tdb_check() will always return failure for a read-only database.
Silently, without any log output, when _tdb_lockall() fails.

This happens every time winbindd starts up, so offline login never works.

winbindd_validate_cache: replacing panic function
tdb_validate_open called for tdb '/var/lib/samba/winbindd_cache.tdb'
tdb_validate called for tdb '/var/lib/samba/winbindd_cache.tdb'
tdb_validate: forking to let child do validation.
tdb_validate: fork succeeded, child PID = 10213
tdb_validate: waiting for child to finish...
tdb_validate (validation child): created
tdb_validate (validation child): calling tdb_validate_child
tdb_validate_child: summary of validation status:
 * tdb error: yes
 * bad freelist: no
 * bad entry: no
 * unknown key: no
 => overall success: no
tdb_validate: validating child returned.
tdb_validate: child exited, code 255.
tdb_validate returning code '255' for tdb '/var/lib/samba/winbindd_cache.tdb'
tdb '/var/lib/samba/winbindd_cache.tdb' is invalid
Could not stat '/var/lib/samba/winbindd_cache.tdb.bak': No such file or
directory
No backup found.
moved '/var/lib/samba/winbindd_cache.tdb' to
'/var/lib/samba/winbindd_cache.tdb.corrupt'
Corrupt tdb stored as '/var/lib/samba/winbindd_cache.tdb.corrupt'
winbindd_validate_cache: validation not successful.
removing tdb /var/lib/samba/winbindd_cache.tdb.
winbindd_validate_cache: restoring panic function
winbindd cache tdb corrupt and no backup could be restored.
initialize_winbindd_cache: clearing cache and re-creating with version number 1


[root@i7 dwoodhou]# rpm -q samba-winbind libtdb
samba-winbind-3.5.4-62.fc13.x86_64
libtdb-1.2.1-2.fc13.x86_64