04-02-2004
kill all user processes
Hi there, i've been searching all over and i thought i had understood the way i should go to kill all the processes related to a user. But i'm getting more confused then i was.
By lunch time i have to make a database backup, and for that all the users shoul logout. The problem is that many users don't have the trouble logging out , so before i start the backup i have to kill them all. I've tryed some scripts , and tryed to adapt them to my needs, but all that i found would kill by process name , or using the pid.
I need some script that would ask me for the user to kill , and given the username it would kill all the processes running by tht user.
How can i do this?
i was trying to use this
printf "\n\nUsername to kill?"
read nUsername
[ "$nUsername" ] || exit
ps -u $nUsername | awk -v nUid="nUid" '
{
if ( $1 == nUid )
kill -9 $2
}'
sorry, no great knowleage about scripting
thanks
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KILL(2) System Calls Manual KILL(2)
NAME
kill - send signal to a process
SYNOPSIS
kill(pid, sig);
DESCRIPTION
Kill sends the signal sig to the process specified by the process number in r0. See signal(2) for a list of signals.
The sending and receiving processes must have the same effective user ID, otherwise this call is restricted to the super-user.
If the process number is 0, the signal is sent to all other processes in the sender's process group; see tty(4).
If the process number is -1, and the user is the super-user, the signal is broadcast universally except to processes 0 and 1, the scheduler
and initialization processes, see init(8).
Processes may send signals to themselves.
SEE ALSO
signal(2), kill(1)
DIAGNOSTICS
Zero is returned if the process is killed; -1 is returned if the process does not have the same effective user ID and the user is not
super-user, or if the process does not exist.
ASSEMBLER
(kill = 37.)
(process number in r0)
sys kill; sig
KILL(2)