#!/bin/rc

mntgen -s slash /mnt
bind /root /mnt/broot
unmount /root

bind -q '#p' /proc
for(i in S f k æ t b m)
	bind -qa '#'^$i /dev

# bind in an ip interface
for(i in I l^(0 1 2 3))
	bind -qa '#'$i /net

# usualy better than 1970
cat '#r/rtc' >/dev/time >[2]/dev/null

# reparse variables
for(i in `{ls -Qp /env}){
	switch($i){
	case '*'* 'fn#'* e820 apm0 apid ifs path pid prompt status ?
		# ignore these
	case *
		$i=`{echo $$i}
	}
}

fn sigint {
	status=interrupted
}

fn fatal {
	echo $*
	exit $"*
}

fn must {
	$* || fatal $"*^': '^$status
}

fn ask {
	echo -n $1
	echo -n $2
	if(! ~ $#3 0){
		echo -n '['
		echo -n $3
		echo -n '] '
	}
	$1=`{dd -bs 64 -count 1 >[2]/dev/null}
	if(~ $#$1 0)
		$1=$3
	if(~ $"$1 '!rc'){
		rc -i
		$1=()
	}
	if(~ $#$1 0)
		ask $*
}

mt=()

fn main{
	mp=()
	while(~ $#mp 0){
		if(~ $#nobootprompt 0){
			echo
			showlocaldevs
			ask bootargs ' is (tcp, il, local!device)' $"bootargs
		}
		if not bootargs=$nobootprompt
		nobootprompt=()
		mn=`{echo $bootargs | awk -F! '{print $1}'}
		ma=`{echo $bootargs | sed 's/[^!]*!?//'}
		switch(m$"mn){
		case $mt
			mp=m$mn
			mp=$$mp
		}
	}

	# config method
	$mp(1) $ma

	# authentication agent
	if(test -f /srv/factotum){
		rm -f /srv/factotum
		user=`{cat /dev/hostowner}
	}
	x=(/boot/factotum -sfactotum)
	if(~ $service cpu){
		x=($x -S)
		if(~ -k $ff)
			x=($x -k)
	}
	if not
		x=($x -u)
	if(! ~ $#auth 0)
		x=($x -a $auth)
	if(! ~ $#debugfactotum 0)
		x=($x -p)
	must $x

	# connect method
	$mp(2) $ma

	# insert cfs in the pipeline
	if(test -x /bin/cfs){
		if(~ $#bootdisk 1 && ~ $#cfs 0)
			cfs=$bootdisk/cache
		if(~ $#cfs 1 && ! ~ $cfs off && test -f $cfs){
			x=(/bin/cfs -s -f $cfs)
			if(~ -f $ff)
				x=($x -r)
			{$x </srv/boot &} | echo 0 >/srv/cfs
			rm /srv/boot
			mv /srv/cfs /srv/boot
		}
	}

	# mount and change root in new enviroment and namespace
	rfork ne

	# mount root filesystem
	if(~ $#rootdir 0)
		rootdir=/root
	must mount -c /srv/boot $rootdir

	# compile init command
	if(~ $#init 0){
		init=/$cputype/init
		if(~ $service cpu)
			init=($init -c)
		if not
			init=($init -t)
		if(~ -m $ff)
			init=($init -m)
	}

	# remove enviroment variables
	rm -f /env/^$mt /env/? /env/?? '/env/fn#'* 

	# remove part of our temporary root
	/mnt/broot/$cputype/bin/unmount /$cputype/bin /bin
	/mnt/broot/$cputype/bin/unmount /rc/bin /bin
	/mnt/broot/$cputype/bin/unmount /

	# create the name space, mount the root fs
	/mnt/broot/$cputype/bin/bind / /
	/mnt/broot/$cputype/bin/mount -ac '#s/boot' /

	# remove the remaining temporary root
	/mnt/broot/$cputype/bin/unmount /mnt/broot

	exec $init
}

# keyboard and serial console
if(test -x /bin/aux/kbdfs){
	a=$console(1)
	if(! ~ $#a 0)
		a=/dev/eia^$a
	aux/kbdfs -q -s cons $a
}

# usb devices
if(test -x /bin/nusbrc && ! test -e /env/nousbrc)
	nusbrc

# wait for devices to settle down
if(~ $#usbwait 1)
	sleep $usbwait
if(~ $#usbwait 0)
	sleep 2

. /rc/lib/net.rc
. /rc/lib/local.rc

# add partitions and binds
configlocal

# boot(8) command line arguments
ff=()
aa=()
while(! ~ $#* 0){
	if(~ $1 -*){
		if(~ $1 -u*){
			if(~ $1 -u){
				user=$2
				shift
			}
			if not {
				user=`{echo $1 | sed 's,^-u,,g'}
			}
		}
		if not {
			if(~ $1 -*f*)
				ff=($ff -f)
			if(~ $1 -*k*)
				ff=($ff -k)
			if(~ $1 -*m*)
				ff=($ff -m)
		}
		shift
	}
	if not {
		while(! ~ $#* 0){
			aa=($aa $1)
			shift
		}
	}
}
if(! ~ $#aa 0 && ~ $#bootargs 0 && ~ $#nobootprompt 0){
	bootargs=$aa
	nobootprompt=$aa
}

while(){
	@{main}

	# subshell doesnt wait on interrupts
	while(~ $status interrupted){wait}

	# cleanup so it can be restarted
	nobootprompt=()
	rm -f /srv/^(cfs boot slashn cs dns)
} </dev/cons