Index: zdiff.in
===================================================================
--- zdiff.in.orig
+++ zdiff.in
@@ -105,15 +105,17 @@ elif test $# -eq 2; then
 				5<&0
 		    then
 			gzip_status=$(
-			  exec 4>&1
-			  (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- |
-			    ( (gzip -cdfq -- "$2" 4>&-; echo $? >&4) 3>&- 5<&- </dev/null |
-			       eval "$cmp" /dev/fd/5 -) 5<&0
+			  exec 4>&1 6<&0
+			  (gzip -cdfq -- "$1" 4>&-; echo $? >&4) 3>&- 6<&- |
+			    ( (gzip -cdfq -- "$2" 4>&- 0<&6 6<&-; echo $? >&4) 3>&- 5<&- </dev/null |
+			       eval "$cmp" /dev/fd/5 - >&3) 5<&0
 			)
+			cmp_status=$?
 			case $gzip_status in
 			  *[1-9]*) gzip_status=1;;
 			  *) gzip_status=0;;
 			esac
+			(exit $cmp_status)
 		    else
 			F=`expr "/$2" : '.*/\(.*\)[-.][zZtga]*$'` || F=$prog
 			tmp=