{"id":391,"date":"2011-01-28T00:30:38","date_gmt":"2011-10-30T05:51:50","guid":{"rendered":"http:\/\/kraftek.com\/blog\/random-wallpaper-in-gnome\/"},"modified":"2011-01-28T00:30:38","modified_gmt":"2011-10-30T05:51:50","slug":"random-wallpaper-in-gnome","status":"publish","type":"post","link":"\/blog\/index.php\/random-wallpaper-in-gnome\/","title":{"rendered":"random wallpaper in gnome"},"content":{"rendered":"

Say you want a random Gnome wallpaper from google each 60 seconds, but if your machine is not connected, just take
\nthe backdrop from a local directory ~\/Desktop\/backdrops. you can put up a couple of scripts to do this, the main one
\nwould be \/scripts\/changewall.ksh<\/p>\n

#!\/bin\/bash<\/em>
\nmkdir -p \/tmp\/wallpapers<\/em><\/p>\n

E=`ps -ef | grep -i changewall | grep -i $USER | grep -iv grep | wc -l`<\/em>
\nif [ $E -gt 2 ];then<\/em>
\n\u00a0\u00a0 \u00a0echo “wallpaper changer already running for $USER”<\/em>
\n\u00a0\u00a0 \u00a0exit 1<\/em>
\nfi<\/em><\/p>\n

i=120<\/em>
\nwhile true;do<\/em>
\n\u00a0\u00a0 \u00a0i=`cat \/scripts\/time.txt`<\/em>
\n\u00a0\u00a0 \u00a0rm -fR \/tmp\/wallpapers\/*<\/em>
\n\u00a0\u00a0 \u00a0RANGE=10<\/em>
\n\u00a0\u00a0 \u00a0number=$RANDOM<\/em>
\n\u00a0\u00a0 \u00a0let “number %= $RANGE”<\/em>
\n\u00a0\u00a0 \u00a0number=$(($number))<\/em>
\n\u00a0\u00a0 \u00a0ping -w 10 -c 2 www.google.com > \/dev\/null 2>&1<\/em>
\n\u00a0\u00a0 \u00a0R=$?<\/em>
\n\u00a0\u00a0 \u00a0if [ $R -eq 0 ]\u00a0 && [ $number -lt 9 ];then<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\/scripts\/wallpaper.ksh > \/dev\/null 2>&1<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0F=`ls \/tmp\/wallpapers`<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0N=`echo $F | wc -c`<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if [ $N -gt 1 ];then<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0gconftool-2 -t string -s \/desktop\/gnome\/background\/picture_filename “\/tmp\/wallpapers\/$F”<\/em>
\n#\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0cp “\/tmp\/wallpapers\/$F” $HOME\/Desktop\/backdrops\/<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0else<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0cd $HOME\/Desktop\/backdrops<\/em>
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ls -1 *.jpg | head -n`expr $RANDOM % `ls -1 *.jpg | wc -l“ | tail -n1 | echo `pwd`\/`xargs` | gconftool-2 -t string -s \/desktop\/gnome\/background\/picture_filename “`xargs`”<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0fi<\/em>
\n\u00a0\u00a0 \u00a0else<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0cd $HOME\/Desktop\/backdrops\u00a0\u00a0 \u00a0<\/em>
\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0ls -1 *.jpg | head -n`expr $RANDOM % `ls -1 *.jpg | wc -l“ | tail -n1 | echo `pwd`\/`xargs` | gconftool-2 -t string -s \/desktop\/gnome\/background\/picture_filename “`xargs`”<\/em>
\n\u00a0\u00a0 \u00a0fi<\/em>
\n\u00a0\u00a0 \u00a0sleep $i<\/em>
\ndone<\/em><\/p>\n

Then you would need the support script, to get images from google according to a random word that comes
\nfrom \/scripts\/wallpaper-subjects.txt program: \/scripts\/wallpaper.ksh<\/p>\n

#!\/bin\/ksh<\/em>
\ncat \/scripts\/wallpaper-subjects.txt | head -n`expr $RANDOM % `cat \/scripts\/wallpaper-subjects.txt | wc -l“ | tail -n1 > \/tmp\/subject<\/em>
\nQUERY=`cat \/tmp\/subject | sed ‘s\/ \/%20\/g’`<\/em>
\nRANGE=10<\/em>
\nnumber=$RANDOM<\/em>
\nlet “number %= $RANGE”<\/em>
\nnumber=$(($number + 1))<\/em><\/em>
\nIMG=`curl -m 10 -A “Mozilla\/3.0 (compatible; AvantGo 3.2)” “http:\/\/images.google.com\/images?as_q=${QUERY}&as_filetype=jpg&biw=1680&bih=1024&safe=active&as_st=y&tbs=isch:1,itp:photo,islt:2mp,isz:l,ift:jpg” 2>\/dev\/null |sed -e ‘s\/>\/>n\/g’ | awk ‘{s=substr($0,index($0,”http”),index($0,”jpg”));print substr(s,1,index(s,”.jpg”)+3)}’ | grep jpg |egrep -v ‘starkeith|gstatic|scaredmonkeys|tripod|flickr’|sed ‘s\/2520\/20\/g’ | head -$number | tail -1`<\/em><\/p>\n

mkdir -p \/tmp\/wallpapers<\/em>
\ncd \/tmp\/wallpapers<\/em>
\nwget –timeout=10 $IMG<\/em><\/p>\n

you can add \/scripts\/changewall.ksh to your autostart stuff in gnome, going to system –> preferences –>
\nstartup applications
\nENJOY!<\/p>\n","protected":false},"excerpt":{"rendered":"

Say you want a random Gnome wallpaper from google each 60 seconds, but if your machine is not connected, just take the backdrop from a local directory ~\/Desktop\/backdrops. you can put up a couple of scripts to do this, the main one would be \/scripts\/changewall.ksh #!\/bin\/bash mkdir -p \/tmp\/wallpapers E=`ps -ef | grep -i changewall […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-391","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"\/blog\/index.php\/wp-json\/wp\/v2\/posts\/391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=391"}],"version-history":[{"count":0,"href":"\/blog\/index.php\/wp-json\/wp\/v2\/posts\/391\/revisions"}],"wp:attachment":[{"href":"\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=391"},{"taxonomy":"post_tag","embeddable":true,"href":"\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}