#!/bin/ksh
################################################################################
#
# File to loop while a pattern exists, does SOMETHING when it is missing.
#
# Written by Matt Baker mbaker@computeranddata.com
#
################################################################################
LOGFILE=/tmp/watchdog.log.$$
SLEEPTIME=5
#
# pattern is case sensitive (this could be changed in the grep with a '-i')
#
PATTERN=hello
 
echo "$0 started on: $(date)" > $LOGFILE
 
#
# while PATTERN exists, loop on some commands
#
while (( $(ps -eo comm,args |grep -c $PATTERN | grep -v "grep grep") ))
do
        echo "----------------------------------------------------------------"

        #
        # commands to do while it is still running (if any)
        #
        date
        ps -elf
        finger -i;who -lu
 
        sleep $SLEEPTIME
 
done >> $LOGFILE
 
#
# process PATTERN is no longer there, do finish commands and exit
#
# could add paging and/or email process here
#
echo "----------------------------------------------------------------" >> $LOGFILE

date >> $LOGFILE
last >> $LOGFILE

echo "$0 stopped on: $(date)" >> $LOGFILE
echo "Watchdog barked!  Closed logfile: $LOGFILE"