Date: Tue, 6 Oct 1998 20:46:20 -0700 (PDT) From: jimd@mail.starshine.org To: freebsd-questions@FreeBSD.ORG Cc: jimd@mail.starshine.org Subject: cpio segfaults on /dev/??? Message-ID: <199810070346.UAA00288@strawberry.adc.rsv.ricoh.com>
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Yuck! I don't have a real editor! Blasted lame lynx configuration!
Okay, here's the problem. My wife had one of her servers suddenly
forget how to boot. (I don't know what's up with that --- but they
were planning on swapping out that hardware for another box anyway
--- so this just accelerated the process a bit.
We boot this thing into the "holoshell?" (rescue shell), configure
the other box to let us rsh to it, and issue something like the
following commands:
rcp /etc/passwd other:/etc/passwd
rcp /etc/group other:/etc/group
That's to make sure that the ownership gets preserved in the
next step --- I've had problems with GNU cpio's -n --numeric-uid-gid
switch so this is the workaround. (Does the FreeBSD cpio have that
bug?).
Next we do something like:
cd /mnt/oldroot
find . -print0 | cpio -o0BH crc | rsh other "( cd / && cpio \
-ivumd )"
... which goes for a short time then segfaults on one of the rd*
nodes.
We're now working around that by using -print | grep -v "^./dev/" | ...
which seems to be working (actually we also moved the "v" (verbose)
switch from the remote cpio back to the local one --- but I doubt that's
relevant).
So, why does cpio/FreeBSD barf when writing over one of the device
nodes? cpio is supposed to "know" about device nodes and properly
handle the appropriate unlink and mknod system calls, isn't it?
All answers, even flames, appreciated. TIA.
Jim Dennis,
Proprietor, Starshine Technical Services
(Linux Gazette, ``Answer Guy'')
PS: Okay -- it *seemed* to be working. Now it segfaults in the /bin
directory. We'll try the old 'tar | rsh other "(cd ... && tar xf - )"
trick. I moved away from that method on Linux (using GNU tar) when
I found a bug in setting the perms on empty directories; luckily they
fixed that awhile ago. Geeeezzzz!
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