kill parent and child Post: 33608

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Top Forums UNIX for Dummies Questions & Answers kill parent and child Post 33608 by sanjay92 on Saturday 11th of January 2003 11:18:21 PM

01-12-2003

sanjay92

Guest

Re: kill parent and child

Quote:

Originally posted by larry
Hello all,

I have gone through the search and looked at posting about idle users and killing processes. Here is my question I would like to kill an idle user ( which I can do) but how can I asure that all of his process is also killed whit out tracing his inital start PID. I have tried this on a solaris 8 system but, I seem to make the child process a zombie or hang because of what he was doing. Is there a clean way to do this?
Thanks

I have used the following shell script to kill all child PID's for a given PID.

Code:

#!/bin/ksh
# This script will kill all the child process id for a  given pid
#Store the current Process ID
CURPID=$$

# This is process id, parameter passed by user
ppid=$1

if [ -z $ppid ] ; then
   echo No PID given.
   exit;
fi

arraycounter=1
while true
do
        FORLOOP=FALSE
        # Get all the child process id
        for i in `ps -ef| awk '$3 == '$ppid' { print $2 }'`
        do
                if [ $i -ne $CURPID ] ; then
                        procid[$arraycounter]=$i
                        arraycounter=`expr $arraycounter + 1`
                        ppid=$i
                        FORLOOP=TRUE
                fi
        done
        if [ "$FORLOOP" = "FALSE" ] ; then
           arraycounter=`expr $arraycounter - 1`
           ## We want to kill child process id first and then parent id's
           while [ $arraycounter -ne 0 ]
           do
             kill -9 "${procid[$arraycounter]}" >/dev/null
             arraycounter=`expr $arraycounter - 1`
           done
         exit
        fi
done
## Kill Parent ID
kill -9 $CURPID

added code tags for readability --oombera

Last edited by oombera; 02-18-2004 at 08:52 PM..

sanjay92

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LEARN ABOUT BSD

kill

KILL(1) 						      General Commands Manual							   KILL(1)

NAME

       kill - terminate a process with extreme prejudice

SYNOPSIS

       kill [ -sig ] processid ...
       kill -l

DESCRIPTION

       Kill  sends the TERM (terminate, 15) signal to the specified processes.	If a signal name or number preceded by `-' is given as first argu-
       ment, that signal is sent instead of terminate (see sigvec(2)).	 The  signal  names  are  listed  by  `kill  -l',  and	are  as  given	in
       /usr/include/signal.h, stripped of the common SIG prefix.

       The  terminate  signal  will  kill  processes  that do not catch the signal; `kill -9 ...' is a sure kill, as the KILL (9) signal cannot be
       caught.	By convention, if process number 0 is specified, all members in the process group  (i.e.  processes  resulting	from  the  current
       login)  are  signaled  (but  beware:  this works only if you use sh(1); not if you use csh(1).)	Negative process numbers also have special
       meanings; see kill(2) for details.

       The killed processes must belong to the current user unless he is the super-user.

       The process number of an asynchronous process started with `&' is reported by the shell.  Process numbers can also be found by using ps(1).
       Kill  is  a  built-in  to  csh(1); it allows job specifiers of the form ``%...'' as arguments so process id's are not as often used as kill
       arguments.  See csh(1) for details.

SEE ALSO

       csh(1), ps(1), kill(2), sigvec(2)

BUGS

       A replacement for ``kill 0'' for csh(1) users should be provided.

4th Berkeley Distribution					  April 20, 1986							   KILL(1)

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