Porting Perl+curses to Solaris

While porting a Curses app to Solaris (u6) the other day, I ran into a problem with the Curses::UI library. MakeMaker couldn't find the use_default_colors() function (which should be there somewhere) in the installed ncurses library headers, which Curses::UI uses by default.

It would seem that passing Curses::UI->new() an arg for -default_colors => 0 will make the library not call the use_default_colors() function, which should avoid the error. Apparently this isn't the case; I had to create my GUI with compatibility mode by using -compat => 1.

Additionally, my ncurses installation doesn't support the KEY_RESIZE constant. Fixing this was a simple tweak to the code to ignore it (the library ignores the key anyway, so it's not like I'm losing any functionality to it).

index 9ab97ae..3b39d89 100644
--- a/lib/solaris/Curses/UI.pm
+++ b/lib/solaris/Curses/UI.pm
@@ -383,9 +383,9 @@ sub do_one_event(;$)
     # ncurses sends KEY_RESIZE() key on resize. Ignore this key.
     # TODO: Try to redraw and layout everything anew
     # KEY_RESIZE doesn't seem to work right;
-    if (Curses->can("KEY_RESIZE")) {
-        $key = '-1' if $key eq KEY_RESIZE();
-    }
+#    if (Curses->can("KEY_RESIZE")) {
+#        $key = '-1' if $key eq KEY_RESIZE();
+#    }
     my ($cols,$lines) = GetTerminalSize;
     if ( ($ENV{COLS} != $cols) || ( $ENV{LINES} != $lines )) {
        $self->layout();

A quick wrapper around the original to do OS detection and pick the Curses::UI library at runtime from it, and I now have an app that'll run in curses mode on both Linux and Solaris.

:wq

IRC Wars: weechat vs irssi

The other week, I switched from irssi to weechat for my console IRC client of choice. The box these run on is a FreeBSD 6.2 system, so getting everything working like I wanted with weechat was a bit of a chore.

weechat comes with a couple improvements over vanilla irssi. First, the nicklist "plugin" from irssi is included by default. I thought this was a cool feature the few times that I've seen it used on people's clients, but didn't really realize how much it helps until I started using weechat. I don't think I've done a /names in a week.

Secondly, color support is vastly improved. /set reveals a whole slew of color and styling options, without having to muck around with a separate style config and the correct magic incantations of /save, /load, and /savestyle.

Finally, weechat has a much richer filtering interface. The IRC smart filter automatically collapses people who flap into a single set of join/part messages. It also keeps the text that it actually received, so unlike irssi, you can get the data back after filtering it out.

Now, onto compiling...

I would much rather have used the port of weechat than compile my own version, but that's only 0.2.6 (current is 0.3.0), and running old versions is somewhat suboptimal.

One of the main issues was that weechat has multiple front-ends and the configure script failed to find any of them (the box is headless, so no surprises about missing gtk+/qt libs). I'm only interested in the ncurses front-end, but the default ncurses library on the system doesn't work with wide-characters. Linux-compatibility ncurses does, but only has the lib and not the headers. For most users, this probably isn't a problem, but since I use IRC in languages other than English (specifically, Japanese without wide-characters is painful), it's a must. I actually had my irssi session around still just for this.

So, I had to compile my own ncurses library (--with-widec --with-ext-colors). Unfortunately, weechat only picks up on the wide characters and doesn't have 256-color support. Not really a big deal, but I like my shinies when I can get them. Ncurses 5.7 compiled like a charm the first time, and getting weechat to recognize the new lib is just a matter of correcting CFLAGS.

Now I'm off and running full time with weechat. I guess if irssi is the client of the future, the present isn't doing too shabby, either.

:wq

Browser Wars, Part 1 of ?

After Firefox 3.5 crashed for the 10th time in an hour or something like that, I finally cracked down and started on getting uzbl (pronounced "usable") working.

Install and launch uzbl, and you're likely to not see how nifty this little browser is. There's no title bar, no navigation, no keybindings; you get a blank white screen. What's the big deal? I can do that in something like 20 lines of c using the OpenGL library (it's a 3-D white screen, even).

