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| 1 | #!/bin/bash | |
| 2 | ## | |
| 3 | ##This script return the bandwidth in Rx and Tx by substract old Rx/Tx values by the new ones. | |
| 4 | ##Ex: If the script is called every 10s, it will compare the rx_bytes 10s ago (old_rx) with the new one (rx) and substract these two values to get a value as Bytes/10S | |
| 5 | ## | |
| 6 | ## Author : TDUVAL | |
| 7 | ||
| 8 | # Location of the networkTraffic files | |
| 9 | LOCATION="/usr/share/rpimonitor/web/custom/net_traffic/" | |
| 10 | ||
| 11 | # Test if directory $path exist then create it | |
| 12 | if [ ! -d $LOCATION ] | |
| 13 | then mkdir $LOCATION | |
| 14 | fi | |
| 15 | ||
| 16 | # Test if file rx exist then create it | |
| 17 | if [ ! -f $LOCATION/rx ] | |
| 18 | then touch $LOCATION/rx | |
| 19 | fi | |
| 20 | ||
| 21 | # Test if file tx exist then create it | |
| 22 | if [ ! -f $LOCATION/tx ] | |
| 23 | then touch $LOCATION/tx | |
| 24 | fi | |
| 25 | ||
| 26 | # Get old values in rx/tx files | |
| 27 | OLDRX=`cat $LOCATION/rx` | |
| 28 | OLDTX=`cat $LOCATION/tx` | |
| 29 | ||
| 30 | # Get new values | |
| 31 | RX=`cat /sys/class/net/eth0/statistics/rx_bytes` | |
| 32 | TX=`cat /sys/class/net/eth0/statistics/tx_bytes` | |
| 33 | ||
| 34 | # Store new values in rx/tx files | |
| 35 | echo $RX > $LOCATION/rx | |
| 36 | echo $TX > $LOCATION/tx | |
| 37 | ||
| 38 | # Substract new - old to get traffic in Bytes/period | |
| 39 | RX_TRAFFIC=$(($RX-$OLDRX)) | |
| 40 | TX_TRAFFIC=$(($TX-$OLDTX)) | |
| 41 | ||
| 42 | # Display traffic value in stdout | |
| 43 | echo -e "rx=$RX_TRAFFIC\ntx=$TX_TRAFFIC" |
