#!/bin/sh
# vi: ts=4 noexpandtab

BURL="http://169.254.169.254/2009-04-04"
MDURL="${BURL}/meta-data"
UDURL="${BURL}/user-data"
STATE_D=/var/lib/cloud
SEM_D=$STATE_D/sem
CLOUD_CONFIG=${STATE_D}/config.sh
MD_DEBUG_COUNT=30
MD_MAX_TRIES=30
IS_NOCLOUD=0

[ -d "${STATE_D}" ] || mkdir -p "${STATE_D}"

[ -f "${CLOUD_CONFIG}" ] && . "${CLOUD_CONFIG}"
# CLOUD_CONFIG may set
# MD_TRIES
# MD_DEBUG_COUNT

TMPF=/tmp/${0##*/}.tmp
trap "rm -f ${TMPF}" EXIT
msg() { echo "${XN}: $1"; }
mdget() {
	if [ "${2}" = "-" ]; then
		wget -q -O - "${MDURL}/${1}"
	else
		local out=${2:-${TMPF}}
		wget -q -O - "${MDURL}/${1}" > "${out}" &&
			{ read _RET < "${TMPF}" ; :; }
	fi
}
marked() {
	local name=${2:-${XN}} iid=${1}
	[ -f "${SEM_D}/${name}.${iid}" ]
}
mark() {
	local name=${2:-${XN}} iid=${1}
	{ [ -d "${SEM_D}" ] || mkdir "${SEM_D}"; } ||
		msg "failed to make ${SEM_D}"
	date > "${SEM_D}/${name}.${iid}"
}

mddebug() {
	local dbf="${STATE_D}/mddebug"
	if [ -f "${dbf}" ]; then
		chmod 755 "${dbf}"
		msg "running ${dbf} (${MD_DEBUG_COUNT} tries reached)"
		echo "############ debug start ##############"
		"${STATE_D}/debug"
		echo "############ debug end   ##############"
		return
	fi
	msg "running debug (${MD_DEBUG_COUNT} tries reached)"
	echo "############ debug start ##############"
	echo "### /etc/rc.d/init.d/sshd start"
	/etc/rc.d/init.d/sshd start
	local gw=""
	gw=$(route -n | awk '$1 == "0.0.0.0" && $2 != "0.0.0.0" { print $2 }')
	echo "### ifconfig -a"
	ifconfig -a
	echo "### route -n"
	route -n
	echo "### cat /etc/resolv.conf"
	cat /etc/resolv.conf
	if [ -n "${gw}" ]; then
		echo "### ping -c 5 ${gw}"
		ping -c 5 ${gw}
	else
		echo "### gateway not found"
	fi
	local t1 t2 t3 nslist="" ns=""
	while read t1 t2 t3; do
		case "$t1" in
			nameserver) nslist="${nslist} ${t2}";;
		esac
	done < /etc/resolv.conf
	echo "### pinging nameservers"
	for ns in ${nslist}; do
		echo "#### ping -c 5 ${ns}"
		ping -c 5 ${ns}
	done
	echo "### uname -a"
	uname -a
	lxc-is-container || { echo "### lsmod"; lsmod; }
	echo "### dmesg | tail"
	dmesg | tail
	echo "### tail -n 25 /var/log/messages"
	tail -n 25 /var/log/messages
	echo "############ debug end   ##############"
}

is_nocloud() {
	[ "${IS_NOCLOUD:-0}" != "0" ] && return 0
	lxc-is-container ||
		{ grep -q "ds=nocloud" /proc/cmdline && return 0; }
	[ -f /root/nocloud ] && return 0
	return 1
}