The first thing to realize is that there is no default configuration. If you want to go to a page, you must launch the program with something like: `uzbl --uri www.uzbl.org`. Now, this isn't very usable, since you have to open a new browser every time you want to go to a new url (like I used to do in lynx before I found the 'g' command).

Thankfully, there is a very easy way to get a basic configuration. If you're used to vimperator (and you should be, if you still use Firefox), then you'll be all set by copying the sample configuration (likely under /usr/share/uzbl/examples) into your XDG_*_HOME locations. The color scheme is a bit ugly, but it gets the basic information across, and you can use all your favorite vim keybindings, except the ones that are bound incorrectly. I reconfigured mine so that top of page is gg, and bottom of page is G, instead of the defaults of << and >>, for instance. If I could indent and dedent text on the fly, those would be the commands for that.

The biggest difference between the uzbl and vimperator keybindings, however, is that uzbl starts in command mode, not insert mode. I've typed my username into the command bar dozens of times already, because I'm used to clicking in a text field and having it steal my input focus. Not so with uzbl! You must hit i to go to insert mode, just like in a real editor. I hear there are ways to make uzbl perform like emacs, but matters of religion aside, it's not that hard to get used to vim-like behavior.

Since uzbl subscribes to the UNIX philosophy, there's also no notion of tabs. This makes it very amenable to being embedded into gtk+ applications, since those can either implement tabbed browsing or not as appropriate. This is a little reminescent of the Microsoft way, with IE browsing-only windows able to be embedded into anything. You know, if you like having all your apps that want to render HTML be vulnerable to .NET-based attacks or something.

In order to get tabbed browsing, there is a Python wrapper called uzbl_tabbed.py to implement it. The source is pretty straightforward; it opens a new uzbl process every time you create a new tab. This can be a great way to test your configuration, since new tabs use the latest configuration, and old tabs stay the same. Of course, if you blow up uzbl_tabbed impressively enough, it won't clear out the fifos and sockets in /tmp and you'll be left with a problem resembling Firefox's "already opened" message. Except with no error message, unless you start uzbl_tabbed.py from a terminal. For me, CADIE is just about perfect for this.

Having now figured out tabbed browsing and how to make the keyboard bindings more sane, I figured the only thing that I needed to keep Firefox around for was flash. Every once in a while, there's a purpose for it, like my bank's online banking login. They still have a "deprecated" HTML version, but I'm not about to be caught locked out with a check waiting to bounce if I can avoid it. To my great surprise, uzbl supported flash right out of the box. I don't know if this is just because of my distro's package, or if it's actually in the version of webkit that uzbl is built on or what, but it means I can do online banking, and the occasional youtube video. Oh, those silly, silly people shaking babies...

So far uzbl can do everything I use Firefox for. What could there possibly be that's bad?

No (or very limited) incremental rendering. This means that clicking on a link sometimes offers absolutely no immediate feedback that something is happening. But, one of the mottos of UNIX tools is that "no news is good news." Unfortunately, the internet being what it is, this is more like a GNU tool where no news is, well, no news. Pages eventually do load, but seem to take forever, since the entire page has to load and render before anything shows up. Since it doesn't clear the old page until the new one is ready, it's easy to click a link a few times without realizing that uzbl is trying to get the page for you.

Downloading files is a little weird. GTK+ already has support for downloading files, so why build it into uzbl? This makes a lot of sense, as it makes the browser more lightweight and doesn't duplicate functionality, but even w3m has a download manager.

uzbl uses webkit. I really don't like webkit as much as Gecko; it isn't as widely-recognized as a "real" rendering engine, so sites aren't designed or tested with webkit browsers. Maybe the iPhone and Chrome are changing this, but Safari seems to have done very little to be taken seriously, so it's an uphill climb. On the other hand, at least it's not IE.

(editor's note: wow, was I right about Chrome making webkit a standard browser)

uzbl_tabbed is pretty bare-bones. Tabs aren't shortened when there isn't enough room; there's just an ellipsis to show that more tabs exist. How many more? Good question. What tabs are over there past number 3? An equally good question. I'm sure this can be fixed by hacking on the script a little, but I haven't started on that yet. There is an option for gtk+ styled tabs, which is (thankfully) turned off by default. I'm guessing that the gtk+ notebook tabs handle this much more sanely than the text tabs. Of course, they also take up more screen real estate, and I've only got 600px from top to bottom.

