busybox/examples/var_service/dhcp_if/run

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#!/bin/sh
exec 2>&1
exec </dev/null
pwd="$PWD"
if="${PWD##*/dhcp_}"
echo "* Upping iface $if"
ip link set dev "$if" up
echo "* Starting udhcpc"
exec \
env - PATH="$PATH" \
softlimit \
setuidgid root \
udhcpc -vv \
--hostname=null \
--foreground \
--interface="$if" \
--pidfile="$pwd/udhcpc.pid" \
--script="$pwd/dhcp_handler"