mirror of
https://github.com/MariaDB/server.git
synced 2025-10-25 18:38:00 +03:00
77 lines
3.2 KiB
HTML
77 lines
3.2 KiB
HTML
<!--$Id: log_file.so,v 10.18 2000/03/01 21:41:29 bostic Exp $-->
|
|
<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
|
|
<!--All rights reserved.-->
|
|
<html>
|
|
<head>
|
|
<title>Berkeley DB: log_file</title>
|
|
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
|
|
<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
|
|
</head>
|
|
<body bgcolor=white>
|
|
<a name="2"><!--meow--></a>
|
|
<table><tr valign=top>
|
|
<td>
|
|
<h1>log_file</h1>
|
|
</td>
|
|
<td width="1%">
|
|
<a href="../api_c/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
|
|
</td></tr></table>
|
|
<hr size=1 noshade>
|
|
<tt>
|
|
<h3><pre>
|
|
#include <db.h>
|
|
<p>
|
|
int
|
|
log_file(DB_ENV *env,
|
|
const DB_LSN *lsn, char *namep, size_t len);
|
|
</pre></h3>
|
|
<h1>Description</h1>
|
|
<p>The log_file function maps
|
|
DB_LSN structures
|
|
to file names,
|
|
copying the name of the file containing the record named by <b>lsn</b>
|
|
into the memory location referenced by <b>namep</b>.
|
|
<p>The <b>len</b> argument is the length of the <b>namep</b> buffer in bytes.
|
|
If <b>namep</b> is too short to hold the file name, log_file will
|
|
return ENOMEM.
|
|
(Log file names are normally quite short, on the order of 10 characters.)
|
|
<p>This mapping of
|
|
DB_LSN structures
|
|
to files is needed for database administration. For example, a
|
|
transaction manager typically records the earliest
|
|
DB_LSN
|
|
needed for restart, and the database administrator may want to archive
|
|
log files to tape when they contain only
|
|
DB_LSN
|
|
entries before the earliest one needed for restart.
|
|
<p>The log_file function returns a non-zero error value on failure and 0 on success.
|
|
<h1>Errors</h1>
|
|
<p>The log_file function may fail and return a non-zero error for the following conditions:
|
|
<p><dl compact>
|
|
<p><dt>ENOMEM<dd>The supplied buffer was too small to hold the log file name.
|
|
</dl>
|
|
<p>The log_file 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_file function may fail and return
|
|
<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>, in which case all subsequent Berkeley DB calls will fail
|
|
in the same way.
|
|
<h1>See Also</h1>
|
|
<a href="../api_c/env_set_lg_bsize.html">DBENV->set_lg_bsize</a>,
|
|
<a href="../api_c/env_set_lg_max.html">DBENV->set_lg_max</a>,
|
|
<a href="../api_c/log_archive.html">log_archive</a>,
|
|
<a href="../api_c/log_compare.html">log_compare</a>,
|
|
<a href="../api_c/log_file.html">log_file</a>,
|
|
<a href="../api_c/log_flush.html">log_flush</a>,
|
|
<a href="../api_c/log_get.html">log_get</a>,
|
|
<a href="../api_c/log_put.html">log_put</a>,
|
|
<a href="../api_c/log_register.html">log_register</a>,
|
|
<a href="../api_c/log_stat.html">log_stat</a>
|
|
and
|
|
<a href="../api_c/log_unregister.html">log_unregister</a>.
|
|
</tt>
|
|
<table><tr><td><br></td><td width="1%">
|
|
<a href="../api_c/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
|
|
</td></tr></table>
|
|
<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
|
|
</body>
|
|
</html>
|