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<!--$Id: set_func_read.so,v 10.14 2003/09/25 15:28:08 bostic Exp $--> <!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: db_env_set_func_read</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> </head> <body bgcolor=white> <table width="100%"><tr valign=top> <td> <b>db_env_set_func_read</b> </td> <td align=right> <a href="../../db4-devel-4.7.25/api_c/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a> <a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a></td> </tr></table> <hr size=1 noshade> <tt> <b><pre> #include <db.h> <p> int db_env_set_func_read(ssize_t (*func_read)(int fd, void *buf, size_t nbytes)); </pre></b> <hr size=1 noshade> <b>Description: db_env_set_func_read</b> <p>Replace Berkeley DB calls to the IEEE/ANSI Std 1003.1 (POSIX) <b>read</b> function with <b>func_read</b>, which must conform to the standard interface specification.</p> <p>The db_env_set_func_read method configures all operations performed by a process and all of its threads of control, not operations confined to a single database environment.</p> <p>Although the db_env_set_func_read method may be called at any time during the life of the application, it should normally be called before making calls to the <a href="../../db4-devel-4.7.25/api_c/env_class.html">db_env_create</a> or <a href="../../db4-devel-4.7.25/api_c/db_class.html">db_create</a> methods.</p> <p>The db_env_set_func_read method returns a non-zero error value on failure and 0 on success. </p> <b>Parameters</b> <br> <b>func_read</b><ul compact><li>The <b>func_read</b> parameter is the replacement function. It must conform to the standard interface specification.</ul> <br> <br><b>See Also</b> <a href="../../db4-devel-4.7.25/ref/program/runtime.html">Run-time configuration</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db4-devel-4.7.25/api_c/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a><a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> </body> </html>
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