From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <8ba2d4c68bc57cff06a1d25a83434ca2@collyer.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] halting fossil (patch wannabe)
From: Geoff Collyer <geoff@collyer.net>
In-Reply-To: <e09bbd3f495c5b5efe652292fbec46d3@plan9.ucalgary.ca>
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Date: Mon,  3 Nov 2003 15:06:06 -0800
Topicbox-Message-UUID: 7e734dfa-eacc-11e9-9e20-41e7f4b1d025

I have a more ambitious halt command that shuts down fossil and venti
and syncs kfs.  It helps that I'm running off of Ken's fs, otherwise
one would want to rearrange the order of things to shutdown the
service that serves the main file system last.


#!/bin/rc
# halt - sync (flush) and, if possible, halt all file servers
rfork e

cd /

# fossil first, since it lives on venti.
# fossil is damned hard to shut down cleanly and
# without losing blocks.
f=/srv/fscons
if (test -e $f) {
	echo -n 'fossil (takes a while)...'
	for (n in `{seq 1 3}) {
		echo -n sync...
		echo fsys main sync >>$f # must be >>
		sleep 3
	}
	echo -n sync...
	echo fsys main sync >>$f	# must be >>
	echo halt
	echo fsys main halt >>$f	# must be >>
}

# venti next, since it may live on kfs
echo -n venti...
venti/sync		# upon return, sync is done, not just started

kfs = `{ls /srv/kfs*.cmd >[2]/dev/null}
if (! ~ $#kfs 0) {
	echo -n kfs sync...
	disk/ksync
	sleep 2

	kfs = `{ls /srv/kfs.*.cmd >[2]/dev/null}
	if (! ~ $#kfs 0) {
		echo -n aux. kfs halt...
		for (i in $kfs)
			disk/kfscmd -n `{echo $i |
				sed 's%/srv/kfs.(.*).cmd%\1%'} halt
	}
	if (test -r /srv/kfs.cmd) {
		echo main kfs halt...
		disk/kfscmd halt
		sleep 2
	}
}