#!/bin/bash
PIDkill=0			# # of processes successfully killed.
PlogFile="/path/to/pidkill.txt	# File to receive log entries.
PpidFile="/path/to/pid.txt"	# File containing list of PIDs to kill.

# Verify that $PpidFile exists and is readable...
if [ ! -r "$PpidFile" ]
then	printf 'Cannot read file "%s"\n' "$PpidFile"
	exit 1
fi

# Process the PIDs in $PpidFile.
while read RelatedEachPid
do	# Check for the header line...
	if [ "$RelatedEachPid" = 'Ppid' ]
	then	# Header found, skip to next line from $PpidFile.
		continue
	fi

	# Kill the process.
	echo "kill -9 $RelatedEachPid"
	if kill -9 $RelatedEachPid
	then	# kill succeeded: note status and increment counter.
		echo "kill -9 $RelatedEachPid Success"
		PIDkill=$((PIDkill + 1))
	# Following two lines are commented out because the kill command will
	# print a diagnostic message if it fails; why produce two outputs?
	# else	# kill failed: note status.
	#	echo "kill -9 $RelatedEachPid Fail"
	fi
done < "$PpidFile"

# Log the results from this run.
echo "total of pids killed: $PIDkill - $(date)" >> "$PlogFile"