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diskless NetBSD/macppc 5.0
(Apologies for the large recipient list, but it is not clear to me
which recipient is obviously preferable.)
This evening I netbooted NetBSD on a PowerBook from a MacBook running
Mac OS X. I had never netbooted NetBSD before, so I was following the
instructions at <http://www.netbsd.org/docs/network/netboot/>, the
NetBSD/macppc INSTALL.txt document, and the diskless(8) man page. I
eventually got the machine booted, but I encountered a number of snags
along the way. I have attached a file chronicling them to the best of
my memory, with some suggestions for fixes to the documents. Let me
know if you'd like more detailed suggestions.
* Notes on Netbooting NetBSD/macppc 5.0 from Mac OS X -*- outline -*-
** FTP Site
At <http://www.netbsd.org/docs/network/netboot/intro.html>, there is
some information out of date concerning the FTP site:
. In Step 2, the reader is instructed to create a directory called
`security', for no extant reason of which I am aware; I think the
step can be omitted altogether.
. In Step 8, /pub/NetBSD/NetBSD-release/<client-arch>/ does not exist
in NetBSD's FTP site; instead /pub/NetBSD/NetBSD-<version>/<arch>/ is
the right pathname, I think.
. In Step 9, the kernel set is called kern-<CONF>.tgz, not kern.tgz.
Also, for NetBSD/macppc, and possibly for other powerpc-based ports,
installation/ofwboot.xcf is necessary too.
** Mac OS X Changes
*** tftpd: inetd -> xinetd -> launchd
At <http://www.netbsd.org/docs/network/netboot/tftpd.html>, the section
on Mac OS X discusses inetd and its replacement xinetd. Now xinetd has
itself been replaced by launchd, which is what controls tftpd these
days, in /System/Library/LaunchDaemons/tftpd.plist. Simply run
sudo /bin/launchctl load -F /System/Library/LaunchDaemons/tftpd.plist
to prepare it, or edit that file to omit the disabled key and run
sudo /bin/launchctl load /System/Library/LaunchDaemons/tftpd.plist
(Launchd will not actually run tftpd until there are packets addressed
to tftpd on the network interface.)
*** nfsd: NetInfo -> launchd
At <http://www.netbsd.org/docs/network/netboot/nfs.html>, the section on
Mac OS X explains how to set up NFS exports in NetInfo. In Mac OS X
10.5 Leopard, NetInfo was eliminated; the NFS server is now configured
in /etc/exports and managed by launchd, which monitors /etc/exports and
starts the NFS server as soon as that file exists (and stops it as soon
as it ceases to exist). The format of /etc/exports is as usual.
*** Mac OS X's /etc/hostconfig
/etc/hostconfig, which will probably be gone in Mac OS X 10.6 Snow
Leopard; in Mac OS X 10.5 Leopard, it begins with a comment
# This file is going away
Instead, to inhibit Mac OS X's bootpd, ensure that the entry
is in /System/Library/LaunchDaemons/bootps.plist. (Yes, that's
bootps.plist, not bootpd.plist.)
In <http://www.netbsd.org/docs/network/netboot/finish.html>, the link
to <http://www.darwinfo.org/howto/SystemStarter_HOWTO.shtml>, under the
section on Mac OS X, is broken. darwinfo.org appears to have been
taken by a domain squatter. Furthermore, the suggested StartupItem
refers to NetInfo, which is no more in Mac OS X 10.5 Leopard. However,
I don't know what to replace it by.
** Booting NetBSD
None of the instructions, either in the diskless(8) man page, the
NetBSD/macppc INSTALL document, or the Diskless HOW-TO on the web at
<http://www.netbsd.org/docs/network/netboot/>, mentioned anything about
how to prepare a kernel for NetBSD/macppc. It seemed to work to
extract kern-GENERIC.tgz in /export/client/root, and to pass
`enet:/netbsd' to the boot loader at the Open Firmware prompt.
*** boot command
Like <http://mail-index.netbsd.org/port-macppc/2003/05/13/0000.html>, I
needed pass an argument for the kernel pathname, `enet:/netbsd'. The
full incantation that worked was:
boot enet:0,ofwboot.xcf enet:/netbsd
It is not clear to me how the INSTALL file's short incantation
is supposed to inform ofwboot.xcf where to find the kernel, or what
kernel to find, so I don't think that the short incantation can work,
unless it requires some other magic that was not documented.
*** Swap files
It did not work to create a directory /export/client/root/swap and a
file of N megabytes all zero /export/client/swap on the NFS server, and
to put in the client's /etc/fstab the line
nfsserver:/export/client/swap none swap sw,nfsmntpt=/swap
Doing so caused Mac OS X's NFS server to return ERR_NOENT when NetBSD
requested mounting /export/client/swap, as `swapctl -A' would try.
involves a similar problem, I think.
It did work to put N megabytes of zeros in /export/client/root/swap and
/swap none swap sw
to the client's /etc/fstab. But this seems somewhat fragile.
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