Zufällige Google-Suchen ausführen

#!/bin/sh
########################################################################
#
# randsurf
# (c) 2013 Elias Schwerdtfeger, http://www.tamagothi.de/
#
# Sending randomized search requests to popular search engine to make
# NSA tracking more senseless.
#
# This software is licensed under the terms of the pirate's license.
# Share and enjoy, but don't sue me! ;)
#
# http://www.tamagothi.de/impressum/lizenz/
#
# $Id: randsurf,v 1.1 2015/02/05 22:01:50 elias Exp $
#
########################################################################

PATH=/bin:/usr/bin

########################################################################
#
# Configuration
# Change settings here
#
########################################################################
#
# Wordlist to use
# ---------------
#
# A german wordlist
#
wordlist=/usr/share/dict/ngerman
#
# Most people prefer English... ;)
#
# wordlist=/usr/share/dict/words
#
#
# Randomizer settings
# -------------------
#
# If you invoke the script via crontab, you probably want some
# irregularity. A request every five minutes is easy to detect as
# mechanical request, so better wait a random amount of time. And
# don't do it on every invocation, do it only sometimes. That
# looks much less automatically performed and helps to make filtering
# your real searches out of the noise more challenging for the
# "United Stasi of America". ;)
#
# Percentage of execution
#
search_percent=50
#
# Maximal random delay in seconds before a search request is performed
#
search_delay=299
#
# Search engine URI
# I use the german google here
#
search_uri='http://www.google.de/search?q='
#
# Faked user agent
# Just an example. Use the user agent string of your preferred browser here
user_agent='Mozilla/5.0 (Windows NT 5.1; rv:16.0) Gecko/20100101 Firefox/16.0'

########################################################################
#
# Program
# Change the following lines only if you know what you are doing...
#
########################################################################

# Cannot use $RANDOM if someone doesn't use bash
set `awk "END {
    srand()
    print int(rand() * 100), int(rand() * $search_delay)
    }" </dev/null`
randnum=$1;
delaytime=$2;

# Shall we execute a search?
test $randnum -lt $search_percent || exit

# Delay
sleep $delaytime

# Pick one random word from the wordlist.
# Once again cannot use $RANDOM for non-bashers. ;)
word_count=`wc -l $wordlist | sed 's/ .*$//'`
word_index_select=`awk "END {
    srand()
    printf(\"%d\", int(rand() * $word_count+1))
    }" </dev/null`
word_select=`sed -n ${word_index_select}p $wordlist`

# And now perform a search using curl
curl -s -A "$user_agent" "${search_uri}$word_select" >/dev/null