- mac=""
- for adaptor in /sys/class/net/*;do
- status=$(cat ${adaptor}/iflink)
- if [ ${status} -eq 2 ];
- then
- mac=$(cat ${adaptor}/address)
- mac=$(echo ${mac}|sed 's/:/-/g'|tr '[a-z]' '[A-Z]')
- fi
- done
- echo $mac
+ mac=""
+
+ for adaptor in /sys/class/net/*
+ do
+ status="$(cat ${adaptor}/iflink)"
+
+ if [ "${status}" -eq 2 ]
+ then
+ mac="$(cat ${adaptor}/address)"
+ mac="$(echo ${mac} | sed 's/:/-/g' | tr '[a-z]' '[A-Z]')"
+ fi
+ done
+
+ echo ${mac}