#!/bin/bash
# Usage:  netstats.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

# Print key networking device statistics
function print_netcmds()
{
  # Configuration for netcmds
  DEV=/proc/net/dev
  NETSTAT=/proc/net/netstat

  print_separator
  TOOL_HIRES_TIME

  for net in \
    ${DEV} ${NETSTAT}
  do
    if [ -e "${net}" ]
    then
      ${ECHO} "# ${net}"
      ${CAT} ${net}
      ${ECHO}
    fi
  done
}

#-------------------------------------------------------------------------------
# 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))

for ((rep=1; rep <= REPEATS ; rep++))
do
  print_netcmds
  sleep ${INTERVAL_SEC}
done
print_netcmds
LOG "done"

# normal program exit
tools_cleanup 0
exit 0