log_archive
log_archive |
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#include <db.h>int log_archive(DB_ENV *env, char *(*listp)[], u_int32_t flags);
The log_archive function creates a NULL-terminated array of log or database filenames, and copies a pointer to them into the user-specified memory location listp.
By default, log_archive returns the names of all of the log files that are no longer in use (for example, that are no longer involved in active transactions), and that may safely be archived for catastrophic recovery and then removed from the system. If there are no filenames to return, the memory location to which listp refers will be set to NULL.
Arrays of log filenames are created in allocated memory. If application-specific allocation routines have been declared (see DB_ENV->set_alloc for more information), they are used to allocate the memory; otherwise, the library function malloc(3) is used. The caller is responsible for deallocating the memory. To deallocate the memory, free the memory reference; references inside the returned memory need not be individually freed.
The flags value must be set to 0 or by bitwise inclusively OR'ing together one or more of the following values:
The DB_ARCH_DATA and DB_ARCH_LOG flags are mutually exclusive.
See the db_archive manual page for more information on database archival procedures.
The log_archive function is the underlying function used by the db_archive utility. See the db_archive utility source code for an example of using log_archive in a IEEE/ANSI Std 1003.1 (POSIX) environment.
The log_archive function returns a non-zero error value on failure and 0 on success.
In a threaded application (that is, one where the environment was created with the DB_THREAD flag specified), calling log_archive with the DB_ARCH_DATA flag will fail, returning EINVAL. To work around this problem, reopen the log explicitly without specifying DB_THREAD. This restriction is expected to be removed in a future version of Berkeley DB.
The log_archive function may fail and return a non-zero error for the following conditions:
The log was corrupted.
The log_archive 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 log_archive 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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Copyright Sleepycat Software @ 1.1 log @Initial revision @ text @d1 1 a1 1 @ 1.1.1.1 log @Import: RPM 4.0.3 @ text @@ 1.1.1.2 log @Import: RPM 4.0.4 @ text @d1 1 a1 1 d6 1 a6 1
The DB_ENV->log_archive function d31 1 a31 1
By default, DB_ENV->log_archive returns the names of all of the log d52 1 a52 1 DB_ENV->log_archive will not include them in this list. It is also a59 15
Log cursor handles (returned by the DB_ENV->log_cursor function) may have open file descriptors for log files in the database environment. Also, the Berkeley DB interfaces to the database environment logging subsystem (for example, DB_ENV->log_put and DB_TXN->abort) may allocate log cursors and have open file descriptors for log files as well. On operating systems where filesystem related system calls (for example, rename and unlink on Windows/NT) can fail if a process has an open file descriptor for the affected file, attempting to move or remove the log files listed by DB_ENV->log_archive may fail. All Berkeley DB internal use of log cursors operates on active log files only and furthermore, is short-lived in nature. So, an application seeing such a failure should be restructured to close any open log cursors it may have, and otherwise to retry the operation until it succeeds. (Although the latter is not likely to be necessary; it is hard to imagine a reason to move or rename a log file in which transactions are being logged or aborted.) d62 2 a63 2
The DB_ENV->log_archive function is the underlying function used by the db_archive utility. See the db_archive utility source code for an example of using DB_ENV->log_archive d65 1 a65 1
The DB_ENV->log_archive function returns a non-zero error value on failure and 0 on success. d68 1 a68 1 with the DB_THREAD flag specified), calling DB_ENV->log_archive with the d73 1 a73 1
The DB_ENV->log_archive function may fail and return a non-zero error for the following conditions: d78 2 a79 2
The DB_ENV->log_archive 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 DB_ENV->log_archive function may fail and return d87 1 a87 1 DB_ENV->log_archive, d89 6 a94 8 DB_ENV->log_cursor, DB_ENV->log_file, DB_ENV->log_flush, DB_ENV->log_put, DB_ENV->log_register, DB_ENV->log_stat, DB_ENV->log_unregister, DB_LOGC->close d96 1 a96 1 DB_LOGC->get. @ 1.1.1.3 log @Import: RPM 4.0.5 @ text @d1 2 a2 2 a3 1 d28 1 a28 1
The DB_ENV->log_archive method d40 1 a40 1 library malloc(3) interface is used. The caller is d60 1 a60 1
Log cursor handles (returned by the DB_ENV->log_cursor method) may have open d77 1 a77 1
The DB_ENV->log_archive method is the underlying interface used by the db_archive utility. d80 7 a86 1
The DB_ENV->log_archive method returns a non-zero error value on failure and 0 on success. d88 1 a88 1
The DB_ENV->log_archive method may fail and return a non-zero error for the following conditions: d93 4 a96 6
The DB_ENV->log_archive method 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 DB_ENV->log_archive method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.
The DB_ENV->log_archive function d41 1 a41 1 library function malloc(3) is used. The caller is d61 1 a61 1
Log cursor handles (returned by the DB_ENV->log_cursor function) may have open d78 1 a78 1
The DB_ENV->log_archive function is the underlying function used by the db_archive utility. d81 1 a81 7
The DB_ENV->log_archive function returns a non-zero error value on failure and 0 on success.
In a threaded application (that is, one where the environment was created with the DB_THREAD flag specified), calling DB_ENV->log_archive with the DB_ARCH_DATA flag will fail, returning EINVAL. To work around this problem, reopen the log explicitly without specifying DB_THREAD. This restriction is expected to be removed in a future version of Berkeley DB. d83 1 a83 1
The DB_ENV->log_archive function may fail and return a non-zero error for the following conditions: d88 6 a93 4
The DB_ENV->log_archive 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 DB_ENV->log_archive function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way. d95 1 a95 16 DB_ENV->set_lg_bsize, DB_ENV->set_lg_dir, DB_ENV->set_lg_max, DB_ENV->set_lg_regionmax, DB_ENV->log_archive, log_compare, DB_ENV->log_cursor, DB_ENV->log_file, DB_ENV->log_flush, DB_ENV->log_put, DB_ENV->log_register, DB_ENV->log_stat, DB_ENV->log_unregister, DB_LOGC->close and DB_LOGC->get. @ 1.1.1.5 log @Import: RPM 4.1.1 @ text @d1 2 a2 2 a3 1 d28 1 a28 1
The DB_ENV->log_archive method d40 1 a40 1 library malloc(3) interface is used. The caller is d60 1 a60 1
Log cursor handles (returned by the DB_ENV->log_cursor method) may have open d77 1 a77 1
The DB_ENV->log_archive method is the underlying interface used by the db_archive utility. d80 7 a86 1
The DB_ENV->log_archive method returns a non-zero error value on failure and 0 on success. d88 1 a88 1
The DB_ENV->log_archive method may fail and return a non-zero error for the following conditions: d93 4 a96 6
The DB_ENV->log_archive method 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 DB_ENV->log_archive method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.