busybox/examples/var_service/dhcpd_if/run

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#!/bin/sh
exec 2>&1
exec </dev/null
pwd="$PWD"
if="${PWD##*/dhcpd_}"
echo "* Upping iface $if"
ip link set dev $if up
>>udhcpd.leases
sed 's/^interface.*$/interface '"$if/" -i udhcpc.conf
echo "* Starting udhcpd"
exec \
env - PATH="$PATH" \
softlimit \
setuidgid root \
udhcpd -f -vv udhcpc.conf
exit $?