#!/bin/bash
# Usage:  iostat.sh [-p <period_mins>] [-i <interval_seconds>] [-c <cpulist>] [-h]
TOOLBIN=$(dirname $0)

# Initialize tools environment variables, and define common utility functions
. ${TOOLBIN}/engtools_util.sh
tools_init
if [ $? -ne 0 ]; then
    echo "FATAL, tools_init - could not setup environment"
    exit $?
fi

# Enable use of INTERVAL_SEC sample interval
OPT_USE_INTERVALS=1

IOSTAT=$( which iostat 2>/dev/null )
if [ $? -ne 0 ]; then
    print_separator
    WARNLOG "iostat not available"
    tools_cleanup 0
fi

# MAIN Program:
#-------------------------------------------------------------------------------
# Parse input options
tools_parse_options "${@}"

# Set affinity of current script
CPULIST=""
set_affinity ${CPULIST}

LOG "collecting ${TOOLNAME} for ${PERIOD_MIN} minutes, with ${INTERVAL_SEC} second sample intervals."

# Print tools generic tools header
tools_header

# Calculate number of sample repeats based on overall interval and sampling interval
((REPEATS = PERIOD_MIN * 60 / INTERVAL_SEC))
((REP = REPEATS + 1))

# Execute tool for specified duration
CMD="${IOSTAT} -k -x -t ${INTERVAL_SEC} ${REP}"
#LOG "CMD: ${CMD}"
${CMD}
LOG "done"

# normal program exit
tools_cleanup 0
exit 0