#!/usr/bin/awk -f
BEGIN {
  fmt="%8s %10.2f bps\n"
  getline <"/proc/uptime"; uptime=$1
  while (getline <"/proc/net/dev") {
    if (NF > 16) {
      printf "in =" fmt, $1, $2 / uptime
      printf "out=" fmt, $1, $10 / uptime
    }
  }
}