Re: clear old output in login screen?
Mike Clarke jmc-freeb...@milibyte.co.uk wrote: On Monday 04 May 2009, per...@pluto.rain.com wrote: ... ? #!/bin/csh ? clear ? vidcontrol -C ? exec /usr/bin/login.real $@ But this wouldn't prevent someone scrolling back with the scroll lock key before logging in. I assume the OP's requirement is to stop people from seeing previous users console activity. That's what the vidcontrol -C line is supposed to accomplish, based on my reading of vidcontrol(1) and earlier messages in the thread. Granted I have not actually tried it. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On Tuesday 05 May 2009, per...@pluto.rain.com wrote:
Mike Clarke jmc-freeb...@milibyte.co.uk wrote:
On Monday 04 May 2009, per...@pluto.rain.com wrote:
...
? #!/bin/csh
? clear
? vidcontrol -C
? exec /usr/bin/login.real $@
But this wouldn't prevent someone scrolling back with the scroll
lock key before logging in. I assume the OP's requirement is to
stop people from seeing previous users console activity.
That's what the vidcontrol -C line is supposed to accomplish,
based on my reading of vidcontrol(1) and earlier messages in the
thread. Granted I have not actually tried it.
Yes, vidcontrol -C will accomplish this, but my point was that
including this as part of the replacement login script is too late. You
don't need to be logged in to use the scroll lock and pg{Up,Dn} keys.
To prevent people seeing the previous users activity you would need to
clear the console buffer at the logout stage.
--
Mike Clarke
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Re: clear old output in login screen?
On Tue, May 05, 2009 at 09:45:16AM +0100, Mike Clarke wrote:
On Tuesday 05 May 2009, per...@pluto.rain.com wrote:
Mike Clarke jmc-freeb...@milibyte.co.uk wrote:
On Monday 04 May 2009, per...@pluto.rain.com wrote:
...
? #!/bin/csh
? clear
? vidcontrol -C
? exec /usr/bin/login.real $@
But this wouldn't prevent someone scrolling back with the scroll
lock key before logging in. I assume the OP's requirement is to
stop people from seeing previous users console activity.
That's what the vidcontrol -C line is supposed to accomplish,
based on my reading of vidcontrol(1) and earlier messages in the
thread. Granted I have not actually tried it.
Yes, vidcontrol -C will accomplish this, but my point was that
including this as part of the replacement login script is too late. You
don't need to be logged in to use the scroll lock and pg{Up,Dn} keys.
To prevent people seeing the previous users activity you would need to
clear the console buffer at the logout stage.
I see what you mean.
Perhaps put vidcontrol -C in /etc/csh.logout
For other shells e.g ksh:
alias logout='~/.ksh_logout; exit'
(not tested)
It seems that for sh, logout is a builtin but it's not mentioned in
it's manpage.
Regards,
--
Frank
Contact info: http://www.shute.org.uk/misc/contact.html
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Re: clear old output in login screen?
On Monday 04 May 2009, per...@pluto.rain.com wrote: If I needed to do this, could not find a way to do it via configuration settings, and didn't want to hack the login source code, I would try renaming the login binary to something like login.real, and replacing it with an executable script containing something like: #!/bin/csh clear vidcontrol -C exec /usr/bin/login.real $@ But this wouldn't prevent someone scrolling back with the scroll lock key before logging in. I assume the OP's requirement is to stop people from seeing previous users console activity. -- Mike Clarke ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
clear old output in login screen?
