simple script to save battery log with kernel debug and export to datasheet

logbat.sh

#!/bin/bash

sdlog="/sdcard/logbat.txt"
log="logbat.txt"
result="battery.csv"

function print_usage {
    echo "Usage:"
    echo "$0 [start | stop | pull]"
    
    echo "start:
Start a background process to save /proc/kmsg to /sdcard/logcat.txt
"
    echo "stop:
Kill the background process which logs /proc/kmsg
"
    echo "pull:
Pull logbat.txt and generate exel file"
}

function backup {
    # create backup file
    if [ -f "$1" ]
    then
	back=$(date +".$1_%m_%d_%Hh%Mm%S.back")
	mv "$1" "$back"
	echo "Created backup $back"
    fi
}

function start {
    echo "Launching"
    back=$(date +".sdlogbat_%m_%d_%Hh%Mm%S.back")
    adb pull "$sdlog" "$back"
    echo "Created backup $back"
    adb shell "busybox nohup cat /proc/kmsg > $sdlog" &
    sleep 1
    echo "Done, pid:"
    adb shell "ps | grep \" cat$\""
}

function stop {
    # getting pid
    adb shell "ps | grep \" cat$\"" > tmp
    pid=`cat tmp | tr -s " " | cut -d" " -f2`
    rm tmp
    echo "Stopping $pid"
    adb shell "kill \"$pid\""
    echo "Done."
}

function pull {
    backup $log
    backup $result
    adb pull "$sdlog" "$log"
    # excel first part
    echo "TIME STATUS IBAT VSYS VBAT DSOC RSOC" > "$result"
    cat "$log" |
	grep "IBAT" |
	tr "[A-Z][a-z]_:\t%=" " " |
	tr -s " " |
	cut -d" " -f2,4-9 >> "$result"
    # excel second part
    echo >> "$result"
    echo "TIME PERCENT" >> "$result"
    cat logbat.txt |
	grep "battery capacity is" |
	tr "[A-Z][a-z]:_%\t" " " |
	tr -s " " |
	cut -d" " -f2,3 >> "$result"
    echo "Created $result"
}

case "$1" in
    start)
	stop
        start
	;;
    stop)
        stop
	;;
    pull)
	pull
	;;
    usage)
	print_usage
	;;
    *)
	print_usage
	;;
esac