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>
index | next in thread | previous in thread | raw e-mail
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 Lachmanhome | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4849C258.6090003>