Clearing the console each time a user logs out

Discussion:

Olivier Regnier

2009-07-09 18:59:53 UTC

Hello,

I installed OpenBSD 4.5 on my Samsung NC10. I want to clear the console each
time a user logs out. I modified /etc/gettytab file but i have no result. Can
you give me some information on this topic ?

Thank you in advance.

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Jan-Erik Skata

2009-07-09 20:54:26 UTC

Permalink

Post by Olivier Regnier
Hello,
I installed OpenBSD 4.5 on my Samsung NC10. I want to clear the console each
time a user logs out. I modified /etc/gettytab file but i have no result. Can
you give me some information on this topic ?
Thank you in advance.
_________________________________________________________________
Inidit ! Des Emotictnes Dijanties! Installez les dans votre Messenger !
http://www.ilovemessenger.fr/Emoticones/EmoticonesDejantees.aspx

Depeding on your shell, you could do this from a .logout file (and from
/etc/skel to be added to all new users). This .bash_logout is used by
KUbuntu:

# ~/.bash_logout: executed by bash(1) when login shell exits.

# when leaving the console clear the screen to increase privacy

if [ "$SHLVL" = 1 ]; then
[ -x /usr/bin/clear_console ] && /usr/bin/clear_console -q
fi

Stuart Henderson

2009-07-09 23:05:05 UTC

Permalink

you need to modify std.9600 or default in gettytab, unless you change the
terminal type in ttys.

I'm not sure if there's a good way to clear the scrollback buffer though.

Jason McIntyre

2009-07-10 06:40:37 UTC

Permalink

Post by Stuart Henderson

you need to modify std.9600 or default in gettytab, unless you change the
terminal type in ttys.
I'm not sure if there's a good way to clear the scrollback buffer though.

if you just want a clear screen for the next login, you can have
your shell catch the EXIT signal and clear the screen. for example,
in a ksh .profile, have:

trap clear EXIT

or instead of running clear, it could source a file of commands, or
whatever. the "trap" built-in is described in more detail in ksh(1). i
don;t know if csh has an equivalent.

that doesn;t clear the scrollback buffer exactly, but it will clear most
of it.

jmc

Olivier Regnier

2009-07-10 18:48:12 UTC

Permalink

I have already modified the file "gettytab" with these lines:

P:Pc:Pc console:\
:np:sp#9600:\
:cl=\E[H\E[2J:

This does not work ? An idea ?

Subject: Re: Clearing the console each time a user logs out
Date: Thu, 9 Jul 2009 23:05:05 +0000

you need to modify std.9600 or default in gettytab, unless you change the
terminal type in ttys.
I'm not sure if there's a good way to clear the scrollback buffer though.

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Stuart Henderson

2009-07-10 20:01:39 UTC

Permalink

Post by Olivier Regnier
P:Pc:Pc console:\
:np:sp#9600:\
This does not work ? An idea ?

Please read my mail again, you missed something in it.

Post by Olivier Regnier

Subject: Re: Clearing the console each time a user logs out
Date: Thu, 9 Jul 2009 23:05:05 +0000

you need to modify std.9600 or default in gettytab, unless you change the
terminal type in ttys.
I'm not sure if there's a good way to clear the scrollback buffer though.

_________________________________________________________________
Vous voulez savoir ce que vous pouvez faire avec le nouveau Windows Live ? Lancez-vous !
http://www.microsoft.com/windows/windowslive/default.aspx

Olivier Regnier

2009-07-10 20:54:46 UTC

Permalink

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Mark Zimmerman

2009-07-10 19:33:04 UTC

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Post by Olivier Regnier
P:Pc:Pc console:\
:np:sp#9600:\
This does not work ? An idea ?

The FAQ entry for this has been wrong for a few releases now. Try
this:

2|std.9600|9600-baud:\
:sp#9600:\
:cl=\E[H\E[2J:

Assuming /etc/ttys has this for the console:

console "/usr/libexec/getty std.9600" vt220 off secure