Currently, if I log in, do some work, then log out (from plain TTY, no X/SSH/etc), the output of my previous session is still readable above the new login: prompt. One can use scroll lock to view even more. How do I get it to clear the screen (and the scroll buffer) when the login prompt gets redisplayed? -John ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
Hey John, In order to achieve this, there are two methods that I know of, however, they are only tested in the Bourne and Bourne Again shells. clear logout # Bourne Again (Bash) Shell clear exit # Bourne (sh) Shell You may have to try similar commands (specific for that shell) for shells that are not Bourne-derived, but one of these two commands should almost always work. Sincerely, Gabriel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On May 3, 2009, at 9:48 PM, gabe g wrote: Hey John, In order to achieve this, there are two methods that I know of, however, they are only tested in the Bourne and Bourne Again shells. clear logout # Bourne Again (Bash) Shell clear exit # Bourne (sh) Shell You may have to try similar commands (specific for that shell) for shells that are not Bourne-derived, but one of these two commands should almost always work. Hello, zsh has .zlogout which gets read/executed when the shell exits. I have the following setup: ~ % cat ~/.zlogout clear Perhaps other shells have a similar feature. Regards, - Emiel ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On 3 mei 2009, at 21:48, gabe g wrote: Hey John, In order to achieve this, there are two methods that I know of, however, they are only tested in the Bourne and Bourne Again shells. clear logout # Bourne Again (Bash) Shell clear exit # Bourne (sh) Shell You may have to try similar commands (specific for that shell) for shells that are not Bourne-derived, but one of these two commands should almost always work. clear /etc/issue Peter -- http://www.boosten.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On Sun, May 03, 2009 at 11:46:30AM -0700, jw wrote: Currently, if I log in, do some work, then log out (from plain TTY, no X/SSH/etc), the output of my previous session is still readable above the new login: prompt. One can use scroll lock to view even more. How do I get it to clear the screen (and the scroll buffer) when the login prompt gets redisplayed? If you're using tcsh, you can put the following into ~/.logout: clear -- Jonathan Chen j...@chen.org.nz We laugh in the face of danger, we drop icecubes down the vest of fear - Edmond Blackadder III ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On 5/3/09, jw jwde...@gmail.com wrote: Currently, if I log in, do some work, then log out (from plain TTY, no X/SSH/etc), the output of my previous session is still readable above the new login: prompt. One can use scroll lock to view even more. How do I get it to clear the screen (and the scroll buffer) when the login prompt gets redisplayed? My /etc/csh.logout and /etc/csh.login contains: echo $TERM | grep cons25 /dev/null clear vidcontrol -C For other shells it's similar. -- Paul ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On Sun, May 3, 2009 at 12:48 PM, gabe g johndoeismyn...@gmail.com wrote: Hey John, In order to achieve this, there are two methods that I know of, however, they are only tested in the Bourne and Bourne Again shells. clear logout # Bourne Again (Bash) Shell clear exit # Bourne (sh) Shell I tried this, but I can still scroll back with the scroll lock key. 'clear' seems to just put the prompt at the top of the screen, not get rid of scroll history... -John ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On Sun, May 3, 2009 at 1:51 PM, Paul B. Mahol one...@gmail.com wrote: echo $TERM | grep cons25 /dev/null clear vidcontrol -C Aha! I didn't know about 'vidcontrol -C' That combined with 'clear' does the trick. However... Is there any way I could have this execute when the login: prompt displays, rather than having each user need to do it themselves? In other words, I want this clearing to happen for all users regardless of shell, etc. I haven't seen anything in login(1) or login.conf(5) that allows this kind of customization, but maybe I missed it... -John ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
On Sun, 3 May 2009 11:46:30 -0700, jw jwde...@gmail.com wrote: How do I get it to clear the screen (and the scroll buffer) when the login prompt gets redisplayed? Two options: a) Clear everything right after login. Put the command clear in your ~/.login, or /etc/csh.login for all users. b) Clear everything right after logout, so the new login will get a blank screen. Put the command clear in your ~/.logout, or /etc/csh.logout for all users. This assumes that you have the standard dialog shell csh. If you're using bash, you need to modify its respective files, ~/.profile or ~/.bashrc - I don't know, I'm using csh. :-) -- Polytropon From Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
jw jwde...@gmail.com wrote: On Sun, May 3, 2009 at 1:51 PM, Paul B. Mahol one...@gmail.com wrote: echo $TERM | grep cons25 /dev/null clear vidcontrol -C Aha! I didn't know about 'vidcontrol -C' That combined with 'clear' does the trick. However... Is there any way I could have this execute when the login: prompt displays, rather than having each user need to do it themselves? In other words, I want this clearing to happen for all users regardless of shell, etc. If I needed to do this, could not find a way to do it via configuration settings, and didn't want to hack the login source code, I would try renaming the login binary to something like login.real, and replacing it with an executable script containing something like: #!/bin/csh clear vidcontrol -C exec /usr/bin/login.real $@ Granted such a hack will need to be redone any time you do an installworld. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: clear old output in login screen?
0 jw jwde...@gmail.com wrote: On Sun, May 3, 2009 at 1:51 PM, Paul B. Mahol one...@gmail.com wrote: echo $TERM | grep cons25 /dev/null clear vidcontrol -C Aha! I didn't know about 'vidcontrol -C' That combined with 'clear' does the trick. However... Is there any way I could have this execute when the login: prompt displays, rather than having each user need to do it themselves? In other words, I want this clearing to happen for all users regardless of shell, etc. If I needed to do this, could not find a way to do it via configuration settings, and didn't want to hack the login source code, I would try renaming the login binary to something like login.real, and replacing it with an executable script containing something like: #!/bin/csh clear vidcontrol -C exec /usr/bin/login.real $@ Granted such a hack will need to be redone any time you do an installworld. The solution I've deployed in my environment is to have /etc/issue contain a single ^L character. Prior to doing that, /etc/issue contained 25+ blank lines, which effectively cleared the terminal before displaying the login prompt. Regards, -- Matt Emmerton ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
