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Diffstat (limited to 'source3/registry/reg_backend_db.c')
| -rw-r--r-- | source3/registry/reg_backend_db.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/source3/registry/reg_backend_db.c b/source3/registry/reg_backend_db.c index 50fc20ea82..87837448d9 100644 --- a/source3/registry/reg_backend_db.c +++ b/source3/registry/reg_backend_db.c @@ -636,6 +636,27 @@ bool regdb_store_keys(const char *key, REGSUBKEY_CTR *ctr) regdb_fetch_keys(key, old_subkeys); + /* + * Make the store operation as safe as possible without transactions: + * + * (1) For each subkey removed from ctr compared with old_subkeys: + * + * (a) First delete the value db entry. + * + * (b) Next delete the secdesc db record. + * + * (c) Then delete the subkey list entry. + * + * (2) Now write the list of subkeys of the parent key, + * deleting removed entries and adding new ones. + * + * (3) Finally create the subkey list entries for the added keys. + * + * This way if we crash half-way in between deleting the subkeys + * and storing the parent's list of subkeys, no old data can pop up + * out of the blue when re-adding keys later on. + */ + /* store the subkey list for the parent */ if (!regdb_store_keys_internal(key, ctr) ) { |