kill process on external script run as a service

Question

I've setup a linux (CentOS) service to run a script that runs in the backgroud (daemon /home/user/testftp.sh &) or in the context of the start and stop service:

# Source function library.
. /etc/init.d/functions

prog=ftpmonitor
lockfile=/var/lock/subsys/ftpmonitor

start() {
        [ "$EUID" != "0" ] && exit 4

        # Start daemons.
        echo -n $"Starting $prog: "
        daemon /home/user/testftp.sh &
        PID1=$!
        #echo "$PID1"
        RETVAL=$?
        echo

        [ $RETVAL -eq 0 ] && touch $lockfile
        return $RETVAL
}

stop() {
        [ "$EUID" != "0" ] && exit 4
        echo -n $"Shutting down $prog: "
        killproc $prog
        kill $PID1
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && rm -f $lockfile
        return $RETVAL
}

My problem is stopping all the processes. killproc $prog will stop the service but the background process is still running (testftp.sh), which needs to be run in the backgroud to monitor ftp logs).

I've seen similar posts that say to use PID1=$! which would represent the PID for testftp.sh. But the PID seems to just be the service ftpmonitor. So obviously my stop service command with kill $PID1 will not work.

EDIT:

testftp.sh script

#!/bin/sh

sudo tail -F /var/log/vsftpd.log | while read line; do
  if sudo echo "$line" | grep -q 'OK UPLOAD:'; then
    username=$(echo "$line" | cut -d" " -f8 | sed 's/\[\(.*\)\]/\1/')
    filename=$(echo "$line" | cut -d, -f2 | sed 's/^[ \t]*//' | tr -d '"')
    home="/home/vsftpd/$username"
    if sudo ls "$home$filename" &> /dev/null; then
      # do something with $filename
        echo "$home$filename is the file to be proccesed"
    fi
  fi
done

Answer 1

You should be able to kill it using one or all of these:

• killall testftp.sh

• kill $(pgrep testftp.sh)

• pkill testftp.sh

If your script is launching other processes and you want to kill it and all its children, use pkill -P:

-P ppid,... 
    Only match processes whose parent process ID is listed.

So, instead of kill $PID1, use

pkill -P $PID1

Alternatively, you could try

kill -- -$(ps opgid= $PID)

This question on SO has some nice pointers.