#!/bin/bash

wallpapers=(~/Desktop/wallpapers/*)

wallpaper_count=${#wallpapers[@]}
random_wallpaper=${wallpapers[(((wallpaper_count - 1) * RANDOM / 32767))]}
dcop kdesktop KBackgroundIface setWallpaper "$random_wallpaper" 4

#!/bin/bash
# random_wallpaper.sh
# Reads a given directory and set a random
# wallpaper using the images on that dir.
# Set WALLPAPERDIR and change feh --scale-bg
# to your likings

WALLPAPERDIR="$HOME/wallpapers"

if [[ -d "${WALLPAPERDIR}" ]]
then
        files=$(ls "${WALLPAPERDIR}")
        file_matrix=($files)
        num_files=${#file_matrix[*]}
        feh --bg-scale "${WALLPAPERDIR}/${file_matrix[$((RANDOM%num_files))]}"
fi

exit 0

#!/bin/bash
# random_wallpaper_slideshow.sh
# Reads a given directory and set a random
# wallpaper using the images on that dir.
# The script stays resident until you kill it
# and changes the background periodically.
# The period is adjustable by the sleep command

WALLPAPERDIR="$HOME/wallpapers"

if [[ -d "${WALLPAPERDIR}" ]]
then
        while(true)
        do
                files=$(ls "${WALLPAPERDIR}")
                file_matrix=($files)
                num_files=${#file_matrix[*]}
                feh --bg-scale "${WALLPAPERDIR}/${file_matrix[$((RANDOM%num_files))]}"
                sleep 10m
        done
fi

exit 0

#!/bin/bash

# At least the image switching delay needs to be specifed on cmd line
delay=${1?"Usage: wploop DELAY [IMAGE_PATH]"}

# Make sure the image switching delay is not unreasonably small
if [ "1" -gt "$delay" ]; then
   echo Minimum delay is 1 seconds
   exit
fi

#  If the second parameter has been specified, it is interpreted as a path to image folder
imgPath=${2-*}
if [ "$imgPath" != "*" ]; then
   find "${imgPath}" | grep -i .jpg > .background_list
fi

if [ ! -e .background_list ]; then
   echo No image list to load!
   exit
fi

if [ ! -e .background_no ]; then
   echo > .background_no 0
fi

# Get the number of images in the image list
img_no_max=`awk 'END {print NR}' .background_list`

# Set the next root window image, delay for a while, repeat..
while [ 1 ]; do
   # Get the order number of the previous image in the image list
   img_no=`cat .background_no`

   # Increase the order number for the next image. Reset the count if last image has been displayed
   img_no=$[$img_no+1]
   if [ "$img_no" -gt "$img_no_max" ]; then
      img_no=1
   fi
   echo > .background_no $img_no

   # Get the image name, according to the order number
   img_name=`awk -v no=$img_no 'NR==no {print}' .background_list`
   # Display the image
   hsetroot -center $img_name
   sleep $delay
done

#!/bin/sh

wget 'http://antwrp.gsfc.nasa.gov/apod/astropix.html' -qO- | awk 'BEGIN { RS="</a>"; } /IMG/ { print("http://antwrp.gsfc.nasa.gov/apod/" gensub(/.*<a href="([^"]+)">.*/, "\\1", "")); }' | wget -qi- -O ~/.apod.jpg && dcop kdesktop KBackgroundIface setWallpaper ~/.apod.jpg 8