Bookmarks. What are those? uzbl has no concept of a bookmark. There are scripts to implement this functionality, but one of the coolest extensions I use for Firefox is Xmarks (formerly FoxMarks, formerly Google Browser Sync). Automagically, I can bookmark a page on a computer at school and it shows up on my laptop. Delete a bookmark on my laptop and it's gone from the systems at work. UNIX Firefox doesn't show it; Linux Firefox doesn't show it; Windows Firefox doesn't show it. Pretty freakin' cool. Setting the same thing up in uzbl will likely require rsync and cron and a few hours of mucking with scripts. Or learning git.

Japanese text. This is really an issue I have with gtk+ in general. Kanji are roughly half again as large as kana and extend above and below the baseline. WHY?!? It's nice that this makes the kanji bigger and therefore a little easier to read (pack 29 strokes into 16px high and it's more a Rorschach Test than reading), but it looks like a little kid's handwriting with letters all different heights. Or, since they're printed, maybe like a ransom note cut out of magazines. "If you ever want to see all your characters the same height again..."

All in all, uzbl is pretty neat so far. I dislike being dependent on Python in general (run a Python 2.4 script in a 2.6 interpreter to see why), so instead of hacking on the tabbed browsing script, I may just write my own. Then again, that would mean I'd have to restart my uzbl session, and that's been going for longer than I've gotten out of Firefox since upgrading. Plus, Firefox seems to have amnesia lately and won't restore my tabs from last time, except when it crashes (which, yes, is embarrasing, but leave the witty commentary to Chrome).

If I ever get Chromium working on Linux (I haven't tried in months, so it could be a fun project for next weekend), expect Browser Wars to continue for some time; with more than just Firefox and lynx, I actually get a choice now for my Linux browser. It's about time we caught up to Windows on this one.

:wq

SSH over LPR

A couple weeks ago, somebody asked if it were possible to get printers from school to work through a local cups client (ala, just putting the print server in client.conf). Some google-fu landed me this script for making a cups backend that prints via ssh. Of course, like most things on the intarwebs, it almost does what I wanted it to do.

A little tweaking and I got the script to run on my laptop, using ssh-agent so that I don't have to have passwordless root keys in order to print anywhere (still need them for my fuse-sshfs/autofs hack, though). Since archlinux runs cups as daemon instead of root, the script needs an suid wrapper in order to work properly (daemon can't su to $user).

The instructions are basically the same as for the original script. Install (or install suid wrapper) to /usr/lib/cups/backend . Then restart cups and add the printer. Cups will not show the remote and local users, but they are stored and will work correctly.

Exit codes can be modified to make the "printer" respond differently based on various conditions. For example, `exit 3` causes the queue to be stopped if the print server is not responding.

#!/bin/sh

# SSH-LPR Backend

# The purpose of the back end is to send print jobs to a remote system
# through ssh and lpr on the remote side. It requires that the user who
# wishes to print have a key-based authentication set up for the server in
# question. The printer URI is sshlpr://[ruser[:luser]@]server/queue where
# ruser is the name of remote user if it is different from the local use
# name, luser is the local user account with the SSH key, if different
# from the user who actually printed, server is the host and queue is the
# print queue name as it would get passed to lpr -P queue.

# With no parameters, we need to tell CUPS what we are.
if [ $# -le 0 ]
then
        echo "network sshlpr \"Unknown\" \"LPR thorugh SSH\""
        exit 0
fi

HOME='/root'
export HOME

# If we get the correct number of arguments, as per:
#       $1=job-id $2=user $3=title $4=copies $5=options $6=[file]
[ $# -lt 5 -o $# -gt 6 ] && exit 1

# Parse URL
user=$2
localuser=$2

[ -z "$DEVICE_URI" ] && exit 1

server="`echo $DEVICE_URI | cut -f 3 -d /`"
printer="`echo $DEVICE_URI | cut -f 4 -d /`"
if echo $server | grep '@' > /dev/null 2> /dev/null
then
        user="`echo $server | cut -f 1 -d '@' `"
        server="`echo $server | cut -f 2 -d '@' `"
fi

if echo $user | grep ':' > /dev/null 2> /dev/null
then
        localuser="`echo $user | cut -f 1 -d ':' `"
        user="`echo $user | cut -f 2 -d ':' `"
fi

