linux自动更换壁纸脚本

使用注意事项：

1,脚本文件可执行

2,将switchbg.sh中的BGDIR设置为墙纸目录

3,在/etc/crontab中增加

*/5 *    * * *     test        /home/test/switchbg.sh >/dev/null 2>&1
设置为每5分钟更换壁纸。

switchbg.sh

-------------------------------------------

#!/bin/bash

. ./discover_session_bus_address.sh
export DISPLAY=:0
confFile="/tmp/.switchbg.conf"
BGDIR="${HOME}/WallPaper"
filepath=${BGDIR}

find $filepath | grep -i -E ".jpg$|.png$|.jpeg$|.bmp$" > $confFile
cnt=`cat $confFile | wc -l`

while true
do
    line=$(($RANDOM % $cnt + 1))
    bgfile=$(head -n $line $confFile | tail -n 1)
    bgfile="'file://$bgfile'"
    bkfile=$(gsettings get org.gnome.desktop.background picture-uri)
#   echo "old_wallpaper: $bkfile"
#   echo "new_wallpaper: $bgfile"
    if [ "$bkfile" != "$bgfile" ]
    then
        break
    fi

done
gsettings set org.gnome.desktop.background picture-uri "$bgfile"
rm -f $confFile
-------------------------

discover_session_bus_address.sh

---------------------------------------------

#!/bin/bash

# Remember to run this script using the command "source ./filename.sh"

# Search these processes for the session variable
# (they are run as the current user and have the DBUS session variable set)
compatiblePrograms=( nautilus kdeinit kded4 pulseaudio trackerd )

# Attempt to get a program pid
for index in ${compatiblePrograms[@]}; do
    PID=$(pidof -s ${index})
    if [[ "${PID}" != "" ]]; then
        break
    fi
done
if [[ "${PID}" == "" ]]; then
    echo "Could not detect active login session"
    return 1
fi

QUERY_ENVIRON="$(tr '\0' '\n' < /proc/${PID}/environ | grep "DBUS_SESSION_BUS_ADDRESS" | cut -d "=" -f 2-)"
if [[ "${QUERY_ENVIRON}" != "" ]]; then
    export DBUS_SESSION_BUS_ADDRESS="${QUERY_ENVIRON}"
    echo "Connected to session:"
    echo "DBUS_SESSION_BUS_ADDRESS=${DBUS_SESSION_BUS_ADDRESS}"
else
    echo "Could not find dbus session ID in user environment."
    return 1
fi

return 0