Date: Sat, 07 Jun 2008 01:03:52 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Colin Percival <cperciva@freebsd.org> Cc: stable-list freebsd <freebsd-stable@freebsd.org> Subject: Re: freebsd-update 6.2-R -> 6.3-B1 rollback failed Message-ID: <4849C258.6090003@quip.cz> In-Reply-To: <473F0939.9050800@freebsd.org> References: <473B5D10.1070109@janh.de> <473BD54F.9050808@freebsd.org> <473C1FD1.70001@janh.de> <473DA6B5.10107@freebsd.org> <473EF438.5090004@janh.de> <473F0939.9050800@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Colin Percival wrote: > Jan Henrik Sylvester wrote: > >>>In short, as long as you don't build a custom kernel but call it >>>"GENERIC" or >>>"SMP", FreeBSD Update should automatically DTRT. >> >>That is exactly my question. On 6.2-RELEASE, I sometimes used a modified >>ld-elf.so.1 or a single patched module without recompiling the kernel. >>What does using freebsd-update (accidentally or deliberately) do in that >>case? By accident, I discovered that it does not always fail. Does it >>skip the modified files, overwrite them with new versions, or overwrite >>them with an unpredictable bdiff merge that is likely garbage? > > > Depending on the UpdateIfUnmodified option in freebsd-update.conf, it will > either update files to "clean" new versions or print a warning message and > not touch them. > > There's also an IgnorePaths directive which you can use to tell FreeBSD > Update not to touch some files (even if they haven't been modified locally). > > FreeBSD Update will never produce mangled files as a result of applying a > bsdiff patch to the wrong file -- it checks file hashes before and after > applying patches and gracefully falls back to downloading complete files > if it can't generate a file via patching. Is it possible to configure freebsd-update to not remove old kernel directory and just rename it to kernel.old or something else? Two times I end up with unbootable machine (upgraded from 6.3 to 7.0 - 7.x version kernel always hangs on this machine, even with CD boot) and then I must use bootable CD / flashdisk with old 6.x kernel to be able to run freebsd-update rollback. It will be useful if one can choose to leave old kernel in boot directory to be able to boot it if something goes wrong. Miroslav Lachman
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4849C258.6090003>