FROM: Jeff Johnson
DATE: 02/28/2002 15:09:33
SUBJECT: RE:  How do you fix a corrupt rpm database?

 

On Thu, Feb 28, 2002 at 04:34:05PM -0600, <EMAIL: PROTECTED> wrote:
> I have a problem using up2date.  The rpm database is corrupted. rpm --rebuilddb
> fails as does --initdb.  When using up2date, I get a number of error that specify
> a number of errors by line.
> 
> Is there some tool that can fix this?

No single tool, but here's what I do:

0) Make a copy of everything, just in case:
	cd /var/lib
	tar czvf /tmp/rpmdb.tar.gz rpm

1) Check /var/lib/rpm/Packages with db_verify.
	The command is
		db_verify /var/lib/rpm/Packages
	If that fails, the fix is
		cd /var/lib/rpm
		mv Packages Packages-ORIG
		db_dump Packages-ORIG | db_load Packages
	At this point Packages should be OK.

2) Read all Package headers.
	The command is
		rpm -qa
	If that "works", go to step 5), do "rpm --rebuilddb" and you're done.
	If that segfaults, go to 3).
	if that hangs, then do
		rm -f /var/lib/rpm/__db*
	and try again.

3) You have a segfault on a header.
	The first step is to get the segfaulting header instance.
	Append "debug" to the Packages configuration by
	  echo "%_dbi_config_Packages %{_dbi_htconfig} lockdbfd debug" \
		> /etc/rpm/macros

	Try "rpm -qa", lots of boring glop until segfault.

	On the screen will be something like

    ...
    Get Packages key (0x8216580,4) data (0x4014f008,155244) "#612" 47000000
rc 0kernel-enterprise-2.4.9-26beta.17
    Get Packages key ((nil),0) data ((nil),0) "" deadbeef rc -30990
    <segfault here>

	The 2nd to last "Get Packages" line is what you want, the
	bad header instance above is "612" in decimal. Note the
	package name-version-release, you'll want to reinstall
	that package somewhen.

4) Nuke the bad header.
	I usually whip out my handy-dandy header instance deleter,
	edit the bad record into the source, compile, run, and go back
	to step 2).


	The program is at
		ftp://people.redhat.com/jbj/t38454.c
	FWIW, the program is named after the bugzilla report that
	caused me to write it.

	Retrieve, and edit the bad header instances into
		...
		int badrecs[] = {
--> EDIT -->	        562, 566, 559, 561, 563, 560, 564,
		        -1
		};
		...

	Compile with
		cc -o t38454 t38454.c -ldb-3.2

	Run as
		t38454

	Go back to step 2).

5) Clean up.
	a) rpm --rebuilddb
	b) rm -f /etc/rpm/macros
	c) rm -rf /var/lib/rpmrebuild*
	d) Reinstall the deleted package.

Otherwise, give me a bug report at
	http://bugzilla.redhat.com
with a pointer (i.e. URL, bugzilla attachments won't work) to the
tarball you created in step 0), and I'll see what I can figger.

73 de Jeff

-- 
Jeff Johnson	ARS N3NPQ
<EMAIL: PROTECTED> (<EMAIL: PROTECTED>)
Chapel Hill, NC



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