Shell script to tweet from the command line. Breaks longer messages into multiple tweets. Requires curl.

tweet.sh

#!/usr/bin/env bash

# Post a tweet
#
# @param ... - tweet
tweet()
{
	# Make a SSL request
	#
	# @param ... - request arguments
	request()
	{
		curl -sL3 -b "$CF" -c "$CF" "$@"
	}

	# Extract and echo OAuth token from given URL
	#
	# @param 1 - URL to retrieve token from
	token()
	{
		local D
		D=$(request "$1")
		D=${D##*authenticity_token}
		D=${D#*value=\"}
		echo "${D%%\"*}"
	}

	local CF URL='https://mobile.twitter.com' T=${*:-$(cat)} RV=1
	CF=$(mktemp -t ".${0##*/}-XXXX") || return 1

	# oauth requests
	{
		request \
			-d "authenticity_token=$(token "$URL/session/new")&username=$TWITTER_USERNAME&password=$TWITTER_PASSWORD" \
			$URL/session &&
		request \
			-d "authenticity_token=$(token "$URL/compose/tweet")&tweet[text]=${T// /+}&tweet[display_coordinates]=false" \
			$URL &&
		request \
			-d "authenticity_token=$(token "$URL/account")" \
			$URL/session/destroy &&
		RV=0
	} &>/dev/null

	rm -f "$CF"

	return $RV
}

# Cut some text into smaller snippets without cutting words in half
#
# @param ... - text to cut (optional)
snip()
{
	local TEXT=$* LIMIT=${LIMIT:-140} GLUE=${GLUE:-'..'}

	(( LIMIT -= ${#GLUE} ))

	local N
	for (( N=0; ${#TEXT} > LIMIT; ++N ))
	do
		local S=${TEXT:0:$LIMIT}
		local U=${S%[ $'\n']*}
		(( N > 0 )) && echo -n "$GLUE"
		if [ "$U" ]
		then
			echo -n "$U"
			TEXT=${TEXT:${#U}}
		else
			echo -n "$S"
			TEXT=${TEXT:$LIMIT}
		fi
		echo "$GLUE"
		(( N == 0 )) && (( LIMIT -= ${#GLUE} ))
	done

	(( N > 0 )) && echo -n "$GLUE"
	echo "$TEXT"
}

# Send message in one or more tweets
#
# @param ... - message (optional)
smart_tweet()
{
	snip "${@:-$(cat)}" | while read -r
	do
		tweet "$REPLY" || break
	done
}

if [ "${BASH_SOURCE[0]}" == "$0" ]
then
	# Get string form stdin
	#
	# @param 1 - prompt
	gets()
	{
		read -r -p "$1: " && echo "$REPLY"
	}

	if (( $# ))
	then
		TWITTER_USERNAME=${TWITTER_USERNAME:-$(gets 'user')}
		TWITTER_PASSWORD=${TWITTER_PASSWORD:-$(gets 'pass')}
	fi

	if [ -z "$TWITTER_USERNAME" ] || [ -z "$TWITTER_PASSWORD" ]
	then
		echo 'error: you need to set a user name and a password'
		exit 1
	fi

	smart_tweet "$@"
fi

What do I need to change or set up to get this to work?