Scraping the barrel....

#!/bin/sh
# Determine the current U.S. Terrorist Threat Advisory level, and output it to
# a serial device
#
# Written by Matt Mets in 2008
# Modified by Computothought in 2011
# This code is released into the public domain, attribution is appreciated

#### Configuration Options ##############################################

# Location of the threat alert level XML document
SRC_URL="http://www.dhs.gov/dhspublic/getAdvisoryCondition"

# Left for compatibility to original use of this code
# Serial device to output the result to (not used at this time)
# TTY_DEV="/dev/ttyS1"

#########################################################################

# Retrieve the current threat level
# We are expecting something like:
# <?xml version="1.0" encoding="UTF-8" ?>
# <THREAT_ADVISORY CONDITION="ELEVATED" />
ALERT_DOC=`wget ${SRC_URL} -q -O -`

# Do some rudimentary parsing using regular expressions to isolate the current
# threat level
# TODO: can this be done in one pass?
TMP=${ALERT_DOC#*CONDITION\=\"}
ALERT_LEVEL=${TMP%\" *}

# Convert the output into a serial command
# (The current system expects just a number 1-5)
case ${ALERT_LEVEL} in
    SEVERE)     COMMAND=5 ;;
    HIGH)       COMMAND=4 ;;
    ELEVATED)   COMMAND=3 ;;
    GUARDED)    COMMAND=2 ;;
    LOW)        COMMAND=1 ;;
esac

# If a threat level was retrieved, output it to the device
if [ -n ${COMMAND} ]
then
    # Send the command to the serial port (-n supresses the newline character)
    echo -n "Threat level is: "
    echo  ${COMMAND} ${ALERT_LEVEL} # > ${TTY_DEV}
    echo  Threat level is: ${COMMAND} ${ALERT_LEVEL} > tl
    twidge update < tl
    exit 0
else
    exit 1
fi

# Get today's weather
ZIP=77331
elinks "http://www.weather.com/weather/print/$ZIP" > weather ; cat weather | grep Today

# Get today's horoscope
hsign="VIRGO"
lynx -width 1000   -dump "http://www.creators.com/lifestylefeatures/horoscopes/horoscopes-by-holiday.html" > hscope ; cat hscope | grep $hsign