#!/usr/bin/ksh
#
# Usage:
USEAGE="vmlog [-i interval] [-c count] [-l logfile]"
#
# Logfile	- If not specified, this defaults to /var/adm/vmstat/vmlog
#		with the day of the month appended.  This means that the
#		data will be kept for 31 days, and will be overwritten each
#		month much like SAR data is.
# Interval 	- If not specified, this defaults to 300 seconds
# Count		- If not specified, this defaults to 1 day worth of 
#                 observations
#
# Version 1.0
#
if [ $# -eq 1 ]; then
	echo $USAGE
	exit 1
fi

while [ $# -ge 2 ]; do
case $1 in 
	-c)	COUNT=$2
		shift 2
		;;
	-i)	INTERVAL=$2
		shift 2
		;;
	-l)	LOG=$2
		shift 2
		;;
	*)	echo $USAGE
		exit 1
		;;
esac
done

if [ -z "$INTERVAL" ]; then
	INTERVAL=300
fi
if [ -z "$COUNT" ]; then
	# Number of seconds in a day = 60x60*24=86400
	COUNT=`expr 86400 / $INTERVAL`
fi
if [ -z "$LOG" ]; then 
	LOG=`date +"/var/adm/vmstat/vmlog.%d"`
else 
	LOG=`date +"$LOG.%d"`
fi

#
# Create the log dir if needed.
DIR=`dirname $LOG`
if [ ! -d $DIR ]; then
	mkdir $DIR
fi

 vmstat -t $INTERVAL $COUNT > $LOG