Bug#1026027: graphical installer: using nano in a installer shell fails

[Philip Hands <phil@hands.com>]

Holger Wansing <hwansing@mailbox.org> writes:

> - start the installer 
> - choose 'Graphical expert install'
> - 'Execute a shell'
> - call 'nano /etc/fstab'
> ---> Error opening terminal: xterm.

That would seem to be because $TERM is set to 'xterm', whereas there's
no terminfo file available for xterm.

Under /lib/terminfo/*/ we have:

  ansi  dumb  linux  screen  vt102

and there's also /usr/share/terminfo/b/bterm

In the F1-F3 consoles it's set to 'linux' (as expected), in the text
installer, TERM is set to 'bterm' -- these work.

So as a workaround, one can set e.g: TERM=bterm and then nano works in
the graphical install's shell.

On the 11.5 netinst I just tried out, in the Graphical Install's shell,
TERM=xterm so that's obviously not the cause of the issue, but the
difference would appear to be that it has:

  /usr/share/vte/termcap-0.0/xterm

So I guess the fix for this is either to make sure that that termcap
file gets installed again, or to set TERM in the Graphical Install's
shell to something like 'bterm' or 'vt102'.

I suspect restoring the termcap file is the correct fix.

Cheers, Phil.
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