plan9fox/sys/src/9/boot/bootrc

# TODO
# settime
# handle rootspec
# handle rootdir
# clean rc environment before running init(8)
# kfs
# caching

rfork e
# boot methods
mlocal = (configlocal connectlocal)
mtcp = (configtcp connecttcp)
mtab = (mlocal mtcp)
config=1
connect=2

. /rc/lib/local.rc
. /rc/lib/tcp.rc

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=`{read}
	if(~ $#$1 0)
		$1=$3
	if(~ $"$1 '!rc'){
		rc -i
		$1=()
	}
	if(~ $#$1 0)
		ask $*
}

fn readmethod{
	found=0
	while(~ $found 0){
		if(~ $#nobootprompt 0){
			echo
			showlocaldevs
			ask bootargs ' are? (tcp, local!device)' $"bootargs
		}
		if not {
			bootargs=$nobootprompt
			nobootprompt=()
		}
		method=`{echo $bootargs | awk -F! '{print $1}'}
		NF=`{echo $bootargs | awk -F! '{print NF}'}
		for(i in `{seq 1 $#mtab}){
			if(~ $mtab($i) m^$method)
				found=$i 
		}
		if(~ $found 0)
			echo method $method not found
	}
	methodarg = `{echo $bootargs | awk -F! '{print $2}'}
	mp = $$mtab($found)
}

fn main{
	rm -f /srv/boot

	readmethod
	$mp($config) $methodarg

	switch($method){
	case local
		islocal=1
	case hybrid
		ishybrid=1
	}

	# authentication agent
	if(! test -f /srv/factotum){
		x=(/boot/factotum -sfactotum)
		if(~ $cpuflag 1)
			x=($x -kS)
		if not
			x=($x -u)
		if(! ~ $#authaddr 0)
			x=($x -a $authaddr)
		if(! ~ $#debugfactotum 0)
			x=($x -p)
		must $x
	}

	# connect to the root file system
	$mp($connect) $methodarg

	# mount root filesystem
	must mount -c /srv/boot /root

	# start pager
	if(test -x /dev/swap)
		echo -n start >/dev/swap

	# 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

	rootdir=/root

	if(~ $#init 0){
		init=/$cputype/init
		if(~ $cpuflag 1)
			init=($init -c)
		if not
			init=($init -t)
		# TODO handle mflag
	}
	exec $init
}

bind -q '#p' /proc

bind -qa '#S' /dev
bind -qa '#f' /dev
bind -qa '#k' /dev
bind -qa '#æ' /dev

if(test -e '#u'){
	bind -a '#u' /dev
	usb/usbd
	sleep 1
}

if(! ~ $#kbmap 0){
	bind -a '#κ' /dev
	if(test -r $"kbmap)
		cat $"kbmap >/dev/kbmap
}

configlocal	# add partitions and binds

while()@{
	rfork n
	main
}