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-rwxr-xr-xbin/NS2SetMac.sh22
1 files changed, 17 insertions, 5 deletions
diff --git a/bin/NS2SetMac.sh b/bin/NS2SetMac.sh
index 51810ae..e6111c7 100755
--- a/bin/NS2SetMac.sh
+++ b/bin/NS2SetMac.sh
@@ -1,2 +1,6 @@
-# store/set MAC address for given interface
+# this script is part of networksettings2 package
+# purpose : set fixed MAC address for network devices that
+# have random addresses (like usb)
+#
+
NS2MacStore=/etc/NS2
@@ -6,3 +10,3 @@ NS2MacStore=/etc/NS2
if [ -z "$1" ]
-then
+then
exit 0
@@ -10,6 +14,10 @@ fi
-if [ -f ${NS2MacStore}/$1.mac ]
+if [ -f ${NS2MacStore}/$1.mac ]
then
# set this mac
- /sbin/ifconfig $1 hw ether `cat ${NS2MacStore}/$1.mac`
+ X=`cat ${NS2MacStore}/$1.mac`
+ if [ ! -z "$X" ]
+ then
+ /sbin/ifconfig $1 hw ether $X
+ fi
else
@@ -19,3 +27,7 @@ else
X=${X%% *} # remove trailing spaces
- echo ${X} > ${NS2MacStore}/$1.mac
+ if [ ! -z "$X" ]
+ then
+ # valid mac address
+ echo ${X} > ${NS2MacStore}/$1.mac
+ fi
fi