Posta era OSX Screenshots

#!/bin/sh

enstatus() {
    ifconfig $@ | grep "status" | awk '{print $NF}';
}

getbytes() {
    netstat -ib | awk "/$@/"'{print $7" "$10; exit}';
}

getstat() {
    waittime=3;
    sample1=(`getbytes $@`);
    sleep $waittime;
    sample2=(`getbytes $@`);
    results=(`echo "scale=2; ((${sample2[0]}+${sample2[1]})-(${sample1[0]}+${sample1[1]}))/(1024*$waittime)"| bc`);
    printf "%.2f KB/s\n" ${results[0]};
}

if [ `enstatus en0` == 'active' ]; then
    echo "`getstat en0`";
elif [ `enstatus en1` == 'active' ]; then
    echo "`getstat en1`";
else    
    echo "Offline";
fi