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From: scjones@thor.UUCP (Larry Jones)
Newsgroups: comp.unix.sysv386
Subject: Inode Bug Fix for ISC 2.0.2
Message-ID: <109@thor.UUCP>
Date: 9 Jan 91 21:48:26 GMT
Organization: SDRC, Cincinnati
Lines: 84

Due to popular demand, here's the fix for ISC 2.0.2 as originally
posted by Bill Wells:

I made a similar patch for Microport SysV/386 3.0e and have been
running it for most of this year without problems. I was asked to
solve this for Interactive 2.0.2 and did so. However, I did the work
on my Microport system, and the enclosed shell script works on that;
it ought to work on an Interactive system but I've not tried this.

With that caveat, here is what you do to patch your kernel. First,
run the shell script. Make sure that it behaved correctly. Then save
a copy of your good kernel and /etc/conf/pack.d/s5/Driver.o. If you
are really paranoid, back up your whole system, though this shouldn't
be necessary. Replace the Driver.o file with the one on /tmp.
Finally, rebuild your kernel. That particular bug should never bite
you again. Further kernel builds will have the bug fixed as well. If
you have any problems, send me e-mail. I'll try to get back to you
quicker than I did with this! If the patch causes some nasty kind of
crash, please post immediately in hopes that others will read your
message before having tried the patch.

in=/etc/conf/pack.d/s5/Driver.o
out=/tmp/Driver.o

# check that we have the right Driver.o file

if [ x"`sum $in`" != x"50880 81 $in" ]; then
	echo "sum failed"
	exit 1
fi
if [ x"`sum -r $in`" != x"33908    81 $in" ]; then
	echo "sum -r failed"
	exit 1
fi

# copy the file and make an appropriate fix

{
	dd ibs=1 obs=1k count=1977
	dd bs=19 count=1 of=/dev/null
	echo '\074\0144\017\0204\0327\0376\0377\0377\0146\c'
	echo '\0307\0207\0324\00\00\00\0144\00\0353\0151\c'
	dd bs=16k
} <$in >$out

# compare the list of differences against the expected differences

cat <<\+ >/tmp/fix$$
  1978  75  74
  1980   0  17
  1981   0 204
  1982   0 327
  1983 164 376
  1984  14 377
  1985 146 377
  1986 307 146
  1987 207 307
  1988 324 207
  1989   0 324
  1992 144   0
  1993   0 144
  1994 353   0
  1995 152 353
  1996 220 151
+
if cmp -l $in $out | cmp -s - /tmp/fix$$; then
	rm /tmp/fix$$
	exit 0
else
	rm /tmp/fix$$
	echo "patch failed"
	exit 1
fi

---
Bill                    { uunet | novavax | ankh | sunvice } !twwells!bill
bill@twwells.com
----
Larry Jones                         UUCP: uunet!sdrc!thor!scjones
SDRC                                      scjones@thor.UUCP
2000 Eastman Dr.                    BIX:  ltl
Milford, OH  45150-2789             AT&T: (513) 576-2070
This sounds suspiciously like one of Dad's plots to build my character.
-- Calvin