int txn_recover(DB_ENV *dbenv, DB_PREPLIST preplist, long count, long *retp, u_int32_t flags);
The txn_recover interface returns a list of prepared but not yet resolved transactions. The txn_recover function should only be called after the environment has been recovered. Because database environment state must be preserved between recovery and the application calling txn_recover, applications must either call txn_recover using the same environment handle used when recovery is done, or the database environment must not be configured using the DB_PRIVATE flag.
On return from txn_recover, the preplist argument will be filled in with a list of transactions that must be resolved by the application (committed, aborted or discarded). The preplist argument is a structure of type DB_PREPLIST; the following DB_PREPLIST fields will be filled in:
The application must call txn_abort, txn_commit or txn_discard on each returned DB_TXN handle before starting any new operations.
The count parameter specifies the number of available entries in the passed-in preplist array. The retp parameter returns the number of entries txn_recover has filled in, in the array.
The flags value must be set to one of the following values:
The txn_recover function returns a non-zero error value on failure and 0 on success.
The txn_recover function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the txn_recover function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.
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