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wait_for_iface() {
local DEVICE=$1
local TIMEOUT=20
echo -n "Waiting for interface $DEVICE: "
# Some systems don't have operstate. Seems to be hardware dependent
[ ! -e "/sys/class/net/${DEVICE}/operstate" ] && usleep 10000
if [ -e "/sys/class/net/${DEVICE}/operstate" ]; then
while true; do
# check linkstate
[ "x$(cat "/sys/class/net/${DEVICE}/operstate")" == "xup" ] && break
TIMEOUT=$(( TIMEOUT - 1 )) # don't wait forever, the pcnet iface of vmware will never be "up" although it's working
[ "$TIMEOUT" -le 0 ] && break
# else
echo -n "."
usleep 500000
done
else
# we really don't have a operstate .. then just wait a sec and hope for the best.
sleep 1
fi
echo ".$(cat "/sys/class/net/${DEVICE}/operstate" 2>/dev/null)"
}
true
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