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Add "statistics.sh", a script that calculates temporal derivatives

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marc René Schädler 2013-11-13 11:59:53 +01:00 committed by Tim Niemeyer
parent a6d1e32948
commit 325690c0cd
1 changed files with 65 additions and 0 deletions
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65
bsp/default/root_file_system/etc/statistics.sh Executable file
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#!/bin/ash
# config
STATSDIR="/tmp/statistics"
# functions
paste_variables() {
local VAR1="$1"
local VAR2="$2"
local TMP1=$(mktemp) || return 1
local TMP2=$(mktemp) || return 1
echo "$VAR1" > "$TMP1"
echo "$VAR2" > "$TMP2"
paste -d" " "$TMP1" "$TMP2"
rm "$TMP1" "$TMP2"
}
get_trafficdata() {
cat /proc/net/dev | tail -n +3 | tr ":" " " | sed -e 's/^[ ]\+//g' | tr -s " " | cut -d" " -f 1,2,3,10,11 || return 1
}
update_traffic() {
local TIME=$(date +%s)
local DATA=$(get_trafficdata)
local DATATMP=
local REFERENCE=
local REFERENCETMP=
local REFERENCE_TIME=
local DELTA=
local DEVICES=
if [ -f "$STATSDIR/traffic_reference_time" ] && [ -f "$STATSDIR/traffic_reference" ]; then
REFERENCE_TIME=$(cat "$STATSDIR/traffic_reference_time")
REFERENCE=$(cat "$STATSDIR/traffic_reference")
fi
if [ -n "$TIME" ] && [ -n "$REFERENCE_TIME" ]; then
DELTA=$(($TIME-$REFERENCE_TIME))
fi
if [ -n "$DATA" ] && [ -n "$REFERENCE" ] && [ -n "$DELTA" ]; then
echo "#device rx[b/s] rx[p/s] tx[b/s] tx[p/s]" > "$STATSDIR/traffic.tmp"
DEVICES=$(echo "$DATA" | cut -d" " -f1 | sort -u) || return 1
echo "$DEVICES" | while read DEVICE; do
if [ -n "$DEVICE" ]
then
DATATMP=$(echo "$DATA" | grep "^$DEVICE " | cut -d" " -f 2- | tr "\n" " ") || return 1
REFERENCETMP=$(echo "$REFERENCE" | grep "^$DEVICE " | cut -d" " -f 2- | tr "\n" " ") || return 1
echo "$DEVICE $DATATMP $REFERENCETMP" | tr -s " " | awk -F" " -v DELTA=$DELTA '{printf "%s %.0f %.0f %.0f %.0f\n",$1,($2-$6)/DELTA,($3-$7)/DELTA,($4-$8)/DELTA,($5-$9)/DELTA}' >> "$STATSDIR/traffic.tmp" || return 1
fi
done
mv "$STATSDIR/traffic.tmp" "$STATSDIR/traffic"
fi
echo "$DATA" > "$STATSDIR/traffic_reference"
echo "$TIME" > "$STATSDIR/traffic_reference_time"
}
# secure dot-scripts
[ -e "$STATSDIR" ] || mkdir -p "$STATSDIR"
[ -d "$STATSDIR" ] || exit 1
chown -R root "$STATSDIR"
chmod -R 700 "$STATSDIR"
# update values
update_traffic