can temporarily fix it by resetting the key used for 'erase'
(using stty), and/or find the differences in your normal
and chroot environments and make sure the chroot environment
calls a script to re-set the key to your desired value.