# sanitize input for title
title=`echo $3 | sed -e "s/'//g" -e 's/"//g'`

# find a running SSH_AGENT
for i in /tmp/ssh-*/agent.* ; do
        if [ -r $i ] ; then
                ssh_auth_old=$SSH_AUTH_SOCK
                SSH_AUTH_SOCK=$i
                export SSH_AUTH_SOCK
                lines=`ssh-add -l | wc -l`
                if [ $lines -eq 0 ] ; then
                        SSH_AUTH_SOCK=$ssh_auth_old
                        export SSH_AUTH_SOCK
                fi
        fi
done

echo "Using SSH_AUTH_SOCK of $SSH_AUTH_SOCK" >&2

LPR="/usr/bin/lpr -U ${user} -P ${printer} -J '${title}' -# $4"

/bin/ping -c 1 -W 1 $server >/dev/null 2>&1
if [ $? -ne 0 ] ; then
        echo "Host is down: $server"
        exit 3
fi

echo "Doing cat $6 | su $localuser -c \"ssh $user@$server \\\"$LPR\\\"\"" >&2

# Has CUPS given us a file in $6?
if [ -r "$6" ] ; then
        /bin/cat $6 | su $localuser -c "/usr/bin/ssh -q -o BatchMode=yes ${user}@${server} \"${LPR}\""
        if [ $? -eq 0 ] ; then exit 0; fi
        exit 3
else
        echo "Cannot read file: $6" >&2
        exit 2
fi

:wq

@ IN SOA localdomain. aaron.localdomain.

So, I finally got my networking set up at home a couple months ago. There's a little web interface to add computers to the network, which automatically updates DHCP and DNS and allows them on wireless.

I also have an IPv6 tunnel and auto-configuration for my /48 (rDNS is annoyingly difficult, thanks to comcast).

So, of course, this weekend I got to break it all!

I've been using dnsmasq on my linux server to do DHCP and DNS. Basically, it looks through /etc/hosts and /etc/ethers and figures out the answers to queries from there. It also has support for built-in TFTP and can send the right options to be able to PXE boot computers. Neat.

But, my router is running FreeBSD, and I want to reload my linux box to OpenSolaris. The linux machine is basically a fileserver, so reloading it means I can use ZFS. Here's the overall plan:

1. reload fileserver
2. ???
3. profit

Step 1 requires that I move the infrastructure (DHCP, DNS, TFTP, etc.) onto the router, which I've been meaning to do anyway. I've got linux compatibility mode turned on on the router, so I could probably run dnsmasq on there, but that's not very impressive. Bind9 and ISC dhcpd is a much cooler option.

Enter `svn branch`.

Today, I spent my time rewriting my networking automagic (the scripts, not the daemon) to generate DNS zone files from my networking database. Of course, the cron will still run on the db server, since I don't want to be firing up make and perl on the router every 5 minutes. Sure, I could, but the db would be hella slow. Now I've got DNS running on 2 boxes, and as soon as I figure out all the merging and branching and moving to make it work correctly, I'll be able to shut down the DNS server on linux.

DHCP will, of course, require me to learn yet another config file format, but it looks similar, and I should just have to tweak the scripts a little bit to make them output the new format. The only hard part of dnsmasq -> named was the conversion from /etc/hosts to the IPv6 PTR records. About 30 lines of perl run through the whole shooting match for that; IPv4 is just an extra sed script.

:wq

ZFS over iSCSI over ZFS

Some stuff I was hacking away on at work today; this is mostly a note to self:

The tl;dr version:

1. double-check commands you type when playing with disks
2. triple-check commands you type when playing with disks
3. see #1 and #2
4. the way to "refresh" the list of iscsi targets on the initiator is `iscsiadm modify discovery -t enable` (yes, I already had it enabled; it works anyway)
5. it's `zpool iostat [pool] [interval]`, not `zpool iostat [interval] [pool]`

So...I set out to find out what happens when we resize a disk that's shared out over iSCSI.

