traf.sh

   1 #!/bin/sh
   2 ##
   3 ## Shows TX/RX over 1sec
   4 ## By Michal Nazareicz (mina86/AT/mina86.com)
   5 ##  & Stanislaw Klekot (dozzie/AT/irc.pl)
   6 ## Released to Public Domain
   7 ##
   8 ## This is part of Tiny Applications Collection
   9 ##   -> http://tinyapps.sourceforge.net/
  10 ##
  11
  12 # usage: ./traf.sh <interface>
  13 # <interface> can be a BRE
  14
  15
  16 set -e
  17 INT="${1-eth0}"
  18
  19 # shellcheck disable=SC2120
  20 get_traffic () {
  21         TX2=0; RX2=0;
  22         while read LINE; do
  23                 expr X"${LINE%%:*}" : X".*\\($INT\\)" >/dev/null || continue
  24                 # shellcheck disable=SC2086
  25                 set -- ${LINE#*:}
  26                 RX2=$(( RX2 + $1 ))
  27                 TX2=$(( RX2 + $9 ))
  28         done </proc/net/dev
  29 }
  30
  31 # shellcheck disable=SC2119
  32 get_traffic
  33
  34 while sleep 1; do
  35         TX1=$TX2
  36         RX1=$RX2
  37         # shellcheck disable=SC2119
  38         get_traffic
  39
  40         TX=$(( TX2 - TX1 ))
  41         RX=$(( RX2 - RX1 ))
  42
  43         PT=
  44         PR=
  45         I=0
  46         while [ "$I" -lt 15360 ]; do
  47                 if [ "$I" -lt "$TX" ]; then PT="#$PT"; else PT=" $PT"; fi
  48                 if [ "$I" -lt "$RX" ]; then PR="$PR#"; else PR="$PR "; fi
  49                 I=$(( I + 512 ))
  50         done
  51         if [ "$TX" -gt 2048 ]; then TX="$(( TX / 1024 )) K"; fi
  52         if [ "$RX" -gt 2048 ]; then RX="$(( RX / 1024 )) K"; fi
  53 #       printf "%s < %6s | %6s > %s\n" "$PT" "$TX" "$RX" "$PR"
  54         printf "%6s  %s | %s  %6s\n" "$TX" "$PT" "$PR" "$RX"
  55
  56 #       PROGRESS=""
  57 #       I=0
  58 #       while [ $I -lt $TX -o $I -lt $RX ]; do
  59 #               if [ $I -gt $TX ]; then
  60 #                       PROGRESS="$PROGRESS'"
  61 #               elif [ $I -gt $RX ]; then
  62 #                       PROGRESS="$PROGRESS."
  63 #               else
  64 #                       PROGRESS="$PROGRESS:"
  65 #               fi
  66 #               I=$(( $I + 512 ))
  67 #       done
  68 #       if [ $TX -gt 2048 ]; then TX="$(( $TX / 1024 )) K"; fi
  69 #       if [ $RX -gt 2048 ]; then RX="$(( $RX / 1024 )) K"; fi
  70 #       printf "< %6s > %6s  %s\n" "$TX" "$RX" "$PROGRESS"
  71 done