43 lines
1.1 KiB
Bash
43 lines
1.1 KiB
Bash
#!/bin/sh
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if [ -z $NETWORK_IO_INTERFACE ]; then
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if is_osx; then
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NETWORK_IO_INTERFACE="en0"
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else
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NETWORK_IO_INTERFACE="eth0"
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fi
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fi
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declare -r __network_io_divisor=$[$INTERVAL * 1024]
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__network_io_sample=(0 0)
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__network_io_calc_kBps() {
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echo $1 $2 | awk -v divisor=$__network_io_divisor \
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'{printf "%.2f", ($1 - $2) / divisor}'
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}
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if is_osx; then
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__network_io_collect () {
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netstat -bI $NETWORK_IO_INTERFACE | \
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awk "/$NETWORK_IO_INTERFACE/"'{print $7" "$10; exit}'
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}
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else
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__network_io_collect () {
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cat /proc/net/dev | awk -v iface_regex="$NETWORK_IO_INTERFACE:" \
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'$0 ~ iface_regex {print $2" "$10}'
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}
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fi
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collect () {
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local sample=( $(__network_io_collect) )
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if [ ${__network_io_sample[0]} -ne 0 ]; then
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report "in" $(__network_io_calc_kBps ${sample[0]} ${__network_io_sample[0]})
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report "out" $(__network_io_calc_kBps ${sample[1]} ${__network_io_sample[1]})
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fi
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__network_io_sample=( "${sample[@]}" )
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}
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docs () {
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echo "Network traffic in kB/s."
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echo "\$NETWORK_IO_INTERFACE=$NETWORK_IO_INTERFACE"
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} |