Live Webcam Wallpaper Script for Ubuntu

live_webcam_wallpaper_ubuntu.sh

#!/bin/bash
# Updates your desktop with an hourly updated image from (in this case Ocean Beach, SF) a webcam jpeg url.
# Uses: cronjob, curl, convert, gsettings
# Example screenshot: https://dl.dropbox.com/u/1907097/live_webcam_wallpaper_ubuntu.png

# My cronjob setup, runs on minute :01 every hour 
# 1    *   *   *   *    /path/to/live_webcam_wallpaper_ubuntu.sh &> /dev/null

if [[ -z "$DBUS_SESSION_BUS_ADDRESS" ]]; then
  source "$HOME/.dbus/session-bus"/*-0 && export DBUS_SESSION_BUS_ADDRESS
fi
# The -break image is to ensure Ubuntu reloads the image, and we son't want to keep all the old images
SFIMG="/path/to/webcam-wall.jpg"
RMIMG="/path/to/webcam-wall-break.jpg"
if [ -f "$SFIMG" ]; then
  SFIMG="/path/to/webcam-wall-break.jpg"
  RMIMG="/path/to/webcam-wall.jpg"
fi
DISPLAY=:0.0 curl -L --silent --user-agent "Mozilla/5.0 (X11; Linux i686) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.43 Safari/536.11" \
  --referer "http://ob-kc.com/current.html" "http://ob-kc.com/images/current_lg.jpg" -o "$SFIMG"
if [ ! $? -eq 0 ]; then
  exit 1
fi
FILE_MIME=$(file -b "$SFIMG")
# Ensure we got an image and not an error (textfile)
if [[ "$FILE_MIME" =~ ^JPEG ]]; then
  LOCALTIME="$(date +'%s')"
  # This is specific to my script, it sets the clock back 9 hours for San Francisco <> Sweden
  #LOCALTIME=$((LOCALTIME - 32400))
  DATE="$(date --date="@$LOCALTIME" +'%Y-%m-%d %H:%M')"
  # Resize to fit my display, and add the timestamp
  DISPLAY=:0.0 /usr/bin/convert "$SFIMG" -auto-orient -quality 100 -resize 1366^x768 -gravity center -crop 1366x768+0+ \
  -font Ubuntu-Regular -pointsize 20 -fill black -annotate +570+346 "$DATE" -fill white -annotate +571+345 "$DATE" "$SFIMG"
  if [ ! $? -eq 0 ]; then
    exit 1
  fi
  sleep 1
  # For Ubuntu 12.10
  DISPLAY=:0.0 gsettings set org.gnome.desktop.background picture-uri file://$SFIMG
  # This might be the right way for [other dists / gnome]
  # DISPLAY=:0.0 gconftool-2 --type string --set /desktop/gnome/background/picture_filename "$SFIMG"
  sleep 1
  rm "$RMIMG"
  exit 0
else
  exit 1
fi