40 lines
1 KiB
Bash
Executable file
40 lines
1 KiB
Bash
Executable file
#!/bin/sh
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# Ce script donne la volumétrie d'une interface réseau à intervalle régulier
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# (se base sur /proc/net/dev)
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FICHIER_PROC=/proc/net/dev
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DELAI="1"
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# Try to get a pretty formatter
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FORMATTER="cat -"
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if which numfmt >/dev/null 2>&1; then
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FORMATTER="numfmt --field 2-3 --to si --padding 7"
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fi
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# Factorize the parsing
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getdata() {
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cat "$1" | sed -e '1d;2d' -e 's/^[[:space:]]*//' -e 's/[[:space:]]\+/ /g' | cut -f 1,2,10 -d " "
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}
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# First grab
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OLDDATA="$( getdata "$FICHIER_PROC" )"
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while sleep "$DELAI" ; do
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NEWDATA="$( getdata "$FICHIER_PROC" )"
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# header
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printf "\n% 15s\t% 6s\t% 6s\n" " " "IN" "OUT"
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echo "$NEWDATA" | while read INTERFACE VOLUME_IN VOLUME_OUT; do
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# Again, scope issues with read and pipes so we make a one-time loop :)
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echo "$OLDDATA" | grep "$INTERFACE" | while read DUMP OLD_VOLUME_IN OLD_VOLUME_OUT; do
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VOLUME_IN="$(( $VOLUME_IN - $OLD_VOLUME_IN ))"
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VOLUME_OUT="$(( $VOLUME_OUT - $OLD_VOLUME_OUT ))"
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printf "% 15s\t%d\t%d\n" "$INTERFACE" "$VOLUME_IN" "$VOLUME_OUT" | $FORMATTER
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done
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done
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OLDDATA="$NEWDATA"
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done
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