Thanks to everybody for elucidating this script. I really appreciate folks
taking the time!
John
On 1/19/07, Clay Berlo <[EMAIL PROTECTED]> wrote:
Good analysis! Your rundown of what the script does is fairly accurate.
The $3 bit was a little confusing for me, too, until I played around with
a similar script. Basically, the getent lists the users in a
user:passwordtoekn:uid kind of format, so when passed to awk with the -F:
(setting : as a field delimiter), the 3rd field is the UID. After you have
the UIDs you're working with, it cycles through to see who's logged in with
a current session (thus the gnome-panel stuff) and kills any bonobo process
not attached to an active session. (I was having a problem with bonobo
processes not being killed off.)
slay might work, but I imagine you'd have to follow a similar logic to
make sure you're not killing off any root processes or active users.
On Thu, 2007-18-01 at 15:14 -0800, john wrote:
Thanks Clay. I appreciate the script. I am going to try this out. But
before I do, I hope you can help me to understand what is going on a little
better? Anyone who feels like chiming in would be quite welcome.
1) basically I think this script is looping through the password db by
calling the program 'getent' and piping the results to awk.
2) Awk is applying a separator : and then something magical happens (what
is $3?) Somehow uids are getting assigned to this variable?
3 Then somehow (related to $3) we look for uids above 999 and pass them to
$1 which will print them to standard output (i.e the tty from which this
script is executed, if executed by hand). Is there more going on here?
4) then the script echos the result of the variable $user and runs 'pgrep
-u' against the expanded variable $user for any gnome-panel and bobono
processes owned by that user
5) the program loops until done.
Sorry, I just like to understand what I am doing before I do it. Will
killing zombie type gnome-panel and bonobo stuff, clean up leftover
processes like firefox, games etc?
TIA!
John
On 1/18/07, *Clay Berlo* <[EMAIL PROTECTED]> wrote:
Funny, I just ran into the same kind of problem myself not so long ago.
Talked to they guys on IRC and was given the following:
for user in $(getent passwd | awk -F: '$3 > 999 {print $1}'); do echo
$user; pgrep -u ${user} gnome-panel || pkill -u ${user} bonobo; done
Now, my system is running the "usual" gnome stuff, so this works for
killing off processes from anyone not logged in. If you're using KDE or
XFCE, you'll have to scan for something other thant gnome-panel.
Oliver Grawert has suggested this should go into the ldm script somehow.
As I'm not familiar with how to play around with that file, I just stuck in
a cron job to run hourly.
On Wed, 2007-17-01 at 14:30 -0800, john wrote:
Hello all,
I'm running ltsp 4.2 on Ubuntu LTS 6.06 using win2k3 AD for auth. I find
that at the end of the day I have a lot of leftover student user processes
running, and I'd like to have a little script that kills them all after
school. Does anyone have something ready-made or do I need to brew one
myself?
TIA!
John
--
Clay Berlo <[EMAIL PROTECTED]>
DSBN Technical Services
--
Clay Berlo <[EMAIL PROTECTED]>
DSBN Technical Services
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