--- predict-update.old	2007-01-07 18:42:19.000000000 -0500
+++ predict-update	2007-01-07 18:39:26.000000000 -0500
@@ -1,8 +1,7 @@
 #!/bin/sh
-PV=
+oldpwd=$PWD
 
 if [ ! -f ~/.predict/predict.tle ]; then
-	oldpwd=$PWD
 	mkdir -p ~/.predict
 	cd ~/.predict
 	cat > predict.tle << EOF
@@ -79,10 +78,15 @@
 1 26929U          02216.67548843  .00042169  00000-0  00000-0 0     9
 2 26929  67.0426 246.5544 0011326 237.9129 122.0981 15.57367567 47636
 EOF
-	cd $oldpwd
 fi
-wget -qc www.celestrak.com/NORAD/elements/amateur.txt -O /tmp/amateur.txt
-wget -qc www.celestrak.com/NORAD/elements/visual.txt -O /tmp/visual.txt
-wget -qc www.celestrak.com/NORAD/elements/weather.txt -O /tmp/weather.txt
-predict -u /tmp/amateur.txt /tmp/visual.txt /tmp/weather.txt
-rm /tmp/amateur.txt /tmp/visual.txt /tmp/weather.txt
+
+mkdir /tmp/predict-$$ || exit 1
+cd /tmp/predict-$$
+
+wget -qc www.celestrak.com/NORAD/elements/amateur.txt -O ./amateur.txt
+wget -qc www.celestrak.com/NORAD/elements/visual.txt -O ./visual.txt
+wget -qc www.celestrak.com/NORAD/elements/weather.txt -O ./weather.txt
+predict -u ./amateur.txt ./visual.txt ./weather.txt
+
+cd ${oldpwd}
+rm -fr /tmp/predict-$$