And, just for my own sanity that this will work with real data, I copied over some D&D stuff to the client:

> time find dnd -type f -exec cat {} \; | md5sum
b5f1fc52d09baaf9f3db34408ce9c184  -

real    4m6.008s

I started with a mirror of 2 disks, cleverly named foo and bar, both 10G. Resizing bar to 15G caused the initiator to disconnect, and the pool faulted. Then I removed the faulty disk and added the new one in, and viola! 25G of space instead of my 9G mirror.

...crap; I wanted to mirror that. Backing out changes is a PITA, so I'll create a new disk (cleverly named zot) to be a mirror of foo during the upgrade to 15G.

Before adding zot (removed the targets that I'm not playing with):

fileserver:~# iscsitadm list target
Target: idle/robin/foo
    iSCSI Name: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
    Connections: 1
Target: idle/robin/bar
    iSCSI Name: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
    Connections: 1



client:/# iscsiadm list target
Target: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
        Alias: idle/robin/bar
        TPGT: 1
        ISID: 4000002a0000
        Connections: 0
Target: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
        Alias: idle/robin/foo
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1

um...this is odd, since bar is part of my zpool on the client.

And then I added the new zfs iSCSI target on the fileserver:
mkiscitarget.sh is a wrapper around all the steps:

1. zfs create -s -V ${SIZE} ${TARGET}
2. (optional) iscsitadm modify -l ${INITIATOR} ${TARGET}
3. (optional) iscsitadm modify -p ${TPGT} ${TARGET}

fileserver:~# ./mkiscsitarget.sh idle/robin/zot 10G client 208
fileserver:~# iscsitadm list target
Target: idle/robin/foo
    iSCSI Name: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
    Connections: 1
Target: idle/robin/bar
    iSCSI Name: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
    Connections: 1
Target: idle/robin/zot
    iSCSI Name: iqn.1986-03.com.sun:02:e0fe1c0d-634e-e96e-f8ad-dbc3c304a6e5
    Connections: 1



client:/# iscsiadm modify discovery -t enable
client:/# iscsiadm list target
Target: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
        Alias: idle/robin/foo
        TPGT: 208
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
        Alias: idle/robin/bar
        TPGT: 208
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:e0fe1c0d-634e-e96e-f8ad-dbc3c304a6e5
        Alias: idle/robin/zot
        TPGT: 208
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
        Alias: idle/robin/bar
        TPGT: 1
        ISID: 4000002a0000
        Connections: 0
Target: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
        Alias: idle/robin/foo
        TPGT: 1
        ISID: 4000002a0000
        Connections: 0
client:/# format
Searching for disks...done

c1t010000144FF2985500002A004A31B8A6d0: configured with capacity of 10.00GB


AVAILABLE DISK SELECTIONS:
       0. c0t0d0 
          /pci@1f,0/ide@d/dad@0,0
       1. c1t010000144FF2985500002A004A31A1F7d0 
          /scsi_vhci/ssd@g010000144ff2985500002a004a31a1f7
       2. c1t010000144FF2985500002A004A31B8A6d0 
          /scsi_vhci/ssd@g010000144ff2985500002a004a31b8a6
       3. c1t010000144FF2985500002A004A304D18d0 
          /scsi_vhci/ssd@g010000144ff2985500002a004a304d18
Specify disk (enter its number): ^C

an aside: Ben Rockwood used ^D to get out of format in an article I ran across. Since that works, it would stand to reason that `format <&-` would work in bash; so much for reason. `format </dev/null` or `echo | format` work fine, but who wants to type all that?</aside>

Oh...and I changed the tpgt for zot, bar, and foo - 208 is the box's nge0; 1 is actually tpgt 0 on the targets, but it comes across to the initiator as 1; no idea why that is. Evidently, iscsiadm has decided the disks are different (despite matching GUIDs) because the TPGT entries are different.

