plan9fox/rc/bin/fshalt

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

k=`{ls /srv/kfs*cmd >[2]/dev/null|sort -r}
c=`{ls /srv/cwfs*cmd >[2]/dev/null}

for (i in $k){
	echo -n $i... 
	switch($i){
	case /srv/kfs.cmd
		disk/kfscmd sync
	case *
		disk/kfscmd -n `{echo $i | sed -n 's%/srv/kfs.(.*).cmd%\1%p'} sync
	}
	sleep 2
}

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

# halting (binaries we run can't be on the fs we're halting)
ramfs
builtin cd /tmp
cp /bin/dial/expect /tmp
cp /bin/disk/kfscmd /tmp
cp /bin/echo /tmp
cp /bin/iostats /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
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 $k){
		echo -n $i... 
		switch($i){
		case /srv/kfs.cmd
			kfscmd halt
		case *
			kfscmd -n `{echo $i | sed -n 's%/srv/kfs.(.*).cmd%\1%p'} halt
		}
	}
	for (i in $c){
		echo -n $i...
		echo halt >>$i
		sleep 2
	}
	echo
	echo done halting

	if (~ $reboot yes) {
		echo rebooting...
		echo reboot >'#c/reboot'
	}
	if (~ $scram yes)
		scram
}

x