[ILUG] clean console exits

[Pádraig Brady]

I noticed a couple of issues with killing console programs
on my linux systems lately.  Well issue 1 started bugging me
in the last couple of years, while I've only noticed issue 2
since Fedora 14, and it doesn't happen on my gutsy system at least.
I've not looked at these closely at all, so perhaps someone
knows of a config setting I should be using.

1. Ctrl-C prints ^C

Printing ^C just mangles output that I very often want to read
or copy/paste. Now I can get bash >= 4.1 to not print ^C
by putting 'set echo-control-characters off' in my .inputrc
But that only works on the bash command line itself, and
doesn't work when I'm running a command (sleep 100, for e.g.).
Now I can get the tty not to echo the control characters
by doing `stty -echoctrl`. However the tty then seems to
send ETX when I hit ^C and gnome-terminal will display
that as [0003], and xterm will output an empty line.

2. Closing an xterm running something through su
will leave the process running in the background.

I noticed this when I closed an xterm running:
  sudo tail -f /var/log/message
But one can also see it with just:
  su -c 'sleep 100' $USER

You can run this in a separate terminal to monitor the sleep:
  watch -n.1 'ps -C sleep -o pid,gid,sid,pgid,ppid,pgrp,tpgid'

Note keeping the same session _and_ same user as with the
following, causes the background process to exit with the xterm:
  su $USER --session-command='sleep 100'

I did try setting 'huponexit' and using `su -l` to no avail.

Note also that a work around which does kill everything when
the xterm is closed is to:

  sudo gnome-terminal -e 'tail -f /var/log/messages'

cheers,
Pádraig.