That's just silly; I'll move them back so it sees its targets again. Besides, my `zpool status` on the client is hanging and unkillable, so maybe the disk is gone and solaris hasn't quite figured it out (40min seek time? sure, that makes sense).

fileserver:~# iscsitadm delete target -p 208 idle/robin/foo
fileserver:~# iscsitadm delete target -p 208 idle/robin/bar


client:/# iscsiadm modify discovery -t enable
client:/# iscsiadm list target
Target: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
        Alias: idle/robin/foo
        TPGT: 208
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
        Alias: idle/robin/bar
        TPGT: 208
        ISID: 4000002a0000
        Connections: 0
Target: iqn.1986-03.com.sun:02:e0fe1c0d-634e-e96e-f8ad-dbc3c304a6e5
        Alias: idle/robin/zot
        TPGT: 208
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
        Alias: idle/robin/bar
        TPGT: 1
        ISID: 4000002a0000
        Connections: 1
Target: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
        Alias: idle/robin/foo
        TPGT: 1
        ISID: 4000002a0000
        Connections: 0

wait...what?!? I tried moving foo back to 208, since that's where the client says it's connected to the disk, but nothing changed. Time to turn off the iSCSI sharing and see if ZFS can figure it out when things come back.

fileserver:~# zfs set shareiscsi=off idle/robin/foo
fileserver:~# zfs set shareiscsi=off idle/robin/bar
fileserver:~# zfs set shareiscsi=off idle/robin/zot
fileserver:~# iscsitadm list target
fileserver:~#



client:/# iscsiadm modify discovery -t enable
client:/# iscsiadm list target
Target: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
        Alias: idle/robin/foo
        TPGT: 208
        ISID: 4000002a0000
        Connections: 0
Target: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
        Alias: idle/robin/bar
        TPGT: 208
        ISID: 4000002a0000
        Connections: 0
Target: iqn.1986-03.com.sun:02:e0fe1c0d-634e-e96e-f8ad-dbc3c304a6e5
        Alias: idle/robin/zot
        TPGT: 208
        ISID: 4000002a0000
        Connections: 0
Target: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
        Alias: idle/robin/bar
        TPGT: 1
        ISID: 4000002a0000
        Connections: 0
Target: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
        Alias: idle/robin/foo
        TPGT: 1
        ISID: 4000002a0000
        Connections: 0
client:/# iscsiadm modify discovery -t disable
iscsiadm: logical unit in use
iscsiadm: Unable to complete operation

Weird; and the file system is still mounted. But I can't `zpool status` (going on an hour now), so it shouldn't still work, right?

> ls dnd/
2e                                   cerat
3.5e                                 dX_skills.ods
4e                                   dnd
...

Yes, I know I have a dnd/dnd; I really need to clean it up.

Okay...looks like things are still hosed; time to pull the plug on the processes:

client:/# kill 726 2531 17260
client:/# kill -9 726 2531 17260
client:/# kill -CONT 726 2531 17260
client:/# for i in `/pkgs/gnu/bin/seq 1 48`; do kill -$i 726 2531 17260; done
client:/#

Now, the box is just mocking me...I think this is why the default is to panic in such a situation.

Sharing all the stuff back out to client so it can come up "clean":

fileserver:~# zfs set shareiscsi=on idle/robin/foo
fileserver:~# iscsitadm modify target -l xitomatl idle/robin/foo
fileserver:~# iscsitadm modify target -p 208 idle/robin/foo

... ditto for bar and zot ...

fileserver:~# iscsitadm list target
Target: idle/robin/foo
    iSCSI Name: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
    Connections: 0
Target: idle/robin/bar
    iSCSI Name: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
    Connections: 0
Target: idle/robin/zot
    iSCSI Name: iqn.1986-03.com.sun:02:e0fe1c0d-634e-e96e-f8ad-dbc3c304a6e5
    Connections: 0
client:/# reboot
Connection to client closed by remote host.
Connection to client closed.

fileserver:~# iscsitadm list target
Target: idle/robin/foo
    iSCSI Name: iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6
    Connections: 1
Target: idle/robin/bar
    iSCSI Name: iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c
    Connections: 1
Target: idle/robin/zot
    iSCSI Name: iqn.1986-03.com.sun:02:e0fe1c0d-634e-e96e-f8ad-dbc3c304a6e5
    Connections: 1

Yes, it connected just after I told it to reboot and SSH kicked me out.

