生成壁纸列表xml并应用到系统，适用于gnome

gnome_wallpaper_helper.sh

#!/bin/bash
DIR1="`dirname $BASH_SOURCE`"
DIR=`readlink -f "$DIR1"`
files=$(find "$DIR" -maxdepth 3 -iregex ".*\.\(png\|jpg\|jpeg\|bmp\|gif\)$")
last_file="empty"
mode=${1:-zoom}
xml=${2:-"mylist.xml"}
static=${3:-600.0}
transition=${4:-5.0}
echo `date`
echo "Mode=$mode FileName=$xml Static=$static Transition=$transition"
echo "maxdepth=3"
echo "----------------------------------------------------------"
echo "$files"

echo "<background>" > $DIR/$xml
echo "	<starttime>" >> $DIR/$xml
echo "		<year>`date +%Y`</year>" >> $DIR/$xml
echo "		<month>`date +%m`</month>" >> $DIR/$xml
echo "		<day>`date +%d`</day>" >> $DIR/$xml
echo "		<hour>`date +%H`</hour>" >> $DIR/$xml
echo "		<minute>`date +%M`</minute>" >> $DIR/$xml
echo "		<second>`date +%S`</second>" >> $DIR/$xml
echo "	</starttime>" >> $DIR/$xml

echo "$files" | while read current_file
do
	if [[($last_file == "empty")]]
	then
		last_file=$current_file
		echo "	<static>" >> $DIR/$xml
		echo "		<duration>$static</duration>" >> $DIR/$xml
		echo "		<file>$last_file</file>" >> $DIR/$xml
		echo "	</static>" >> $DIR/$xml
	else
		echo "	<transition>" >> $DIR/$xml
		echo "		<duration>$transition</duration>" >> $DIR/$xml
		echo "		<from>$last_file</from>" >> $DIR/$xml
		echo "		<to>$current_file</to>" >> $DIR/$xml
		echo "	</transition>" >> $DIR/$xml
		echo "	<static>" >> $DIR/$xml
		echo "		<duration>$static</duration>" >> $DIR/$xml
		echo "		<file>$current_file</file>" >> $DIR/$xml
		echo "	</static>" >> $DIR/$xml
		last_file=$current_file	
	fi
done
echo "</background>" >> $DIR/$xml

gsettings set org.gnome.desktop.background picture-uri "file://$DIR/$xml"
gsettings set org.gnome.desktop.background picture-options $mode

echo "----------------------------------------------------------"
echo "done"

#Use:
$ ./gen_gnome_wallpaper_xml.sh mode name.xml duration_time transition_time
#Example:
$ ./gen_gnome_wallpaper_xml.sh zoom mylist.xml 600.0 5.0