#!/bin/sh

exec_if_executable()

{

	local f

	f="$1"

	shift

	[ -x "$f" ] && "$f" "$@"

}

mdadm_found()

{

	[ -s /etc/mdadm.conf ] || return 1

	local f

	for f in /sbin/mdadm /usr/sbin/mdadm /sbin/mdassemble /usr/sbin/mdassemble; do

		[ -x "$f" ] && return 0

	done

	return 1

}

raidtools_found()

{

	[ -s /etc/raidtab ] || return 1

	local f

	for f in /sbin/raidstart /sbin/raid0run /sbin/raidadd; do

		[ -x "$f" ] && return 0

	done

	return 1

}

start_raid_using_mdadm()

{

	[ -s /etc/mdadm.conf ] || return 1

	local f

	for f in /sbin/mdadm /usr/sbin/mdadm; do

		[ -x "$f" ] || continue

		echo -n "(using mdadm) "

		"$f" --assemble --scan

		return $?

	done

	for f in /sbin/mdassemble /usr/sbin/mdassemble; do

		[ -x "$f" ] || continue

		echo -n "(using mdassemble) "

		"$f"

		return $?

	done

	return 1

}

start_raid_using_raidtools()

{

	[ -s /etc/raidtab ] || return 1

	local rc=0 i dev stat res

	echo -n "(using raidtools) "

	for i in `grep -s "^raiddev" /etc/raidtab | awk '{print $2}'`; do

		dev="${i##*/}"

		stat=`grep -s "^$dev : active" /proc/mdstat`

		if [ -z "$stat" ]; then

			# Try raidstart first...if that fails then

			# fall back to raidadd, raidrun.  If that

			# also fails, then we drop to a shell

			res=1

			exec_if_executable /sbin/raidstart "$i"

			res=$?

			if [ $res -gt 0 ]; then

				exec_if_executable /sbin/raid0run "$i"

				res=$?

			fi

			if [ $res -gt 0 ]; then

				exec_if_executable /sbin/raidadd "$i"

				exec_if_executable /sbin/raidrun "$i"

				res=$?

			fi

			if [ $res -gt 0 ]; then

				rc=1

			fi

		fi

		echo -n "$dev "

	done

	return $rc

}

[ -f /proc/mdstat ] && ! grep -iwqs noraidtab /proc/cmdline || exit 0

rc=0

if mdadm_found; then

	echo -n "Starting up RAID devices: "

	start_raid_using_mdadm

	rc=$?

	echo

elif raidtools_found; then

	echo -n "Starting up RAID devices: "

	start_raid_using_raidtools

	rc=$?

	echo

fi

exit $rc