ircbot

#!/bin/bash

#
# SIMPLE CONFIG
#
SERV="irc.overthewire.org"
PORT="6667"
CHAN="#/dev/random"
NICK="anonbot"
USER="$NICK"
OWNR="$NICK"

#
# INITIALIZATION
#
#RAND=$(od -An -tx2 -N 2 /dev/random | cut -d' ' -f2);
#NICK="$NICK$RAND"
echo "Using NICK: $NICK"

exec 3<"/dev/tcp/$SERV/$PORT"
sleep 2
echo "NICK $NICK" >&3
echo "USER $USER 8 * : $USER" >&3
sleep 3
echo "JOIN $CHAN" >&3

#
# MAIN LOOP
#
while IFS="" read -r line <&3 ;
do
#
# FOR DEBUG ONLY ( PRINT EVERY LINE FROM THE SERVER !)
#
 echo "INFO: $line"

#
# DIVIDE $LINE INTO PARTS INTO PIECES OF INFORMATION
# Here we extract the obviously important information from the message from the server into parts!
#
 line=$(echo "$line" | sed -e 's/[\r\n]$//')

 icmd=$(echo "$line" | cut -d' ' -f2)
 ping=$(echo "$line" | cut -d' ' -f1)
 pong=$(echo "$line" | cut -d' ' -f2-)
 nick=$(echo "$line" | cut -d':' -f2 | cut -d'!' -f1)
 user=$(echo "$line" | cut -d'!' -f2 | cut -d'@' -f1)
 mess=$(echo "$line" | cut -d':' -f3-)

#
# WHILE NO PING OR PRIVMSG IRC COMMANDS ARRIVE... DON'T DO SHIT
#
 if [ "$ping" == "PING" ] ; then
  echo "$ping $pong" | tr 'PING' 'PONG' >&3
  continue
 fi

 if [ "$icmd" != "PRIVMSG" ] ; then
  continue
 fi

#
# AUTO-AUTHORIZING (TODO: Better ways exist, and I'll implement them somethime!)
#
# "Parental system", which means that each parent controls it's sibling(s) !? ;D
#
 if [ "$nick" == "$OWNR" ] ; then priv="root"; else priv="nobody"; fi

#
# PUBLIC/GUEST/CHANNEL COMMANDS
#
 if [ "$mess" == "!src" ] ; then
  cat $0 | while read -r catline ; do
   if [ "$(echo $catline | cut -d'#' -f1-)"  == "" ] ; then
    echo "PRIVMSG $nick : N" | tr 'N' '\n' >&3
   else
    echo "PRIVMSG $nick :$catline" | tr '\t' ' ' >&3
   fi
  done
 fi

# if [ $priv != "root" ] ; then
#  continue
# fi

#
# OWNER COMMANDS
#
 if [ "$priv" == "root" ] ; then
  if [ "$mess" == "!die" ] ; then
   echo "PRIVMSG $nick :$nick: Killing myself on your command!" >&3
   echo "QUIT" >&3
   exit 0
  fi
 fi

done

echo "QUIT" >&3
./$0

#
# END OF SOURCE, HAPPY (AU/E)DITING! ;D
#