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#!/bin/ash
wait_for_iface() {
local DEVICE=$1
local TIMEOUT="$(( "$2" * 2 ))"
local state laststate
echo -n "Waiting for interface $DEVICE: "
# Some systems don't have operstate. Seems to be hardware dependent
[ -e "/sys/class/net/${DEVICE}/operstate" ] || sleep 1
if [ -e "/sys/class/net/${DEVICE}/operstate" ]; then
while true; do
# check linkstate
state="$(cat "/sys/class/net/${DEVICE}/operstate")"
[ "$state" != "$laststate" ] && echo -n "[$state]"
laststate="$state"
[ "$state" = "up" ] && break
TIMEOUT=$(( TIMEOUT - 1 )) # don't wait forever, the pcnet iface of vmware will never be "up" although it's working
if [ "$TIMEOUT" -le 0 ];then
echo -n "TIMEOUT"
break
fi
# 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
echo -n "... no operstate, let's hope for the best..."
fi
echo
}
true
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