#!/bin/rc
# fshalt [-r] - sync (flush) and, if possible, halt all file servers
#	and optionally reboot
rfork en
reboot=no
scram=no
while (~ $1 -*){
	switch($1){
	case -r
		reboot=yes
		shift
	case -n
		scram=noscram
		shift
	case *
		echo usage: $0 '[-r] [-n]' >[1=2]
		exit usage
	}
}

path=(/bin)
builtin cd /
bind -c '#s' /srv
bind '#p' /proc

unmount /mnt/consoles >[2]/dev/null
kill consolefs | rc			# don't compete with /mnt/consoles
sleep 1

c=`{ls /srv/cwfs*cmd >[2]/dev/null}
h=`{ls /srv/hjfs*cmd >[2]/dev/null}
f=`{ls /srv/fscons* >[2]/dev/null}

# for scram, don't scram other systems
if(! ~ $scram noscram){
	bind -b '#P' /dev
	if(! ~ $reboot yes){
		if (test -e '#P'/apm)
			scram=yes
		if (test -e '#P'/acpitbls -a -e '#P'/iow)
			scram=yes
	}
}

for(i in $f){
	echo -n $i
	venti/sync -h localhost >[2]/dev/null &
	venti/sync  >[2]/dev/null &
	sleep 2
	echo -n '...sync...'
	{
		echo
		echo 'fsys all sync'
		sleep 4
	} < $i >> $i
	venti/sync -h localhost >[2]/dev/null &
	venti/sync  >[2]/dev/null &
	sleep 2
}

# halting (binaries we run can't be on the fs we're halting)
ramfs
builtin cd /tmp
cp /bin/echo /tmp
mkdir /tmp/lib
cp /rc/lib/rcmain /tmp/lib
cp /bin/ns /tmp
cp /bin/rc /tmp
cp /bin/sed /tmp
cp /bin/sleep /tmp
cp /bin/scram /tmp
cp /bin/test /tmp
bind /tmp /rc
bind /tmp /bin

# put this in a shell function so this rc script doesn't get read
# when it's no longer accessible
fn x {
	echo
	echo -n halting...
	for (i in $c $h)
		echo halt >>$i
	for (i in $c $h){
		echo -n $i...
		while(test -e $i)
			sleep 1
	}
	for(i in $f){
		echo fsys all halt >>$i
		sleep 3
	}
	echo
	echo done halting

	if (~ $reboot yes) {
		echo rebooting...
		echo reboot >'#c/reboot'
	}
	if (~ $scram yes){
		scram
		echo 'It''s now safe to turn off your computer'
	}
}

x