busybox/examples/var_service/dhcp_if/run

#!/bin/sh

exec 2>&1
exec </dev/null

pwd="$PWD"

if="${PWD##*/dhcp_}"

echo "* Upping iface $if"
ip link set dev "$if" up || exec sleep 5

echo "* Starting udhcpc on $if [$$]"
exec \
env - PATH="$PATH" \
softlimit \
setuidgid root \
udhcpc -vv \
--hostname=null \
--foreground \
--interface="$if" \
--pidfile="$pwd/udhcpc.pid" \
--script="$pwd/dhcp_handler"