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#!/bin/sh
#
# Petitboot udhcpc user script.  Should be run by udhcpc when
# there is a change in the dhcp configuration.  For more info
# see the udhcpc man page and the Linux kernel source file
# Documentation/filesystems/nfsroot.txt.
#

PBOOT_USER_EVENT_SOCKET="/tmp/petitboot.ev"
log="/var/log/petitboot/pb-udhcpc.log"

pb_add () {
	# Looks like udhcpc will give us different names, depending if the
	# parameter was in the header, or specified by options
	[ -z "$bootfile" ] && bootfile=${boot_file}

	mac=$(< /sys/class/net/$interface/address)
	paramstr=''

	# Collect relevant DHCP response parameters into $paramstr
	for name in conffile bootfile mac ip siaddr serverid tftp
	do
		value=$(eval "echo \${$name}")
		[ -n "$value" ] || continue;

		paramstr="$paramstr $name=$value"
	done

	pb-event dhcp@{interface} $paramstr

	# Check if an explicit config file present
	if [ -n "${conffile}" ]
	then
		return;
	fi

        # Finally, add an option for the boot_file parameter
	paramstr='name=netboot'

	# Collect relevant parameters to add an option to the boot_file parameter
	for name in rootpath siaddr boot_file
        do
                value=$(eval "echo \${$name}")
                [ -n "$value" ] || continue;

                paramstr="$paramstr $name=$value"
        done

	pb-event add@{interface} $paramstr
}

pb_remove () {
	pb-event remove@${interface} name=netboot
}

case "$1" in
bound)
	pb_add
	;;
deconfig)
	pb_remove
	;;
*)
	;;
esac

printf "--- $1 ---\n" >> ${log}
set >> ${log}
printf "---------------\n" >> ${log}
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