99 lines
2.5 KiB
Text
99 lines
2.5 KiB
Text
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#!/bin/bash
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# Source: http://www.onlamp.com/pub/a/linux/2000/11/16/LinuxAdmin.html
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INSTANCE="${BLOCK_INSTANCE}"
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# If you don't like you can use any other IP
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INTERFACE="$(ip route get 8.8.8.8 | grep -Po '(?<=(dev )).*(?= src)')"
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if [[ "${INSTANCE}" = "" ]]; then
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INSTANCE="${INTERFACE};both"
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fi
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DISPLAY=$(echo "${INSTANCE}" | awk -F ';' '{print $2}')
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INSTANCE=$(echo "${INSTANCE}" | awk -F ';' '{print $1}')
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if [[ "${DISPLAY}" = "" ]]; then
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DISPLAY="both"
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fi
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ONE_KB=1024
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ONE_MB=$(echo "${ONE_KB}*1024" | bc -l)
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TEN_MB=$(echo "${ONE_MB}*10" | bc -l)
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OHD_MB=$(echo "${TEN_MB}*10" | bc -l)
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URGENT_VALUE="${ONE_MB}"
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PREV_IN=0
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PREV_OUT=0
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PREV_FILE="/tmp/.bandwidth"
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if [[ -f "${PREV_FILE}" ]]; then
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PREV_CONT=$(cat "${PREV_FILE}")
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PREV_IN=$(echo "${PREV_CONT}" | head -n 1)
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PREV_OUT=$(echo "${PREV_CONT}" | tail -n 1)
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fi
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BANDWIDTH=$(grep "${INSTANCE}" /proc/net/dev | awk -F: '{print $2}' | awk '{print $1" "$9}')
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if [[ "${BANDWIDTH}" = "" ]]; then
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exit
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fi
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BYTES_IN=$(echo "${BANDWIDTH}" | awk -F ' ' '{print $1}')
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BYTES_OUT=$(echo "${BANDWIDTH}" | awk -F ' ' '{print $2}')
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function FormatNumber() {
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if [[ "${1}" -ge "${OHD_MB}" ]]; then
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echo $(echo "scale=0;${1}/${ONE_MB}" | bc -l)"mb"
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elif [[ "${1}" -ge "${TEN_MB}" ]]; then
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echo $(echo "scale=1;${1}/${ONE_MB}" | bc -l)"mb"
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elif [[ "${1}" -ge "${ONE_MB}" ]]; then
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echo $(echo "scale=2;${1}/${ONE_MB}" | bc -l)"mb"
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elif [[ "${1}" -ge "${ONE_KB}" ]]; then
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echo $(echo "scale=0;${1}/${ONE_KB}" | bc -l)"kb"
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else
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echo "${1}""b"
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fi
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}
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if [[ "${PREV_IN}" != "" ]] && [[ "${PREV_OUT}" != "" ]]; then
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# Calculate the CPU usage since we last checked.
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DIFF_IN=$(echo "scale=0;${BYTES_IN} - ${PREV_IN}" | bc -l)
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DIFF_OUT=$(echo "scale=0;${BYTES_OUT} - ${PREV_OUT}" | bc -l)
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DIFF_TOTAL=0
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USAGE_IN=$(FormatNumber "${DIFF_IN}")
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USAGE_OUT=$(FormatNumber "${DIFF_OUT}")
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if [[ "${DISPLAY}" = "both" ]]; then
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echo "${USAGE_IN} : ${USAGE_OUT}"
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echo "${USAGE_IN} : ${USAGE_OUT}"
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echo ""
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DIFF_TOTAL=$((DIFF_TOTAL+DIFF_IN))
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DIFF_TOTAL=$((DIFF_TOTAL+DIFF_OUT))
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elif [[ "${DISPLAY}" = "in" ]]; then
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echo "${USAGE_IN}"
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echo "${USAGE_IN}"
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echo ""
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DIFF_TOTAL=$((DIFF_TOTAL+DIFF_IN))
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elif [[ "${DISPLAY}" = "out" ]]; then
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echo "${USAGE_OUT}"
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echo "${USAGE_OUT}"
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echo ""
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DIFF_TOTAL=$((DIFF_TOTAL+DIFF_OUT))
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fi
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else
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echo "?"
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echo "?"
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echo ""
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fi
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# Remember the total and idle CPU times for the next check.
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echo "${BYTES_IN}" > "${PREV_FILE}"
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echo "${BYTES_OUT}" >> "${PREV_FILE}"
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if [[ "${DIFF_TOTAL}" -ge "${URGENT_VALUE}" ]]; then
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exit 33
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fi
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