I've had variations of this script kicking around in my .bash_history for quite some time now. The first version of it merely printed a random word from my dictionary file at a rate of one per second. This served as a source of inspiration/entropy for irc conversations and Flickr titles. Today, I decided to extend this one-liner to generate eight-words-at-a-time at a variable rate and jigger the output into an irssi process to amuse the good netizens. Here is the implementation for randoword.sh.

#!/bin/sh
i=0 
while true; do 
  let i=$i+1
  dictionary="/usr/share/dict/linux.words"
  dl=($(wc -l $dictionary))
  echo -n "randowords #$i: "
  for j in $( seq 1 8 ); do 
    head -n$(($(head -c4 /dev/urandom | od -An -tu4) % $dl))\
    $dictionary| tail -n1
  done | xargs
  sleep $((RANDOM % 3600))
done

Update: I never really understood how to use random numbers within a bash script without invoking perl (or equivalent). In light of _fool's comment, I rewrote my script using only bash and POSIX commands. I had to break-out /dev/urandom and od because bash's $RANDOM variable only produces random values up to 32767. Technically, it'd be a whole lot faster for a C program to use a pointer to jump around randomly in the dictionary, but that seems too much like work.

Update 2: The seq command probably isn't POSIX.

Update 3: In Ruby: ruby -e ' $w=STDIN.readlines; 8.times{print "#{$w[rand(483523)].chomp} "}' < /usr/share/dict/linux.words

# pass to name server to make hostname canonical
# R$* $| $* < @ $* > $*         $: $2 < @ $[ $3 $] > $4

It's absolutely wrong to do this because if you edit sendmail.mc, and restart sendmail, the cf file gets regenerated automatically which obliterates the change. Is there a better way to fix this without violating RFCs and changing sendmail rulesets? Note: I don't have access to the DNS server.

pathmunge () {
  if ! echo $PATH | /bin/egrep -q '(^|:)$1($|:)' ; then
    if [ "$2" = "after" ] ; then
      PATH=$PATH:$1
    else
      PATH=$1:$PATH
    fi
  fi
}