And, back to the client, now sitting at a white screen of unlife:

stop+a
Type 'go' to resume
> boot

On reboot:

NOTICE: iscsi session(12) iqn.1986-03.com.sun:02:0fb34688-bd5c-6f54-ba25-ca3d972187f6 online
NOTICE: iscsi session(9) iqn.1986-03.com.sun:02:2e83e95d-3841-44d7-c97c-c8de9fe7629c online
NOTICE: iscsi session(6) iqn.1986-03.com.sun:02:e0fe1c0d-634e-e96e-f8ad-dbc3c304a6e5 online

You'll notice these are the iqn's for foo, bar, and zot, respectively. After cde-login comes up, the box helpfully tells me that my pool has faulted.

After logging in and running a `zpool status`, it says that bar is offline. Waiting a little makes bar come back. Weird, but at least it recovered. It's not a mirror, but I still only seem to have 10G out of my 2 10G disks. I hate using the Windows approach in UNIX, though.

client:/# zpool status trump
  pool: trump
 state: ONLINE
 scrub: none requested
config:

        NAME                                     STATE     READ WRITE CKSUM
        trump                                    ONLINE       0     0     0
          c1t010000144FF2985500002A004A31A1F7d0  ONLINE       0     0     0
          c1t010000144FF2985500002A004A304D18d0  ONLINE       0     0     0

errors: No known data errors
client:/# format </dev/null
Searching for disks...done

c1t010000144FF2985500002A004A31B8A6d0: configured with capacity of 10.00GB


AVAILABLE DISK SELECTIONS:
       0. c0t0d0 
          /pci@1f,0/ide@d/dad@0,0
       1. c1t010000144FF2985500002A004A31A1F7d0 
          /scsi_vhci/ssd@g010000144ff2985500002a004a31a1f7
       2. c1t010000144FF2985500002A004A31B8A6d0 
          /scsi_vhci/ssd@g010000144ff2985500002a004a31b8a6
       3. c1t010000144FF2985500002A004A304D18d0 
          /scsi_vhci/ssd@g010000144ff2985500002a004a304d18
Specify disk (enter its number):
client:/# zfs list trump
NAME    USED  AVAIL  REFER  MOUNTPOINT
trump  1.59G  8.19G  1.59G  /disk/trump
client:/# zpool iostat trump 30
               capacity     operations    bandwidth
pool         used  avail   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
trump       1.59G  23.2G     13      0  1.59M      0

Weird...looks like it still thinks the devices are 10G and 15G.

fileserver:~# zfs get volsize idle/robin/foo
NAME            PROPERTY  VALUE           SOURCE
idle/robin/foo  volsize   10G             -
fileserver:~# zfs get volsize idle/robin/bar
NAME            PROPERTY  VALUE           SOURCE
idle/robin/bar  volsize   10G             -
fileserver:~# zfs get volsize idle/robin/zot
NAME            PROPERTY  VALUE           SOURCE
idle/robin/zot  volsize   10G             -

And a quick data integrity check:

> time find dnd -type f -exec cat {} \; | md5sum
b5f1fc52d09baaf9f3db34408ce9c184  -

real    4m26.241s

Time to attach zot to the mirror and wait for it to resilver.

client:/# zpool attach trump c1t010000144FF2985500002A004A31A1F7d0 c1t010000144FF2985500002A004A31B8A6d0
client:/# zpool status trump
  pool: trump
 state: FAULTED
status: One or more devices could not be opened.  Sufficient replicas exist for
        the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://www.sun.com/msg/ZFS-8000-2Q
 scrub: resilver in progress for 0h0m, 6.39% done, 0h3m to go
config:

        NAME                                       STATE     READ WRITE CKSUM
        trump                                      FAULTED      0     6     0  insufficient replicas
          mirror                                   ONLINE       0     0     0
            c1t010000144FF2985500002A004A31A1F7d0  ONLINE       0     0     0
            c1t010000144FF2985500002A004A31B8A6d0  ONLINE       0     0     0
          c1t010000144FF2985500002A004A304D18d0    UNAVAIL      0     6     0  cannot open

errors: No known data errors

0h3m became 0h6m; 0h6m became 0h10m; 0h10m became 0h30m...I went to get food. I'll work on this more later.

:wq