1<!--$Id: env_fileid_reset.so,v 1.3 2005/12/13 16:48:01 bostic Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: DB_ENV->fileid_reset</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>DB_ENV->fileid_reset</b> 14</td> 15<td align=right> 16<a href="/api_c/api_core.html"><img src="/images/api.gif" alt="API"></a> 17<a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a></td> 18</tr></table> 19<hr size=1 noshade> 20<tt> 21<b><pre> 22#include <db.h> 23<p> 24int 25DB_ENV->fileid_reset(DB_ENV *dbenv, const char *file, u_int32_t flags); 26</pre></b> 27<hr size=1 noshade> 28<b>Description: DB_ENV->fileid_reset</b> 29<p>The DB_ENV->fileid_reset method allows database files to be copied, and 30then the copy used in the same database environment as the original.</p> 31<p>All databases contain an ID string used to identify the database in the 32database environment cache. If a physical database file is copied, and 33used in the same environment as another file with the same ID strings, 34corruption can occur. The DB_ENV->fileid_reset method creates new ID 35strings for all of the databases in the physical file.</p> 36<p>The DB_ENV->fileid_reset method modifies the physical file, in-place. 37Applications should not reset IDs in files that are currently in use.</p> 38<p>The DB_ENV->fileid_reset method may be called at any time during the life of the 39application.</p> 40<p>The DB_ENV->fileid_reset method 41returns a non-zero error value on failure 42and 0 on success. 43</p> 44<b>Parameters</b> <br> 45 <b>file</b><ul compact><li>The name of the physical file in which new file IDs are to be created.</ul> 46 <b>flags</b><ul compact><li>The <b>flags</b> parameter must be set to 0 or 47the following value: 48<br> 49<b>DB_ENCRYPT</b><ul compact><li>The file contains encrypted databases.</ul> 50<br></ul> 51<br> 52<br><b>Errors</b> 53<p>The DB_ENV->fileid_reset method 54may fail and return one of the following non-zero errors:</p> 55<br> 56<b>EINVAL</b><ul compact><li>An 57invalid flag value or parameter was specified.</ul> 58<br> 59<hr size=1 noshade> 60<br><b>Class</b> 61<a href="/api_c/env_class.html">DB_ENV</a> 62<br><b>See Also</b> 63<a href="/api_c/env_list.html">Database Environments and Related Methods</a> 64</tt> 65<table width="100%"><tr><td><br></td><td align=right> 66<a href="/api_c/api_core.html"><img src="/images/api.gif" alt="API"></a><a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a> 67</td></tr></table> 68<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 69</body> 70</html> 71
