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Full Discussion: Cannot kill hacker process with my script
Top Forums Shell Programming and Scripting Cannot kill hacker process with my script Post 302442578 by agama on Wednesday 4th of August 2010 09:49:37 PM
Old 08-04-2010
You're going to have the same problem with the other cut command:

Code:
hackertty=$(ps -fu $(logname)| grep xterm | cut -d ' ' -f10)

For the times that it fails, there are probably enough extra blanks in the line that picking up 'field 10' isn't getting the tty, but some other string. Then when you compare these to your tty name they will never match and you'll kill your session. Use the same technique with awk to pick up the correct tty field from the ps output.

If you want to be doubly sure that you don't kill your xterm, you could pass the process id to the script (it's possible to have the script dig this info out, but easier to pass it in). If your script is called kill_hacker, the command line might look something like:

Code:
kill_hacker $PPID

and the code in the script could be changed to test that the process id you're about to kill isn't the one passed in:

Code:
dont_kill=$1           # get xterm pid that we want not to kill
if [[ -z $dont_kill ]]
then
      echo "abort: missing process-id on command line"
      exit 1
fi
:
:
while (( $j < ${#hackerttycurrent[*]} ))
do   
        if [[ ${hackercurrent[$j]} != $dont_kill ]]
        then
                kill -9 ${hackercurrent[$j]}
                echo " killed: pid=${hackercurrent[$j]} tty=${hackerttycurrent[$j]}"
        else
                echo "skipped: pid=${hackercurrent[$j]} tty=${hackerttycurrent[$j]}"
        fi

        j=$(( j+1 ))
done

With this you could also elminate the need to get the tty information from the ps output.
 

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LEARN ABOUT DEBIAN

installsieve

INSTALLSIEVE(1) 					      General Commands Manual						   INSTALLSIEVE(1)

 *

NAME

       installsieve - user utility for managing sieve scripts

SYNOPSIS

       installsieve

DESCRIPTION

       installsieve is a utility that allows users to manage their sieve scripts kept on the server.

OPTIONS

       -v <name> View script with the given name. The script if retrieved sucessfully is output to standard output.

       -l  List  all  of  the scripts currently on the server. If one of the scripts is active a arrow is printed indicating that it is the active
       script.

       -p <port> Port to connect to. If left off this defaults to "sieve" as defined in /etc/services.

       -i <file> Install a file onto the server. If a script with the same name already exists on the server it is overwritten.  Upon  sucessfully
       putting	the  script on the server the script is set active. If <file> has the extension .script it is chopped when put on the server since
       sieve names may not contain a '.'.

       -a <name> Set <name> as the active script. The list of available names can be obtained from the '-l' option..

       -d <name> Delete the sieve script on the server with <name>.

       -m <mechanism> Force installsieve to use <mechanism> for authentication. If not specified the strongest authentication mechanism is chosen.

       -g <name> Get the sieve script with <name> and save it to disk with a ".script" extension. If a file with that name already  exists  it	is
       overwritten.

       -u <user> Userid/Authname to use for authentication; by default, the current user.

CMU
								   Project Cyrus						   INSTALLSIEVE(1)
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