--- zdiff.in	2002-09-26 04:33:24.000000000 -0400
+++ zdiff.in.new	2004-10-26 19:06:08.000000000 -0400
@@ -35,6 +35,10 @@
 	echo "Usage: $prog [${comp}_options] file [file]"
 	exit 2
 fi
+tmp=`tempfile -d /tmp -p gz` || {
+	echo 'cannot create a temporary file' >&2
+	exit 1
+}
 set $FILES
 if test $# -eq 1; then
 	FILE=`echo "$1" | sed 's/[-.][zZtga]*$//'`
@@ -47,11 +51,11 @@
 	        *[-.]gz* | *[-.][zZ] | *.t[ga]z)
 			F=`echo "$2" | sed 's|.*/||;s|[-.][zZtga]*||'`
 			set -C
-			trap 'rm -f /tmp/"$F".$$; exit 2' HUP INT PIPE TERM 0
-			gzip -cdfq "$2" > /tmp/"$F".$$ || exit
-                        gzip -cdfq "$1" | $comp $OPTIONS - /tmp/"$F".$$
+			trap 'rm -f $tmp; exit 2' HUP INT PIPE TERM 0
+			gzip -cdfq "$2" > $tmp || exit
+			gzip -cdfq "$1" | $comp $OPTIONS - $tmp
                         STAT="$?"
-			/bin/rm -f /tmp/"$F".$$ || STAT=2
+			/bin/rm -f $tmp || STAT=2
 			trap - HUP INT PIPE TERM 0
 			exit $STAT;;