#!/bin/sh
# Display foreign IP addresses coming from port 8333 --or-- connected to local port 8333.
# Append line at end with date and count of addresses displayed.

netstat -an |
awk -v date="$(date)" '$6 == "ESTABLISHED" && /:8333/ { split($5, a, ":"); print a[1] ; n++ }
END { print "# " date " : " n " bitcoin clients seen." }'

#!/bin/sh
# Display foreign IP addresses coming from port 8333 --or-- connected to local port 8333.
# Append line at end with date and count of addresses displayed.

t="$(mktemp -t bitcoin)"

netstat -an |
awk '$6 == "ESTABLISHED" && /:8333/ { split($5, a, ":"); print a[1]}' |
tee "$t"

echo "# $(date) $(wc -l < $t) Bitcoin clients seen."

#!/bin/bash

urldecode() { echo -e "$(sed 'y/+/ /; s/%/\\x/g')"; }
error() {
    if [[ -n "$DISPLAY" ]]
    then zenity --error --text "$*"
    else echo "$*" 2>&1
    fi
    return 1
}

question() {
    echo -n "Do you want to send $1 BTC to this address $2 "
    if [[ -n "$3" ]]
    then echo -n "with '$3' as a comment"
    fi
    echo "?" ;
}

if
    uri="${uri#bitcoin:}"
    [[ -z "$uri" ]]
then error "usage: $0 bitcoin-URI"
elif
    addr="${uri%#*}"
    [[ ! "$addr" =~ ^[1-9a-km-zA-HJ-NP-Z]{34}$ ]]
then error "Wrong address format"
elif
    s=${uri##*#}
    amount=${s%\%*}
    [[ ! "$amount" =~ ^([1-9][0-9]*\.{,1}[0-9]*|0\.[0-9]*)$ ]]
then error "Wrong amount format"
    echo $_
elif comment="${uri##*%}"
    [[ -n "$DISPLAY" ]]
then
    zenity --question --text "$(question $amount $addr $comment)"
else
    read -p "$(question $amount $addr $comment) (y/N) " answer
    [[ "$answer" =~ ^[yY]$ ]]
fi && 

bitcoind sendtoaddress $addr $amount "$comment"

#!/bin/sh
echo "Content-type:	text/plain"
echo
netstat -an |
awk '/8333/ && /ESTA/ { print $5 }' |
sed 's/:8333//' |
tee >(echo "# $(date) $(wc -l) Bitcoin clients seen.")