improve readability of ifplugd.action

$1 and $2 are easily mistaken and are not documented in the header

of the file. Assigning clear variable names improved readability and

makes it easier to change the script.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

--- conf/ifplugd.action.orig	2010-05-30 21:12:30.251833801 +0100

+++ conf/ifplugd.action	2010-05-30 21:14:11.601958801 +0100

@@ -19,12 +19,15 @@

 set -e

-if [ -z "$1" ] || [ -z "$2" ] ; then

+NETDEV="$1"

+ACTION="$2"

+

+if [ -z "$NETDEV" ] || [ -z "$ACTION" ] ; then

 	echo "Wrong arguments" > /dev/stderr

 	exit 1

 fi

-[ "$2" = "up" ] && exec /sbin/ifup $1

-[ "$2" = "down" ] && exec /sbin/ifdown $1

+[ "$ACTION" = "up" ] && exec /sbin/ifup "$NETDEV"

+[ "$ACTION" = "down" ] && exec /sbin/ifdown "$NETDEV"

 exit 1