CentOSで壁紙を変更するシェルスクリプト

changewp.sh

#!/bin/bash

function export_variables
{
  pid=$(pgrep -u `whoami` gnome-panel )

  for dbusenv in $pid; do
    DBUS_SESSION_BUS_ADDRESS=$( grep -z DBUS_SESSION_BUS_ADDRESS /proc/$pid/environ | sed -e 's/DBUS_SESSION_BUS_ADDRESS=//' )

    data="DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS"
    eval " export $data"
  done
}

WALLPAPERS="/home/masaf/wallpapers/*"

# 壁紙ファイルを配列に格納
declare -a wallpaperFiles
current=$(gconftool-2 --get "/desktop/gnome/background/picture_filename")
echo $(date "+%Y/%m/%d %H:%M:%S") "current wallpaper is $current"

for file in $WALLPAPERS
do
  if [ $file != $current ]; then
    if [ wallpaperFiles[0] == "" ]; then
      wallpaperFiles[0]=$file
    else
      wallpaperFiles[${#wallpaperFiles[*]}]=$file
    fi
  fi
done

# 壁紙ファイルをランダムに選び出す
wallpaperFile=${wallpaperFiles[`expr $RANDOM % ${#wallpaperFiles[*]}`]}

# 選んだ壁紙ファイルを適用する
export_variables
gconftool-2 --type string --set "/desktop/gnome/background/picture_filename" $wallpaperFile
gconftool-2 --type string --set "/desktop/gnome/background/picture_options" zoom
echo $(date "+%Y/%m/%d %H:%M:%S") "changed to $wallpaperFile"